Effect of Boron and Carbon on the Surface-Alloyed Layers with Fe(15−x)MoTiBxMn2C (x = 0,1,2,3)-Based Covered Electrodes

• Published in: Journal of materials engineering and performance 2023-10, Vol.33 (22), p.12480-12493
• Main Authors: Recep, Hocaoğlu, Engin, Kocaman, Bülent, Kılınç, Şaduman, Şen, Uğur, ŞEN
• Format: Article
• Language: English
• Subjects: Characterization and Evaluation of Materials; Chemistry and Materials Science; Corrosion and Coatings; Engineering Design; Materials Science; Original Research Article; Quality Control; Reliability; Safety and Risk; Tribology
• ISSN: 1059-9495; 1544-1024
• DOI: 10.1007/s11665-023-08837-x

In this study, Fe (15−x) MoTiB x Mn 2 C (x = 0, 1, 2, 3)-based hardfacing electrodes were produced and coating process was carried out on a AISI 1010 steel substrate by arc welding method. The in-situ formed borides/carbides phases was detected in the microstructure. The presence of M(C,B) ( M = Ti, Mo ), M 3 B 2 ( M = Mo, Fe ), α-(Fe, Mo, Mn), α-(Fe, Mo, Mn) phases as major in the microstructure, and M 6 C ( M = Mo, Fe ), M 2,3 (C, B) ( M = Mo, Fe, Mn ) as minor phases were detected. There is a skeleton-type α-(FeMo,Mn) + M 6 C (Fe 3 Mo 3 C) eutectic structure in the microstructure of the boron-free coating. With the increase in boron ratio, M 3 B 2 phase started to form in the structure. The volume fraction of the M 2 B phase increased as well as the blocky M 3 B 2 phase in coatings containing 10 and 15 %at. boron. Also, it was determined that the hardness values ​​increased, the friction coefficient decreased, and the wear resistance increased with the increasing boron ratio as a result of the phases formed. Among the coated samples, the highest hardness value and the highest wear resistance were measured from the Fe 12 MoTiB 3 Mn 2 C-based coating.