论文名称：电子束熔炼对高速钢碳化物的影响
发表刊物：Iron and Steel
卷号：56
期号：3
页面范围：103-110
ISSN号：0449-749X
关键字："electron beam melting; M35 high-speed steel; carbide; high temperature heat treatment; complex alloy composition"
摘要：The fine and dispersed carbides are the guarantee of the excellent performance of high-speed steel, but the complex alloy composition leads to coarse carbides and severe segregation in the as-cast high-speed steel. In order to explore the effect of electron beam melting on as-cast high-speed steel and improve the structure and carbide state of high-speed steel, electron beam melting technology to prepare M35 high-speed steel and characterize its composition and structure was used. The results show that the average dendrite spacing in EBM-M35 high-speed steel is 20 mum, the size of carbides is fine, and they are evenly distributed in the structure. The main types are MC and M2C, and the M2C carbides change from lamellar to fibrous. During heat treatment of as-cast EBM-M35 high-speed steel, it was found that the carbide fractured and spheroidized after being kept at 1 180 ℃ for 30 min to achieve the effect of refining the carbide and dispersing the carbide in the structure. Furthermore, the fracture and spheroidization of carbides in EBM-M35 high-speed steel can be completed at a lower temperature or shorter heat treatment time, and the microstructure optimization of as-cast high-speed steel can be completed at a lower cost. It provides a more excellent basis for the deformation and refinement of as-cast high-speed steel.
备注：新增回溯数据
发表时间：2021-01-01