An on-line austenite control rolling and cooling process for stainless steel hot-rolled coil

Abstract

The application provides a controlled rolling and controlled cooling online sorbite process of a stainless steel hot-rolled coil, and belongs to the field of stainless steel heat treatment in the field of steel metallurgy. The controlled rolling and controlled cooling online sorbite process comprises the following steps: after the final rolling of hot rolling is completed, online water spraying cooling is performed on the stainless steel hot-rolled plate, then the stainless steel hot-rolled coil is obtained by coiling, after the coiling is completed, the stainless steel hot-rolled coil is directly loaded into a heat preservation heating furnace and is transported to a heating and heat preservation station to perform online heat treatment of sorbite, after the heat treatment is completed, the stainless steel hot-rolled coil is placed into hot water for cooling, and finally the stainless steel hot-rolled coil is cooled to room temperature, so that the stainless steel hot-rolled coil with a completely sorbite metallurgical structure is prepared. The process of the application realizes the sorbite and fine grain of the stainless steel hot-rolled coil, eliminates secondary heating, shortens the production turnover time, makes the metallurgical structure and performance of the stainless steel sorbite coil consistent, and realizes the controllable yield strength of four levels of the stainless steel hot-rolled coil.

Images