激光功率对440C钢表面淬火组织和性能的影响  

Effects of Laser Power on Quenched Microstructure and Properties of 440C Steel

作　　者：魏连坤 杜春燕[1] 赵晖[1] WEI Liankun;DU Chunyan;ZHAO Hui(School of Materials Science and Engineering,Shenyang University of Technology,Shenyang 110159,China)

机构地区：[1]沈阳理工大学材料科学与工程学院,辽宁沈阳110159

出　　处：《热加工工艺》2023年第16期146-149,158,共5页Hot Working Technology

基　　金：沈阳市科技计划项目(20-235-5-25)。

摘　　要：采用光纤激光器在440C钢表面制备淬火改性层,探究了不同激光功率对淬火组织演变、硬度、磨损性能和耐腐蚀性能的影响。结果表明:经过激光淬火后材料表面生成奥氏体和马氏体且组织细密,最大显微硬度可以达到650 HV,最大硬化深度为0.3 mm。随着功率的增加,摩擦系数下降,耐磨性能提升,自腐蚀电流密度下降,耐腐蚀性能提高。The quenching modified layer was prepared by fiber laser on the surface of 440C steel.The effects of different laser powers on the microstructure evolution,hardness,wear properties and corrosion resistance were investigated.The results show that austenite and martensite are formed on the surface of the material after laser quenching,and the microstructure is fine.The maximum microhardness can reach 650 HV,and the maximum hardening depth is 0.3 mm.With the increase of power,the friction coefficient decreases,the wear resistance improves,the self-corrosion current density decreases,and the corrosion resistance improves.

关 键 词：激光淬火 440C钢 显微硬度 耐腐蚀性 

分 类 号：TG156.33[金属学及工艺—热处理]