METHOD FOR PRODUCING A Tool for pierce-rolling

摘要

1. A method of manufacturing a mandrel for use in a piercing mill for manufacturing a seamless steel pipe / tube, characterized in that it comprises the following steps: shot peening the surface of the mandrel, ielektrodugovoe spraying using wire for making a film on the surface of the plug base metal, which is subjected to shot blasting processing prichemna arc spraying step is performed by electric arc spraying using, as the wire for electrostatic spraying, wire nap lnitelem, wherein the tubular steel shell is filled with at least iron oxide particles, iron particles and iron oxide particles so as to form a film containing oxides of iron and zhelezo.2. A method of manufacturing a mandrel according to claim piercer. 1, characterized in that the iron oxide particles include particles of one or several types, including particles of FeO, FeOchastitsy particles and FeO.