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在变形量为60%,应变速率为0.01~0.1 s-1,变形温度为950~1100℃的条件下,利用Gleeble-1500D热模拟机对不同成分316不锈钢进行了单道次压缩试验,通过分析真应力-真应变曲线、变形后组织、热变形激活能,得到增氮降镍对试验钢热变形行为的影响。结果表明,在热变形条件下,试验钢均发生了动态再结晶;增氮降镍后,提高了试样的变形抗力,其热变形激活能显著增加,由420.26 k J·mol-1分别提高到514.28和473.7 k J·mol-1,抑制了动态再结晶的发生。
Under the conditions of 60% deformation rate, 0.01-0.1 s-1 strain rate and 950 ~ 1100 ℃ deformation temperature, single-pass compression tests were conducted on 316 stainless steel with Gleeble-1500D thermal simulator. The true stress-true strain curve, the deformed tissue and the thermal deformation activation energy were obtained, and the effect of increasing nitrogen and reducing nickel on the hot deformation behavior of the test steel was obtained. The results show that the dynamic recrystallization of the test steels occurs under the hot deformation conditions. After increasing the amount of nitrogen and reducing the nickel, the deformation resistance of the test specimens increases, and the thermal deformation activation energy of the test steels increases significantly from 420.26 kJ · mol-1 To 514.28 and 473.7 kJ · mol-1, inhibited the occurrence of dynamic recrystallization.