Precipitation Behaviors of Carbides in High Speed Steel during ESR and Heat Treatment

Metals

Jing Li¹  Wei Liang¹  Jiawei Gao¹  Yang Liu¹  Yongfeng Qi¹  Chengjia Shang² 

[1] State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China;Yangjiang Branch, Guangdong Laboratory for Materials Science and Technology (Yangjiang Advanced Alloys Laboratory), Yangjiang 529500, China;

关键词: electroslag remelting;    carbide;    high speed steel;    solution treatment;    microstructure;   

DOI  :  10.3390/met11111781

来源: DOAJ

【 摘 要 】

The microstructure and carbides evolution of high-speed steel after electroslag remelting and solution treatment were studied. The thermodynamic precipitation mechanism of carbides in solid phase was discussed and the characteristic parameters of carbides in different processes were also investigated. The results show that there were large lamellar and fibrous Mo₂C and a small amount of VC in the ESR ingot. Mo₂C are metastable carbides, which can be decomposed into VC and Fe₂Mo₄C during the solution treatment. The average diameter of the carbides is reduced to 1.28 μm and the space distance is reduced to 3.23 μm after forging and hot rolling, which means carbides are completely spheroidal and dispersed in matrix.

【 授权许可】

Unknown