期刊论文

Microstructure and Properties of 40CrNiMoA Steel Surface After Laser Quenching

中文

激光与光电子学进展

1006-4125

2020

57

1

011405

10.3788/LOP57.011405

衡阳市科学技术发展计划项目（2018KJ170）；

本校为第一机构

采用光纤激光器对卷取机卷筒主轴常用的40CrNiMoA钢进行了激光淬火实验,采用金相显微镜观察试样表面的显微组织,采用维氏硬度计测试相变硬化层的显微硬度,采用立式万能摩擦磨损试验机评估试样的摩擦磨损性能,采用体视显微镜观察试样截面的宏观组织及磨损形貌,采用电化学工作站测试试样的耐蚀性能。结果表明:40CrNiMoA钢经激光淬火后,表面会出现一层相变硬化层,其显微组织主要为细小的马氏体、少量的残留奥氏体以及部分弥散的碳化物;硬化层深度约为200 μm,硬度值可达638.3~711.2 HV,约为基体的2.6~2.8倍;平均摩擦因数为0.506,与基体相比下降了42.5%,磨损量为1.3 mg,仅为基体的36.1%,其主要磨损机...

In this study, a laser-quenching experiment is conducted on the 40CrNiMoA steel base material of a reel spindle using a fiber laser. Further, the microstructure of sample surface is observed using a metallographic microscope, the microhardness of the phase-transformation hardening zone is evaluated using a Vickers hardness tester, and the friction and wear properties of the sample are evaluated using a vertical universal friction-and-wear tester. The macroscopic structure of the sample cross-section and morphology after wear are observed using ...