Q960钢/6061铝合金MIG焊接头组织性能研究  

Microstructure and Properties of Q960 Steel/6061 Aluminum Alloy MIG Welded Joint

作　　者：户佩佩 赵媛媛[1] 李恒 邢峰 HU Peipei;ZHAO Yuanyuan;LI Heng;XING Feng(Henan Vocational College of Mechanical and Electrical Engineering,Zhengzhou 451191,China;School of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450001,China)

机构地区：[1]河南机电职业学院,河南郑州451191 [2]郑州大学材料科学与工程学院,河南郑州450001

出　　处：《热加工工艺》2022年第11期132-136,140,共6页Hot Working Technology

基　　金：中国博士后科学基金资助项目(20170410886);河南省自然科学基金项目(411063117)。

摘　　要：研究了焊接工艺参数对Q960钢/6061铝合金MIG焊成形以及接头界面区微观组织、物相组成和拉伸性能的影响。结果表明,Q960/6061MIG焊接头的熔深、熔宽和余高都随着焊接电流增加而增大,随着焊接速度增大而减小;界面区由靠近Q960钢侧的Fe_(2)Al_(5)相和靠近6061铝合金侧的Fe_(4)Al_(13)相组成。焊接电流为85~125 A、焊接速度为35~55 cm/min时可以取得较好的成形效果;焊接电流为105 A、焊接速度为45 cm/min时可以获得较好的焊接质量,抗拉强度最大。接头的断裂位置均位于界面区,这主要与界面区存在硬脆金属间化合物Fe_(2)Al_(5)和Fe_(4)Al_(13)有关。The effects of welding parameters on the MIG weld forming of Q960 steel/6061 aluminum alloy and the microstructure, phase composition of interface and tensile properties of the welded joints were studied. The results show that the weld penetration, weld width and reinforcement of Q960 steel/6061 aluminum alloy MIG welding joint increase with the increase of welding current and decrease with the increase of welding speed;the interface zone consists of Fe_(2)Al_(5) phase near Q960 steel side and Fe_(4)Al_(13) phase near 6061 aluminum alloy side. The better forming effect can be obtained when the welding current is 85-125 A and the welding speed is 35-55cm/min. When the welding current is 105 A and the welding speed is 45cm/min, MIG welding joint with good quality can be obtained, the tensile strength is the maximum. The fracture position of the joints is located in the interface area, which is mainly related to the hard brittle intermetallic compound Fe_(2)Al_(5) and Fe_(4)Al_(13) in the interface area.

关 键 词：Q960钢 6061铝合金 MIG焊 

分 类 号：TG444.74[金属学及工艺—焊接]