铝合金双面同步平－仰焊接头成形机理与力学性能
wf（2016）
Abstract
采用双面同步平－仰焊工艺，对8 mm厚5083铝合金进行试验研究，分析了熔池的成形机理，并测试了接头的力学性能．结果表明，工件熔透时形成“公共熔池”，当破坏力大于维持力时，熔池液面下凹，下凹程度随热输入的增大而增大，弯曲液面产生附加压力，压力值与液面的凹陷程度成正比，最终熔池受力达到平衡，形成上凹下凸的“倒拱桥”形接头；双面同步平－仰焊的熔敷化效率达到了17．29％，远高于单面弧焊的2．20％；接头的平均抗拉强度与断后伸长率分别为275．14 MPa和14．73％，达到母材的90．70％和53．18％．
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