34CrNi3MoV钢的热变形行为  

Thermal deformation behavior on 34CrNi3MoV steel

作　　者：邹志鹏 徐东[1,2] 郑冰 王怡群[2] 王学玺 郑磊 Zou Zhipeng;Xu Dong;Zheng Bing;Wang Yiqun;Wang Xuexi;Zheng Lei(Technology Innovation Center for High Quality Cold Heading Steel of Hebei Province,Hebei University of Engineering,Handan 056038,China;Henan Zhongyuan Special Steel Equipment Manufacturing Co.,Ltd.,Jiyuan 459008,China;School of Materials and Metallurgy,University of Science and Technology Liaoning,Anshan 114051,China;Engineering Research Center for Wind Tower Steel of High Toughness of Hebei Province,Heibei Puyang Iron and Steel Co.,Ltd.,Handan 056305,China;Technology Innovation Center for Wear Resistant Steel Plate of High Plasticity and Toughness of Hebei Province,Hebei Puyang Iron and Steel Co.,Ltd.,Handan 056305,China)

机构地区：[1]河北工程大学河北省高品质冷镦钢技术创新中心,河北邯郸056038 [2]河南中原特钢装备制造有限公司,河南济源459008 [3]辽宁科技大学材料与冶金学院,辽宁鞍山114051 [4]河北普阳钢铁有限公司,河北省高韧性风塔钢工程研究中心,河北邯郸056305 [5]河北普阳钢铁有限公司,河北省高塑韧性耐磨钢板技术创新中心,河北邯郸056305

出　　处：《锻压技术》2023年第3期211-218,共8页Forging & Stamping Technology

基　　金：国家自然科学基金联合基金资助项目(NSFC)(U20A20272);河北省军民科技协同创新专项(22351001D);邯郸市科学研究计划重点项目(21122015004);河北省高等学校科学技术研究项目(CXY2023004)。

摘　　要：为分析34CrNi3MoV钢的热变形行为,采用Gleeble-1500热模拟试验机进行等温热压缩试验,设置变形温度为800~1200℃、应变速率为0.01~10 s^(-1),获得相应的流变应力曲线。分析了流变应力对变形参数的敏感性,计算了不同应变量下材料参数α、n、Q和A的值,并利用五阶多项式拟合了各材料参数与应变量的对应关系。采用应变补偿的Arrhenius模型对34CrNi3MoV钢的高温流动应力本构方程进行回归。结果表明:34CrNi3MoV钢在变形温度为1000~1200℃、应变速率为0.01~1 s^(-1)时出现较为明显的动态再结晶曲线特征,并随着应变速率的降低和变形温度的升高,峰值应力越明显。本构方程预测的流动应力与试验结果的吻合度较好,在整个试验范围内的平均相对误差Rav仅为5.52%,表明所构建的模型是可靠的。In order to analyze the thermal deformation behavior of 34CrNi3MoV steel,the isothermal thermal compression tests were conducted on Gleeble-1500 thermo-mechanical simulator with the deformation temperature of 800-1200℃and the strain rate of 0.01-10 s^(-1),the corresponding rheological stress curves were obtained.Then,the sensitivity of rheological stress to deformation parameters was analyzed,and the values of material parametersα,n,Q and A under different strain amounts were calculated.Furthermore,the corresponding relationship between each material parameter and strain amount was fitted by the fifth-order polynomial,and the high-temperature rheological stress constitutive equation of 34CrNi3MoV steel was regressed by the strain-compensated Arrhenius model.The results show that the dynamic recrystallization curve characteristics of 34CrNi3MoV steel is obvious when the temperature is 1000-1200℃and the strain rate is 0.01-1 s^(-1),and the peak stress becomes more obvious with the decreasing of strain rate and the increasing of deformation temperature.The rheological stress predicted by the constitutive equation has a high agreement with the test results,and the average relative error Rav in the entire test range is only 5.52%,which indicates that the constructed model is reliable.

关 键 词：34CrNi3MoV钢 等温压缩 流变应力 本构方程 应变补偿 

分 类 号：TG142.1[一般工业技术—材料科学与工程]