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Yan H.,Taiyuan University of Science and Technology | Yan H.,Shanxi Key Laboratory of Metallic Materials Forming Theory and Technology | Hu Y.,Shanxi Key Laboratory of Metallic Materials Forming Theory and Technology | Li Y.,Shanxi Key Laboratory of Metallic Materials Forming Theory and Technology
Tezhong Zhuzao Ji Youse Hejin/Special Casting and Nonferrous Alloys | Year: 2016

The centrifugal casting process for 42CrMo bearing ring was simulated, and the main casting process parameters were designed. And then, the experiment was carried out by centrifugal casting method, and the microstructure and mechanical properties of cast blank were analyzed. The results show that the numerical simulation results are accordant with the experimental ones. The ring casting blank prepared by centrifugal casting exhibits excellent mechanical properties. © 2016, Journal Office of Special Casting and Nonferrous Alloys. All right reserved.


Qin F.-C.,Taiyuan University of Science and Technology | Qin F.-C.,Shanxi Key Laboratory of Metallic Materials Forming Theory and Technology | Li Y.-T.,Taiyuan University of Science and Technology | Li Y.-T.,Shanxi Key Laboratory of Metallic Materials Forming Theory and Technology
Cailiao Rechuli Xuebao/Transactions of Materials and Heat Treatment | Year: 2015

Heating specification of Q235 steel ring blank before rolling is critical to its rolling process and microstructure evolution. The effects of heating temperature and holding time on austenite grain growth behavior of Q235 steel were studied in the temperature range of 950-1200℃. The microstructure and mean austenite grain size of the steel were observed and measured by linear intercept method on a ZEISS metallographic microscope. The results show that austenite grain diameter of the Q235 steel ring blank increases with the increasing heating temperature and holding time. The signiticant effect of heating temperature on austenitic grain growth is observed compared with that of holding time. Coarsening temperature for the austenite grains is 1100℃. Based on the experimental data, a mathematical model of austenite grain growth for Q235 steel ring blank was proposed. A good agreement between the predicted and experimental results in isothermal condition is verified. ©, 2015, Editorial Office of Transactions of Materials and Heat Treatment. All right reserved.


Zheng Y.,Taiyuan University of Science and Technology | Song J.-L.,Taiyuan University of Science and Technology | Du S.-W.,Shanxi Key Laboratory of Metallic Materials Forming Theory and Technology | Lv Z.-H.,Shanxi Key Laboratory of Metallic Materials Forming Theory and Technology
Suxing Gongcheng Xuebao/Journal of Plasticity Engineering | Year: 2015

Based on the thermodynamic mechanism, curvature-driven mechanism and energy dissipation mechanisms of the grain growth, the cellular transformation rules are proposed. The transformation rules can reflect the physical mechanism of grain growth. The CA model to simulate the normal growth of LZ50 steel is established. High temperature austenite normal grain growth process is simulated by the established model. Typical characteristics during normal grain growth are analyzed from the morphology, dynamics and topology of the CA simulation results. The simulation results accord with the normal grain growth rules accurately. CA method is an effective method for simulation grain growth. © 2016, Editorial Board of Journal of Plasticity Engineering. All right reserved.


Yan H.-H.,Taiyuan University of Science and Technology | Yan H.-H.,Shanxi Key Laboratory of Metallic Materials Forming Theory and Technology | Li Y.-T.,Taiyuan University of Science and Technology | Li Y.-T.,Shanxi Key Laboratory of Metallic Materials Forming Theory and Technology | And 4 more authors.
Suxing Gongcheng Xuebao/Journal of Plasticity Engineering | Year: 2015

A cast ring blank can be directly rolled into ring part by cast-rolling forming technology, which possesses many advantages such as saving energy, saving materials and shortening the process. In this new technology, smelting and casting process have important influence on the quality, microstructure and mechanical properties of casting blank. In this paper, the smelting and casting process were designed for Q235B carbon steel, which is often used to fabricate flange ring. The sand casting process was simulated by use of ProCAST finite element analysis software, and the microstructure at different regions and the position of shrinkage cavity in casting blank was predicted. Then, the commercial test was carried out by use of sand casting method, and the microstructure and mechanical properties of cast blank were investigated. The results show that the numerical simulation results are accordant with the experimental results. The ring casting blank obtained by sand casting has better mechanical properties, which provides an effective guarantee for the successful implementation of the subsequent rolling process. ©, 2015, Beijing Res. Inst. of Mechanical and Elec. Technology. All right reserved.

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