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1.前言近年来,为了提高汽车车身的防锈性能,正在开发各种新式表面处理钢板。虽然在汽车上采用表面处理钢板的目的首先在于提高防腐蚀性能。但实际上,一台汽车在装配线上完成之前要经过各种措施的处理,如果这种表面处理钢板仅仅耐腐蚀性好,其他性能不好,那么,也是很难在生产中采用的。汽车用钢板除了耐腐蚀性能,还应具备另一个特性——点焊性能。一台汽车车身上多达3000个点焊点,其中大部分是双面点焊,其次是单面多点点焊。因此,在点焊中,延长电极寿命也是提高汽车工业生产率的一个关键。在各种新式表面处理钢板中,电镀锌
1. Introduction In recent years, in order to improve the anti-rust performance of automobile body, a variety of new surface-treated steel sheets are being developed. Although the purpose of using surface-treated steel in automobiles is primarily to improve corrosion protection. However, in fact, a car to be completed before the assembly line to go through a variety of measures to deal with if the surface treatment of steel only good corrosion resistance, and other performance is not good, then it is difficult to use in production. In addition to automotive steel plate corrosion resistance, but also have another feature - spot welding performance. Up to 3000 spot welds on a car body, most of which are double-spot welding, followed by single-spot welding. Therefore, in spot welding, to extend the life of the electrode is also a key to improve the productivity of the automotive industry. In a variety of new surface treatment of steel, galvanized