TY  - JOUR
AU  - Maslarevic, Aleksandar
AU  - Bakic, Gordana
AU  - Đukić, Miloš B.
AU  - Rajicic, Bratislav
AU  - Maksimović, Vesna
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7722
AB  - Parts of industrial machines and structures are often exposed to the action of aggressive environments, which in a short period of time can provoke the loss of their integrity. It is well known that for extending the service life against erosion and corrosion, protection of the exposed structure zone by coating is frequently used. Various application methods of protective coatings are applied, and the most common are welding and thermal spraying processes. The aim of this study was characterization of coatings made of stainless steel 316L, widely used in chemical and petrochemical industries. The coating was applied on a structural steel S235JR by plasma transferred arc using powder as a filler material. Due to a number of advantages, the plasma transferred arc (PTA) surfacing process has found significant usages in the field of surface protection. This paper presents results of hardness measurements in characteristic zones of the coating and the base material, as well as microstructural characterization of coatings using optical and scanning electron microscopy. Results of EDS analysis of the coating and hardness measurements indicated that a relatively high dilution (26.1 %) of the base material (BM) and the filler material (FM) occurred in a very narrow zone above the fusion line, and thus did not significantly affect the chemical composition of the rest of the coating. Also, erosion resistance tests of coatings were performed by changing the basic functional parameters that is the impact angle and the speed of erodent particles. It was observed that the erosion resistance of the coating material decreases approximately linearly with the increase of the particle speed. Also, with the increase of the impact angle of the erodent (up to 45 °), the mass loss of the coating material is increased.
AB  - Delovi mašina i konstrukcija su tokom rada izloženi delovanju agresivne radne sredine koja u kratkom vremenskom periodu može da naruši njihov integritet. U zavisnosti od radnih uslova, površina materijala može da bude izložena raznim mehanizmima oštećenja, od kojih se izdvajaju eroziona i koroziona oštećenja. Produžetak radnog veka ugroženih zona mašinskih konstrukcija moguće je izvesti različitim postupcima nanošenja zaštitnih prevlaka, a najčešće su to različiti postupci navarivanja i metalizacije. Cilj ovog rada je karakterizacija prevlake izrađene od nerđajućeg čelika klase 316L, koja je našla široku primenu u hemijskoj i petrohemijskoj industriji, nanete plazma postupkom navarivanja korišćenjem dodatnog materijala u obliku praha, na konstrukcioni čelik S235JR. U radu je izvršeno merenje tvrdoće u karakterističnim zonama prevlake i osnovnog materijala, kao i mikrostrukturna karakterizacija prevlake na optičkom i skenirajućem elektronskom mikroskopu. Takođe, izvršeno je eroziono ispitivanje prevlake promenom parametara ispitivanja, pre svega ugla nastrujavanja i brzine čestica erodenta.
T2  - Hemijska industrija
T1  - Characterization of a coating 316L applied by plasma transferred arc
T1  - Karakterizacija prevlake 316L nanete postupkom plazma navarivanja
VL  - 72
IS  - 3
SP  - 139
EP  - 147
DO  - 10.2298/HEMIND170928005M
ER  - 

@article{
author = "Maslarevic, Aleksandar and Bakic, Gordana and Đukić, Miloš B. and Rajicic, Bratislav and Maksimović, Vesna",
year = "2018",
abstract = "Parts of industrial machines and structures are often exposed to the action of aggressive environments, which in a short period of time can provoke the loss of their integrity. It is well known that for extending the service life against erosion and corrosion, protection of the exposed structure zone by coating is frequently used. Various application methods of protective coatings are applied, and the most common are welding and thermal spraying processes. The aim of this study was characterization of coatings made of stainless steel 316L, widely used in chemical and petrochemical industries. The coating was applied on a structural steel S235JR by plasma transferred arc using powder as a filler material. Due to a number of advantages, the plasma transferred arc (PTA) surfacing process has found significant usages in the field of surface protection. This paper presents results of hardness measurements in characteristic zones of the coating and the base material, as well as microstructural characterization of coatings using optical and scanning electron microscopy. Results of EDS analysis of the coating and hardness measurements indicated that a relatively high dilution (26.1 %) of the base material (BM) and the filler material (FM) occurred in a very narrow zone above the fusion line, and thus did not significantly affect the chemical composition of the rest of the coating. Also, erosion resistance tests of coatings were performed by changing the basic functional parameters that is the impact angle and the speed of erodent particles. It was observed that the erosion resistance of the coating material decreases approximately linearly with the increase of the particle speed. Also, with the increase of the impact angle of the erodent (up to 45 °), the mass loss of the coating material is increased., Delovi mašina i konstrukcija su tokom rada izloženi delovanju agresivne radne sredine koja u kratkom vremenskom periodu može da naruši njihov integritet. U zavisnosti od radnih uslova, površina materijala može da bude izložena raznim mehanizmima oštećenja, od kojih se izdvajaju eroziona i koroziona oštećenja. Produžetak radnog veka ugroženih zona mašinskih konstrukcija moguće je izvesti različitim postupcima nanošenja zaštitnih prevlaka, a najčešće su to različiti postupci navarivanja i metalizacije. Cilj ovog rada je karakterizacija prevlake izrađene od nerđajućeg čelika klase 316L, koja je našla široku primenu u hemijskoj i petrohemijskoj industriji, nanete plazma postupkom navarivanja korišćenjem dodatnog materijala u obliku praha, na konstrukcioni čelik S235JR. U radu je izvršeno merenje tvrdoće u karakterističnim zonama prevlake i osnovnog materijala, kao i mikrostrukturna karakterizacija prevlake na optičkom i skenirajućem elektronskom mikroskopu. Takođe, izvršeno je eroziono ispitivanje prevlake promenom parametara ispitivanja, pre svega ugla nastrujavanja i brzine čestica erodenta.",
journal = "Hemijska industrija",
title = "Characterization of a coating 316L applied by plasma transferred arc, Karakterizacija prevlake 316L nanete postupkom plazma navarivanja",
volume = "72",
number = "3",
pages = "139-147",
doi = "10.2298/HEMIND170928005M"
}

Maslarevic, A., Bakic, G., Đukić, M. B., Rajicic, B.,& Maksimović, V.. (2018). Characterization of a coating 316L applied by plasma transferred arc. in Hemijska industrija, 72(3), 139-147.
https://doi.org/10.2298/HEMIND170928005M

Maslarevic A, Bakic G, Đukić MB, Rajicic B, Maksimović V. Characterization of a coating 316L applied by plasma transferred arc. in Hemijska industrija. 2018;72(3):139-147.
doi:10.2298/HEMIND170928005M .

Maslarevic, Aleksandar, Bakic, Gordana, Đukić, Miloš B., Rajicic, Bratislav, Maksimović, Vesna, "Characterization of a coating 316L applied by plasma transferred arc" in Hemijska industrija, 72, no. 3 (2018):139-147,
https://doi.org/10.2298/HEMIND170928005M . .

TY  - CONF
AU  - Bakic, Gordana M.
AU  - Đukić, Miloš B.
AU  - Rajicic, Bratislav
AU  - Zeravcic, Vera Sijacki
AU  - Maslarevic, Aleksandar
AU  - Radović, Miladin
AU  - Maksimović, Vesna
AU  - Milošević, Nenad Z.
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7149
AB  - The heat resistant tempered martensite ferritic steel X20CrMoV121 (DIN) has been extensively used within the last few decades as a material for boiler tubing systems and pipelines in thermal power plants (TPP). Long-term behavior of this steel is vastly researched and very well known, but main disadvantage is its poor weldability. In situ welding of martensitic steels is always challenging task and is usually quite difficult to implement properly in a short time, during forced outages of TPP. In this paper, characterization and mechanical properties of undermatch welded joint made during partial replacement of boiler outlet superheater (SH) in TPP by austenitic filler material, after 10 years of service are presented. Due to cold technique of welding, which does not required post weld heat treatment, this procedure were regular and widely used repair welding technique in two TPP (620 MW) units. In the purpose of comparison, two other type of matching welding joints of the same SH were also characterized: shop welded joint made by electrical resistance flash butt welding, as well as field welded joint made by gas tungsten arc welding during assembling of SH, which were both in service approximately 150,000 h.
T1  - Characterization of Tube Repair Weld in Thermal Power Plant Made of a 12% Cr Tempered Martensite Ferritic Steel
SP  - 151
EP  - 169
DO  - 10.1007/978-3-319-32634-4_8
ER  - 

@conference{
author = "Bakic, Gordana M. and Đukić, Miloš B. and Rajicic, Bratislav and Zeravcic, Vera Sijacki and Maslarevic, Aleksandar and Radović, Miladin and Maksimović, Vesna and Milošević, Nenad Z.",
year = "2017",
abstract = "The heat resistant tempered martensite ferritic steel X20CrMoV121 (DIN) has been extensively used within the last few decades as a material for boiler tubing systems and pipelines in thermal power plants (TPP). Long-term behavior of this steel is vastly researched and very well known, but main disadvantage is its poor weldability. In situ welding of martensitic steels is always challenging task and is usually quite difficult to implement properly in a short time, during forced outages of TPP. In this paper, characterization and mechanical properties of undermatch welded joint made during partial replacement of boiler outlet superheater (SH) in TPP by austenitic filler material, after 10 years of service are presented. Due to cold technique of welding, which does not required post weld heat treatment, this procedure were regular and widely used repair welding technique in two TPP (620 MW) units. In the purpose of comparison, two other type of matching welding joints of the same SH were also characterized: shop welded joint made by electrical resistance flash butt welding, as well as field welded joint made by gas tungsten arc welding during assembling of SH, which were both in service approximately 150,000 h.",
title = "Characterization of Tube Repair Weld in Thermal Power Plant Made of a 12% Cr Tempered Martensite Ferritic Steel",
pages = "151-169",
doi = "10.1007/978-3-319-32634-4_8"
}

Bakic, G. M., Đukić, M. B., Rajicic, B., Zeravcic, V. S., Maslarevic, A., Radović, M., Maksimović, V.,& Milošević, N. Z.. (2017). Characterization of Tube Repair Weld in Thermal Power Plant Made of a 12% Cr Tempered Martensite Ferritic Steel. , 151-169.
https://doi.org/10.1007/978-3-319-32634-4_8

Bakic GM, Đukić MB, Rajicic B, Zeravcic VS, Maslarevic A, Radović M, Maksimović V, Milošević NZ. Characterization of Tube Repair Weld in Thermal Power Plant Made of a 12% Cr Tempered Martensite Ferritic Steel. 2017;:151-169.
doi:10.1007/978-3-319-32634-4_8 .

Bakic, Gordana M., Đukić, Miloš B., Rajicic, Bratislav, Zeravcic, Vera Sijacki, Maslarevic, Aleksandar, Radović, Miladin, Maksimović, Vesna, Milošević, Nenad Z., "Characterization of Tube Repair Weld in Thermal Power Plant Made of a 12% Cr Tempered Martensite Ferritic Steel" (2017):151-169,
https://doi.org/10.1007/978-3-319-32634-4_8 . .