TiB_(2)增强铝基复合材料丝材电弧增材成形研究  

Research on arc additive manufacture forming of TiB_(2) reinforced aluminum matrix composite wire

作　　者：蒋鹏 孙焕焕[1] 赵亮[1] 梁子剑 刘易麟 JIANG Peng;SUN Huanhuan;ZHAO Liang;LIANG Zijian;LIU Yilin(School of Materials Science&Engineering,Shenyang Ligong University,Shenyang 110159,China)

机构地区：[1]沈阳理工大学材料科学与工程学院,沈阳110159

出　　处：《焊接》2025年第4期50-56,共7页Welding & Joining

基　　金：辽宁省自然科学计划项目(2022-MS-275)。

摘　　要：【目的】以TiB_(2)/6056复合材料丝材为焊材,采用冷金属过渡辅助脉冲模式(CMT+P)为加热方式,探索TiB_(2)增强铝基复合材料丝材的电弧增材工艺。【方法】采用Simufact welding软件模拟单层多道增材温度场,进行单层多道增材试验及微观组织分析。【结果】工艺研究结果表明,脉冲电流140 A,送丝速度8 m/min,焊接速度5 mm/s,为最佳的复合材料丝材增材参数;搭接间距为0.736倍单道焊道宽度时,单层多道增材层成形良好,表面平整。【结论】模拟和试验结果均证实,单层多道增材过程中,正在焊接焊道受前面焊道和后面焊接焊道的热作用均较大,导致焊后晶粒尺寸粗大。气孔大多位于焊道间熔合区处,TiB_(2)颗粒呈聚集态分布在α-Al的枝晶之间。[Objective]Arc additive manufacturing process of TiB_(2) particle reinforced aluminum matrix composite wire was explored in this paper.TiB_(2)/6056 aluminum matrix composite wire was used as welding material,and cold metal transition with addition of pulse(CMT+P)was employed as heating method.[Methods]The temperature field distribution of single-layer and multi-bead additive part was simulated by Simufact welding software.The single-layer and multi-pass additive part was produced,and the microstructures were observed and analyzed.[Results]The results of process test showed that when the current was 140 A,wire feeding speed was 8 m/min,welding speed was 5 mm/s,and the forming performance of additive part was the best.The overlapping width was 0.736 times that of the bead width,which was suitable for the inter pass lap forming of single-layer and multi-bead additive with smooth and uniform surface.[Conclusion]The simulation and experiment results both testified that during single-layer and multi-pass additive manufacturing,the welding beads were greatly affected by the heat of the welded beads and the following beads,which led to form the coarse-grained microstructures.Porosities were mostly distributed at fusion zone between of adjacent beads.TiB_(2) particulates were aggregated at the grain boundary ofα-Al.

关 键 词：复合材料丝材 冷金属过渡 电弧增材 温度场 

分 类 号：TG442[金属学及工艺—焊接]