锻压技术

316LN钢亚动态再结晶行为

英文标题：Metadynamic recrystallization behavior of 316LN steel

作者：李景丹刘建生焦永星

单位：太原科技大学

分类号：TG316

出版年,卷(期):页码：2019,44(8):176-181

摘要：

采用Gleeble-1500D热模拟实验机对316LN不锈钢在变形温度为1050~1150 ℃、应变速率为0.01~1 s-1、道次间隔时间为 10~60 s条件下，进行双道次热压缩实验，研究了316LN钢的亚动态再结晶行为。实验结果表明，在所有实验条件下，该材料均发生明显的亚动态再结晶。通过金相显微组织的观察结果可知，变形温度、应变速率、道次间隔时间对晶粒组织的影响十分显著，随着变形温度的升高、应变速率的增加以及道次间隔时间的延长，材料的软化程度在不断增大，晶粒组织也更均匀。基于实验获得的双道次压缩应力-应变曲线，建立了316LN钢的亚动态再结晶动力学模型，通过模型预测值与实验值的对比可知，该模型具有较高精度。

The doublepass hot compression tests were conducted by Gleeble-1500D thermal simulator under the conditions of deformation temperature of 1050-1150 ℃, strain rate of 0.01-1 s-1 and pass interval time of 10-60 s, and the meta-dynamic recrystallization behavior of 316LN stainless steel was studied. The experimental results show that the material undergoes obvious meta-dynamic recrystallization under all experimental conditions, and the influences of the deformation temperature, strain rate and pass interval time on microstructure are very significant by metallographic observations. With the increasing of deformation temperature, strain rate and pass interval time, the softening degree of material increases, and the grain structure becomes more uniform. Furthermore, based on the strainstress curves obtained from compression tests, the metadynamic recrystallization kinetics model of 316LN steel is established. Comparing with the predicted values and the experimental values, the model is of high accuracy.

基金项目：

山西省自然科学基金资助项目（201601D011002）

作者简介：李景丹（1989-），女，博士研究生 E-mail：929949477@qq.com 通讯作者：刘建生（1958-），男，博士，教授 E-mail：jiansliu@163.com

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