铝合金与高强钢摩擦塞铆焊接头连接性能  

Connection performance of friction element welding between aluminum and high strength steel

作　　者：Lyu Shuqiang Kim Jihoon Cho Haeyong 

机构地区：[1]Department of Mechanical Engineering,Chungbuk National University,Chungbuk,361-763,Korea [2]Sunil Dyfas Co.,Ltd.,Jincheon-Gun,Chungbuk,365-830,Korea

出　　处：《焊接学报》2021年第11期8-13,I0001,共7页Transactions of The China Welding Institution

基　　金：Carbon Industry Foundation Creation Projects of Korea Evaluation Institute of Industrial Technology (10083614)。

摘　　要：为了解决铝合金与高强钢材料之间连接困难的问题,保证铝合金与高强钢之间的连接质量,采用摩擦塞铆焊工艺实现了6061-T6铝合金和DP1470高强钢的连接,并通过对接头宏观形貌和微观组织特征的观察、接头力学性能的测试以及接头失效形式的对比,研究了摩擦塞铆焊所获接头连接性能的变化规律.结果表明,转速是影响焊接质量的重要因素.在焊接试验过程中,转速控制范围为5 000~8 000 r/min,接头的抗拉强度随转速的增加先升高后降低,当转速达到7 000 r/min时,接头所承受的剪切载荷最大,可以达到6.3 kN,此时得到的接头表面平整,无明显孔洞、裂纹等缺陷.铝合金板材在接头处发生断裂失效时,接头所能承受载荷相对较大,焊接质量较高.因此,铝合金和高强钢能够通过摩擦塞铆焊工艺实现高质量连接.In order to find out the difficulty of the bonding between aluminum alloy and high strength steel material,ensured the high quality bonding between them, friction element welding was used to implement the bonding between6061-T6 aluminum alloy and high strength steel DP1470. By observed the macro morphology and microstructure of the joint, tested the joint mechanical properties and compared the joint failure forms, the variation law of bonding performance of joint obtained by friction element welding was studied. The results show that rotating speed is an important factor affecting the welding quality. During the welding test,the speed control range is 5 000-8 000 r/min. The tensile strength of the joint will increase at first and then decrease with the increase of the rotating speed. When the rotating speed reaches 7 000 r/min,the shear load of the joint can reach 6.3 kN, the surface of the joints are flat without cracks and pores. When the failure mode of the joint is the fracture failure which occurs on the aluminum alloy plates at the joint, the tensile strength of the joint will increase higher and the welding quality will be better. Therefore,aluminum alloy and high strength steel can achieve high-quality joining through friction element welding.

关 键 词：铝合金 高强钢 摩擦塞铆焊 力学性能 失效形式 

分 类 号：TG456.9[金属学及工艺—焊接]