A model for converting thermal analysis to volume fraction of high carbon bearing steels during low-temperature tempering  

作　　者：Qinglong Liu Junyu Tian Wenting Wei 

机构地区：[1]The State Key Laboratory of Refractories and Metallurgy,The Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education,Wuhan University of Science and Technology,Wuhan 430081,China [2]School of Automotive Engineering,Wuhan University of Technology,Wuhan 430070,China [3]Hubei Key Laboratory of Advanced Technology for Automotive Components(Wuhan University of Technology),Wuhan 430070,China [4]Hubei Collaborative Innovation Center for Automotive Components Technology,Wuhan 430070,China

出　　处：《Journal of Materials Science & Technology》2023年第5期212-222,共11页材料科学技术（英文版）

基　　金：This work was financially supported by the National Natural Science Foundation of China(Nos.51605355 and 52104381);the National Key R&D Program of China(No.2020YFA0714900);“111 Project”(No.B17034);the Innovative Research TeamDevelopment Program of Ministry of Education of China(No.IRT_17R83);the China Postdoctoral Science Foundation(No.2021M702539)and the State Key Laboratory for Advanced Metals and Materials.

摘　　要：Quantitative prediction of phase content is of great importance to control and optimize the heat treat-ment process of steels.In this work,a model for predicting the phase content of tempered high carbon steels was proposed by taking a martensitic 100Cr6 bearing steel as a model case.The microstructural transformations during tempering were studied using thermal analysis,transmission electron microscopy(TEM),and X-ray diffraction(XRD).Kinetics analysis of thermal evolution by employing the isoconver-sional method,and assisted by TEM and XRD characterization,were performed to quantitatively estimate the volume fractions of different phases after tempering.A series of isothermal tempering experiments were designed to verify the model.The predicted results were in good agreement with the experimental results of XRD and electrolytic extraction measurements.

关 键 词：Bearing steel Martensite tempering Retained austenite Thermal analysis KINETICS 

分 类 号：TG142.1[一般工业技术—材料科学与工程]