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通过热压缩试验研究了403(改型)马氏体不锈钢在不同变形温度、应变速率和变形量条件下的动态再结晶规律。结果表明,在一定的变形量条件下,变形温度越高,应变速率越小,材料更容易发生动态再结晶;变形量增加到一定程度时,应变硬化在变形过程中起主导作用。相同条件下,变形量越大,再结晶晶粒尺寸越小。同一试样的不同部位再结晶程度不同,等效应变越大的区域越容易发生动态再结晶。在同一变形量下,动态再结晶晶粒尺寸D与参数Z有如下关系,D=3007.64Z-0.19,Z=.ε.exp(367.293/RT)。
The dynamic recrystallization of 403 (modified) martensitic stainless steel under different deformation temperature, strain rate and deformation was studied by hot compression test. The results show that under a certain amount of deformation, the higher the deformation temperature, the smaller the strain rate, the more likely the material to undergo dynamic recrystallization. When the amount of deformation increases to a certain extent, the strain hardening plays a leading role in the deformation process. Under the same conditions, the larger the deformation, the smaller the recrystallized grain size. The same sample of different parts of the degree of recrystallization, the greater the equivalent strain greater dynamic recrystallization. Under the same deformation, the dynamic recrystallization grain size D has the following relation with the parameter Z, D = 3007.64Z-0.19, Z = .ε.exp (367.293 / RT).