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首页> 外文期刊>Journal of Materials Engineering and Performance >Some Tribological Influences on the Electrode-Worksheet Interface During Resistance Spot Welding of Aluminum Alloys
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Some Tribological Influences on the Electrode-Worksheet Interface During Resistance Spot Welding of Aluminum Alloys

机译：铝合金电阻点焊过程中对电极-工作面界面的一些摩擦学影响

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摘要

In this study, the effect of worksheet surface characteristics on the electrical contact resistance of electrode-worksheet interface during resistance spot welding of aluminum alloy (AA5182) was discussed. The electrical contact resistance was influenced by both the oxide layer and surface roughness of the worksheet. However, the effect of oxide layer was more dominant, and the effect of surface roughness was likely to be linked with the damaging of oxide layer and not the contact area. The oxide layer on AA5182 was non-uniform with Mg-rich small spots dispersed on the surface. Grinding and scratching the worksheet surface was effective in reducing the oxide layer thickness and, hence, reduced the electrical contact resistance. It was observed that the surfaces with higher electrical contact resistances at this interface showed faster pitting rate of electrode. The study also suggested that the static electrical contact resistance measured before resistance spot welding could be useful for predicting materials likely behavior during the actual resistance spot welding process of AA5182.
机译：在这项研究中，讨论了在铝合金（AA5182）电阻点焊过程中，工作表表面特性对电极-工作表界面电接触电阻的影响。接触电阻受工作层的氧化层和表面粗糙度的影响。但是，氧化层的作用更为显着，表面粗糙度的影响可能与氧化层的损害而不是接触面积有关。 AA5182上的氧化层不均匀，富镁小点分散在表面。研磨和刮擦工件表面有效地减小了氧化物层的厚度，因此减小了电接触电阻。观察到在该界面处具有较高电接触电阻的表面显示出更快的电极点蚀速率。研究还表明，在电阻点焊之前测量的静态接触电阻可用于预测AA5182在实际电阻点焊过程中材料可能的行为。

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