Freeform fabrication of superalloy objects by 3D micro welding
Freeform fabrication of superalloy objects by 3D micro welding
复制标题
DOI：
10.1016/j.matdes.2008.06.033
复制
发表时间：
2009-04
影响因子：
8.4
通讯作者：
T. Horii;S. Kirihara;Y. Miyamoto
中科院分区：
文献类型：
--
作者：
T. Horii;S. Kirihara;Y. Miyamoto
三维微细焊接是一种新发展起来的金属快速成型方法。它是微钨极惰性气体保护焊(微TIG)和分层制造方法的结合。由微型TIG焊机熔化细金属丝的尖端，形成一个小金属珠。在计算机控制下，通过层层堆积金属珠子，最终形成3D金属物体。研究了用Inconel 600合金制作简易三维物体的方法。相邻微珠之间的界面具有良好的粘附性。在形成的物体中没有留下裂缝或气孔。测试了合金的抗拉强度、延伸率、密度和维氏硬度，并与商用高温合金进行了比较。研究结果表明，3DMW可以在无模具的情况下，加工出高强度、高抗氧化性的难熔金属的实际微构件或刀具。
3D Micro welding (3DMW) is a newly developed rapid prototyping method for metals. It is a combination of micro tungsten inert gas (micro-TIG) welding and a layered manufacturing method. The tip of a thin metal wire is melted by a micro-TIG welder to form a small metal bead. By building up metal beads layer by layer under computer control, a 3D metal object is eventually formed. The fabrication of simple 3D objects made of Inconel alloy 600 was studied. The interface between adjacent beads had good adhesion. No cracks or pores remained in the formed objects. The tensile strength, elongation, density, and Vickers hardness were measured and compared to those of the commercial superalloy. The obtained results suggest that actual micro components or tools of refractory metals with high strength and oxidization resistance can be formed without molds by 3DMW.