Experimental Studies on Explosive Welding of Magnesium Alloy（AZ31）/Aluminum Alloy（7A52） Composite Joints
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摘要: 对材料组合为AZ31/7A52的镁合金/铝合金进行了爆炸焊接的工艺性研究。分析了其结合界面的金相组织和硬度,测量了爆炸焊接界面的波形参数,探讨了不同爆炸焊接工艺对爆炸复合效果(界面波形和复合率)的影响。结果表明,镁合金AZ31塑性差,爆炸复合困难,复合率<10%;复合界面为波纹状结合,波长约2.20mm,波高约0.40mm;并且随着装药量的减小,波长和波高有所减小;界面塑性加工硬化显著;AZ31/7A52的爆炸焊接窗口非常小,对工艺参数十分敏感。Abstract: Magnesium alloy(AZ31) and Aluminum alloy(7A52) were bonded by different explosive welding technologies.The interface configuration and micro-hardness was analyzed.The wave parameters were measured by optical microscope.The results show that explosive welding between AZ31/7A52 is difficult owing to brittleness of AZ31 with recombination rate <10%,the interface is a regular sine wave shape with wave length about 2.20mm and the wave amplitude about 0.40mm.The wave length and amplitude depend on explosive density or thickness.The bonding region is hardened in explosive processing.AZ31/7A52 joint is considerably sensitive to explosive technological parameters,and the explosive welding window was narrow.
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