2524与7150铝合金激光焊T型接头的组织与性能

摘要

Optimum process parameters of laser beam welded T joints for 2524 and 7150 aluminum alloys are investigated in this paper.The microscopic structure and mechanical properties for T joints are studied by metallographic analysis,microhardness and tensile test.Test results show the grain in welding seam is fine and dense.The microhardness is lowest in welding seam.The tensile properties for joints in x direction is 384 MPa,while in z direction is 236 MPa.%介绍了2524与7150铝合金激光焊T型接头优化的工艺参数,并研究了T型接头在优化工艺下的显微组织与力学性能,进行金相分析、显微硬度测试与接头拉伸试验.结果表明:优化工艺下焊缝没有裂纹、气孔,金相组织晶粒细小、致密,焊缝区域的硬度最低;T型接头x方向的拉伸强度达到384 MPa,z方向的拉伸强度为236 MPa.