调质钢07MnNiCrMoVDR低温热变形行为研究  

Research of Hot Deformation Behavior in Low Temperature Region for 07MnNiCrMoVDR Steel After Quenched and Tempered

作　　者：周家林[1] 杨光宇[1] 张陪毅 余茹[1] 黄大军[2] 代元[2] 

机构地区：[1]武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室,湖北武汉430081 [2]武汉钢铁股份有限公司,湖北武汉430080

出　　处：《热加工工艺》2016年第6期56-59,共4页Hot Working Technology

摘　　要：利用Gleeble-1500热模拟试验机对调质钢07MnNiCrMoVDR在变形温度400~750℃、变形速率为0.01~0.1s-1下进行低温热变形模拟试验,获得不同变形条件下的流动应力-应变曲线。对试验数据进行分析,确定了影响流动应力的主要因素。通过试验结果计算拟合了模型参数,并根据Sellars-Tegart的方程分别建立低温区加工硬化-动态回复和动态再结晶流动应力模型。该模型能预测低温流动应力,完整地表示07MnNiCrMoVDR钢低温流动应力模型。将模型应用于中厚板矫直力计算,预测值与实测值吻合较好。The low temperature hot compression behaviors of 07MnNiCrMoVDR quenched and tempered steel at 400- 750℃ and strain rate of 0.01-0.1 s-1 were investigated by isothermal compression test on Gleeble-1500 thermal mechanical simulator. The flow stress-srain curves can be obtained under different deformation conditions. The experimental data were analyzed to determine the main factors influencing the flow stress. The model parameters were calculated by experimental data. The flow stress models at work harding-dynamical recovery stage and dynamical recrystallization stage at low temperature region were both established based on Sellars-Tegart equations. The models can accurately predict the low temperature flow stress and completely express flow stress model for 07MnNiCrMoVDR steel at low temperature. The model was applied to calculate straightening force of the plate, and the predicted value matches well with the measured value.

关 键 词：07MNNICRMOVDR钢 低温 热变形 流动应力 

分 类 号：TG113[金属学及工艺—物理冶金]