用场离子显微镜和原子探针研究23NiCo钢中M_2C的回火析出机制  

Study of M_2C Carbide Precipitation Mechanism during Tempering in 23NiCo Steel by AP-FIM

作　　者：赵振业[1] 凌斌[1] 钟平 钟炳文 

机构地区：[1]北京航空材料研究院,北京100095

出　　处：《金属热处理学报》2000年第2期14-23,共10页

基　　金：航空基础科学基金!资助 (94G2 10 30 )

摘　　要：研究了新型高合金超高强度钢 (2 3NiCo)中M2 C的回火析出机制。结果表明M2 C以非均匀形核方式析出 ,有两种形核机制 ,一种是自基体位错上直接析出 ,即单独形核 ;另一种是在渗碳体上形核 ,即原位形核。以单独形核机制析出的M2 C与基体高度共格 ;以原位形核机制析出的M2 C与基体非共格。The M 2C precipitation mechanisms during tempering of the ultra\|high strength alloy steel (23NiCo) were investigated. Two types of heterogeneous nucleation mechanism were observed. One is the separate nucleation at dislocations in matrix, the other in\|situ nucleation at Fe 3C. The M 2C precipitated by the former is coherency with matrix, but incoherency by the latter.

关 键 词：23NiCo钢 原子探针 回火析出机制 场离子显微镜 

分 类 号：V250.1[一般工业技术—材料科学与工程] V252.1[航空宇航科学与技术—航空宇航制造工程]