摘要
稀土、硼、稀土—硼加入 Si—Mn 铸钢能够细化铸态组织,遏制或消除针状和网状铁素体,并增加铁素体数量。经高温淬火低温回火,能改善马氏体的亚结构,增加回火碳化物数量,并在马氏体板条间出现残余奥氏体薄膜,从而改善 Si—Mn 铸钢(ZG31Mn2Si)的力学性能,尤其是韧性。
The addition of RE,B,or RE-B to Si-Mn cast steel may refine the as-cast microstructures,hinder or eliminate needle and network ferrite,and increase the quantity of ferrite.By using high temperature quenching and low temperature temping,the martensite substructures can be improved and the quantity of tempered carbides can be increased,at the same time the film of retained austenite appears between laths of matensite.Based on the aboved actions the mechanical properties of Si-Mn cast steel(ZG31Mn2Si)are improved,especially the improvement in toughness of the steel is more obvious.
出处
《洛阳工学院学报》
1997年第1期1-6,共6页
Journal of Luoyang Institute of Technology
基金
机械部攻关资助项目
关键词
马氏体钢
韧性
稀土
硼
铸钢
硅锰钢
Martensitic steels
Toughness
Rare earth series
Boron
