基于镍基合金的截齿激光熔覆工艺与实验研究  

Laser Cladding Process and Experimental Study of Pick Based on Ni-based Alloy

作　　者：崔陆军[1] 于计划 郭士锐[1] 郭强[1] 杜虹[1] 曹衍龙[2] 张猛 Cui Lujun;Yu Jihua;Guo Shirui;Guo Qiang;Du Hong;Cao Yanlong;Zhang Meng(College of Mechanical and Electrical Engineering,Zhongyuan University of Technology,Henan University Precision Manufacturing Engineering Technology Research Center,Zhengzhou,Henan 450007;School of Mechanical Engineering,Zhejiang University,Zhejiang,Hangzhou 310058)

机构地区：[1]中原工学院机电学院河南省高校精密制造工程技术研究中心,河南郑州450007 [2]浙江大学机械工程学院,浙江杭州310058

出　　处：《应用激光》2018年第5期720-725,共6页Applied Laser

基　　金：国家自然科学基金资助项目(项目编号:51505506);河南省高等学校现代制造装备与仪器重点学科开放实验室开放课题资助项目(项目编号:2016MEI006);中原工学院自主创新应用研究资助项目(项目编号:K2018YY001);河南省高等学校青年骨干教师培养计划资助项目

摘　　要：为了提高矿用截齿的性能和延长截齿的寿命,实现截齿的激光熔覆批量加工。实验室搭建了用于批量激光熔覆截齿的硬件实验平台,设计了激光熔覆工艺流程,方案中采用半导体激光器在42CrMo基材上制备了高硬度,高耐磨性的镍基WC合金熔覆层,进行了该熔覆层的硬度、摩擦系数和厚度系列实验,进一步分析了硬度曲线图产生波动等的原因。实验结果可知,该实验设备和激光熔覆工艺适合于批量激光熔覆截齿,该熔覆层的硬度平均值可达691.96HV0.3,与基体硬度相比提高了2.93倍。熔覆层的摩擦系数在0.35左右,远低于基体摩擦系数0.55,熔覆层厚度达到2 289.31μm。基于镍基合金的激光熔覆设备及工艺,可用于矿用截齿的激光熔覆修复与强化,有效提升截齿的综合性能,降低企业的成本。In order to improve the performance of mining pick and prolong the life of pick, laser cladding hatch processing of pick is realized. A hardware experimental platform for batch laser cladding picks is built by laboratory, and a laser cladding process is designed. In the scheme, a high-hardness and high wear-resistance Ni-based WC alloy cladding layer is prepared on a 42CrMo substrate by a semiconductor laser. The series of hardness, friction coefficient and thickness of the cladding layer are tested, and the causes of fluctuations in the hardness curve are further analyzed. The experimental results show that the experi- mental equipment and the laser cladding process are suitable for batch laser cladding picks. The average hardness of the clad-ding layer can reach 691.96 HV0.3, which is 2.93 times higher than the hardness of the matrix. The friction coefficient of the cladding layer is about 0.35, which is much lower than that the matrix friction coefficient of 0.55. The thickness of the clad-ding layer is 2 289.31 μm. The laser cladding equipment and process based on nickel-base alloy can be used for laser cladding repair and reinforcement of mining picks, effectively improving the overall performance of the pick and reducing the cost of en-terprise.

关 键 词：截齿 镍基合金粉 硬度 耐磨性 

分 类 号：TG155.5[金属学及工艺—热处理]