POST-BORIDING PROCESSES FOR TREATING PIPE AND RECOVERING BORONIZING POWDER

摘要

A process comprising: - placing a boronizing powder composition in a metal pipe comprising a first end, a second end, an inside surface and an outside surface; - heating the pipe to form a borided layer on the inside surface, and spent boronizing powder; - removing the spent boronizing powder from the pipe, thereby forming an empty boronized pipe; - heating the empty boronized pipe to above its austenitizing temperature, thereby forming an austenitized pipe; - quenching the austenitized pipe, thereby forming a quenched pipe; - tempering the quenched pipe, thereby forming a tempered pipe; and - threading the tempered pipe.