| 激光功率对激光熔覆Ni包WC涂层组织与性能的影响 |
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| 引用本文： | 成诚,赵剑峰,田宗军,冯君,谢德巧,肖猛.激光功率对激光熔覆Ni包WC涂层组织与性能的影响[J].南京航空航天大学学报,2016,48(6):890-894. |
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| 作者姓名： | 成诚 赵剑峰 田宗军 冯君 谢德巧 肖猛 |
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| 作者单位： | 南京航空航天大学机电学院，南京,210016 |
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| 摘 要： | 采用IPG YLS-6000型
大功率光纤激光器在42CrMo合金表面制备Ni包WC涂层，研究激光功率对涂层组织及性能的影响。研究表明:随着激光功率的增大，涂层组织呈粗化趋势;且在激光功率的增大过程中，涂层中WC颗粒逐渐分解为Fe-C化合物，硬度逐渐减小;当激光功率为1 800 W时，显微硬度达到最大值1 050 HV;Ni包WC涂层显著提高了基材的耐磨性，在同等磨损条件下，涂层的磨损量仅为基体试件的1/5，但激光功率对涂层磨损量的影响不大。
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| 关 键 词： | 激光功率 Ni包WC 组织 显微硬度 耐磨性 |
Effects of Laser Power on Microstructure and Properties of Laser Cladding Ni Coated WC Layer |
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| Cheng Cheng,Zhao Jianfeng,Tian Zongjun,Feng Jun,Xie Deqiao,Xiao Meng.Effects of Laser Power on Microstructure and Properties of Laser Cladding Ni Coated WC Layer[J].Journal of Nanjing University of Aeronautics & Astronautics,2016,48(6):890-894. |
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| Authors: | Cheng Cheng Zhao Jianfeng Tian Zongjun Feng Jun Xie Deqiao Xiao Meng |
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| Institution: | College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics &
Astronautics, Nanjing, 210016, China |
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| Abstract: | Ni coated WC is cladded on 42 CrMo alloy surface by using IPG YLS-6000 high power fiber laser, and the effects of laser power on microstructure and properties of Ni coated WC coating are studied. It is found that with the increase of laser power, the microstructure shows a trend of roughening, and the coating hardness decreases because of WC particles
gradually decompostion into Fe-C compounds. Also, when the laser power is 1 800 W, micro hardness is 1 050 HV. Furthermore, the wear resistance of specimens is significantly improved by laser cladding. Under the same wear condition, the abrasion loss of coating is only about 1/5 of the substrate. And the influence of laser
power on the coating wear is not obvious. |
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| Keywords: | laser power Ni coated WC structure micro hardness wear resistance |
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