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Scratch behavior of high speed steels for hot rollsLi Zhou1,2,3), Dale Sun2), Changsheng Liu3), Chunguang Li3), and Lisong Yao2) 1) Shougang Research Institute of Technology, Beijing 100041, China 2...">The scratch behaviors of two high speed steels (HSS) for hot rolls were studied by a Micro-combi Tester, and the emphasis was placed on researching the relations between the microstructure and the scratch......
Study on the Tribological Properties and Composition of W6Mo5Cr4V2 High Speed Steel Implanted by Boron XIONG Wan-quan1,CAI Zhi-hai1,ZAHO Jun-jun1,ZHANG Ping1,TAN Jun1 (1.National Key Laboratory for Remanufacturing, Beijing 100072, P. R. China) 摘要:Boron atoms were implanted into W6Mo5Cr4V2 high-speed steel (HSS) in CC-60 ion implantation machine to improve its tribological properties......
experimenting platform 图4 PID控制器及改进前后的滑模控制器的速度曲线 Fig. 4 Speed of PID controller and sliding mode controller 对于具有噪声干扰场合的控制系统,本文加入了卡尔曼滤波器,对噪声干扰进行了滤除.设置噪声w为[-1.2,1.2]内的白噪声信号,v为[-0.3,0.3]内的白噪声信号,卡尔曼滤波... 利用SPWM和SVPWM方法时的电流波形 Fig. 7 Current waveforms of controller when using SPWM and SVPWM method 图8 滑模控制时与PID控制时的速度曲线 Fig. 8 Speed curves of sliding mode controller and PID......
; Effect of ultrasonic power and casting speed on solidification structure...-continuous casting were researched, and the effects of casting speed on solidification structure in ultrasonic field were also analyzed. The experiment and simulation results show that the solidification......
J. Cent. South Univ. (2017) 24: 81-89 DOI: 10.1007/s11771-017-3411-2 Modeling flame propagation speed and quenching distance of aluminum dust flame with spatially random distribution of particles... in a random way was studied by a numerical approach. A new thermal model was generated to estimate flame propagation speed in a lean/rich reaction medium. Flame speed for different particle diameters......
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Dry Sliding Tribological Properties of a Dendrite-reinforced Zr-based Bulk Metallic Glass Matrix CompositeHuijun Yang1,2,Yong Liu1,Teng Zhang1,Hengpeng Wang1,Bin Tang1,Junwei Qiao21. Research... with a vacuum arc melter by the copper mold suction casting.Effect of different normal loads and sliding velocities on the tribological properties of MGM composites was studied. The results showed......
Influence of laser scanning speed on Cu-Zr-Al composite coatings on Mg alloysYa-li Gao1,Meng Jie2,Hai-bo Zhang11. School of Mechanical Engineering, Northeast Dianli University2. School of Mechanical...-Al composite coatings on AZ91HP magnesium alloy by laser cladding. The influence of laser scanning speed on the microstructures and properties of the coatings was discussed. The coatings consist......
Effect of casting speed on surface quality of horizontal direct chill casting 7075 aluminum alloy ingotQingfeng ZHU ,Zhihao ZHAO,Jianzhong CUI,Xiangjie WANG and Ke QIN Key Laboratory... been produced by hor-izontal direct chill casting in different casting speed. The effect of the casting speed on the ingot surface and subsurface layer was studied by surface observation......