使用传统ER5356焊丝及添加Sc、Zr、Er的ER5356焊丝对7A52铝合金进行钨电极惰性气体保护焊,研究了Sc、Zr、Er对焊接接头力学性能的影响.结果表明,在ER5356焊丝中添加Sc、Zr、Er可有效细化焊缝处的组织,提高焊接接头的强度.单独添加Sc的焊丝效果最好,焊接接头的抗拉强度可达322.5 MPa,是母材强度的70.4％.
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