| 摘要 |
PURPOSE:To improve production efficiency by making a filling material contain a tungsten carbide of prescribed wt. percent or more and a thermoset resin within a range of specific percent. CONSTITUTION:A mild steel hoop is used for an outer sheath of filler rod, and a filling material is made to contain a >=95% wt% tungsten carbide and a 0.5-2.0wt% thermoset resin. Because of the existences of tungsten carbide and thermoset resin in the filling material, the material is prevented from sticking to the vessel of powder feeder. Further, at the time of drawing a tubular wire formed previously, the heated filling material solidifies to eliminate a drying stage. In this way, a filler rod excellent in weldability is efficiently manufactured.
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