Employing Simulated Annealing Algorithm (SAA) and many measured data, acalculation model of work roll wear was built in the 2 800 mm 4-high mill of Wuhan Iron and Steel(Group) Co. (WISCO). The model was a semi-theory ...Employing Simulated Annealing Algorithm (SAA) and many measured data, acalculation model of work roll wear was built in the 2 800 mm 4-high mill of Wuhan Iron and Steel(Group) Co. (WISCO). The model was a semi-theory practical formula. Its pattern and magnitude werestill hardly defined with classical optimization methods. But the problem could be resolved by SAA.It was pretty high precision to predict the values for the wear profiles of work roll in a rollingunit. After one-year application, the results show that the model is feasible in engineering, and itcan be applied to predict the wear profiles of work roll in other mills.展开更多
The FEM model of TiBN and TiBN/TiN coated cutting tool in milling of H13 steel w as developed. Process variables such as temperature and stress in the coating l ayer as well as in the substrate were analyzed. The eff...The FEM model of TiBN and TiBN/TiN coated cutting tool in milling of H13 steel w as developed. Process variables such as temperature and stress in the coating l ayer as well as in the substrate were analyzed. The efficacy of the present FEM analysis was verified by conducting controlled milling experiments on AISI H13 t o collect the relevant tool life and force data.The results show that the stress in a coated tool can significantly be reduced compared to an uncoated cutting t ool,possibly due to surface coatings improving the tribological properties of cu tting tools.Coatings with good thermal properties also help to improve the therm al behavior of cutting tool.展开更多
The COREX(coal reduction process),EOF(energy optimizing furnace)andRCC-DR(rotary continuous casting-directreduction)process have been operatingcommercially in south Africa,Brazil andAustria respectively.The linkage of...The COREX(coal reduction process),EOF(energy optimizing furnace)andRCC-DR(rotary continuous casting-directreduction)process have been operatingcommercially in south Africa,Brazil andAustria respectively.The linkage of theseprocesses,the COREX-EOF-RCC-DRprocess,will be suited to small and medium-sized local steel plants in China,whereless scrap is available,electrical poweris expensive and resources of natural gasare scarce.展开更多
基金[This work was financially supported by the National Natural Science Foundation of China (No.59835170).]
文摘Employing Simulated Annealing Algorithm (SAA) and many measured data, acalculation model of work roll wear was built in the 2 800 mm 4-high mill of Wuhan Iron and Steel(Group) Co. (WISCO). The model was a semi-theory practical formula. Its pattern and magnitude werestill hardly defined with classical optimization methods. But the problem could be resolved by SAA.It was pretty high precision to predict the values for the wear profiles of work roll in a rollingunit. After one-year application, the results show that the model is feasible in engineering, and itcan be applied to predict the wear profiles of work roll in other mills.
基金Funded by the National Natural Science Foundation of China (No.50465003) the Natural Science Foundation of Jiangxi Province (No.0350005) the State Key Laboratory Foundation of Die Technology at Huazhong University of Science and Technology (No.04 8)
文摘The FEM model of TiBN and TiBN/TiN coated cutting tool in milling of H13 steel w as developed. Process variables such as temperature and stress in the coating l ayer as well as in the substrate were analyzed. The efficacy of the present FEM analysis was verified by conducting controlled milling experiments on AISI H13 t o collect the relevant tool life and force data.The results show that the stress in a coated tool can significantly be reduced compared to an uncoated cutting t ool,possibly due to surface coatings improving the tribological properties of cu tting tools.Coatings with good thermal properties also help to improve the therm al behavior of cutting tool.
文摘The COREX(coal reduction process),EOF(energy optimizing furnace)andRCC-DR(rotary continuous casting-directreduction)process have been operatingcommercially in south Africa,Brazil andAustria respectively.The linkage of theseprocesses,the COREX-EOF-RCC-DRprocess,will be suited to small and medium-sized local steel plants in China,whereless scrap is available,electrical poweris expensive and resources of natural gasare scarce.
