Fe-3.0% Si-0.09% Nb取向硅钢的高温流变应力
High Temperature Flow Stress of Fe-3.0%Si-0.09%Nb Oriented Silicon Steel
摘 要
通过热模拟试验机测定了Fe-3.0% Si-0.09% Nb取向硅钢在不同变形温度和应变速率下的真应力-真应变曲线，分析了变形参数对流变应力的影响规律，通过线性回归分析计算出该取向硅钢的热变形应力指数n以及变形激活能Q，并构建了流变应力本构方程。结果表明：该取向硅钢的真应力-真应变曲线为动态回复型，其变形时的流变应力主要取决于变形温度和应变速率；当应变速率一定时，流变应力随着变形温度的升高而减小；变形温度一定时，流变应力随着应变速率的增大而增大；用构建的Fe-3.0% Si-0.09% Nb取向硅钢流变应力本构方程计算得到的流变应力与通过试验测得的结果相吻合。
真应力-真应变曲线
流变应力
本构方程
oriented silicon steel
true stress-true strain curve
flow stress
constitutive equation
Abstract
The true stress-true strain curve of Fe-3.0%Si-0.09%Nb oriented silicon steel was tested by thermal simulator at different deformation temperatures and strain rates. The influence of deformation parameters on flow stress was analyzed. The thermal deformation stress exponent n and deformation activation energy Q were calculated and the flow stress constitutive equation was established by linear-regression analysis. The results show that the true stress-true strain curve of the oriented silicon steel was a type of dynamic recovery, and the flow stress during deformation mainly depended on the deformation temperature and strain rate. When the strain rate was constant, the flow stress decreased with the increase of deformation temperature and the flow stress increased with the increase of strain rate when the deformation temperature was constant. The flow stress calculated by the constitutive equation of flow stress of Fe-3.0%Si-0.09%Nb oriented silicon steel was in good agreement with that measured by the test.
中图分类号 TG142 DOI 10.11973/jxgccl201712002
所属栏目 试验研究
基金项目 国家自然科学基金资助项目（51274083，51674123）；河北省高等学校创新团队领军人才培育计划项目（LJRC007）；河北省自然科学基金资助项目（E2015209228）
收稿日期 2016/10/11
修改稿日期 2017/9/23
网络出版日期
作者单位点击查看
备注李洋(1991-),男,河北邢台人,硕士研究生
引用该论文: LI Yang,FENG Yunli,YANG Dengcui,ZHANG Sijia,YANG Sen. High Temperature Flow Stress of Fe-3.0%Si-0.09%Nb Oriented Silicon Steel[J]. Materials for mechancial engineering, 2017, 41(12): 7～10
李洋,冯运莉,杨登翠,张思佳,杨森. Fe-3.0% Si-0.09% Nb取向硅钢的高温流变应力[J]. 机械工程材料, 2017, 41(12): 7～10
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【4】李红斌, 郑明月, 田伟, 等. 基于Johnson-Cook模型构建M50NiL齿轮钢的流变应力本构方程[J].机械工程材料, 2016, 40(11):31-37.
【5】刘诗安, 孟显娜, 金能萍, 等. 7056铝合金高温热压缩流变应力行为[J]. 热加工工艺, 2009, 38(24):27-29.
【6】李军, 孙颖, 赵宇, 等. 取向硅钢低温铸坯加热技术的研发进展[J]. 钢铁, 2007, 42(10):72-73.
【7】刘光穆.电工钢的生产开发现状和发展趋势[J]. 特殊钢, 2005, 26(1):38-38.
【8】许学勇, 项利, 孙颖, 等. 薄板坯连铸连轧生产取向电工钢模拟实验[J]. 钢铁研究学报, 2008, 20(4):25-25.
【9】尹晓盼. 含铌取向硅钢热轧和常化过程中抑制剂的固溶析出行为[D]. 唐山:华北理工大学,2015.
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【12】DAN W J, ZHANG W G, LI S H,et al. A model for strain-induced martensitic transformation of TRIP steel with strain rate[J].Computational Materials Science,2007,40(1):101-107.
【13】郭道强, 孟显娜, 张辉. Al-Mn-Mg-RE铝合金高温热压缩变形行为的研究[J]. 热加工工艺, 2012, 41(2):91-94.
【14】KOWALSKI B, SELLARS C M, PIETRZYK M. Development of a computer code for the interpretation of results of hot plane strain compression tests[J]. Isij International, 2000, 40(12):1230-1236.
【15】刘晓艳, 潘清林, 何运斌, 等. Al-Cu-Mg-Ag合金热压缩变形的流变应力行为和显微组织[J]. 中国有色金属学报, 2009, 19(2):201-207.
【16】李长生, 韩斌, 曹丽梅, 等. Fe-1.6%Si无取向硅钢的热变形与相变规律[J]. 机械工程材料, 2010,34(11):95-98.
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