0Cr18Mn18N0.6高氮无镍奥氏体不锈钢的变形与再结晶

Deformation and Recrystallization of 0Cr18Mn18N0.6 Nickel Free High Nitrogen Austenitic Stainless Steel

常压冶炼的0Cr18Mn18N0.6奥氏体不锈钢热轧板材经固溶处理(1150℃保温10 h)后进行了20%、25%、30%、35%、40%、42%塑性变形,并将42%变形量的试样在750、800、850、900℃进行了1 h的再结晶,对塑性变形及再结晶前后的组织进行分析,同时比较了硬度。结果表明,塑性变形以平面滑移为主,形成大量的滑移带组成的变形织构,在变形过程中退火孪晶是界面弯曲变形;变形量为42%的试样开始再结晶温度为750℃,终了再结晶温度为900℃;再结晶后晶粒细小,硬度提高了44%。

The plastic deformation （20%, 25%, 30%, 35%, 40%, 42%） of the hot rolled plate 0Cr 18Mn 18N0.6 austenitic stainless steel smelted by ordinary pressure after the solution treatment （1150 ℃ for 10 h） was carded out. And the recrystallization of 42% deformation of the sample was conducted at 750,800,850,900 ℃ for lh.The microstructures before and after plastic deformation and recrystallization were analyzed. At the same time, and the hardness was compared. The results show that the plastic deformation is mainly plane slip, which forms deformation texture with a large number of slip bands. And annealing twins are the bending deformation of the interface in the process of deformation. The initial recrystallization temperature of the sample with the 42% deformation is 750 ℃, and the finish recrystallization temperature is 900 ℃. The grain is fine and the hardness is increased by 44% after recrystallization