Cr22Ni13Mn5Mo2N奥氏体不锈钢的热轧工艺

运用Gleeble-3800热模拟试验机研究了00Cr22Ni13Mn5Mo2N奥氏体不锈钢在变形温度为1000～1200 ℃,变形量为50%、60%、70%,应变速率为0.05 s^-1条件下的热压缩变形行为,并观察分析变形后试样组织形貌和经1080 ℃固溶热处理后试样的组织形貌。观察试样固溶热处理前后的组织形貌得到在1000~1150 ℃下进行热压缩变形,随着变形量的增加,动态再结晶越完全;经过固溶热处理后,静态再结晶就越充分。但在1200 ℃时,温度过高,再结晶已完成并且晶粒发生长大。在变形量分别为50%、60%和70%时,随着变形温度的升高,再结晶越完全,经固溶热处理后,再结晶更完全。00Cr22Ni13Mn5Mo2N奥氏体不锈钢热轧最佳轧制温度为1100 ℃,压缩变形量为70%。

Hot rolling process of 00Cr22Ni13Mn5Mo2N austenitic stainless steel

Hot compression deformation behavior of 00Cr22Ni13Mn5Mo2N austenitic stainless steel was studied by using Gleeble-3800 thermal simulator at deformation temperature of 1000-1200 ℃, deformation of 50%, 60%, 70% and strain rate of 0.05 s^-1. The microstructure after deformation behavior and after solution heat treatment at 1080 ℃ was observed and analyzed. Observing the morphology of the structure before and after solution heat treatment obtains that performing thermal compression deformation at 1000-1150 ℃, the dynamic recrystallization is more complete as the deformation increasing, and after solution heat treatment, the static recrystallization is more complete. However, when the temperature is too high at 1200 ℃, the recrystallization has been completed and the grains grow. When the deformation is 50%, 60% and 70%, with the increase of the deformation temperatures, the recrystallization is more complete, and after solution heat treatment, the recrystallization becomes more complete. The optimum rolling temperature for hot rolling of 00Cr22Ni13Mn5Mo2N austenitic stainless steel is 1100 ℃ and the compression deformation is 70%.