Transactions of Materials and Heat Treatment

Title：Thermal deformation behavior on 34CrNi3MoV steel

Authors： Zou Zhipeng1 Xu Dong1 2 Zheng Bing1 3 Wang Yiqun2 Wang Xuexi2 Zheng Lei4 5

Unit： 1.Technology Innovation Center for High Quality Cold Heading Steel of Hebei Province Hebei University of Engineering 2.Henan Zhongyuan Special Steel Equipment Manufacturing Co. Ltd. 3.School of Materials and Metallurgy University of Science and Technology Liaoning 4.Engineering Research Center for Wind Tower Steel of High Toughness of Hebei Province Heibei Puyang Iron and Steel Co. Ltd. 5.Technology Innovation Center for Wear Resistant Steel Plate of High Plasticity and Toughness of Hebei Province Hebei Puyang Iron and Steel Co. Ltd.

KeyWords： 34CrNi3MoV steel isothermal compression rheological stress constitutive equation strain compensation

ClassificationCode：TG142.1

year,vol(issue):pagenumber：2023,48(3):211-218

Abstract：

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 parameters α, 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.

Funds：

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)

作者简介：邹志鹏 (1987-)，男，硕士研究生 E-mail： zzp9963@163.com 通信作者：徐东 (1984-)，男，博士，教授，博士生导师 E-mail：xudong_xyz@163.com34CrNi3MoV

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