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roll force model to hot strip mill was analyzed, and the influence of friction coefficient on the normal pressure distribution and roll force during hot rolling was shown. The soft measurement of friction coefficient during hot rolling process was carried out by Brent method, and evolution rule of friction coefficient in a rolling recycle was pointed out, which provides references......
was used to validate the correctness of the model. Then, the friction coefficient function was fitted with the test data to get the friction coefficient model suitable for this paper. Finally, based on the evaluating index of the friction torque and the friction power, two groups of design parameters (oil pressure and friction coefficient) were simulated and explained the changing regulation......
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, advancing side and retreating side are analyzed interdependently, as shown in Fig.4, and different flow pattern at different locations can be obtained. Since the friction coefficient of the softer...-ferrous Metal Materials,Lanzhou University of Technology, Lanzhou 730050, China Received 28 July 2006; accepted 15 September 2006 Abstract: During the friction stir welding (FSW), the property......
are reported by analyzing friction coefficient, wear depth, wear surface and sub-surface micrography, debris components and the wear behavior of Cr12 steel. 2 Experimental SiC foam ceramic was selected... and discussion 3.1 Friction coefficient Fig.3 shows that the mean friction coefficient (COF) of Composite A reduces from 1.00 to 0.85 with the load increasing. As for Composite B, the evolution of mean COF......
of the friction surface and the phase of worn piece in order to reveal the wear mechanism of rare-earth/MoSi2 composite. Results show that the relationships of friction coefficient, μ, or wear rate, W, of MoSi2...Dry Friction and Wear Characteristics of Rare-Earth/MoSi2 Composite 龙春光1,张厚安1,陈平1,刘心宇3 (1.Institute of Material Surface Engineering, Xiangtan Polytechnic University, Xiangtan 411201, China;2.School......
force; fs stands for the maximum static friction force; fv is the viscous friction coefficient; is the piston (ball nut) velocity; and vs is the Stribeck speed. The Tustin friction curve is shown...J. Cent. South Univ. (2017) 24: 1909-1921 DOI: https://doi.org/10.1007/s11771-017-3598-2 Pressure-tracking control of a novel electro-hydraulic braking system considering friction compensation YONG......
weight increases, by comparison, the biggest friction coefficient of Cu-Cr alloy was obtained at load 100 N and rotate speed at 100 r·min-1 friction condition. Moreover, the dominant wear forms...Friction and Wear Property of Cu-Cr Alloy刘建华,王玉辉,高红,张瑞军摘 要:The friction and wear behaviors of the Cu-Cr alloy sliding against GCr15 steel at different......
感应烧结制备高温自润滑涂层及其性能研究肖玲1,丁春华1,孙岩桦2,虞烈2(1.陕西省西安市西安交通大学 航天学院强度与振动教育部重点实验室2.西安交通大学 机械学院)摘 要:通过高能球磨和感应烧结制备耐高温自润滑IS304涂层,涂层中自润滑相明显细化,其中Ag尺寸为5μm左右,BaF2/CaF2尺寸为1μm左右.研究表明,环境温度和组织对涂层的摩擦性能有较大影响,当温度为20-340℃时,2种涂层的摩擦系数都较高,磨损机理主要为微观脆性断裂;随着温度升高,由于磨损面上形成由氟化物和Ag组成的自润滑膜,涂层的摩擦......
℃, the initial friction coefficient of the composite sprays mixed with solid graphite and MoS2 powders by a certain proportion is less than 0.2, exhibiting a synergistic effect. Key words: magnesium alloy; hot incremental forming; solid lubricant; friction coefficient 镁合金是具有良好前景的轻型结构材料,广泛应用于航空,电子和汽车等工业领域.AZ31镁合金板料塑性成形在加热条件下完成,如热拉深成形[1],超塑性成形[2],气胀成形[3]和数控渐进成形.最近几年,板料热渐进成形是国内外研究的焦点之一,其中包括AZ31镁合金板料温/热渐进成形及其......