| 摘要 |
PURPOSE:To provide the beta-type Ti alloy electrode capable of preventing the reduction in ductility of weld zone at the time when using for welding beta-type Ti alloy especially, made by the Ti alloy contg. Y and/or B in specific amt. in the beta-type Ti alloy. CONSTITUTION:The beta-type Ti alloy electrode of this invention is composed of the Ti alloy contg. 0.02-0.10 wt.% Y and/or 0.002-0.10 wt.% B in the beta-type Ti alloy. As said beta-type Ti alloy Ti-15V-3Cr-3-Sn-3Al is given, for instance. In this invention, the Y and B impede the movement of grain boundary by being entering into solid solution as an intermetal compound and simple substance, working to refine crystal grains. Consequently, the ductility reduction of a weld zone can be prevented by using the welding rod of this invention. |
