EQUIPMENT SYSTEM FOR PRODUCING PIERCING-ROLLING PLUG

摘要

This facility for producing a plug used in a piercing mill used in the production of a seamless steel pipe is provided with: a shot blasting device that shot blasts the surface of a plug; and an arc spraying device that arc sprays an iron wire to the base material surface of the plug that has been subjected to shot blasting, forming a coating film configured from an oxide and Fe. The arc spraying device has a plurality of spraying booths that individually form a coating film for each of a plurality of regions resulting from demarcating the base material surface of the plug along the axial direction of the plug. As a result, it is possible to produce a plug that can maintain plug production efficiency at a high level, is stable during piercing, and can have increased plug life.