Transactions of Materials and Heat Treatment

Title：Dynamic recrystallization behavior and grain size prediction on 30Cr1MoV steel for high and medium pressure rotors

Authors： Pang Jin He Wenwu Zhao Jinhua Yang Bin

Unit： School of Materials Science and Engineering Taiyuan University of Science and Technology

KeyWords： 30Cr1MoV steel dynamic recrystallization deformation temperature grain size microstructure

ClassificationCode：TG142.5

year,vol(issue):pagenumber：2024,49(8):239-248

Abstract：

In order to study the dynamic recrystallization rule of 30Cr1MoV steel for high and medium pressure rotors during thermal deformation process, the uniaxial compression test was carried out by thermal simulation tester Gleeble-1500D under the deformation temperature of 900-1200 ℃, the strain rate of 0.01-1 s-1, and the true strain of 0.693, and the test data were organized and plotted to obtain the true stress-true strain curve for 30Cr1MoV steel. Then, the characteristic values on the curve were collected, and the material coefficients were calculated by linear fitting to construct the constitutive equation and dynamic recrystallization kinetic model of 30Cr1MoV steel. Furthermore, the average grain size was measured from the metallographic photographs of specimens, and a dynamic recrystallization grain size model was established, which was imported into the material library of software Deform-3D for uniaxial compression forming simulation. The results show that the error between the simulation and test results is controlled within 8%, which verifies the accuracy of the dynamic recrystallization model and indicates that the dynamic recrystallization behavior of 30Cr1MoV steel can be effectively predicted by this model in the subsequent process tests.

Funds：

山西省重点学科建设经费资助项目（2019KJ029）

作者简介：庞锦（1997-），男，硕士研究生 E-mail：aniu19970418@126.com 通信作者：何文武（1977-），男，博士，教授 E-mail：hwwssl@126.com

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