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利用Gleeble-1500热/力模拟机进行等温压缩实验,研究了15Cr-25Ni-Fe基合金在变形温度为950～1200℃,变形速率为0.1s-1和10s-1条件下的热变形行为,并将变形试样在980℃保温2h后空冷,对比变形试样固溶前后显微组织。结果表明:随着变形温度的升高,变形组织即动态再结晶晶粒逐渐增大;在1075～1100℃和10s-1及1050～1100℃和0.1s-1条件下变形的试样经固溶处理后晶粒发生粗化,这在一定程度上会影响合金的热加工性能。因此热加工中要避免工件处于上述变形条件,否则对组织控制极为不利。
The isothermal compression experiments of the 15Cr-25Ni-Fe-based alloy were carried out by using the Gleeble-1500 thermal / mechanical simulator. The thermal deformation behavior of the 15Cr-25Ni-Fe based alloy was investigated at deformation temperatures of 950-1200 ℃ and deformation rates of 0.1s-1 and 10s- The deformed specimens were air-cooled at 980 ℃ for 2h, and compared with the deformed specimens before and after solid solution. The results show that with the increase of deformation temperature, the dynamic recrystallization grains gradually increase in the deformed structure. The specimens deformed at 10s-1, 10s-1 and 1050 ~ 1100 ℃ and 0.1s-1 The grain coarsening after solution treatment, which will affect the hot workability of the alloy to a certain extent. Therefore, to avoid the workpiece in hot working in the above deformation conditions, or on organizational control is extremely unfavorable.