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Effect of cold working and sandblasting on the microhardness, tensile strength and corrosion resistance of AISI 316L stainless steelSuyitno,Budi Arifvianto,Teguh Dwi Widodo,Muslim Mahardika,Punto..., Yogyakarta 55281, Indonesia摘 要:The aim of this work is to investigate the effect of cold working and sandblasting on the microhardness, tensile strength......
Trans. Nonferrous Met. Soc. China 22(2012) s745-s752 Comparison of electrochemical properties of atmospheric pressure plasma coatings for Al2O3-3TiO2 and CoNiCrAlY in sea water Seong-jong KIM1, Seong... electrochemical experiments on the Al2O3-3TiO2 and CoNiCrAlY coating layers by atmospheric pressure plasma spray coating process. By evaluating the corrosion resistance of these materials......
J. Cent. South Univ. (2016) 23: 1556-1563 DOI: 10.1007/s11771-016-3208-8 Processing maps and hot working mechanisms of supercritical martensitic stainless steel WANG Meng-han(王梦寒), WANG Rui(王瑞... Abstract: The hot working mechanism of 2Cr11Mo1VNbN steel was investigated by means of compression tests at temperatures of 900-1150 °C and strain rates of 0.005-5 s-1. At strains of 0.2, 0.3, 0.5 and 0.7......
on the improvement of compression strength of pellets by comparing HPRG pretreatment with ball mill grinding. 2 Experiment and method 2.1 Working principles of high pressure roll grinding The HPRG...J. Cent. South Univ. (2012) 19: 2611-2619 DOI: 10.1007/s11771-012-1318-5 Mechanism of high pressure roll grinding on compression strength of oxidized hematite pellets FAN Jian-jun(范建军)1,2......
length to the tunnel diameter is 1.5. This study improves the evaluation of the upper limit support pressure for the blow-out failure and the relevant theoretical foundation is cemented. Key words: shallow tunnel; working face; blow-out failure; upper bound analysis; support pressure 随着城市规模扩大,为了满足大流量跨区域快速交通要求,隧道成为发展的主流方向,与此同时,城市轨道交通建设也从原来单线隧道逐渐向一次成型的双线方向发展.目前,上海,南京,杭州,武汉和广州等地均采用泥水盾构来进行隧道建设.在隧道掘进过程中,常因覆......
interfaces exist among particles and pores remain in the matrix, which indicates that the sintering process is still not complete under 0.5 MPa. Under this pressure, since the shearing stress working... Effects of sintering pressure and temperature on microstructure and tribological characteristic of Cu-based aircraft brake material XIONG Xiang(熊 翔), SHENG Hong-chao(盛洪超), CHEN Jie(陈 洁......
during the excavation of long-distance single ended tunnel, the full-scale physical model of working face was established by using FLUENT software, and the numerical simulation analysis of tunnel... is distributed in the range of 10 m from the face; after the introduction of the long pressure and short suction ventilation scheme, when the ratio of compressed air volume to exhaust air volume is 0.72......
vapor first flows into the evaporator to transfer heat to the working fluid to generate high-pressure vapor (Figs. 1 and 2, state 1), and it is released into the atmosphere. The working fluid absorbs... that of other working fluids, and the VFR of the isobutene is lower than that of the rest working fluids. It also can be known that the system condensing pressure can be regarded as a constant due......
泵功的增幅,导致热效率逐渐升高.然而,当一级透平入口压力增大到某一值时,CO2-R1270和CO2-R161的泵功增幅超过透平做功的增幅,从而导致热效率下降. 图4 7种混合工质热效率随一级透平入口压力的变化 Fig.4 Change of seven mixed working fluids’ thermal efficiency with rising inlet pressure...主要取决于这3种工质的临界压力变化幅度,临界压力变化幅度越大,热效率提升越高. 图5 7种混合工质的再热入口压力p5与热效率的变化 Fig. 5 Change of seven mixed working fluids’ thermal efficiency with rising reheat pressure 2.3 不同循环系统性能的比较 表3所示为纯CO2工质下回热再热循环/回热循环最大......
Processing map and hot working mechanisms of Cu-Ag alloy in hot compression processWANG Meng-han(王梦寒), HUANG Long(黄龙), CHEN Ming-liang(陈明亮), WANG Yan-li(王彦丽) (School of Materials Science... parameters for bulk metal working are identified clearly by the processing maps.Key words:Cu-Ag alloy; strain-rate sensitivity; hot working mechanism; processing map......
