电焊机2017，Vol.47Issue(6)：7-13,7.DOI:10.7512/j.issn.1001-2303.2017.06.02
TiB2-ZrB2涂层电极与TiB-ZrB2/Ni涂层电极失效对比分析
Comparative analysis of electrode degradation between TiB2-ZrB2 coated electrode and TiB2-ZrB2/Ni coated electrode
摘要
Abstract
Scanning electron microscopy,energy dispersive spectroscopy,X-ray diffractometer and microhardness are used to analyze the degradation process of TiB2-ZrB2 coated electrode and TiB2-ZrB2,/Ni coated electrode in spot welding of galvanized steel sheet.The results show that both ZrB2-TiB2 coating and ZrB2-TiB2/Ni coating have a certain degree of ability to hinder the alloying reaction between the cladding of steel plate and spot welding electrode substrate.The degradation processes of ZrB2-TiB2,ZrB2-TiB2/Ni coating electrodes are a little different.For the former,due to its poor bonding force between the coating and substrate,and relatively small plastic phase in the coating,the coating gradually falls off under the action of heat stress of spot welding,the spot welding electrode degradation finally occurs under the influence of alloying and plastic deformation.For the latter,due to its certain plasticity and good bonding force between the coating and substrate,the coating partly falls off in the process of spot welding.The effect of coating lasts until the electrode degradation and the degradation mode is mainly plastic deformation.关键词
涂层电极/电阻点焊/ZrB2-TiB2/电极失效Key words
coated electrode/resistance spot welding/ZrB2-TiB2/electrode degradation分类
矿业与冶金引用本文复制引用
王冲,肖瑶,覃富城,李智,董仕节,罗平..TiB2-ZrB2涂层电极与TiB-ZrB2/Ni涂层电极失效对比分析[J].电焊机,2017,47(6):7-13,7.基金项目
国家自然科学基金(51375150) （51375150）
博士科研启动基金(BSQD2015015) （BSQD2015015）
绿色轻质材料与加工湖北工业大学协同创新中心开放基金(201611A07) （201611A07）
