CMT工作模式对4043铝合金电弧增材成形性能的影响
Effects of CMT Working Modes on Forming Properties of WAAM 4043 Aluminum Alloy
梁福元 1邢鹏飞 2吴孟武3
作者信息
- 1. 武汉理工大学现代汽车零部件技术湖北省重点实验室,武汉 430070
- 2. 智能农业动力装备全国重点实验室,洛阳 471039
- 3. 武汉理工大学现代汽车零部件技术湖北省重点实验室,武汉 430070;湖北隆中实验室,襄阳 441000
- 折叠
摘要
采用CMT焊机4种工作模式对4043铝合金电弧增材单层单道成形进行研究,并通过多层单道成形制备了单壁墙试样,分析了工作模式对试样微观组织与力学性能的影响.结果表明,CMT-Pulse模式下的焊道余高系数较大,铺展性较好,而CMT-Advanced模式下的焊道余高系数较小,铺展性较差.CMT工作模式对电弧增材微观组织、气孔率及力学性能有着显著影响,通过CMT-Pulse+Advanced模式制备的试样晶粒较为细小均匀,气孔率最小为4.88%,此时单壁墙试样的横向和纵向抗拉强度均优于其他模式,分别为148 MPa和138 MPa,其抗拉强度各向异性最小,仅为6.8%.
Abstract
Different working modes of CMT welding machine were utilized to investigate the single-layer and single-pass forming of 4043 aluminum alloy by wire and arc additive manufacturing process,and single-wall specimens were prepared by multi-layer and single-pass forming.Effects of working mode on microstructure and mechanical properties of specimens were analyzed.The results indicate that the high residual height coefficient in CMT-pulse mode leads to desirable spreadability,while the lower residual height coefficient in the CMT-Advanced mode leads to poorer spread-ability.The CMT working mode has a significant impact on the microstructure,porosity,and mechanical properties of specimens.The grain in specimens fabricated by CMT-pulse+advanced mode is finer and more uniform,with a mini-mum percentage of 4.88%,where the transverse and longitudinal tensile strength of the single-wall specimens are 148 MPa and 138 MPa,respectively,which are higher than those in the rest CMT modes,and a minimum tensile strength anisotropy of 6.8%is also obtained.
关键词
4043铝合金/电弧增材制造/焊道形貌/力学性能Key words
4043 Aluminum Alloy/WAAM/Welding Bead Morphology/Mechanical Properties引用本文复制引用
基金项目
湖北省重点研发计划(2022BAD100)
智能农业动力装备全国重点实验室开放基金(SKLIAPE2023014)
武汉理工大学襄阳技术转移中心科技产业化资金资助项目(WXCJ-20220018)
出版年
2024
NETL
NSTL
万方数据