摘要
研究了ＳｉＭｎＣｒ钢和ＳｉＭｎＭｏ钢低温回火过程中机械性能的变化。稀土对低温回火时的材料强度没有明显的影响。ＳｉＭｎＣｒ钢和ＳｉＭｎＭｏ钢分别在３５０和４００℃存在ＴＭＥ谷底值；稀土对谷底值的温度虽然没有影响，却可以在一定程度上改善其数值。稀土改善回火脆性是细化晶粒和抑制奥氏体晶界脆化作用的结果。
he mechanical properties of SiMnCr and SiMnMo steels tempered in lowtemperature range were studied. The results show that there is no obvious effect of rare earth element(RE) on material strength during lowtemperature tempering. There are the troughs of tempered martensite embrittlement(TME) at 350 and 400 ℃, respectively corresponding to SiMnCr and SiMnMo steels. RE can improve TEM troughs to some extent by refining grains and restraining embrittlement of austenite grain boundary, although it does not change TME temperature.
出处
《中国稀土学报》
CAS
CSCD
北大核心
1997年第4期330-333,共4页
Journal of the Chinese Society of Rare Earths
关键词
稀土
回火脆性
结构钢
硅锰铬
硅锰钼
Rare earths, Tempered martensite embrittlement, Structure steel
