电弧增材工艺对5356铝合金组织和性能的影响对比研究  

Comparative Study on Influence of Arc Manufacturing Process on Microstructure and Properties of 5356 Aluminum Alloy

作　　者：杨光[1] 王宝星 王向明[2] 周思雨 崔灿[2] 钦兰云[1] YANG Guang;WANG Baoxing;WANG Xiangming;ZHOU Siyu;CUI Can;QIN Lanyun(Key Laboratory of Fundamental Science for National Defense of Aeronautical Digital Manufacturing Process,Shenyang Aerospace University,Shenyang 110136,China;Avic Shenyang Aircraft Design and Research Institute,Shenyang 110136,China)

机构地区：[1]沈阳航空航天大学航空制造工艺数字化国防重点实验室,辽宁沈阳110136 [2]沈阳飞机设计研究所,辽宁沈阳110136

出　　处：《热加工工艺》2022年第21期25-29,共5页Hot Working Technology

基　　金：国家自然科学基金项目(51975387);装备预研重点基金项目(61409230311)。

摘　　要：为了研究CMT与MIG电弧增材工艺对5356铝合金组织和性能的影响,对两种工艺电弧增材加工后的试样成型形貌、气孔、微观组织和力学性能进行了对比分析。结果表明,采用CMT方式增材的试样表面均匀,而MIG试样边缘出现明显塌陷;两种试样的气孔缺陷主要出现在层间熔合线附近,但MIG试样缺陷数量更多、尺寸更大;两种方式增材的试样组织存在明显区别,MIG试样的柱状晶和熔合线明显,CMT试样的组织为均匀的等轴晶,但CMT试样内部出现明显的偏析现象;MIG试样力学性能各向异性明显而CMT试样呈现出各向同性。In order to study the effect of CMT and MIG arc additive processes on the microstructure and properties of5356 aluminum alloy, the forming morphology, porosity, microstructure and mechanical properties of the two arc additive deposited specimens were compared and analyzed. The results show that the surface of CMT deposited specimen is uniform while the MIG deposited specimen has obvious collapse at the edge. The pores of the two deposited specimens are mainly near the fusion line between layers, while the MIG deposited specimen has more defects and larger sizes. The microstructure of the two deposited specimens is obviously different, the columnar crystal and fusion line of MIG deposited specimen are obvious,while the microstructure of the CMT deposited specimen is uniform equiaxial crystal. However there is obvious segregation in the CMT sample. The mechanical properties of MIG deposited specimen is anisotropic, while that of the CMT deposited specimen is isotropic.

关 键 词：电弧增材 5356铝合金 冷金属过渡(CMT) 熔化极惰性气体保护焊(MIG) 

分 类 号：TG455[金属学及工艺—焊接] TG444.7