热变形对含铌奥氏体不锈钢07Cr18Ni11Nb再结晶行为的影响

采用热模拟压缩及中试热轧的试验方法,研究了热变形对含铌奥氏体不锈钢07Cr18Ni11Nb再结晶行为的影响。结果表明:热压缩变形时,试验钢再结晶程度随变形温度、变形量的升高以及变形后保温时间的延长逐渐增大;变形温度越高、变形量越大,发生再结晶所需的保温时间越短;保温时间越长,再结晶晶粒长大越明显;轧制变形时,热轧板1/4厚度处更容易发生再结晶,随着轧制温度和变形量的升高,1050 ℃轧制变形25%时可在全厚度获得完全再结晶组织。

Effect of hot deformation on recrystallization behavior of niobium-bearing austenitic stainless steel 07Cr18Ni11Nb

Effect of hot deformation on recrystallization behavior of niobium-bearing austenitic stainless steel 07Cr18Ni11Nb was investigated by thermal simulated compression test and pilot hot rolling test. The results show that the recrystallization degree of the steel increases with the increase of deformation temperature, deformation amount and holding time. When the deformation temperature and deformation amount are higher, the holding time required for recrystallization is shorter. The longer the holding time, the more obvious the growth of recrystallized grains. During rolling deformation, recrystallization is easier to occur at the quarter thickness of hot-rolled plate. With the increase of rolling temperature and deformation amount, fully recrystallized grains can be obtained at 1050 ℃ with rolling deformation of 25%.