高速列车用散热片搅拌摩擦焊接头中S曲线控制策略
S curve control strategy on Friction Stir Welding joint of the Radiator for High-speed Train
贺地求，汪建，徐少华，彭建红
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作者单位：中南大学
中文关键字：散热片；搅拌摩擦焊；6063铝合金；S曲线控制
英文关键字：Radiator;friction stir welding;6063 aluminum alloy;S curve control
中文摘要：本文采用搅拌摩擦焊对底板厚度为20mm的6063-T5铝合金散热片进行了拼接实验。由于焊件所特有的高效散热结构，使焊接区温度梯度大，热量损失严重，导致焊缝横截面出现S形曲线。通过分析焊缝横截面S形曲线的形成机制,采取两条应对控制策略，优化工艺参数,最终得到成型美观、内部无缺陷的FSW焊缝。此研究成果对采用FSW进行同类型铝合金的焊接有重要的指导意义。
英文摘要：In this article, the technology of the friction stir welding tailor-welded is used to join together the 6063-T5 aluminum alloy Radiator whose baseplate thickness is 20mm. Due to the special efficient cooling structure of the weldment,the more welding zone temperature gradient and serious heat loss lead to S form curve that appears in the weld cross section. Through the analysis of the formation mechanism , Two control strategies are adopted,and then the weld joint are both with good appearance and defect-free in the inner with the optimization of process parameters. The research results have important guiding significance to the FSW of the same type aluminum alloy.