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。
Hot working of AISI 347SS was simulated by the uniaxial compression tests in a thermo mechanic simulator, Ther-mecmaster 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＋B[1-exp（-Cε）]^m, but by a modified one σ=B[1-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.
出处
《塑性工程学报》
EI
CAS
CSCD
北大核心
2008年第5期1-5,16,共6页
Journal of Plasticity Engineering
基金
太原钢铁集团与钢铁研究总院合作项目:AISI347不锈钢热加工特性研究
关键词
含铌奥氏体不锈钢
应力应变曲线
加工硬化
热轧
Nb-alloyed austenitic stainless steel； stress-strain curves； hard working； hot rolling
作者简介
李红：E-mail：honglzh1@tom.com；女，1976年生，安泰科技股份有限公司技术中心，从事钢材热加工数值模拟等研究。
