Electric heating – Metal heating – By arc
Patent
1995-05-23
1997-04-08
Silverberg, Sam
Electric heating
Metal heating
By arc
148269, 228 54, 228118, B23K 928
Patent
active
056184565
ABSTRACT:
A method for improving the tip and nozzle of a gas welder in which a conventional or new surface oxidation chemical treatment was applied to improve the surface properties of the tip and nozzle of a gas welder made of copper or copper alloys. Continuous welding operation could then be possible for extended periods of time. If a black copper oxide layer is formed by chemical conversion coating treatment on the surface of the nozzle which is made of copper or copper alloys, then the splatters do not easily stick to the surface. Further, even if the splatters stick, they are more easily removed. In the case of the tip, a black copper oxide layer formed by chemical conversion coating treatment in the small hole of the tip makes the supply of the filler metal wire flow smoothly without troubles. Further, the black copper oxide layer formed by chemical conversion coating treatment also inhibits the sticking of splatters, so that the supply of the filler metal wire is smooth. The filler metal wire can be supplied without discontinuity at least during a limited life time which depends on the properties of the base material.
Korea Institute of Machinery & Metals
Silverberg Sam
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