期刊论文

Effect of laser power on quenched microstructure and friction and wear properties of 40CrNiMoA steel

中文

金属热处理

0254-6051

2020

45

3

128-133

10.13251/j.issn.0254-6051.2020.03.025

衡阳市科学技术发展计划项目(2018KJ170)。

本校为第一机构

采用不同激光功率在卷取机卷筒主轴40CrNiMoA钢基材表面进行了激光淬火试验,利用体视显微镜、光学显微镜、显微硬度计和立式万能摩擦磨损试验机等观察和测试试样横截面的宏观组织、表面显微组织、激光相变硬化区的显微硬度和摩擦磨损性能。结果表明:3种不同功率下的激光淬火试样表层组织均得到不同程度的细化,其硬度、摩擦磨损性能较基体均有所提升。其中,当功率为1600 W时,在试样截面能够明显观察到相变硬化区。此时,试样的表层组织最为细致,由细小的针状马氏体、少量残留奥氏体和弥散分布的细小碳化物组成,其表面硬度可达640. 3～706. 8 HV0. 2,约为基体硬度的2. 8倍。同时,摩擦因数稳定在0. ...

The surface layer of the coiled spindle main shaft 40CrNiMoA steel base material was tested by laser-quenching with different power. The macroscopic structure of cross-section,surface microstructure,microhardness,and friction and wear properties of the specimens were observed or tested by means of stereo microscope,optical microscope,microhardness tester,vertical universal friction and wear tester. The results show that,the surface structure of the laser hardened specimens at different powers exhibit different levels of refining,and compared wi...