4043铝合金电弧增材制造的组织及力学性能
Microstructure and Mechanical Properties of 4043 Aluminum Alloy Prepared by Wire Arc Additive Manufacturing
卢恒洲 1万祥明 2张斌 3刘建雄1
作者信息
- 1. 昆明理工大学 材料科学与工程学院,云南 昆明 650031
- 2. 昆明理工大学城市学院,云南 昆明 650051
- 3. 云南铝业股份有限公司,云南 昆明 650502
- 折叠
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(Al3.21Si0.47)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.
Abstract
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 is α(Al)phase and β(Al3.21Si0.47)phase.As the welding heat input increases,the Al-Si eutectic phase increases,and the β phase 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.
关键词
电弧增材制造(WAAM)/冷金属过渡(CMT)/4043铝合金Key words
wire arc additive manufacturing(WAAM)/cold metal transfer(CMT)/4043 aluminum alloy引用本文复制引用
出版年
2024
NETL
NSTL
万方数据