搭接形式对铝/黄铜异种热补偿电阻点焊接头的组织与力学性能影响

张禹; 郭璟; 罗震; 毕敬; 高景俊; 宋仁峰

搭接形式对铝/黄铜异种热补偿电阻点焊接头的组织与力学性能影响

张禹¹,
郭璟¹,
罗震^1,,
毕敬¹,
高景俊²,
宋仁峰³

1.
天津大学材料科学与工程学院, 天津 300072
2.
鞍钢集团矿业公司, 鞍山 114001
3.
鞍钢集团矿业设计研究院, 鞍山 114001

基金项目: 国家自然科学基金资助项目（51505327，51405334，51275342，51575383）；教育部博士点基金资助项目（20130032110004）

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- 收稿日期: 2015-04-01

Effects of joint type on microstructure and mechanical properties of Al/brass joint welded by thermo-compensated resistance spot welding

1.
School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China
2.
Ansteel Mining, Anshan 114001, China
3.
Ansteel Mining Engineering Corporation, Anshan 114001, China

摘要

摘要: 采用不同搭接形式，对铝合金6061-T6/黄铜H70异种材料热补偿电阻点焊工艺进行研究.对比了两种搭接形式下铝/黄铜异种点焊接头的微观组织与力学性能差异.结果表明，采用热补偿电阻点焊的工艺方法可在较低电流水平下实现铝/黄铜异种材料的焊接.在铝侧施加热补偿垫片进行点焊，接头的抗拉剪载荷更高，其熔核由细小的α-Al等轴晶组成；在黄铜侧施加热补偿垫片进行点焊，接头的抗拉剪载荷较小，但体现出延性断裂的特征，其熔核由板条状铜铝化合物组成.
- 铝/黄铜异种焊接 /
- 热补偿电阻点焊 /
- 微观组织 /
- 力学性能
Abstract: The process of thermo-compensated resistance spot welding for aluminum alloy 6061-T6 and alpha brass H70 was studied by using different lap joint design. The difference of microstructures and mechanical properties of Al/Brass dissimilar joints welded by two kinds of joint design was compared. The results showed that aluminum alloy and brass can be welded at lower current by using thermo-compensated resistance spot welding. When the thermal compensation coupon was set at Al side, the tensile shear load of the joint was higher in which the nugget consisted of fine equiaxed α-Al grains. When the thermal compensation coupon was set at brass side, the tensile shear load of the joint was lower, but ductile fracture characteristic was showed and the nugget consisted of lath-shaped Cu-Al intermetallic compound.
- dissimilar welding of aluminum and brass /
- thermo-compensated resistance spot welding /
- microstructure /
- mechanical properties

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参考文献(8)

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文章访问数: 331
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搭接形式对铝/黄铜异种热补偿电阻点焊接头的组织与力学性能影响

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Effects of joint type on microstructure and mechanical properties of Al/brass joint welded by thermo-compensated resistance spot welding

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