45#钢表面激光织构淬火减摩抗磨复合处理技术研究  

Research of Antifriction and Wear Resistance Composite Technology by Laser-texturing and Quenching on 45# Steel Surface

作　　者：华希俊[1] 刘凯[1] 周万[1] 符永宏[1] 王蓉[1] 孙建国[1] 

机构地区：[1]江苏大学机械工程学院,江苏镇江212013

出　　处：《表面技术》2014年第4期86-91,共6页Surface Technology

基　　金：国家自然科学基金(51375211;51175233);国家重大科技成果转化项目(2060403);江苏省科技支撑计划项目(BE2010060);镇江市工业科技支撑项目(GY2012039)~~

摘　　要：目的提高45#钢零件的表面硬度和润滑减摩性能。方法在45#钢试样表面进行激光淬火,研究激光功率和扫描速度对淬火表面淬硬层深度和宽度的影响,分析淬硬层不同区域的显微硬度和微观组织。利用二极管泵浦Nd:YAG激光加工机在45#钢光滑试样表面加工出具有一定分布规律的微凹坑织构,采用热压法向其中填入由MoS2、聚酰亚胺和石墨组成的复合固体润滑剂,并与未处理的光滑试样进行摩擦学性能对比。结果将激光织构与淬火技术有效融合,可以使45#钢表面硬度提高至835HV,摩擦系数减小约50%。结论激光织构淬火减摩抗磨复合处理技术能够提高45#钢零件的表面硬度,减小摩擦系数,具有很好的工程应用前景。Objective To improve the hardness and antifriction properties on 45# steel surface. Methods Laser quenching was performed on the 45# steel surface. The effects on the hardened depth and width of the quenched surface by laser powers and scanning speeds were studied. The micro-hardness and micro-structure were analyzed on the different parts of the hardened layer. Uniform-distributive micro-dimples were conducted on the smooth surface of 45# steel specimens by diode-pumped Nd：YAG laser ma-chine and MoS2-PI-Gr composite solid lubricants were filled into the texture by hot-pressing method, then tribological performance comparison with the untreated smooth 45# steel surface was carried out. Results The hardness of 45# steel surface could reach up to 835HV and the friction coefficient caould be reduced by almost 50% through laser-texturing and quenching composite technology. Conclusion The hardness of 45# steel surface could be increased and the friction coefficient could be reduced by laser-texturing and quenching composite technology, which would have a good engineering application prospect.

关 键 词：45#钢 激光淬火 微织构 固体润滑剂 

分 类 号：TG156.3[金属学及工艺—热处理]