论文部分内容阅读
利用Gleeble热模拟压缩实验,研究316LN奥氏体不锈钢在温度950℃~1250℃、应变速率0.001s-1~1.0s-1下的高温变形特征,并测得相应的流动应力曲线。对实验数据进行计算拟合,建立加工硬化-动态回复和动态再结晶“两阶段”高温流动应力模型、动态再结晶百分数及晶粒尺寸模型。将所建模型写入有限元软件进行数值模拟,其结果与实验吻合,说明该模型准确可靠,可用于316LN热变形过程的数值模拟。
Using Gleeble thermal simulation compression experiment, the deformation characteristics of 316LN austenitic stainless steel at 950 ℃ ~ 1250 ℃ and strain rate of 0.001s-1 ~ 1.0s-1 were studied and the corresponding flow stress curves were obtained. The experimental data were calculated and fitted to establish the work hardening - dynamic recovery and dynamic recrystallization “two stage ” high temperature flow stress model, dynamic recrystallization percentage and grain size model. The model was written into the finite element software for numerical simulation, and the results were in good agreement with the experiment, which shows that the model is accurate and reliable and can be used in the numerical simulation of 316LN thermal deformation process.