15CrMoR钢热变形本构方程的研究  

Study on Constitutive Equation of Hot Deformation of 15CrMoR Steel

作　　者：赵广辉[1] 黄庆学[1] 周存龙[1] 王效岗[1] 马立峰[1] 

机构地区：[1]山西省冶金设备设计理论与技术重点实验室太原科技大学,山西太原030024

出　　处：《热加工工艺》2016年第5期1-6,共6页Hot Working Technology

基　　金：国家重点基础研究规划(973计划)预研专项项目(2012CB722-801);国家青年科学基金项目(51205269);山西省基础研究项目(2011021019-4)

摘　　要：为了分析15Cr Mo R钢的高温变形行为,在Gleeble-1500D热模拟试验机上对其进行了热压缩实验。依据不同温度和不同应变速率下的实验数据,通过把Zener-Hollomon参数和材料参数的函数导入Arrhenius-type方程,建立了15Cr Mo R钢的本构方程。结果表明:测试的流变应力曲线类型为平稳类型和单峰类型,但其试样组织均发生了动态再结晶;使用建立的本构方程计算的流变应力值与实验结果有很好的一致性(相关系数R=0.9273和平均相对误差AARE=2.14%)。In order to analyze the high temperature deformation behavior of 15 Cr Mo R steel, hot compression tests were conducted on Gleeble 1500 D thermal simulation test machine. Based on the experimental data at different temperatures and different strain rates, the constitutive equation of 15 Cr Mo R steel was established by importing the Zener-Hollomon parameter and material parameter functions into Arrhenius-type equation. The results show that the flow stress curves of the tests are stationary and the single peak types, but the dynamic recrystallization occurs in the samples; the flow stress values calculated by using the established constitutive equation are in good agreement with the experimental results（correlation coefficient R=0.9273 and average relative error AARE=2.14%）.

关 键 词：15CRMOR钢 热变形 流变行为 本构模型 

分 类 号：TG306[金属学及工艺—金属压力加工]