TY  - JOUR
AU  - Odanović, Zoran
AU  - Grabulov, Vencislav
AU  - Arsić, Miodrag
AU  - Đurđević, Mile
AU  - Katavić, Boris
PY  - 2011
UR  - http://rims.institutims.rs/handle/123456789/130
AB  - Najznačajniji delovi hidroelektrana, vratila turbina izložena su tokom rada visokim naprezanjima, puzamju, zamoru i koroziji. Zbog toga je korisno preduprediti oštećenja tokom rada, povećati pouzdanost i produžiti radni vek postrojenja. Eksploatacioni uslovi mogu da dovedu do prslina i loma u homogenom materijalu, tako da postoji potreba za reparaturom dela postrojenja. A ona može biti skupa ili dugotrajna. U okolnostima kada se reparatura izvodi na licu mesta, posebno pažljivo treba da se definiše tehnologija reparaturnog zavarivanja, parametri postupka, i izbor dodatnog materijala. U ovom istraživanju izbor dodatnog materijala je bio tema i dati su rezultati. Vratilo je izrađeno od čeličnog liva 20Mn5 i na njemu su metodama IBR, otkrivena oštećenja tipa prslina dužine do 400 mm i dubine do 20 mm. Kako je planirano da se reparatura izvede bez demontaže vratila, primena termičke obrade nije bila izvodljiva. Analiza zavarljivosti osnovnoog materijala urađena je korišćenjem analitičkih jednačina. Rezultati su pokazali da je zavarljivost ovog čelika ograničena. Za reparaturno zavarivanje izabran je postupak REL (111) i dve obložene austenitne elektrode sa ciljem određivanja pogodnosti za upotrebu kao potencijalnih dodatnih materijala za reparaturu. U ovom istraživanju ispitane su Fe-Ni-Cr-Mo elektroda i elektroda na bazi Ni i njihove osobine su upoređene. Ispitivanje zatezanjem, ispitivanje apsorbovane energije, ispitivanje savijanjem, merenje tvrdoće i ispiivanje osetljivosti kao što su 'CTS' i 'Y' probe, izvedeni su na ispitnim spojevima dobijenim zavarivanjem osnovnog materijala, 20Mn5, ispitivanje savijanjem, merenje tvrdoće i ispiivanje osetljivosti kao što su 'CTS' i 'Y' probe izvedeni su na ispitnim spojevima dobijenim zavarivanjem osnovnog materijala, čelika 20Mn5, sa ispitivanim dodatnim materijalima. Dobijeni rezultati su analizirani i na osnovu toga, odabrana je elektroda na bazi Ni kao pogodnija za reparaturno zavarivanje.
AB  - The most significant components of hydropower plants are turbine shafts and generator rotors which undergo time-dependent processes such as high stresses, creep, fatigue and corrosion. It is therefore desirable to prevent in-service damages, improve reliability and extend the operational life of the plant. Plant operation can lead to cracking and failures in homogeneous materials, therefore a need for repair welding on plant components, which can be expensive and time-consuming, exists. In the circumstances when repair welding has to be carried out on site, special care has to be taken in defining repair welding technology, process parameters and selection of filler materials. In this research a selection of filler materials for repair welding on site of hydropower turbine shaft was performed and results were presented. The shaft was made of the cast steel 20Mn5 and presence of damages in the form of cracks which were up to 400 mm long and up to 20 mm deep was detected through the use of NDT methods. As the repairing was planned to be carried out without disassembling of the shaft, application of heat treatment procedures was not feasible. Weldability analysis of the base material was performed through the use of analytical equations. Results have shown that weldability of this steel is limited. For the repair welding a MMA (111) welding process was selected and two covered austenitic electrodes were analyzed in order to establish the feasibility of their use as potential filler material for repairing. In this research a Fe-Ni-Cr-Mo electrode and Ni based electrode were tested and their properties were compared. Tensile testing, absorbed energies tests, bending tests, hardness measurements and sensitivity tests such as 'CTS' and 'Y' were performed on test joints obtained by welding of base material, 20Mn5 steel, with investigated filler materials. Obtained results were analyzed and a Ni based electrode was selected as most suitable for repair welding.
PB  - DUZS - Društvo za unapređivanje zavarivanja u Srbiji, Beograd
T2  - Zavarivanje i zavarene konstrukcije
T1  - Izbor optimalnog dodatnog materijala za reparaturno zavarivanje vratila turbine hidrocentrale na licu mesta
T1  - Selection of the optimal filler material for on-site repair welding of the turbine shaft at the hydropower plant
EP  - 166
IS  - 4
SP  - 149
VL  - 56
UR  - https://hdl.handle.net/21.15107/rcub_rims_130
ER  - 

@article{
author = "Odanović, Zoran and Grabulov, Vencislav and Arsić, Miodrag and Đurđević, Mile and Katavić, Boris",
year = "2011",
abstract = "Najznačajniji delovi hidroelektrana, vratila turbina izložena su tokom rada visokim naprezanjima, puzamju, zamoru i koroziji. Zbog toga je korisno preduprediti oštećenja tokom rada, povećati pouzdanost i produžiti radni vek postrojenja. Eksploatacioni uslovi mogu da dovedu do prslina i loma u homogenom materijalu, tako da postoji potreba za reparaturom dela postrojenja. A ona može biti skupa ili dugotrajna. U okolnostima kada se reparatura izvodi na licu mesta, posebno pažljivo treba da se definiše tehnologija reparaturnog zavarivanja, parametri postupka, i izbor dodatnog materijala. U ovom istraživanju izbor dodatnog materijala je bio tema i dati su rezultati. Vratilo je izrađeno od čeličnog liva 20Mn5 i na njemu su metodama IBR, otkrivena oštećenja tipa prslina dužine do 400 mm i dubine do 20 mm. Kako je planirano da se reparatura izvede bez demontaže vratila, primena termičke obrade nije bila izvodljiva. Analiza zavarljivosti osnovnoog materijala urađena je korišćenjem analitičkih jednačina. Rezultati su pokazali da je zavarljivost ovog čelika ograničena. Za reparaturno zavarivanje izabran je postupak REL (111) i dve obložene austenitne elektrode sa ciljem određivanja pogodnosti za upotrebu kao potencijalnih dodatnih materijala za reparaturu. U ovom istraživanju ispitane su Fe-Ni-Cr-Mo elektroda i elektroda na bazi Ni i njihove osobine su upoređene. Ispitivanje zatezanjem, ispitivanje apsorbovane energije, ispitivanje savijanjem, merenje tvrdoće i ispiivanje osetljivosti kao što su 'CTS' i 'Y' probe, izvedeni su na ispitnim spojevima dobijenim zavarivanjem osnovnog materijala, 20Mn5, ispitivanje savijanjem, merenje tvrdoće i ispiivanje osetljivosti kao što su 'CTS' i 'Y' probe izvedeni su na ispitnim spojevima dobijenim zavarivanjem osnovnog materijala, čelika 20Mn5, sa ispitivanim dodatnim materijalima. Dobijeni rezultati su analizirani i na osnovu toga, odabrana je elektroda na bazi Ni kao pogodnija za reparaturno zavarivanje., The most significant components of hydropower plants are turbine shafts and generator rotors which undergo time-dependent processes such as high stresses, creep, fatigue and corrosion. It is therefore desirable to prevent in-service damages, improve reliability and extend the operational life of the plant. Plant operation can lead to cracking and failures in homogeneous materials, therefore a need for repair welding on plant components, which can be expensive and time-consuming, exists. In the circumstances when repair welding has to be carried out on site, special care has to be taken in defining repair welding technology, process parameters and selection of filler materials. In this research a selection of filler materials for repair welding on site of hydropower turbine shaft was performed and results were presented. The shaft was made of the cast steel 20Mn5 and presence of damages in the form of cracks which were up to 400 mm long and up to 20 mm deep was detected through the use of NDT methods. As the repairing was planned to be carried out without disassembling of the shaft, application of heat treatment procedures was not feasible. Weldability analysis of the base material was performed through the use of analytical equations. Results have shown that weldability of this steel is limited. For the repair welding a MMA (111) welding process was selected and two covered austenitic electrodes were analyzed in order to establish the feasibility of their use as potential filler material for repairing. In this research a Fe-Ni-Cr-Mo electrode and Ni based electrode were tested and their properties were compared. Tensile testing, absorbed energies tests, bending tests, hardness measurements and sensitivity tests such as 'CTS' and 'Y' were performed on test joints obtained by welding of base material, 20Mn5 steel, with investigated filler materials. Obtained results were analyzed and a Ni based electrode was selected as most suitable for repair welding.",
publisher = "DUZS - Društvo za unapređivanje zavarivanja u Srbiji, Beograd",
journal = "Zavarivanje i zavarene konstrukcije",
title = "Izbor optimalnog dodatnog materijala za reparaturno zavarivanje vratila turbine hidrocentrale na licu mesta, Selection of the optimal filler material for on-site repair welding of the turbine shaft at the hydropower plant",
pages = "166-149",
number = "4",
volume = "56",
url = "https://hdl.handle.net/21.15107/rcub_rims_130"
}

Odanović, Z., Grabulov, V., Arsić, M., Đurđević, M.,& Katavić, B.. (2011). Izbor optimalnog dodatnog materijala za reparaturno zavarivanje vratila turbine hidrocentrale na licu mesta. in Zavarivanje i zavarene konstrukcije
DUZS - Društvo za unapređivanje zavarivanja u Srbiji, Beograd., 56(4), 149-166.
https://hdl.handle.net/21.15107/rcub_rims_130

Odanović Z, Grabulov V, Arsić M, Đurđević M, Katavić B. Izbor optimalnog dodatnog materijala za reparaturno zavarivanje vratila turbine hidrocentrale na licu mesta. in Zavarivanje i zavarene konstrukcije. 2011;56(4):149-166.
https://hdl.handle.net/21.15107/rcub_rims_130 .

Odanović, Zoran, Grabulov, Vencislav, Arsić, Miodrag, Đurđević, Mile, Katavić, Boris, "Izbor optimalnog dodatnog materijala za reparaturno zavarivanje vratila turbine hidrocentrale na licu mesta" in Zavarivanje i zavarene konstrukcije, 56, no. 4 (2011):149-166,
https://hdl.handle.net/21.15107/rcub_rims_130 .

TY  - JOUR
AU  - Odanović, Zoran
AU  - Blačić, Ivo
AU  - Vracarić, D.
AU  - Grabulov, Vencislav
AU  - Burzić, Meri
AU  - Katavić, Boris
PY  - 2010
UR  - http://rims.institutims.rs/handle/123456789/113
AB  - Metallurgical evaluation was performed on a fractured column tube of the reformer furnace in an ammonia plant. The tubes were manufactured from centrifugally cast heat resistant steel HK 40. Optical and scanning electron microscope (SEM) were used for microstructural and fracture analysis. For composition determination of the microconstituents energy dispersive X ray spectroscopy (EDS) was used. To evaluate mechanical properties, hardness and microhardness measurements were performed. Investigations based on the microstructural features with the idea to indicate suitability of weld repair of the column were performed in this study. It was observed that the crack initiation, caused by oxidation/corrosion and thermal stresses induced by temperature gradient, appeared in the inner side of the tube wall and propagation occurred along grain boundaries. The results clearly showed the presence of an irregular microstructure which contributed to crack propagation through the tube wall. An occurrence of precipitated needle-shaped carbides/carbonitrides and brittle a phase was also identified in the microstructure. Results of the microstructural and fracture analysis clearly indicate that reformer furnace columns made of heat resistant steel HK 40 were unsuitable for weld repair.
PB  - Consejo Superior Investigaciones Cientificas-Csic, Madrid
T2  - Revista de Metalurgia
T1  - Microstructural analysis as the indicator for suitability of weld repairing of the heat resistant Cr - Ni steel
EP  - 330
IS  - 4
SP  - 320
VL  - 46
DO  - 10.3989/revmetalm.0939
ER  - 

@article{
author = "Odanović, Zoran and Blačić, Ivo and Vracarić, D. and Grabulov, Vencislav and Burzić, Meri and Katavić, Boris",
year = "2010",
abstract = "Metallurgical evaluation was performed on a fractured column tube of the reformer furnace in an ammonia plant. The tubes were manufactured from centrifugally cast heat resistant steel HK 40. Optical and scanning electron microscope (SEM) were used for microstructural and fracture analysis. For composition determination of the microconstituents energy dispersive X ray spectroscopy (EDS) was used. To evaluate mechanical properties, hardness and microhardness measurements were performed. Investigations based on the microstructural features with the idea to indicate suitability of weld repair of the column were performed in this study. It was observed that the crack initiation, caused by oxidation/corrosion and thermal stresses induced by temperature gradient, appeared in the inner side of the tube wall and propagation occurred along grain boundaries. The results clearly showed the presence of an irregular microstructure which contributed to crack propagation through the tube wall. An occurrence of precipitated needle-shaped carbides/carbonitrides and brittle a phase was also identified in the microstructure. Results of the microstructural and fracture analysis clearly indicate that reformer furnace columns made of heat resistant steel HK 40 were unsuitable for weld repair.",
publisher = "Consejo Superior Investigaciones Cientificas-Csic, Madrid",
journal = "Revista de Metalurgia",
title = "Microstructural analysis as the indicator for suitability of weld repairing of the heat resistant Cr - Ni steel",
pages = "330-320",
number = "4",
volume = "46",
doi = "10.3989/revmetalm.0939"
}

Odanović, Z., Blačić, I., Vracarić, D., Grabulov, V., Burzić, M.,& Katavić, B.. (2010). Microstructural analysis as the indicator for suitability of weld repairing of the heat resistant Cr - Ni steel. in Revista de Metalurgia
Consejo Superior Investigaciones Cientificas-Csic, Madrid., 46(4), 320-330.
https://doi.org/10.3989/revmetalm.0939

Odanović Z, Blačić I, Vracarić D, Grabulov V, Burzić M, Katavić B. Microstructural analysis as the indicator for suitability of weld repairing of the heat resistant Cr - Ni steel. in Revista de Metalurgia. 2010;46(4):320-330.
doi:10.3989/revmetalm.0939 .

Odanović, Zoran, Blačić, Ivo, Vracarić, D., Grabulov, Vencislav, Burzić, Meri, Katavić, Boris, "Microstructural analysis as the indicator for suitability of weld repairing of the heat resistant Cr - Ni steel" in Revista de Metalurgia, 46, no. 4 (2010):320-330,
https://doi.org/10.3989/revmetalm.0939 . .

TY  - JOUR
AU  - Katavić, Boris
AU  - Jegdić, Bore
AU  - Odanović, Zoran
AU  - Hut, Nenad
AU  - Mladenović, Mladen
AU  - Jaković, Dragan
AU  - Ristivojević, M.
PY  - 2010
UR  - http://rims.institutims.rs/handle/123456789/114
AB  - Već dugi niz godina se čelik 13CrMo4-5 (~Č7400) primenjuje za izradu delova termoenergetskih postrojenja kao što su elementi kotlova i cevi. Ovaj čelik pripada grupi uslovno zavarljivih čelika, koji mogu uspešno da se zavaruju uz primenu posebnih mera, kao što su predgrevanje, termička obrada nakon zavarivanja i drugih mera predostrožnosti, a obično se koristi dodatni materijal sličnog hemijskog sastava. Obzirom na specifičnost primene, pri reparaturnom zavarivanju posebno interventnom zavarivanju, potrebno je voditi računa o parametrima procesa zavarivanja i izboru dodatnih materijala. U radu je izvedena proračunska analiza i predviđanje optimalnih parametara reparaturnog zavarivanja sa ciljem dobijanja kvalitetnog zavarenog spoja sa zahtevanim mehaničkim osobinama bez naknadne termičke obrade. Pored toga izvršen je kontrolni proračun čvrstoće metala šava za dodatni materijal sličnog hemijskog sastava, a na osnovu predloženih parametara zavarivanja.
AB  - Over the years 13CrMo4-5 (~Č 7400) steel is applied for production of the parts as pressure vessels and pipes in the thermo energetic plants. Steel 13CrMo4-5 is conditionally weldable and it could be successfully welded and weld repaired with the special care and if preheating and post weld heat treating (PWHT) procedure are applied. It is usually welded with similar filler material. In consideration to specific application of the 13CrMo4-5 steel, in the case of breakdown and emergency repair welding, special care have to be taken to defining welding process parameters and selection of the filler materials. In this investigation a results of the calculations and estimations for the repair welding parameters is based on the analytical equations. Analysis is performed to obtaining optimal parameters for sound welded joint with optimal quality and mechanical properties without PWHT of the joint. Also, calculations of the weld metal strength are performed on the base of previously defined welding parameters for the filler metal similar to base metal.
PB  - DUZS - Društvo za unapređivanje zavarivanja u Srbiji, Beograd
T2  - Zavarivanje i zavarene konstrukcije
T1  - Predviđanje optimalnih parametara interventnog reparaturnog zavarivanja čelika 13CrMo4-5 analitičkim metodama
T1  - Optimal parameters estimation by the analytical methods for the emergency repair welding of the 13CrMo4-5 steel
EP  - 96
IS  - 3
SP  - 91
VL  - 55
UR  - https://hdl.handle.net/21.15107/rcub_rims_114
ER  - 

@article{
author = "Katavić, Boris and Jegdić, Bore and Odanović, Zoran and Hut, Nenad and Mladenović, Mladen and Jaković, Dragan and Ristivojević, M.",
year = "2010",
abstract = "Već dugi niz godina se čelik 13CrMo4-5 (~Č7400) primenjuje za izradu delova termoenergetskih postrojenja kao što su elementi kotlova i cevi. Ovaj čelik pripada grupi uslovno zavarljivih čelika, koji mogu uspešno da se zavaruju uz primenu posebnih mera, kao što su predgrevanje, termička obrada nakon zavarivanja i drugih mera predostrožnosti, a obično se koristi dodatni materijal sličnog hemijskog sastava. Obzirom na specifičnost primene, pri reparaturnom zavarivanju posebno interventnom zavarivanju, potrebno je voditi računa o parametrima procesa zavarivanja i izboru dodatnih materijala. U radu je izvedena proračunska analiza i predviđanje optimalnih parametara reparaturnog zavarivanja sa ciljem dobijanja kvalitetnog zavarenog spoja sa zahtevanim mehaničkim osobinama bez naknadne termičke obrade. Pored toga izvršen je kontrolni proračun čvrstoće metala šava za dodatni materijal sličnog hemijskog sastava, a na osnovu predloženih parametara zavarivanja., Over the years 13CrMo4-5 (~Č 7400) steel is applied for production of the parts as pressure vessels and pipes in the thermo energetic plants. Steel 13CrMo4-5 is conditionally weldable and it could be successfully welded and weld repaired with the special care and if preheating and post weld heat treating (PWHT) procedure are applied. It is usually welded with similar filler material. In consideration to specific application of the 13CrMo4-5 steel, in the case of breakdown and emergency repair welding, special care have to be taken to defining welding process parameters and selection of the filler materials. In this investigation a results of the calculations and estimations for the repair welding parameters is based on the analytical equations. Analysis is performed to obtaining optimal parameters for sound welded joint with optimal quality and mechanical properties without PWHT of the joint. Also, calculations of the weld metal strength are performed on the base of previously defined welding parameters for the filler metal similar to base metal.",
publisher = "DUZS - Društvo za unapređivanje zavarivanja u Srbiji, Beograd",
journal = "Zavarivanje i zavarene konstrukcije",
title = "Predviđanje optimalnih parametara interventnog reparaturnog zavarivanja čelika 13CrMo4-5 analitičkim metodama, Optimal parameters estimation by the analytical methods for the emergency repair welding of the 13CrMo4-5 steel",
pages = "96-91",
number = "3",
volume = "55",
url = "https://hdl.handle.net/21.15107/rcub_rims_114"
}

Katavić, B., Jegdić, B., Odanović, Z., Hut, N., Mladenović, M., Jaković, D.,& Ristivojević, M.. (2010). Predviđanje optimalnih parametara interventnog reparaturnog zavarivanja čelika 13CrMo4-5 analitičkim metodama. in Zavarivanje i zavarene konstrukcije
DUZS - Društvo za unapređivanje zavarivanja u Srbiji, Beograd., 55(3), 91-96.
https://hdl.handle.net/21.15107/rcub_rims_114

Katavić B, Jegdić B, Odanović Z, Hut N, Mladenović M, Jaković D, Ristivojević M. Predviđanje optimalnih parametara interventnog reparaturnog zavarivanja čelika 13CrMo4-5 analitičkim metodama. in Zavarivanje i zavarene konstrukcije. 2010;55(3):91-96.
https://hdl.handle.net/21.15107/rcub_rims_114 .

Katavić, Boris, Jegdić, Bore, Odanović, Zoran, Hut, Nenad, Mladenović, Mladen, Jaković, Dragan, Ristivojević, M., "Predviđanje optimalnih parametara interventnog reparaturnog zavarivanja čelika 13CrMo4-5 analitičkim metodama" in Zavarivanje i zavarene konstrukcije, 55, no. 3 (2010):91-96,
https://hdl.handle.net/21.15107/rcub_rims_114 .

TY  - JOUR
AU  - Katavić, Boris
AU  - Jegdić, Bore
AU  - Odanović, Zoran
AU  - Đurđević, Mile
AU  - Hut, Nenad
AU  - Mladenović, Mladen
AU  - Jaković, Dragan
PY  - 2009
UR  - http://rims.institutims.rs/handle/123456789/95
AB  - Čelik 13CrMo 4-5 (~Č7400) već dugi niz godina se primenjuje za izradu delova termoenergetskih postrojenja kao što su elementi kotlova i cevi. On spada u grupu niskolegiranih konstrukcionih čelika za rad na povišenim temperaturama do 600°C. Čelik 13CrMo 4-5 pripada grupi uslovno zavarljivih čelika, koji mogu uspešno da se zavaruju uz primenu posebnih mera, kao što su predgrevanje, termička obrada nakon zavarivanja i drugih mera predostrožnosti, a zavaruje se sa dodatnim materijalima sličnog hemijskog sastava. U ovom radu je izvršena procena zavarljivosti osnovnog materijala na osnovu analitičkih jednačina i izvršena su ispitivanja na osnovu tehnoloških proba osetljivosti na pojavu prslina (Y i CTS). Kao dodatni materijali u ispitivanjima su korišćene elektrode sličnog hemijskog sastava (Castolin 71D) i austenitne elektrode na bazi nikla (Castolin 2222 Xuper Nucleo Tec). Dobijeni preliminarni rezultati ukazuju, da u slučajevima interventnih popravki zavarivanjem bez dodatne termičke obrade, ne treba koristiti klasične dodatne materijale, zbog mogućnosti pojave prslina u zavarenom spoju, osim u slučaju primene tehnologije sa kontrolisanim unosom toplote, kao i da bi se za interventna zavarivanja mogle koristiti elektrode na bazi nikla, u ovom slučaju Castolin 2222 Xuper Nucleo Tec.
AB  - Over the years steel 13CrMo 4-5 (~Č7400) is applied for production of the parts as pressure vessels and pipes in thermo energetic plants. This steel is from the group of the low alloyed constructional steels for application on elevated temperatures up to 600°C. Steel 13CrMo 4-5 is conditionally weldable steel and could be successfully welded with the special care and application of preheating, post weld heat treating and other precautionary measures. It is usually welded with similar filler material. In consideration to specific application, at repair welding special care have to be taken in defining weld process parameters and selection of filler materials. In this investigations a estimation of the weldability of the steel 13CrMo 4-5 is performed on the base of the analytical equations and technological tests for the crack sensitivities (Y and CTS tests). As filler material a electrodes with similar chemical composition (Castolin 71D) and austenite nickel based alloy (Castolin 2222 Xuper Nucleo Tec) were used. Preliminary results has shown that in case of the emergency repair welding with similar filler material without PWHT, a cracks could be formed in welded joint and application of the controlled deposition method have to be applied. Also, a filler material based on nickel as Castolin 2222 Xuper Nucleo Tec, could be applied.
PB  - DUZS - Društvo za unapređivanje zavarivanja u Srbiji, Beograd
T2  - Zavarivanje i zavarene konstrukcije
T1  - Analitička procena mogućnosti primene interventnog reparaturnog zavarivanja čelika 13CrMo 4-5
T1  - Analytical estimation of the application potentials for the emergency repair welding of the 13CrMo 4-5 steel
EP  - 155
IS  - 4
SP  - 149
VL  - 54
UR  - https://hdl.handle.net/21.15107/rcub_rims_95
ER  - 

@article{
author = "Katavić, Boris and Jegdić, Bore and Odanović, Zoran and Đurđević, Mile and Hut, Nenad and Mladenović, Mladen and Jaković, Dragan",
year = "2009",
abstract = "Čelik 13CrMo 4-5 (~Č7400) već dugi niz godina se primenjuje za izradu delova termoenergetskih postrojenja kao što su elementi kotlova i cevi. On spada u grupu niskolegiranih konstrukcionih čelika za rad na povišenim temperaturama do 600°C. Čelik 13CrMo 4-5 pripada grupi uslovno zavarljivih čelika, koji mogu uspešno da se zavaruju uz primenu posebnih mera, kao što su predgrevanje, termička obrada nakon zavarivanja i drugih mera predostrožnosti, a zavaruje se sa dodatnim materijalima sličnog hemijskog sastava. U ovom radu je izvršena procena zavarljivosti osnovnog materijala na osnovu analitičkih jednačina i izvršena su ispitivanja na osnovu tehnoloških proba osetljivosti na pojavu prslina (Y i CTS). Kao dodatni materijali u ispitivanjima su korišćene elektrode sličnog hemijskog sastava (Castolin 71D) i austenitne elektrode na bazi nikla (Castolin 2222 Xuper Nucleo Tec). Dobijeni preliminarni rezultati ukazuju, da u slučajevima interventnih popravki zavarivanjem bez dodatne termičke obrade, ne treba koristiti klasične dodatne materijale, zbog mogućnosti pojave prslina u zavarenom spoju, osim u slučaju primene tehnologije sa kontrolisanim unosom toplote, kao i da bi se za interventna zavarivanja mogle koristiti elektrode na bazi nikla, u ovom slučaju Castolin 2222 Xuper Nucleo Tec., Over the years steel 13CrMo 4-5 (~Č7400) is applied for production of the parts as pressure vessels and pipes in thermo energetic plants. This steel is from the group of the low alloyed constructional steels for application on elevated temperatures up to 600°C. Steel 13CrMo 4-5 is conditionally weldable steel and could be successfully welded with the special care and application of preheating, post weld heat treating and other precautionary measures. It is usually welded with similar filler material. In consideration to specific application, at repair welding special care have to be taken in defining weld process parameters and selection of filler materials. In this investigations a estimation of the weldability of the steel 13CrMo 4-5 is performed on the base of the analytical equations and technological tests for the crack sensitivities (Y and CTS tests). As filler material a electrodes with similar chemical composition (Castolin 71D) and austenite nickel based alloy (Castolin 2222 Xuper Nucleo Tec) were used. Preliminary results has shown that in case of the emergency repair welding with similar filler material without PWHT, a cracks could be formed in welded joint and application of the controlled deposition method have to be applied. Also, a filler material based on nickel as Castolin 2222 Xuper Nucleo Tec, could be applied.",
publisher = "DUZS - Društvo za unapređivanje zavarivanja u Srbiji, Beograd",
journal = "Zavarivanje i zavarene konstrukcije",
title = "Analitička procena mogućnosti primene interventnog reparaturnog zavarivanja čelika 13CrMo 4-5, Analytical estimation of the application potentials for the emergency repair welding of the 13CrMo 4-5 steel",
pages = "155-149",
number = "4",
volume = "54",
url = "https://hdl.handle.net/21.15107/rcub_rims_95"
}

Katavić, B., Jegdić, B., Odanović, Z., Đurđević, M., Hut, N., Mladenović, M.,& Jaković, D.. (2009). Analitička procena mogućnosti primene interventnog reparaturnog zavarivanja čelika 13CrMo 4-5. in Zavarivanje i zavarene konstrukcije
DUZS - Društvo za unapređivanje zavarivanja u Srbiji, Beograd., 54(4), 149-155.
https://hdl.handle.net/21.15107/rcub_rims_95

Katavić B, Jegdić B, Odanović Z, Đurđević M, Hut N, Mladenović M, Jaković D. Analitička procena mogućnosti primene interventnog reparaturnog zavarivanja čelika 13CrMo 4-5. in Zavarivanje i zavarene konstrukcije. 2009;54(4):149-155.
https://hdl.handle.net/21.15107/rcub_rims_95 .

Katavić, Boris, Jegdić, Bore, Odanović, Zoran, Đurđević, Mile, Hut, Nenad, Mladenović, Mladen, Jaković, Dragan, "Analitička procena mogućnosti primene interventnog reparaturnog zavarivanja čelika 13CrMo 4-5" in Zavarivanje i zavarene konstrukcije, 54, no. 4 (2009):149-155,
https://hdl.handle.net/21.15107/rcub_rims_95 .

TY  - JOUR
AU  - Odanović, Zoran
AU  - Grabulov, Vencislav
AU  - Katavić, Boris
PY  - 2008
UR  - http://rims.institutims.rs/handle/123456789/82
AB  - Višeslojni metalni materijali su nastali kao rezultat specifičnih potreba ili sa ciljem dobijanja kvalitetnog, a jeftinijeg materijala. Posebnu grupu čine višeslojni čelici, koji su našli primenu za izradu sečiva u grafičkoj industriji, u hemijskoj industriji za izradu delova postrojenja, kao i u vojnoj industriji. O problematici zavarivanja višeslojnih čelika ima relativno malo podataka i oni se uglavnom odnose na zavarivanje kombinacije višeslojnih niskolegiranih i nerđajućih čelika, dok o zavarivanju višeslojnih čelika visoke čvrstoće skoro i da nema raspoloživih podataka. U radu su prikazani rezultati istraživanja sa ciljem osvajanja tehnologije zavarivanja dvoslojnih čelika visoke čvrstoće i dobijanja kvalitetnog zavarenog spoja sa optimalnim mehaničkim i strukturnim osobinama. Ispitivanja su vršena na dvoslojnim čelicima, debljina 8 i 11mm, tvrdoća 60 i 45 HRc, sa odnosom debljina tvrdog i plastičnog dela 40:60. U okviru obavljenih istraživanja definisani su optimalni parametri elektrolučnog zavarivanja i dodatni materijal i izvršena je strukturno mehanička karakterizacija zavarenih spojeva.
AB  - Multi layer metal materials, are developed as a result of specific requirements or/and to obtain lower price metal material with high performances. Special group of multilayer materials are multilayer steels which are applied for cutters in graphical industry, in chemical industry for process equipment and for military purposes. Process data about technologies for welding of multilayer steels, are very exceptional in literature. Most data are treated welding of clad carbon steels with stainless steel. For welding high strength dual hardness steels, technology data practicality not exists in literature. In the paper are presented results of investigation of welding technologies development for high strength dual hardness steels with aim to obtain high quality welded joint with optimal mechanical and structural properties. Investigations were performed on two layer steel plates of 8 and 11 mm in thickness, with dual hardness of 60 and 45 HRc and thickness ratio of 40:60. The optimal welding parameters for arc welding process were defined. Testing of mechanical and structural properties of welded joint was performed.
PB  - DUZS - Društvo za unapređivanje zavarivanja u Srbiji, Beograd
T2  - Zavarivanje i zavarene konstrukcije
T1  - Osvajanje tehnologije zavarivanja dvoslojnih Cr-Mo-Ni čelika visoke čvrstoće
T1  - Development of welding technology for high strength dual hardness Cr-Mo-Ni steel
EP  - 110
IS  - 3
SP  - 105
VL  - 53
UR  - https://hdl.handle.net/21.15107/rcub_rims_82
ER  - 

@article{
author = "Odanović, Zoran and Grabulov, Vencislav and Katavić, Boris",
year = "2008",
abstract = "Višeslojni metalni materijali su nastali kao rezultat specifičnih potreba ili sa ciljem dobijanja kvalitetnog, a jeftinijeg materijala. Posebnu grupu čine višeslojni čelici, koji su našli primenu za izradu sečiva u grafičkoj industriji, u hemijskoj industriji za izradu delova postrojenja, kao i u vojnoj industriji. O problematici zavarivanja višeslojnih čelika ima relativno malo podataka i oni se uglavnom odnose na zavarivanje kombinacije višeslojnih niskolegiranih i nerđajućih čelika, dok o zavarivanju višeslojnih čelika visoke čvrstoće skoro i da nema raspoloživih podataka. U radu su prikazani rezultati istraživanja sa ciljem osvajanja tehnologije zavarivanja dvoslojnih čelika visoke čvrstoće i dobijanja kvalitetnog zavarenog spoja sa optimalnim mehaničkim i strukturnim osobinama. Ispitivanja su vršena na dvoslojnim čelicima, debljina 8 i 11mm, tvrdoća 60 i 45 HRc, sa odnosom debljina tvrdog i plastičnog dela 40:60. U okviru obavljenih istraživanja definisani su optimalni parametri elektrolučnog zavarivanja i dodatni materijal i izvršena je strukturno mehanička karakterizacija zavarenih spojeva., Multi layer metal materials, are developed as a result of specific requirements or/and to obtain lower price metal material with high performances. Special group of multilayer materials are multilayer steels which are applied for cutters in graphical industry, in chemical industry for process equipment and for military purposes. Process data about technologies for welding of multilayer steels, are very exceptional in literature. Most data are treated welding of clad carbon steels with stainless steel. For welding high strength dual hardness steels, technology data practicality not exists in literature. In the paper are presented results of investigation of welding technologies development for high strength dual hardness steels with aim to obtain high quality welded joint with optimal mechanical and structural properties. Investigations were performed on two layer steel plates of 8 and 11 mm in thickness, with dual hardness of 60 and 45 HRc and thickness ratio of 40:60. The optimal welding parameters for arc welding process were defined. Testing of mechanical and structural properties of welded joint was performed.",
publisher = "DUZS - Društvo za unapređivanje zavarivanja u Srbiji, Beograd",
journal = "Zavarivanje i zavarene konstrukcije",
title = "Osvajanje tehnologije zavarivanja dvoslojnih Cr-Mo-Ni čelika visoke čvrstoće, Development of welding technology for high strength dual hardness Cr-Mo-Ni steel",
pages = "110-105",
number = "3",
volume = "53",
url = "https://hdl.handle.net/21.15107/rcub_rims_82"
}

Odanović, Z., Grabulov, V.,& Katavić, B.. (2008). Osvajanje tehnologije zavarivanja dvoslojnih Cr-Mo-Ni čelika visoke čvrstoće. in Zavarivanje i zavarene konstrukcije
DUZS - Društvo za unapređivanje zavarivanja u Srbiji, Beograd., 53(3), 105-110.
https://hdl.handle.net/21.15107/rcub_rims_82

Odanović Z, Grabulov V, Katavić B. Osvajanje tehnologije zavarivanja dvoslojnih Cr-Mo-Ni čelika visoke čvrstoće. in Zavarivanje i zavarene konstrukcije. 2008;53(3):105-110.
https://hdl.handle.net/21.15107/rcub_rims_82 .

Odanović, Zoran, Grabulov, Vencislav, Katavić, Boris, "Osvajanje tehnologije zavarivanja dvoslojnih Cr-Mo-Ni čelika visoke čvrstoće" in Zavarivanje i zavarene konstrukcije, 53, no. 3 (2008):105-110,
https://hdl.handle.net/21.15107/rcub_rims_82 .

TY  - JOUR
AU  - Grabulov, Vencislav
AU  - Odanović, Zoran
AU  - Katavić, Boris
AU  - Momčilović, Saša
AU  - Tasić, Boban
PY  - 2008
UR  - http://rims.institutims.rs/handle/123456789/77
AB  - U ovom radu prikazano je istraživanje u cilju određivanja optimalnih parametara reparaturnog navarivanja diska radnog kola mlina za ugalj u termoelektrani, koji je oštećen abrazijom. Reparatura je izvedena na radnom kolu, bez njegove demontaže na sastavne delove kao što su disk, prsten i udarne ploče. Prečnik radnog kola je θ 4100 mm, a težina 23 tone. Odlivak diska radnog kola je izrađen od čelika GS17CrMo55, koji spada u grupu uslovno zavarljivih čelika, koji mogu uspešno da se zavaruju uz primenu posebnih dodatnih materijala, predgrevanja i drugih mera predostrožnosti. Iz tih razloga izvršena je anlitička procena zavarljivosti, ispitivanja na osnovu tehnoloških proba i izvedeno nekoliko serija probnih navarivanja CrMo čeličnog liva sa različitim uslovima navarivanja i termičke obrade. Na osnovu ovih ispitivanja izvedena je analiza uticaja primene različitih postupaka i uslova navarivanja, dodatnih materijala, kao i različitih uslova termičke obrade pre i posle zavarivanja na strukturno - mehaničke osobine CrMo liva. Rezultati analize omogućili su izbor optimalnih parametara navarivanja i izvođenje reparaturnog navarivanja diska radnog kola mlina za ugalj. Rezultati merenja tvrdoće i IBR-a potvrdila su zadovoljavajući kvalitet reparaturnog navarivanja diska.
AB  - In the paper the details of the investigation of the optimal parameters for repair welding of abrasive damaged working wheel of the coal mill are presented. Repair was performed without disassemble of the wheel. Diameter of the wheel was θ 4100 mm, and a weight was approximately 23 tons. The wheel was made of the cast steel GS17CrMo55. As the weld ability of this steel is limited, weld ability analysis of the base material by the analytical equations was performed and a series of trial welds with different welding and thermal conditions were done. The effects of the different welding processes and parameters, different filler materials and different preheating and post weld heat treatment conditions on hardness and macro and micro structure were analyzed. The Y probe was used for sensitivity testing to crack forming. Based on obtained results, the optimal welding parameters were selected, and the repair welding of the wheel was performed. Hardness measurement and NDT testing were verified quality of the applied repair welding.
PB  - DUZS - Društvo za unapređivanje zavarivanja u Srbiji, Beograd
T2  - Zavarivanje i zavarene konstrukcije
T1  - Reparaturno zavarivanje diska radnog kola mlina za ugalj od Cr-Mo čelika
T1  - Repair welding of the coal mill disk made of Cr-Mo steel
EP  - 157
IS  - 4
SP  - 147
VL  - 53
UR  - https://hdl.handle.net/21.15107/rcub_rims_77
ER  - 

@article{
author = "Grabulov, Vencislav and Odanović, Zoran and Katavić, Boris and Momčilović, Saša and Tasić, Boban",
year = "2008",
abstract = "U ovom radu prikazano je istraživanje u cilju određivanja optimalnih parametara reparaturnog navarivanja diska radnog kola mlina za ugalj u termoelektrani, koji je oštećen abrazijom. Reparatura je izvedena na radnom kolu, bez njegove demontaže na sastavne delove kao što su disk, prsten i udarne ploče. Prečnik radnog kola je θ 4100 mm, a težina 23 tone. Odlivak diska radnog kola je izrađen od čelika GS17CrMo55, koji spada u grupu uslovno zavarljivih čelika, koji mogu uspešno da se zavaruju uz primenu posebnih dodatnih materijala, predgrevanja i drugih mera predostrožnosti. Iz tih razloga izvršena je anlitička procena zavarljivosti, ispitivanja na osnovu tehnoloških proba i izvedeno nekoliko serija probnih navarivanja CrMo čeličnog liva sa različitim uslovima navarivanja i termičke obrade. Na osnovu ovih ispitivanja izvedena je analiza uticaja primene različitih postupaka i uslova navarivanja, dodatnih materijala, kao i različitih uslova termičke obrade pre i posle zavarivanja na strukturno - mehaničke osobine CrMo liva. Rezultati analize omogućili su izbor optimalnih parametara navarivanja i izvođenje reparaturnog navarivanja diska radnog kola mlina za ugalj. Rezultati merenja tvrdoće i IBR-a potvrdila su zadovoljavajući kvalitet reparaturnog navarivanja diska., In the paper the details of the investigation of the optimal parameters for repair welding of abrasive damaged working wheel of the coal mill are presented. Repair was performed without disassemble of the wheel. Diameter of the wheel was θ 4100 mm, and a weight was approximately 23 tons. The wheel was made of the cast steel GS17CrMo55. As the weld ability of this steel is limited, weld ability analysis of the base material by the analytical equations was performed and a series of trial welds with different welding and thermal conditions were done. The effects of the different welding processes and parameters, different filler materials and different preheating and post weld heat treatment conditions on hardness and macro and micro structure were analyzed. The Y probe was used for sensitivity testing to crack forming. Based on obtained results, the optimal welding parameters were selected, and the repair welding of the wheel was performed. Hardness measurement and NDT testing were verified quality of the applied repair welding.",
publisher = "DUZS - Društvo za unapređivanje zavarivanja u Srbiji, Beograd",
journal = "Zavarivanje i zavarene konstrukcije",
title = "Reparaturno zavarivanje diska radnog kola mlina za ugalj od Cr-Mo čelika, Repair welding of the coal mill disk made of Cr-Mo steel",
pages = "157-147",
number = "4",
volume = "53",
url = "https://hdl.handle.net/21.15107/rcub_rims_77"
}

Grabulov, V., Odanović, Z., Katavić, B., Momčilović, S.,& Tasić, B.. (2008). Reparaturno zavarivanje diska radnog kola mlina za ugalj od Cr-Mo čelika. in Zavarivanje i zavarene konstrukcije
DUZS - Društvo za unapređivanje zavarivanja u Srbiji, Beograd., 53(4), 147-157.
https://hdl.handle.net/21.15107/rcub_rims_77

Grabulov V, Odanović Z, Katavić B, Momčilović S, Tasić B. Reparaturno zavarivanje diska radnog kola mlina za ugalj od Cr-Mo čelika. in Zavarivanje i zavarene konstrukcije. 2008;53(4):147-157.
https://hdl.handle.net/21.15107/rcub_rims_77 .

Grabulov, Vencislav, Odanović, Zoran, Katavić, Boris, Momčilović, Saša, Tasić, Boban, "Reparaturno zavarivanje diska radnog kola mlina za ugalj od Cr-Mo čelika" in Zavarivanje i zavarene konstrukcije, 53, no. 4 (2008):147-157,
https://hdl.handle.net/21.15107/rcub_rims_77 .