激光强化40Cr合金钢表面磨损的实验研究  

A Study on Wear of Laser Hardening 40Cr Alloy Steel

作　　者：李建卫[1] 王宗英[1] 祝金兰[1] 杨平石[2] 

机构地区：[1]沈阳建筑工程学院机械工程系,辽宁沈阳110015 [2]沈阳大学基础部,辽宁沈阳110044

出　　处：《沈阳建筑工程学院学报（自然科学版）》2002年第3期223-225,共3页Journal of Shenyang Architectural and Civil Engineering University(Nature Science)

基　　金：辽宁省教育厅资助项目 (2 0 2 0 2 2 5 6 )

摘　　要：采用CO2 激光器在不同的激光强化参数下对 4 0Cr钢进行表面强化 ,并将其与热轧Q 2 35钢组成摩擦副 ,在干摩擦条件下进行摩擦磨损实验 ,旨在确定合理的激光强化参数 ,为提高矫直辊耐磨性提供实验依据 .通过对实验结果的定量分析得出 ,激光强化可以提高 4 0Cr钢的耐磨性 .采用扫描电镜对激光强化后的 4 0Cr钢表面和磨损表面进行分析 ,发现激光强化后 4 0Cr钢的金相组织主要是致密的马氏体 ,而且磨损表面比正常淬火的 4 0Cr钢的表面光滑 。The paper investigates transformation in surface hardening zone of 40Cr steel with CO 2 laser by different parameters. Experiments have been conducted with mated couple of Q235 and 40Cr steel under dry friction, in order to offer suitable laser processing parameters and the experimental foundation to enhance the wear resistance of straightening roller. The quantitative analysis of experimental results shows that wear resistance of 40Cr steel can be enhanced by laser hardening. The surface of 40Cr treated by laser and its worn surface are analyzed through SEM, showing that the organization of 40Cr steel treated by laser is mainly compact martensite. Moreover, its worn surface is smoother than that treated by quenching, and only a few minute fractures appear.

关 键 词：激光 表面强化 40CR钢 干摩擦 

分 类 号：TH117.1[机械工程—机械设计及理论]