新型含铝Fe-Cr合金的热变形行为及热加工图
Hot Deformation Behavior and Processing Map of Novel Fe-Cr Alloy Containing Aluminum
孙胜英 1孙锦超 2杨鑫 3梁顺星 1张喜亮 1刘宏基1
作者信息
- 1. 河北工程大学材料科学与工程学院,邯郸 056038;河北省高强韧耐磨金属材料重点实验室,邯郸 056038
- 2. 太原工业学院计算机工程系,太原 030013
- 3. 河北工程大学材料科学与工程学院,邯郸 056038
- 折叠
摘要
采用Gleeble-3500热模拟试验机对Fe-18Ni-12Cr-3Al合金进行压缩试验,其变形温度为925～1 175℃、应变速率为0.01～10 s-1.分析了合金真应力-真应变曲线,建立了本构方程及热加工图,并结合θ-σ曲线上的拐点,采用拐点法研究其动态再结晶的临界条件.结果表明,Fe-18Ni-12Cr-3Al合金应力随着应变速率增加和变形温度降低而升高,发生动态再结晶的临界应力和峰值应力之间具有相关性,即σc= 0.95σp.依据热本构方程和热加工图,热激活能为 376.1 kJ/mol,应变为 0.1 时的最佳热加工区域是变形温度为1 110～1 160℃,应变速率为0.01～1 s-1.
Abstract
The compression test was conducted on Fe-18Ni-12Cr-3Al alloy by Gleeble-3500 thermal simulator in tem-perature range of 925～1 175℃and strain of 0.01～10 s-1.The true stress-strain curve was analyzed,and the constitu-tive equation as well as thermal processing map was established.The critical conditions of dynamic recrystallization were investigated by inflection point method based on θ-σ curve.The results indicate that the flow stress of Fe-18Ni-12Cr-3Al alloy is increased significantly with increasing in strain rate and decreasing in deformation temperature.There exits a correlation between the critical stress and peak stress for dynamic recrystallization of the alloy,which is σc= 0.95σp.According to the constitutive equation and thermal processing map,the activation energy is 376.1 kJ/mol,and the optimal processing domain are determined in temperature range of 1 110～1 160℃and strain of 0.01～1 s-1.
关键词
Fe-18Ni-12Cr-3Al合金/热变形行为/本构方程/热加工图Key words
Fe-18Ni-12Cr-3Al Alloy/Hot Deformation Behavior/Constitutive Equation/Thermal Processing Map引用本文复制引用
基金项目
2023年邯郸市科技局市级科技研发计划资助项目()
出版年
2024
NETL
NSTL
万方数据