Fe-0.2C-7Mn中锰钢的单道次热压缩变形行为及热加工图
Single-Pass Hot Compression Deformation Behavior and Processing Map ofFe-0.2C-7Mn Medium Mn Steel
摘 要
采用Gleeble-3500型热模拟试验机对Fe-0.2C-7Mn中锰钢进行单道次等温压缩试验，研究了该钢在不同变形温度（950~1 150℃）和应变速率（0.001~1 s-1）下的热变形行为，通过计算应变速率敏感指数、功率耗散效率以及失稳参数建立该钢的热加工图，并获得最佳的热加工工艺窗口。结果表明：随着应变速率的增加和变形温度的降低，该钢的流变应力增大；高变形温度和低应变速率有利于动态再结晶的发生，动态再结晶程度的差异会对应变速率敏感指数产生很大的影响；不同真应变下的失稳区均出现在高温高应变速率区域，并且基本与功率耗散图中的低功率耗散效率区域重合。试验钢的最佳热加工工艺窗口为变形温度975~1 100℃、应变速率0.006~1 s-1。
热变形行为
热加工图
动态再结晶
Fe-0.2C-7Mn medium Mn steel
hot deformation behavior
processing map
dynamic recrystallization
Abstract
The hot deformation behavior of Fe-0.2C-7Mn medium Mn steel at different deformation temperatures (950-1 150℃) and strain rates (0.001-1 s-1) was investigated by single-pass isothermal compression tests on Gleeble-3500 thermal-mechanical simulator. The processing map of the steel was established by calculating the strain rate sensitivity index, power dissipation efficiency and instability parameters, and the best process window was obtained. The results show that the flow stress of the steel increased with increasing strain rate or decreasing deformation temperature. High deformation temperatures and low strain rates were conducive to the occurrence of dynamic recrystallization. The difference of dynamic recrystallization degree had great influence on strain rate sensitivity index. The instability regions at different true strains appeared in the region of high deformation temperatures and high strain rates, and basically coincided with the low power dissipation efficiency region in the power dissipation map. The best process window for the test steel was deformation temperature of 975-1 100℃ and strain rate of 0.006-1 s-1.
中图分类号 TG335 DOI 10.11973/jxgccl202302016
所属栏目 物理模拟与数值模拟
基金项目 国家重点研发计划项目（2017YFB0304402）
收稿日期 2021/12/15
修改稿日期 2022/11/15
网络出版日期
作者单位点击查看
备注汪杨(1993-),男,安徽蚌埠人,博士研究生
引用该论文: WANG Yang,CEN Qiongying,WANG Weijun,ZHANG Mei. Single-Pass Hot Compression Deformation Behavior and Processing Map ofFe-0.2C-7Mn Medium Mn Steel[J]. Materials for mechancial engineering, 2023, 47(2): 90～95
汪杨,岑琼瑛,王魏军,张梅. Fe-0.2C-7Mn中锰钢的单道次热压缩变形行为及热加工图[J]. 机械工程材料, 2023, 47(2): 90～95
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【4】阳锋, 罗海文, 董瀚.退火温度对冷轧7Mn钢拉伸行为的影响及模拟研究[J].金属学报, 2018, 54(6):859-867. YANG F, LUO H W, DONG H.Effects of intercritical annealing temperature on the tensile behavior of cold rolled 7Mn steel and the constitutive modeling[J].Acta Metallurgica Sinica, 2018, 54(6):859-867.
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【6】ZHAN W, CAO L Q, HU J, et al.Intercritical rolling induced ultrafine lamellar structure and enhanced mechanical properties of medium-Mn steel[J].Journal of Iron and Steel Research, International, 2014, 21(5):551-558.
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【8】MALAS J C, SEETHARAMAN V.Using material behavior models to develop process control strategies[J].JOM, 1992, 44(6):8-13.
【9】LIAO H C, WU Y N, ZHOU K X, et al.Hot deformation behavior and processing map of Al-Si-Mg alloys containing different amount of silicon based on Gleebe-3500 hot compression simulation[J].Materials & Design, 2015, 65:1091-1099.
【10】REN F C, CHEN F, CHEN J, et al.Hot deformation behavior and processing maps of AISI 420 martensitic stainless steel[J].Journal of Manufacturing Processes, 2018, 31:640-649.
【11】LI X, SONG R B, KANG T, et al.Hot deformation and dynamic recrystallization behavior of Fe-8Mn-6Al-0.2C steel[J].Materials Science Forum, 2017, 898:797-802.
【12】SUN X Y, ZHANG M, WANG Y, et al.Kinetics and numerical simulation of dynamic recrystallization behavior of medium Mn steel in hot working[J].Steel Research International, 2020, 91(7):1900675.
【13】WANG Y, ZHANG M, SUN X Y.Investigation on high temperature compression deformation behavior of 0.2C7Mn steel[J].Procedia Manufacturing, 2019, 37:327-334.
【14】ZHU D L, ZHANG M, WANG Y.Electron backscattered diffraction study of microstructural evolution during isothermal deformation of high-N Mn18Cr18 alloy[J].Metallurgical and Materials Transactions B, 2019, 50(4):1662-1673.
【15】SUN Y, FENG X Y, HU L X, et al.Characterization on hot deformation behavior of Ti-22Al-25Nb alloy using a combination of 3D processing maps and finite element simulation method[J].Journal of Alloys and Compounds, 2018, 753:256-271.
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