摘要
通过对不同热处理状态下的42CrMo合金结构钢的硬度测定和显微组织观察,分析了热处理工艺对合金硬度的影响。结果表明,细杆高频淬火后近表面硬度为689.4 HV1.0,淬硬层平均硬度为434.6 HV0.1;回火后淬硬层平均硬度略有降低;底座高频淬火后淬硬层厚度为1.16 mm,硬度为459.4 HV0.1,表面淬火+回火后淬硬层的厚度为0.96 mm,硬度为464.7 HV0.1。两种热处理工艺均能保证细杆和底座的淬硬层与基体之间形成缓降式硬度梯度过渡。
The effects of different heat treatments on the hardness of alloy constructional steel 42CrMo were studied through hardness and microstructure researches.The results show that the near surface hardness of slim bar with high-frequency hardening is 689.4 HV1.0.The average value of hardening zone is 434.6 HV0.1,which can decrease slightly after tempering.The hardening zone depth of the base is 1.16 mm and the average hardness is 459.4 HV0.1 with high-frequency hardening.After tempering,the hardening zone depth is 0.96 mm and the hardness is 464.7 HV0.1.The gradual hardness gradient can be observed in both slim bar and base with these two heat treatment processes.
出处
《热加工工艺》
CSCD
北大核心
2012年第10期219-221,共3页
Hot Working Technology
关键词
活塞杆
表面处理
淬硬层
硬度梯度
piston rod
surface treatment
hardening zone
hardness gradient
