电力开关用钨材表面离子渗W-Ni-Al合金层的组织及性能  

Microstructure and Properties of Ion Permeated W-Ni-Al Alloy on Tungsten Surface for Power Switch

作　　者：孙锡保[1] 翟文胜 SUN Xi-bao;ZHAI Wen-sheng(College of Intelligent Manufacturing,Xinxiang Vocational and Technical College,Xinxiang 453006,China;College of Physics and Electronics,North China University of Water Resources and Hydropower,Zhengzhou 450046,China)

机构地区：[1]新乡职业技术学院智能制造学院,河南新乡453006 [2]华北水利水电大学物理与电子学院,河南郑州450046

出　　处：《材料保护》2021年第8期85-89,共5页Materials Protection

基　　金：国家自然科学基金(61205058,61331008);河南教育厅基金(13B510401)资助。

摘　　要：为了提高电力开关用钨材合金的耐摩擦和耐腐蚀性能,采用双辉渗方法在试样基体表面制备W-Ni-Al涂层,通过试验测试方式对比了各涂层结构下的钨表面性能差异性。结果表明:在涂层内生成了具有致密结构的组织,几乎没有形成裂纹。提高渗金属的温度后,制备的涂层厚度持续增大。涂层中含有WNi_(2) Al_(3)、NiW_(2)2类组织。当表面被W-Ni-Al涂层覆盖后,硬度发生了显著提升;当载荷增大后,硬度也开始降低。W-Ni-Al涂层都获得了高于基体组织的摩擦系数。在1150℃下制备的涂层获得了最小的体积磨损率,只有基体的13.6%,表现出了优异的抗磨损性能。涂层组织发生了断裂,在磨痕表面形成了平行滑动方向的沟槽。与基体相比涂层腐蚀电位发生明显正移,腐蚀电流密度发生明显降低,涂层具备更优的耐蚀性能。For improving the friction and corrosion resistance of tungsten alloy for power switch,W-Ni-AL coatings were prepared on the surface of sample substrate by double luminescence infiltration,and the difference of tungsten surface performance under different coating structures formed was compared by experimental tests.Results showed that there were dense structures formed in the coating,and almost no crack was observed.After increasing the metallization temperature,the thickness of coatings increased continuously.Meantime,the coating contained WNi_(2)Al_(3) and NiW_(2).When the surface was covered by the W-Ni-Al coating,the hardness increased significantly.With the improvement of the load,the hardness began to decrease.Overall,the friction coefficient of W-Ni-Al coating was higher than that of substrate.At 1150℃,the coating obtained the minimum volume wear rate,only 13.6%of the substate,showing excellent wear resistance.Besides,the microstructure of the coating was fractured,and grooves in parallel sliding direction were formed on the surface of the grinding mark.Compared with the substrate,the corrosion potential of the coating shifted to positive significantly,the corrosion current density decreased greatly,which indicated that the coating possessed better corrosion resistance.

关 键 词：钨材 离子渗 W-Ni-Al涂层 微观组织 摩擦性能 耐腐蚀性能 

分 类 号：TG174.44[金属学及工艺—金属表面处理]