镁合金层状复合材料的爆炸焊接研究  

Research on explosive welding of magnesium alloy laminated composites

作　　者：韩刚[1,2] 蒋晓博 程飞[1,2] 王全柱 HAN Gong;JIANG Xiao-bo;CHENG Fei;WANG Quan-zhu(Luoyang Ship Material Research Institute,Luoyang 471023,Henan,China;Luoyang Sunrui Metal Clad Materials Co.,Ltd.,Luoyang 471822,Henan,China)

机构地区：[1]中国船舶重工集团公司第七二五研究所,河南洛阳471023 [2]洛阳双瑞金属复合材料有限公司,河南洛阳471822

出　　处：《工程爆破》2018年第4期71-76,共6页Engineering Blasting

摘　　要：为获得兼具镁合金与其他金属优点的层状复合材料,按照Stivers,Wittman模型,计算动态参数,选取下限工艺,进行AZ31B镁合金与1060铝合金、5083铝合金、T2铜合金、TA2钛合金、S31603不锈钢、Q345R钢的爆炸焊接实验。结果表明:AZ31B镁合金作为基板与1060铝合金复合率超过90%,与其他材料复合率低于50%(不含Q345R钢);与5083铝合金复合的界面结合强度最低。AZ31B镁合金作为复板与1060铝合金、T2铜合金、TA2钛合金、S31603不锈钢、Q345R钢复合率均超过90%,与5083铝合金的复合率只有15%,且复层均脆性断裂严重。这是由于AZ31B镁合金与5083铝合金都含有Mg、Zn等低熔点元素,在爆炸焊接界面易气化、熔化易生成金属间化合物,导致复合率与结合强度偏低。AZ31B镁合金具有密排六方结构,塑性变形能力差的特性。随着应变速率增加,强度增加,塑性降低,导致严重脆性断裂。In order to obtain the layered composite material with the advantages of magnesium alloy and other metals,according to the Stivers,Wittman model,the dynamic parameters were calculated,and the lower limit process was selected to carry out the explosion welding test of AZ31 Band 1060,5083,T2,TA2,S31603 and Q345 R.The results showed that the composite ratio of AZ31 Bas parent plate to 1060 was over 90%,and the composite ratio with other materials was less than 50%（exclude Q345 R）;the interface bonding strength with 5083 was the lowest.As a flyer plate,AZ31 Bhad a recombination rate of more than 90% with 1060,T2,TA2,S31603 and Q345 R,and the recombination rate with 1083 was only 15%,and the brittle fracture of the flyer plate layer was serious.This is because both AZ31 Band 5083 contain lowmelting elements such as Mg and Zn,which are easily vaporized and melted to form intermetallic compounds at the explosive welding interface,resulting in low recombination rate and bonding strength.The multi-layer AZ31 B magnesium alloy has a close-packed hexagonal structure,poor plastic deformation ability,with increased strain rate and strength,and reduced plasticity,then resulting in severe brittle fracture.

关 键 词：镁合金 爆炸焊接 复合率 金属间化合物 脆性断裂 

分 类 号：TG456.6[金属学及工艺—焊接]