为减弱或消除搅拌摩擦焊工艺(FSW)对时效成形的不利影响,改善2A12铝合金FSW构件的时效成形后的综合性能,通过设计不同的预热处理和时效成形组合工艺,试验研究热处理对2A12铝合金FSW构件时效成形组织和性能的影响.结果表明,在其他条件相同的情况下,预热处理(退火+固溶处理)可有效改善FSW构件的时效成形性.与单一时效成形过程相比,退火+固溶+时效成形组合工艺下,焊接构件的回弹率降低,抗拉强度和焊缝硬度显著提高,且预热处理的存在使得焊缝区域组织得到一定程度的细化和均匀化.经退火+固溶+时效成形的焊件,回弹率可达17.98％;抗拉强度可达394 MPa,为母材的89.5％.
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