摘要
采用不同焊接电流,对3 mm厚5083-H116铝合金板材进行CMT+P焊接试验,并对接头显微组织、拉伸性能、弯曲性能等进行检测。结果表明,焊接电流对接头力学性能和焊缝中心晶粒尺寸有显著影响;焊接电流增大,抗拉强度降低,焊缝中心晶粒尺寸增加。通过对CMT+P焊接参数进行调整,可以获得满足使用要求的焊接接头,抗拉强度281 MPa,达到母材的84.38%;屈服强度163 MPa,达到母材的67.92%;伸长率13.5%,达到母材的75%;焊缝中心为等轴晶,熔合线内侧为柱状晶。
CMT+P welding tests are carried out on 3 mm thick 5083-H116 aluminum alloy sheet at different welding currents,and the microstructure,tensile properties and bending properties of the joints are analyzed.The results show that the welding current has a significant effect on the mechanical properties of the joint and the grain size of weld center.When the welding current increases,the tensile strength decreases and the grain size of weld center increases.The welding joint that meets the using requirements can be obtained by adjusting the welding parameters of CMT+P.In this work,the optimal tensile strength,yield strength and elongation are 281 MPa,163 MP and 67.92%,respectively,which are 84.38%,13.5%and 75%of those of the base metal,respectively.The center of the weld is isometric crystal,and the inner side of the fusion line is columnar crystal.
作者
郭超慧
王鹏云
褚少旗
刘国元
李利
姜峰
田庆年
白晶
GUO Chaohui;WANG Pengyun;CHU Shaoqi;LIU Guoyuan;LI Li;JIANG Feng;TIAN Qingnian;BAI Jing(Luoyang Ship Material Research Institute,Luoyang 471023,China;CRRC Changchun Railway Vehicles Co.,Ltd.,Changchun 130062,China)
出处
《材料开发与应用》
CAS
2022年第4期71-76,共6页
Development and Application of Materials
基金
国家重点研发计划项目(2020YFB0311203)。
