摘要
M2AI和M2高速钢经一次和二次淬火后,奥氏体晶粒和未溶碳化物的定量研究表明,在高温r/f比值相同的条件下,由于淬火前原始组织的差别,可发生正常(均匀)和异常(非均匀)两类长大。根据异常粗晶形成初期的组织观察,提出了“连续-非连续”再结晶模式和“合并—推移”式的生长机制。提出了减轻或消除M2AI钢混晶的工艺原则。
The quantitative analysis on austenitic grain size and undisolved carbide of M2A1 and M2 high speed steels undergone once and twice quenching indicated that two types of growth, i.e. the normal (homogenious) and abnormal (hetogenious) growth happened upon the same condition of r/f ratio at high temperature depending on initial structure before quenching. A 'continious-disco-tinious' recrystallization model and a 'merge-migration' growth mechanism had been proposed based on the structure abservations in the beginning of abnormal coasening. Therefore the technical priciples for reducing or eliminating the mixed grain tendency of M2A1 steel was provided.
出处
《北京科技大学学报》
EI
CAS
CSCD
北大核心
1991年第5期426-432,共7页
Journal of University of Science and Technology Beijing
关键词
高速钢
奥氏体
晶粒长大
混晶
high speed steel, -grain growth, mixed grain, austenite
