居里温度对电阻点焊的影响

2011 6th International Microsystems, Packaging, Assembly and Circuits Technology Conference (IMPACT) Pub Date : 2011-12-29 DOI:10.1109/IMPACT.2011.6117206

T. H. Wu, P. Wei

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引用次数: 2

摘要

研究了电阻点焊过程中居里温度对输运变量和熔核生长的影响。居里温度是表明磁性转变的温度，低于该温度的金属或合金具有高磁导率的铁磁性，高于该温度的金属或合金具有小磁导率的顺磁性。该模型考虑了电磁力、热生成、接触面接触电阻、电极-工件界面接触电阻和工件体电阻。接触电阻包括收缩电阻和薄膜电阻，它们是硬度、温度、电极力和表面状况的函数。计算结果表明，在较高的居里温度下，熔核形成较早。高居里温度在靠近电极边缘的工件表面容易熔化。本文的工作也可以应用于解释各种电子和封装技术中遇到的接触问题。

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Curie temperature effects on resistance spot welding

The effects of the Curie temperature on transport variables and nugget growth during resistance spot welding are investigated. The Curie temperature is the temperature, indicating that magnetic transformation below which a metal or alloy is ferromagnetic with high magnetic permeability, and above which it is paramagnetic with small magnetic permeability. The model accounts for electromagnetic force, heat generations and contact resistances at the faying surface and electrode-workpiece interfaces and bulk resistance in workpieces. Contact resistance includes constriction and film resistances, which are functions of hardness, temperature, electrode force and surface condition. The computed results show that the molten nugget on the faying surface initiates earlier with a high Curie temperature. High Curie temperature readily melts through the workpiece surface near the electrode edge. The present work can also be applied to interpret the contact problems encountered in various electronics and packaging technologies, etc.

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2011 6th International Microsystems, Packaging, Assembly and Circuits Technology Conference (IMPACT)

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