Cr4Mo4V钢球的淬火混晶组织细化试验研究
Experimental Study on Refinement of Quenched Mixed Crystal Structure of Cr4Mo4V Steel Ball
曹彦文 1李臻 2邵家俊 1顾家铭 2闵永安1
作者信息
- 1. 上海大学 材料科学与工程学院 省部共建高品质特殊钢冶金与制备国家重点实验室,上海 200444
- 2. 上海天安轴承有限公司,上海 200233
- 折叠
摘要
对出现混晶组织的Cr4Mo4V淬回火钢球分别进行亚临界退火、等温退火处理,然后再经 1115℃淬火后观察晶粒改善情况.利用X射线衍射方法分析不同状态Cr4Mo4V试样的微观畸变;利用光镜、扫描电镜对比分析各试样中的二次碳化物形态与分布特点.结果表明,Cr4Mo4V钢球混晶组织有所改善,但晶粒依然粗大;中间退火并没有有效消除淬火粗晶的遗传现象.有迹象显示:粗晶的遗传与淬火未溶碳化物和再次淬火前组织中二次碳化物的方向性分布密切相关.
Abstract
Cr4Mo4V quenched and tempered steel balls with mixed crystal structure were treated with subcritical annealing and isothermal annealing respectively,and then the grain improvement was observed after quenching at 1115℃.The micro distortion of Cr4Mo4V samples in different states was analyzed by X-ray diffraction.The morphology and distribution of secondary carbides in each sample were compared and analyzed by light microscope and scanning electron microscope.The results show that the mixed grain structure of Cr4Mo4V steel ball is improved,but the grain is still coarse.Intermediate annealing does not effectively eliminate the genetic phenomenon of quenching coarse grain.There are indications that the inheritance of coarse grains is closely related to the directional distribution of quenched insoluble carbides and secondary carbides in the microstructure before re-quenching.
关键词
高温轴承钢/混晶/退火处理/二次碳化物Key words
high temperature bearing steel/mixed crystal/annealing treatment/secondary carbide引用本文复制引用
基金项目
省部共建高品质特殊钢冶金与制备国家重点实验室和上海市科委项目(19DZ2270200)
出版年
2024
NETL
NSTL
万方数据