TiB_(2)量对42CrMo齿轮钢表面感应熔覆Ni基涂层组织与性能的影响  

Surface Modification of 42CrMo Steel with TiB_(2)-Doped Ni60A Alloy Coatings

作　　者：陈伟东 曹晓锋 孙婷 崔玲 CHEN Weidong;CAO Xiaofeng;SUN Ting;CUI Ling(Chifeng Industrial Vocational Technology College,Chifeng 024000,China;School of Mechanical Engineering,Hebei University of Science and Technology,Shijiazhuang 050000,China;Beijing Tanghao Electric Power Engineering Technology Research co.LTD,Beijing 100052,China)

机构地区：[1]赤峰工业职业技术学院,内蒙古自治区赤峰024000 [2]河北科技大学机械工程学院,石家庄050000 [3]北京唐浩电力工程技术研究有限公司,北京100052

出　　处：《真空科学与技术学报》2021年第3期236-240,共5页Chinese Journal of Vacuum Science and Technology

基　　金：内蒙古自治区高等学校科学研究项目(NJZY19365)。

摘　　要：为了提高42CrMo钢表面Ni基涂层的耐磨性能,利用感应熔覆工艺处理42CrMo钢的表面制得了具有不同TiB_(2)含量的Ni基涂层,之后对该涂层实施了能谱、扫描电镜表征,同时对涂层硬度与耐磨性能进行了测试,比较了不同TiB_(2)含量的镍基涂层在组织形态和性能方面存在的差异性。研究结果表明:微观形貌截面区域的组成结构包括扩散转移带、基体层、涂层共三层。当涂层内含有的TiB_(2)比例到达15%时,熔覆涂层的组织尺寸达到最小状态。从外往内变化时涂层硬度逐渐降低,而且离扩散转移带的距离越小时对应的涂层硬度也越低。涂层磨损量也表现出了和摩擦系数相近的变化规律,都表现为随TiB_(2)添加量的增加出现单调降低的变化,在TiB_(2)添加量到达15%时,涂层磨损形貌中存在明显的麻坑和划痕。The surfaces of 42 CrMo steel, an automobile transmission-gear material, were modified with TiB_(2)-doped Ni60 A alloy coatings, deposited by high frequency induction cladding of the pre-covered layer of Ni60 A and TiB_(2) powders.The influence of the TiB_(2)-content on the microstructures and tribological behavior of the coatings was investigated with X-ray diffraction scanning electron microscopy, energy dispersive spectroscopy and conventional mechanical probes.The results show that the TiB_(2)-doping had a major impact.For example, as the TiB_(2)-content increased, the thickness of the diffusion and cladded layers increased, the top-down decreasing hardness distribution curve shifted up, maximizing at 15%(wt),and the wear-rate and friction coefficient decreased.The adhesive and abrasive wears were found to account for the wear mechanisms.

关 键 词：感应熔覆 镍基涂层 TiB_(2) 显微硬度 耐磨性 

分 类 号：TG174.44[金属学及工艺—金属表面处理]