CMT增材制造工艺对5356铝合金熔敷层组织及力学性能的影响

采用冷金属过渡(CMT)电弧增材方法,以5356铝合金焊丝为试验对象,研究了送丝速度与焊接速度对5356铝合金电弧增材制造成形的影响,并分析了熔覆层微观组织特性和增材试样的力学性能。结果表明:送丝速度和焊接速度是电弧增材制造尺寸精度的重要影响因素;熔覆层微观组织可分为3个区域。不同焊接速度下,增材试样的力学性能均超过焊丝拉伸强度标准值,抗拉强度平均值达到274.7 MPa。

Effects of CMT Additive Manufacturing Process on Microstructure and Mechanical Properties of 5356 Aluminum Alloy Cladding Layer

The effects of wire feeding speed and welding speed on the manufacturing and forming of 5356 aluminum alloy arc additive are studied by using the method of cold metal transition (CMT) arc additive. The microstructure characteristics of the cladding layer and the mechanical properties of the additive samples are analyzed. The results show that wire feeding speed and welding speed are important factors affecting the dimensional accuracy of arc additive manufacturing, and the microstructure of the cladding layer can be divided into three regions. At different welding speeds, the values of tensile strength of the additive samples all exceed the standard value of tensile strength of the welding wire, and the average value of tensile strength reaches 274.7 MPa.