摘要
利用液氮对M2高速钢淬火后的试样进行多次循环深冷处理,然后利用X射线衍射仪(XRD)和透射电镜分析了试样经深冷处理前后的相结构及组织变化,并采用洛氏硬度计和球盘摩擦磨损试验测试了试样处理前后的硬度及耐磨性。研究表明,深冷处理可以降低M2钢淬火后残余奥氏体的含量,随深冷次数的增加,残余奥氏体含量逐渐下降,但降幅逐渐减弱,深冷处理后试样硬度明显提高,增幅最大达到4.5 HRC,磨损率下降幅度最高达到39.5%。
The quenched M2 high speed steel was treated by liquid nitrogen. Phase and microstructure of the treated samples were analyzed by XRD and TEM. Hardness and wear properties of the samples before and after wear tested treatment by Rockwell hardness tester and wear tester. The results show that cryogenic treatment can promote martensite transformation.Proportion of retained austenite declines as the treatment numbers increasing. After treatment,hardness of the samples improves as high as 4.5 HRC,wear rate decreases about 39.5%.
出处
《热加工工艺》
CSCD
北大核心
2015年第18期211-213,共3页
Hot Working Technology
基金
上海市教委大学生创新活动计划资助项目(cs1305001)
关键词
M2
高速钢
循环深冷处理
残余奥氏体
M2 high speed steel
repeated cryogenic treated
retained austenite
