汽轮机材料1Cr12Ni2W1Mo1V超临界钢的热压缩流变应力行为  

Flow Stress Behavior of 1Cr12Ni2W1Mo1V Supercritical Steel for Steam Turbine Materials During Hot Compression

作　　者：张清郁[1] 李倩[1] 

机构地区：[1]河南工业贸易职业学院,河南郑州451191

出　　处：《热加工工艺》2016年第8期115-117,124,共4页Hot Working Technology

基　　金：河南省科学技术厅软科学研究计划项目(132400410718)

摘　　要：为研究不同工艺参数对汽轮机材料1Cr12Ni2W1Mo1V超临界钢高温变形行为的影响,在变形温度1000~1150℃,应变速率0.005~5 s^(-1)的条件下进行热压缩试验,得到了相应的真应力-真应变曲线。结果表明:1Cr12Ni2W1Mo1V超临界钢的高温流变应力对温度和应变速率比较敏感。通过双曲正弦本构方程和线性回归分析构建1Cr12Ni2W1Mo1V高温塑性变形的本构模型,并将流变应力的预测值与实验值进行比较,二者拟合程度高,表明该模型能较好描述该钢在热变形过程中的流动行为。In order to study the effect of different process parameters on the high temperature deformation behavior of 1Crl2Ni2WlMolV supercritical steel, for steam turbine materials, the hot compression experiment of the steel was investigated at 1000-1150℃ and strain rate of 0.005-5 s-1on Gleeble-1500 thermo-simulation machine, and the corresponding true stress-truestrain curves were obtained. The results show that the high-temperature flow stress of the steel is sensitive to temperature and strain rate. The constitutive equation of the steel at elevated temperature can be obtained by Hyperbolic sine constitutive equation and linear regression analysis, and the agreement between predicted result and experiment data of flow stress is good, which shows that the model can describe the flow behavior of the steel during thermal deformation.

关 键 词：1Cr12Ni2W1Mo1V超临界钢 高温变形 本构模型 线性回归分析 

分 类 号：TG113.25[金属学及工艺—物理冶金]