摘要
为了研究4043铝合金电弧增材制造中工艺参数、组织与力学性能之间的相关规律,采用CMT电弧增材制造技术制备了4043铝合金薄壁件。通过金相显微镜、扫描电子显微镜、电子万能试验机等检测设备,对不同工艺参数(焊接速度和送丝速度)制备的制件内部组织与力学性能进行了研究。结果表明,WAAM4043铝合金薄壁件内部组织为α(Al)相和β(Al_(3.21)Si_(0.47))相。随着焊接线能量的增加,Al-Si共晶相会增多,晶界处的β相变得粗大、松散,晶粒也变得粗大。4043铝合金薄壁件的抗拉强度最高为153.7 MPa,伸长率最高为22.5%。拉伸性能在横向与竖向上呈各向异性。过大或过小的焊接线能量都不利于获得好的力学性能。
In order to study the law between process parameters,structure and mechanical properties during 4043 aluminum alloy arc additive manufacturing,4043 aluminum alloy thin wall specimens were prepared by CMT arc additive manufacturing technology.The microstructure and properties of 4043 aluminum alloy sepecimen prepared by diffferent process parameters(welding speed and wire feeding speed)were studied by metallographic microscope,scanning electron microscope and electronic universal tester.The results show that the microstructure of WAAM 4043 aluminum alloy isα(Al)phase andβ(Al_(3.21)Si_(0.47))phase.As the welding heat input increases,the Al-Si eutectic phase increases,and theβphase at the grain boundary becomes coarse and loose,and the crystal grains become coarse.The maximum tensile strength of 4043 thin wall part is 153.7 MPa,and the maximum elongation is 22.5%.The tensile properties are anisotropic in the transverse and vertical directions.Too large or too small welding heat input is not conducive to obtaining good mechanical properties.
作者
卢恒洲
万祥明
张斌
刘建雄
LU Hengzhou;WAN Xiangming;ZHANG Bin;LIU Jianxiong(School of Materials Science and Engineering,Kunming University of Science and Technology,Kunming 650031,China;City College,Kunming University of Science and Technology,Kunming 650051,China;Yunnan Aluminum Co.,Ltd.,Kunming 650502,China)
出处
《热加工工艺》
北大核心
2024年第7期53-56,60,共5页
Hot Working Technology
基金
国家自然科学基金资助项目(52067012)。
