Research status of inclusions in bearing steel and discussion on non-alloy deoxidation process
Lei Cao1,2, Li-guang Zhu3, Zhi-hong Guo3
1 School of Metallurgy and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China 2 Materials Engineering Department, Hebei Vocational University of Industry and Technology, Shijiazhuang 050091, Hebei, China 3 Department of Materials Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050090, Hebei, China
Abstract：Non-metallic inclusion in steel is a very key factor affecting the fatigue life and quality stability of high-quality bearing steel. Inclusions mainly affect the fatigue life and toughness of the material by affecting the continuity of the steel matrix, thereby endangering the safety and stability of the equipment. The research progress of inclusion formation, removal and modification was discussed. Based on the current research status of Al deoxidation or Si deoxidation process, the feasibility of non-alloy deoxidation process for high-quality bearing steel was proposed and discussed. C or H2 is used as non-alloy deoxidizer, and the deoxidation products are CO and H2O gases, which are easy to be removed from the molten steel. There are few studies on the non-alloy deoxidation process, especially the research and application of C or H2 deoxidation for high-quality bearing steel. However, the non-alloy deoxidation process is of great significance for reducing oxygen content and improving cleanliness of high-quality bearing steel. Therefore, it is necessary to study the mechanism and kinetics of C and H2 deoxidation and analyze the factors affecting deoxidation effect systematically, so as to provide a solid theoretical basis for the practice of non-alloy deoxidation process for high-quality bearing steel.
Lei Cao,Li-guang Zhu,Zhi-hong Guo. Research status of inclusions in bearing steel and discussion on non-alloy deoxidation process[J]. Journal of Iron and Steel Research International, 2023, 30(1): 1-20.
2023, Vol. 30 
