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Influence of process parameters on the microstructural evolution of a rear axle tube during cross wedge rolling 被引量:3
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作者 Jia-wei Ma Cui-ping Yang +2 位作者 Zhen-hua Zheng Kang-sheng Zhang Wen-yu Ma 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2016年第11期1302-1314,共13页
In the shaping process of cross wedge rolling(CWR), metal undergoes a complex microstructural evolution, which affects the quality and mechanical properties of the product. Through secondary development of the DEFOR... In the shaping process of cross wedge rolling(CWR), metal undergoes a complex microstructural evolution, which affects the quality and mechanical properties of the product. Through secondary development of the DEFORM-3D software, we developed a rigid plastic finite element model for a CWR-processed rear axle tube, coupled with thermomechanical and microstructural aspects of workpieces. Using the developed model, we investigated the microstructural evolution of the CWR process. Also, the influence of numerous parameters, including the initial temperature of workpieces, the roll speed, the forming angle, and the spreading angle, on the grain size and the grain-size uniformity of the rolled workpieces was analyzed. The numerical simulation was verified through rolling and metallographic experiments. Good agreement was obtained between the calculated and experimental results, which demonstrated the reliability of the model constructed in this work. 展开更多
关键词 microstructural evolution grain size cross wedge rolling finite element method computer simulation tubes
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Finite element analysis of deformation characteristics in cold helical rolling of bearing steel-balls 被引量:2
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作者 曹强 华林 钱东升 《Journal of Central South University》 SCIE EI CAS CSCD 2015年第4期1175-1183,共9页
Due to the complexity of investigating deformation mechanisms in helical rolling(HR) process with traditional analytical method, it is significant to develop a 3D finite element(FE) model of HR process. The key formin... Due to the complexity of investigating deformation mechanisms in helical rolling(HR) process with traditional analytical method, it is significant to develop a 3D finite element(FE) model of HR process. The key forming conditions of cold HR of bearing steel-balls were detailedly described. Then, by taking steel-ball rolling elements of the B7008 C angular contact ball bearing as an example, a completed 3D elastic-plastic FE model of cold HR forming process was established under SIMUFACT software environment. Furthermore, the deformation characteristics in HR process were discovered, including the forming process, evolution and distribution laws of strain, stress and damage based on Lemaitre relative damage model. The results reveal that the central loosening and cavity defects in HR process may have a combined effect of large negative hydrostatic pressure(positive mean stress)caused by multi-dimensional tensile stresses, high level transverse tensile stress, and circular-alternating shear stress in cross section. 展开更多
关键词 cold helical rolling finite element(FE) simulation rotary forming bearing steel-balls
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Head Curvature of Pure Titanium Sheet Influenced by Process Parameters and Controlling in Hot Rolling Process 被引量:1
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作者 于辉 LI Jun +1 位作者 LIU Ligang 肖宏 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2017年第2期444-450,共7页
We investigated the influences of process parameters on the head curvature of pure titanium sheet in hot rolling process and proposed the controlling means. First, the thermal simulation experiments for pure titanium ... We investigated the influences of process parameters on the head curvature of pure titanium sheet in hot rolling process and proposed the controlling means. First, the thermal simulation experiments for pure titanium TA1 were carried out to investigate the hot deformation behaviors of pure titanium in the temperature range of 700-800 ℃ with strain rate range of 1-20 S-1, and the processing map was established to determine optimized deformation parameters. Then, the finite element model has been constructed and used to analyze the effect of process parameters on the direction and severity of head curvature of pure titanium sheet. The process parameters considered in the present study include workpiece temperature, work roll diameter, pass reduction, oxide scale thickness of workpiece surface, and interface friction coefficient. The simulation results show that the workpiece temperature and the interface friction coefficient are the two main factors. The proposed controlling means was carried out on a hot rolling production line and solved the head curvature problem effectively. The rolling practices indicate that the rolling yield is improved greatly. 展开更多
关键词 head curvature hot rolling process parameter thermal simulation pure titanium sheet
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Computer Simulating Calculation on the Microstructure Evolutions during Hot Strip Rolling of C-Mn Steels
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作者 Zhenyu LIU Guodong WANG and Qiaing ZHANG(Northeastern University, Shenyang, 110006, China) 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 1994年第3期221-224,共4页
The program to predict the microstructure evolutions during hot strip rolling of C-M n steels has been developed in this paper, BV using this program, the microstructure changes with the processing parameters were ana... The program to predict the microstructure evolutions during hot strip rolling of C-M n steels has been developed in this paper, BV using this program, the microstructure changes with the processing parameters were analysed in detail. showing not only a good agreement of prediction with the measured values, but also entirely possibility to optimize hot strip rolling precess by computer simulation 展开更多
关键词 MN Computer Simulating Calculation on the Microstructure Evolutions during Hot Strip rolling of C-Mn Steels FIGURE
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