摘要
高 ＣｏＮｉ超高强度合金钢是典型的淬火回火马氏体钢，等温回火处理产生的针状合金碳化物沉淀即二次硬化反应使材料达到高的强韧性．针状合金碳化物 Ｍ２Ｃ从马氏体基体ａ－Ｆｅ中以共格形态析出，该共格关系随过时效而失去回火温度较高时 Ｍ２Ｃ转化为稳定的合金碳化物 Ｍ２３Ｃ６和 Ｍ７Ｃ３．
High Co-Ni alloy steel is a typical aging martensitic steel, and its superior performance can be achieved by precipitation of fine carbides during isothermal tempering. The needle-like carbides precipitated in the coherent way with martensite matrix, and this coherent relationship will be lost when overaged. With coursing of needle-like carbide M2C, it changed into cubic carbides Of M23C6, and the precipitating granular shaped carbide M7C3 promoted M2C dissolution. The crystal structures of all the probable kinds of precipitating carbides were determined by micro-diffraction.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2001年第4期381-385,共5页
Acta Metallurgica Sinica
基金
国家九五科技攻关资助项目 97060900
关键词
合金钢
二次硬化
合金碳化物
回火
钴
镍
high CoNi alloy steel
secondary hardening
carbide
tempering
