硬切削白层对GCr15轴承钢表面摩擦磨损性能的影响  

Effect of White Layer Obtained by Hard Cutting on the Friction and Wear Performances of GCr15 Bearing Steel Surface

作　　者：邹翩 于爱兵[1] 吴其亮 王贵林 李克凡 吴森凯 ZOU Pian;YU Ai-bing;WU Qi-liang;WANG Gui-lin;LI Ke-fan;WU Sen-kai(Faculty of Mechanical Engineering and Mechanics,Ningbo University,Ningbo 315211,China)

机构地区：[1]宁波大学机械工程与力学学院,浙江宁波315211

出　　处：《材料保护》2022年第7期91-95,164,共6页Materials Protection

基　　金：国家自然科学基金(51875294);宁波市科技创新2025重大专项(2018B10006)资助。

摘　　要：为了研究硬切削白层对试件表面摩擦磨损性能的影响,采用聚晶立方氮化硼刀具对GCr15轴承钢进行硬切削,测试了白层硬度,使用销盘式摩擦磨损机对已切削试样和未切削试样进行摩擦磨损试验,采用扫描电镜观察了磨损表面。结果表明:与未切削试样表面相比,已切削试样表面会产生厚度为6μm的白层;马氏体的产生和晶粒的细化导致硬切削试件表面的硬度高于未切削试样表面;与未切削试样表面相比,含白层的已切削试样表面的摩擦系数更低,磨损量更小,硬切削试样表面的白层可改善其表面的摩擦磨损性能.In order to study the effect of the white layer obtained by hard cutting on the friction and wear performances of the specimen surface,the polycrystalline cubic boron nitride tool was used to cut the GCr15 bearing steel hardly.The hardness of the white layer was measured,and friction and wear tests of both hard-cutting specimen and uncut specimen were carried out using the pin-disk friction and wear machine.In addition,the wear surfaces were observed through scanning electron microscope.Results showed that compared with the uncut surface,a white layer with a thickness of 6μm was generated on the surface of the hard-cutting specimen.The surface hardness of the hard-cutting specimen was higher than that of the uncut specimen due to the formation of martensite and the grain refinement.Compared with the uncut surface,the hard-cutting surface with a white layer possessed a lower friction coefficient and abrasion loss.Therefore,the white layer on hard cutting surface could improve the friction and wear performances of the surface.

关 键 词：白层 硬切削 摩擦系数 磨损 

分 类 号：TG580.1[金属学及工艺—金属切削加工及机床]