激光功率对42CrMo钢激光熔覆层组织和摩擦磨损性能的影响

doi:10.13251/j.issn.0254-6051.2020.11.041

金属热处理 ›› 2020, Vol. 45 ›› Issue (11): 214-217.DOI: 10.13251/j.issn.0254-6051.2020.11.041

激光功率对42CrMo钢激光熔覆层组织和摩擦磨损性能的影响

韩基泰, 武美萍, 崔宸

江南大学机械工程学院, 江苏无锡 214122

收稿日期:2020-04-16 出版日期:2020-11-25 发布日期:2020-12-29
作者简介:韩基泰(1991—),男,博士研究生,主要研究方向为激光加工及表面改性工艺,E-mail:wmp116699@163.com
基金资助:
装备预研教育部联合基金(6141A0221)

Effect of laser power on microstructure and friction and wear properties of laser clad layer on 42CrMo steel

Han Jitai, Wu Meiping, Cui Chen

School of Mechanical Engineering, Jiangnan University, Wuxi Jiangsu 214122, China

Received:2020-04-16 Online:2020-11-25 Published:2020-12-29

摘要/Abstract

摘要： 利用摩擦磨损试验探究不同激光功率下42CrMo钢激光熔覆层的耐磨性,采用SEM和OM观察了试样摩擦磨损前后的熔覆层组织形貌。结果表明:42CrMo钢基体的摩擦因数较大,且在该摩擦磨损后出现了严重的脆性剥落现象,激光熔覆层可以提升42CrMo钢的耐磨损性能;当激光功率为1600 W时,摩擦因数可降低至0.28,熔覆层表面SEM形貌较为光滑,耐磨性优异,熔覆层组织中的晶粒细化均匀,主要表现为细小的等轴晶,组织较为致密,从而提高了熔覆层的耐磨损性能。

关键词: 激光熔覆, 钴基熔覆层, 耐磨损性能, 显微组织

Abstract: The wear resistance of the laser clad layer of 42CrMo steel under different laser powers was investigated by using friction and wear test, and the morphologies of the specimens before and after friction and wear were observed by using SEM and OM. The results show that the friction coefficient of 42CrMo steel substrate is larger, and severe brittle peeling is occurred after friction and wear, while the laser clad layer can improve the wear resistance of 42CrMo steel. When the laser power is 1600 W, the friction coefficient can be reduced to 0.28, and the clad layer has relatively smooth SEM surface morphologies with excellent wear resistance. Meanwhile, the clad layer microstructure is dense and mainly composed of uniform fine equiaxed grains caused by grain refinement, thereby improving the wear resistance of the clad layer.

Key words: laser cladding, cobalt-based clad layer, wear resistance, microstructure

中图分类号:

TG174.4

韩基泰, 武美萍, 崔宸. 激光功率对42CrMo钢激光熔覆层组织和摩擦磨损性能的影响[J]. 金属热处理, 2020, 45(11): 214-217.

Han Jitai, Wu Meiping, Cui Chen. Effect of laser power on microstructure and friction and wear properties of laser clad layer on 42CrMo steel[J]. Heat Treatment of Metals, 2020, 45(11): 214-217.

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激光功率对42CrMo钢激光熔覆层组织和摩擦磨损性能的影响

Effect of laser power on microstructure and friction and wear properties of laser clad layer on 42CrMo steel

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