Continuous cooling transformation of under-cooled aus- tenite for Nb-V microalloyed spring steel 60Si2CrVATHua-lin Wu, Fu-ming Wang, Chang-rong Li, Qing Yan, and Bo ZhangAbstract： The continuous cooling transformatio...Continuous cooling transformation of under-cooled aus- tenite for Nb-V microalloyed spring steel 60Si2CrVATHua-lin Wu, Fu-ming Wang, Chang-rong Li, Qing Yan, and Bo ZhangAbstract： The continuous cooling transformation curves of under-cooled austenite in Nb-V microalloyed spring steel 60Si2CrVAT were measured by using a DIL805A quench- ing deformation dilatometer. The microstructure changes of under-cooled austenite in the tested steels at different cool- ing rates were studied by the metallographic method cou- pling with the microhardness method. The effect of Nb con- tent on continuous cooling transformation of the tested steels was analyzed. The experimental results show that with the increase in Nb content, the high-temperature and medium-temperature phase transitions were promoted,展开更多
The low-temperature selective catalytic reduction （SCR） denitrification of a flue gas was carried out with Ce-MnOx/ACFN. The denitrification efficiencies were studied by modifying the activated carbon fibers （ACF）...The low-temperature selective catalytic reduction （SCR） denitrification of a flue gas was carried out with Ce-MnOx/ACFN. The denitrification efficiencies were studied by modifying the activated carbon fibers （ACF） and changing the Ce-MnOx loading capacity, Ce/Mn molar ratio and operating conditions respectively. Ce-MnOx/ACFN as a SCR denitrification catalyst has good activity at 70-110℃. The denitrification efficiency increases with rising temperature, and it improves obviously after the ACF is modified by nitric acid. With the increasing of Ce-MnOx loading capacity and Ce/Mn molar ratio, the denitrification efficiency increases firstly and then decreases; but with the increasing of NH3/NO molar ratio in the inlet flue gas, it increases firstly and then tends to be stable. When the volume fraction of vapor in the inlet flue gas is above 8% the denitrification efficiency decreases with the vapor volume fraction increasing.展开更多
Nonlinear calculation of Hardgrove grindability index for mixed coal used in pulverized coal injectionJian Duan, Long-zhe Jin, Sheng-nan Ou, Zhao-zhong Ding, and Fei GuoAbstract： Both experiments and theory analysis ...Nonlinear calculation of Hardgrove grindability index for mixed coal used in pulverized coal injectionJian Duan, Long-zhe Jin, Sheng-nan Ou, Zhao-zhong Ding, and Fei GuoAbstract： Both experiments and theory analysis proved that the Hardgrove grindability index （HGI） of mixed coal was nonlinear with its mixture ratio, which was explained by the theory of micro-grinding-ball effect. The HGI of 5 mixed coal samples was measured in lab. Because the HGI data of different mixed coal samples change in different ranges, they could not be directly compared with each other. Though normalizing by the relative grindability ratio （RGR）,展开更多
Optimization algorithm based on Lab VIEW parallel operation and its application in Ni-Ti alloy wire dieless drawing Hong-gang Zhang, Yan-bin Jiang, Zhi-hao Zhang, and Jian-xin Xie Abstract： An optimization method bas...Optimization algorithm based on Lab VIEW parallel operation and its application in Ni-Ti alloy wire dieless drawing Hong-gang Zhang, Yan-bin Jiang, Zhi-hao Zhang, and Jian-xin Xie Abstract： An optimization method based on LabVIEW parallel operation was proposed to improve the com- puting speed of the traditional genetic algorithm. When applied in a multi-core computer, the optimiza- tion method can achieve multithreading concurrent operations, thereby improving the efficiency of com- putation obviously. The initial speed-path of Ni-Ti al- loy wire dieless drawing was optimized in an eight-core computer by using the optimization method. Com- pared with a method based on MATLAB program, the operation time of the optimization method is only about 1/8 as long as that of the former. Experimental results show that after adopting the optimized speed-path, the length of diameter fluctuation is about 24 mm, which is far less than that of other speed-paths such as the S-line style or linear path.展开更多
文摘Continuous cooling transformation of under-cooled aus- tenite for Nb-V microalloyed spring steel 60Si2CrVATHua-lin Wu, Fu-ming Wang, Chang-rong Li, Qing Yan, and Bo ZhangAbstract： The continuous cooling transformation curves of under-cooled austenite in Nb-V microalloyed spring steel 60Si2CrVAT were measured by using a DIL805A quench- ing deformation dilatometer. The microstructure changes of under-cooled austenite in the tested steels at different cool- ing rates were studied by the metallographic method cou- pling with the microhardness method. The effect of Nb con- tent on continuous cooling transformation of the tested steels was analyzed. The experimental results show that with the increase in Nb content, the high-temperature and medium-temperature phase transitions were promoted,
文摘The low-temperature selective catalytic reduction （SCR） denitrification of a flue gas was carried out with Ce-MnOx/ACFN. The denitrification efficiencies were studied by modifying the activated carbon fibers （ACF） and changing the Ce-MnOx loading capacity, Ce/Mn molar ratio and operating conditions respectively. Ce-MnOx/ACFN as a SCR denitrification catalyst has good activity at 70-110℃. The denitrification efficiency increases with rising temperature, and it improves obviously after the ACF is modified by nitric acid. With the increasing of Ce-MnOx loading capacity and Ce/Mn molar ratio, the denitrification efficiency increases firstly and then decreases; but with the increasing of NH3/NO molar ratio in the inlet flue gas, it increases firstly and then tends to be stable. When the volume fraction of vapor in the inlet flue gas is above 8% the denitrification efficiency decreases with the vapor volume fraction increasing.
文摘Nonlinear calculation of Hardgrove grindability index for mixed coal used in pulverized coal injectionJian Duan, Long-zhe Jin, Sheng-nan Ou, Zhao-zhong Ding, and Fei GuoAbstract： Both experiments and theory analysis proved that the Hardgrove grindability index （HGI） of mixed coal was nonlinear with its mixture ratio, which was explained by the theory of micro-grinding-ball effect. The HGI of 5 mixed coal samples was measured in lab. Because the HGI data of different mixed coal samples change in different ranges, they could not be directly compared with each other. Though normalizing by the relative grindability ratio （RGR）,
文摘Optimization algorithm based on Lab VIEW parallel operation and its application in Ni-Ti alloy wire dieless drawing Hong-gang Zhang, Yan-bin Jiang, Zhi-hao Zhang, and Jian-xin Xie Abstract： An optimization method based on LabVIEW parallel operation was proposed to improve the com- puting speed of the traditional genetic algorithm. When applied in a multi-core computer, the optimiza- tion method can achieve multithreading concurrent operations, thereby improving the efficiency of com- putation obviously. The initial speed-path of Ni-Ti al- loy wire dieless drawing was optimized in an eight-core computer by using the optimization method. Com- pared with a method based on MATLAB program, the operation time of the optimization method is only about 1/8 as long as that of the former. Experimental results show that after adopting the optimized speed-path, the length of diameter fluctuation is about 24 mm, which is far less than that of other speed-paths such as the S-line style or linear path.
