基于Cu-Al-Fe合金的粉芯丝材增材制造理论及其温度场分析

Analysis of the theory and temperature field of additive manufacturing with powder core wire based on Cu-Al-Fe alloy

目前有关粉芯丝材增材制造的研究较少,其理论尚不成熟.将Cu-Al-Fe合金作为研究对象,系统论述了粉芯丝材电弧增材制造的相关理论(沉积成形理论、梯度传热理论和晶粒细化理论),并使用Simufact-Welding平台搭建了单道多层数值模型,通过对多组别温度场的分析,获得了试验条件下的最佳工艺窗口,即输入电流140 A和扫描速度0.4 m/min,最后开展了优化工艺窗口下的粉芯丝材沉积成形试验.结果表明,在此工艺窗口下可获得形状较好的薄壁墙,该研究为开展粉芯丝材电弧增材制造提供必要的理论基础与试验依据.

There are few studies on additive manufacturing with powder core wire,and its theory is still immature.Taking Cu-Al-Fe alloy as the research object,this paper systematically discusses the relevant theories of additive manufacturing with powder core wire(deposition forming theory,gradient heat transfer theory and grain refinement theory).The Simulact-Welding platform was used to build a single-channel and multilayer numerical model.Through the analysis of the multigroup temperature field,the optimal process window under the test conditions is obtained,the input current of 140 A and scanning speed of 0.4 m/min.Finally,the deposition forming test of powder core wire under the optimized process window is carried out.The results indicate that taking the optimized process can obtain a thin wall with a good shape.And this study can provide the necessary theoretical and experimental basis for arc additive manufacturing with powder core wire.