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| 含铌奥氏体不锈钢AISI 347流变应力曲线及本构方程 | |
| 引用本文： | 李红,罗海文,方旭东.含铌奥氏体不锈钢AISI 347流变应力曲线及本构方程[J].塑性工程学报,2008,15(5). |
| 作者姓名： | 李红 罗海文 方旭东 |
| 作者单位： | 1. 安泰科技股份有限公司技术中心,北京,100081 2. 钢铁研究总院结构所,北京,100081 3. 太原钢铁集团公司技术中心,太原,030003 |
| 基金项目： | 太原钢铁集团与钢铁研究总院合作项目 |
| 摘 要： | 采用热模拟实验分析了含铌奥氏体不锈钢347在不同变形条件的应力曲线特征,发现含铌奥氏体不锈钢高温下具有明显的加工硬化应力曲线特征,通过修正MEDINA模型建立了应力与变形条件的数学模拟关系,使得该不锈钢更能符合加工硬化特征型曲线,从而为预报含铌奥氏体不锈钢轧制载荷的预报奠定基础。 |
| 关 键 词： | 含铌奥氏体不锈钢 应力应变曲线 加工硬化 热轧 |
Constitutive analysis in the hot working of Nb heavily alloyed stainless steel |
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| LI Hong,LUO Hai-wen,FANG Xu-dong.Constitutive analysis in the hot working of Nb heavily alloyed stainless steel[J].Journal of Plasticity Engineering,2008,15(5). | |
| Authors: | LI Hong LUO Hai-wen FANG Xu-dong |
| Abstract: | Hot working of AISI 347 SS was simulated by the uniaxial compression tests in a thermo mechanic simulator,Thermecmaster Z.Its stress-strain curves were measured at the various strain rates and deformation temperatures.All flow curves,at temperatures between 970℃～1230℃ and strain rates of 0.04/s～40/s,show a typical characteristics of work hardening,i.e.stress increases with increasing strain without a peak stress observed.Numerical simulations on these flow curves shows that they can not be simulated by the well known equation in the literature σHW=σ0+B1-exp(-cε)]m,but by a modified one σ=B1-exp(-cε)]m+k(ε-εs),which has been developed in this paper to describe the flow curves for the hot working of AISI 347 SS. |
| Keywords: | Nb-alloyed austenitic stainless steel stress-strain curves hard working hot rolling |
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