| 摘要 |
PURPOSE:To cover a core wire with metallic powder without having no defect by leading the core wire whose surface is purified and which is heated in an oxidizing atmosphere, into the metallic powder, deoxidizing the surface oxide, also making both of them stickable easily, and thereafter, press-welding and joining them by a working tool. CONSTITUTION:A steel wire 1 whose surface has been purified by defatting and polishing is heated to about 400 deg.C in an oxidizing atmosphere of a heating furnace 4 and a uniform oxide film is formed on the surface, and thereafter, it is led into an Al powder tank 5, iron oxide of the surface of the steel wire 1 is deoxidized by Al powder 2, and also the Al powder 2 is made stickable easily to the surface. Subsequently, the steel wire 1 is passed through a die 3 provided on the other end of the tank 5, and in this case, the Al powder 2 is led into the die 3 by a frictional sticking force to the steel wire 1, and in this die, the Al powder 2 is press-welded and covered to the surface of the steel wire 1 in a cold or heated state, and an Al covered steel wire 6 is obtained. In this way, a composite metallic wire having a covered layer which has no defect and is good in its adhesive property is obtained continuously. |
