公开(公告)号：EP4306231A1

公开(公告)日：2024-01-17

申请号：EP22841031.2

申请日：2022-05-11

申请人： Shanxi Taigang Stainless Steel Co., Ltd.

发明人： FANG, Xudong ,  LI, Yang ,  XU, Fanghong ,  XIA, Yan ,  ZHANG, Wei ,  ZHAO, Jianwei

IPC分类号： B21C37/04 ,  B21J5/00 ,  B21B1/16 ,  C22C38/48 ,  C22C38/58

摘要： The present disclosure relates to a hot working method for stainless steel bars, comprising: step (1) heating a steel ingot at a heating temperature in a range from 1200 °C to 1270 °C; step (2) subjecting the heated steel ingot to radial forging and cogging down according to a total compression ratio greater than 3 to obtain a square billet; step (3) heating the square billet at a heating temperature in a range from 1200 °C to 1270 °C; and step (4) subjecting the heated square billet to hot rolling to obtain a bar. The processing method of the present disclosure can avoid the quality defect of surface crack while ensuring production efficiency by optimizing the process flow and controlling key process parameters, so that niobium-containing high-alloy austenitic heat-resistant stainless steel bars with good surface quality and structure can be prepared.