Preparation process of duplex stainless steel medium plate

The invention relates to a preparation process of a duplex stainless steel medium plate. The preparation process of the duplex stainless steel medium plate comprises the steps of plate blank fine grinding, plate blank series heating, rough rolling, intermediate blank cooling, intermediate blank side grinding, sub-blank cutting, sub-blank heating, sub-blank rolling and the like. Through the coggingand two times of heating, the problems of multiple passes of medium plate rolling of existing plate blank thicknesses are solved, so that the problems of large edge crack depth and surface peeling defects in the rolling process of the duplex stainless steel medium plate are solved, and the yield of the medium plate is improved. 本发明涉及一种双相不锈钢中厚板的制备工艺，包括板坯精修磨、板坯串联式加热、粗轧、中间坯冷却、中间坯侧修磨、分切子坯、子坯加热和子坯轧制等步骤，通过开坯和两次加热工艺，解决了现有板坯厚度轧制中厚板道次多，轧制过程温降大的问题，从而解决了双相不锈钢中厚板轧制过程中边裂深度大和表面起皮缺陷的问题，提高了中厚板成材率。