【摘 要】
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Titanium diboride was deposited on the surface of nickel coated copper electrode by electro sparking. The performances of the as-coated electrode during spot welding galvanized steel were analyzed. Th
【机 构】
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School of Materials Science and Engineering, Hubei Automotive Industrial Institute, Shiyan, 442002,
【出 处】
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第十一届全国表面工程大会暨第八届全国青年表面工程学术会议
论文部分内容阅读
Titanium diboride was deposited on the surface of nickel coated copper electrode by electro sparking. The performances of the as-coated electrode during spot welding galvanized steel were analyzed. The results indicate that the electrode degradation during spot welding is primarily subjected to plastic deformation and alloying, which is somehow similar to the uncoated one. However, the high-hardness titanium diboride coating existing all the way at the tip of the electrode greatly reduces the wear of the electrode. The coating hinders direct contact of the copper electrode with the steel sheets, effectively reducing the alloying of copper and zinc. In particular, the alloying zone is obviously narrowed and with a clear boundary, contributing to a longer life of the as-coated electrode when spot welding.
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