The quality of resistance spot welding of lowcarbonsteel and high strength lowalloy steel is studied by looking into the dynamic voltage characteristics of the electrodes.
本文通过对电阻点焊电极电压动态特性的分析，研究了低碳钢及低合金高强度钢电阻点焊的质量问题。
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Preheating shall be carried out for carbon and lowalloysteel welding where required. Preheating temperature shall be kept uniform from the start to the end of welding.