文章摘要
胡丰泽,林军,陈文,等.34Cr2Ni2Mo 合金结构钢热本构方程研究[J].精密成形工程,2016,8(6):70-75.
HU Feng-ze,LIN Jun,CHEN Wen,et al.Constitutive Equation of 34Cr2Ni2Mo Alloy Structural Steel for Hot Working[J].Journal of Netshape Forming Engineering,2016,8(6):70-75.
34Cr2Ni2Mo 合金结构钢热本构方程研究
Constitutive Equation of 34Cr2Ni2Mo Alloy Structural Steel for Hot Working
投稿时间:2016-10-25  修订日期:2016-11-10
DOI:10.3969/j.issn.1674-6457.2016.06.013
中文关键词: 34Cr2Ni2Mo 钢  流动应力  内变量  本构方程
英文关键词: 34Cr2Ni2Mo steel  flow stress  internal variable  constitutive equation
基金项目:
作者单位
胡丰泽 海军装备部山西 大同 037036 
林军 1.国防科技工业精密塑性成形技术研究应用中心重庆 4000392.中国兵器工业第五九研究所重庆 400039 
陈文 中国兵器工业第五九研究所重庆 400039 
康凤 1.国防科技工业精密塑性成形技术研究应用中心重庆 4000392.中国兵器工业第五九研究所重庆 400039 
胡传凯 1.国防科技工业精密塑性成形技术研究应用中心重庆 4000392.中国兵器工业第五九研究所重庆 400039 
黄树海 1.国防科技工业精密塑性成形技术研究应用中心重庆 4000392.中国兵器工业第五九研究所重庆 400039 
陈强 1.国防科技工业精密塑性成形技术研究应用中心重庆 4000392.中国兵器工业第五九研究所重庆 400039 
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中文摘要:
      目的 基于实测的流动应力曲线,构建可用于热成形模拟的 34Cr2Ni2Mo 合金结构钢高精度本构方程。 方法 采用热模拟试验测试该材料的流动应力曲线,在动态再结晶的条件下,构建了基于物理机制的热本构方程,通过曲线拟合获得了本构方程参数。 结果 热模拟试验测试的流动应力曲线具有明显的动态再结晶现象,构建的本构方程包括流动应力、屈服/饱和/临界/稳态应力、发生 50%再结晶的时间等内变量计算方程,在参数拟合后对其误差分析表明,本构方程计算的流动应力偏差控制在±15 MPa以内。 结论 34Cr2Ni2Mo 合金结构钢本构方程能够较为准确的描述该钢在热成形过程的流动应力变化特征,具有较强的数值稳定性和外延拓展性。
英文摘要:
      The work aims to build the high-precision constitutive equation of 34Cr2Ni2Mo alloy structural steel used to simulate thermal forming based on the measured flow stress curves. The flow stress curves of the material were tested through the thermal simulation. The hot constitutive equation was built based on the physical mechanism under the conditions of dynamic recrystallization. The parameters of constitutive equation were obtained through curve fitting. The flow stress curves of the material tested through thermal simulation had obvious dynamic recrystallization. The constitutive equation included equations of internal variables, such as flow stress, yield/saturated/critical/steady stress and the time for occurrence of 50% recrystallization. After parameter fitting, the error analysis indicated that the flow stress deviation calculated by the constitutive equation should be controlled within ±15 MPa. The constitutive equation of 34Cr2Ni2Mo alloy structural steel can describe the change features of flow stress in the of forming process of the steel in a relatively correct manner, which is of good numerical stability and ex-tensionality.
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