Method for producing stainless steel material

Abstract

Provided is a method for producing a stainless steel material having good cold workability even if Cu is contained.　This method is for producing a stainless steel material containing, in mass%, 0.47-0.75% of C, 0.1-1.5% of Si, 0.1-1.5% of Mn, 0.1-0.8% of Ni, 12.0-14.0% of Cr, and 1.5-3.2% of Cu, the remaining portion being Fe and unavoidable impurities, the method comprising cooling steps for obtaining the stainless steel material by cooling a heated-held material that is obtained by heating and holding, for 1-20 hours, a hot-worked material having said alloy composition at a temperature of 800-900°C. The cooling steps include a first cooling step for cooling the heated-held material to a first cooling termination temperature of 700°C or less at a first cooling rate of 15°C / h or less to obtain a first cooled material, and a second cooling step for cooling the first cooled material at a second cooling rate faster than the first cooling rate. When the first cooling termination temperature is 670-700°C, the upper limit of the second cooling rate is set to 250°C / h, and when the first cooling termination temperature is less than 670°C, the upper limit of the second cooling rate is set to 1500°C / h.

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