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脉冲MIG焊对7N01铝合金焊接接头组织及力学性能的影响

Hot Working Technology(2012)

Cited 24|Views6
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Abstract
采用金相、硬度、拉伸和微型剪切试验研究了7N01S-T5铝合金单脉冲MIG焊、双脉冲MIG焊和超微弧焊三种焊接工艺条件下焊接接头的组织及力学性能。结果表明,焊接热影响区晶粒长大,且析出强化相出现在晶界处;双脉冲MIG焊焊接接头系数高于单脉冲焊和超微弧焊,超微弧焊接接头韧性优于单脉冲和双脉冲焊接接头。
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Key words
7N01 Al alloy,microstructure,mechanical properties,metal inert gas welding
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