材料工程2017，Vol.45Issue(3)：66-72,7.DOI:10.11868/j.issn.1001-4381.2015.000552
5A06铝合金TIG丝材-电弧增材制造工艺
TIG Wire and Arc Additive Manufacturing of 5A06 Aluminum Alloy
摘要
Abstract
Wire and arc additive manufacturing(WAAM) was investigated by tungsten inert gas arc welding method(TIG),in which φ1.2mm filler wire of aluminum alloy 5A06(Al-6Mg-Mn-Si) was selected as deposition metal.The prototyping process was conducted by a TIG power source (working in AC mode) manipulated by a four-axis linkage CNC machine.Backplate preheating temperature and arc current on deposited morphologies of single layer and multi-layer were researched.The microstructure was observed and the sample tensile strength was tested.For single layer,a criterion that describes the correlation between backplate preheating temperature and arc peak current,of which both contribute to the smoothening of the deposited layer.The results show that the layer height drops sharply from the first layer of 3.4mm and keeps at 1.7mm after the 8th layer.Fine dendrite grain and equiaxed grain are found inside a layer and coarsest columnar dendrite structure at layer boundary zone;whereas the microstructure of top region of the deposited sample changes from fine dendrite grain to equiaxed grain that turns to be the finest structure.Mechanical property of the deposited sample is isotropic,in which the tensile strength is approximately 295MPa with the elongation around 36％.关键词
TIG/丝材-电弧增材制造/5A06铝合金/成形/微观组织/力学性能Key words
TIG/WAAM/5A06 aluminum alloy/prototyping/microstructure/mechanical property分类
矿业与冶金引用本文复制引用
黄丹,朱志华,耿海滨,熊江涛,李京龙,张赋升..5A06铝合金TIG丝材-电弧增材制造工艺[J].材料工程,2017,45(3):66-72,7.基金项目
国家自然科学基金资助项目(51475376) （51475376）
西北工业大学凝固技术国家重点实验室自主研究课题资助项目(109-QP-2014) （109-QP-2014）
