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Investigation of structural, morphological and electrochemical properties of mesoporous La2CuCoO6 rods fabricated by facile hydrothermal routeAshok Kumar1,2摘 要:rods were composed of nanocrystallite aggregates. The estimated specific surface area of these mesoporous rods with an average pore......
Effect of Heat Treatment on Microstructures and Properties of Near-Isothermally Forged TiAl Alloy Containing Minor Ni ZHOU Li1,ZHANG Jian-wei2,CHEN Sun-yuan1,LIU Chang-sheng1,YUAN Zhi-shan1,ZHANG Ji2 (1.School of Materials & Metallurgy, Northeastern University, Shenyang, China;2.Central Iron and Steel Research Institute, Beijing, China) 摘要:The heat treatment, including two steps, was proposed......
系可视为活动铰支座,可得到活塞杆受力简化模型如图4所示.图4中,FA,FB,FC和FD分别为上下活塞与缸筒及导向套之间的径向力；s为活塞杆端面至导向套外端面的距离,在活塞杆缩回时,s逐渐增大；l为液压缸活塞端面至连接块的距离；M为由于偏载产生的弯矩. 图4 活塞杆受力简化模型 Fig. 4 Simplified mechanics model of piston rods 该结构为三次超静定结构... of hydraulic cylinder 图13 活塞杆动作同步实验 Fig. 13 Synchronization experiment of piston rods 上述实验结果表明:在取下活塞杆重新安装之前,上活塞杆受到的最大静摩擦力更大,且上下活塞杆的最大静摩擦力相差较大,因此,当阀信号电流较小时,下活塞杆先运动；当阀信号电流增大到一定值时,才能使上下活塞杆同时运动；重新装配后,上下活塞杆受到的最大静摩擦......
temperature is decreased, the largest value of the residual tensile stress in the dangerous region can be reduced. Key words:green remanufacture; hot forged die; medium-high carbon steel; hardfacing......
steel bars and rods using MARC/AutoForge3.1 software. The simulated results visualize the metal flow and the dynamic evolutions of the strain, stress and temperature during the continuous hot rolling......
Typical Microstructural Characteristics of Ti–5Al–5Mo–5V–3Cr–1Fe Metastable β Ti Alloy Forged in α + β RegionZhiying Zheng1,Linjiang Chai1,Kang Xiang1,Weijiu Huang21. College of Materials Science..., typical microstructural characteristics of a metastable β Ti alloy(Ti–5Al–5Mo–5V–3Cr–1Fe) forged in a dual-phase region(strain of 54% at 820 °C) were investigated in detail by the combined use of X......
University of Technology), Ministry of Education摘 要:Dissimilar metal joining of Ti–6Al–4V(TC4) titanium alloy to as-rolled 40 Cr steel rods was conducted......
半高速钢冷轧辊材料的锻后淬火工艺吴琼1,孙大乐1(1.上海市宝山钢铁股份有限公司研究院)摘 要:研究了半高速钢冷轧辊材料的锻热淬火工艺,并与传统热处理工艺获得的力学性能和微观组织进行比较评价,得到如下结论:半高速钢冷轧辊材料锻热淬火(终锻温度大于等于900℃,油冷)+750℃回火后的碳化物尺寸适中,分布均匀弥散,细小的碳化物在最终热处理时容易固溶,对最终热处理组织较为有利;新工艺轧辊的强度,塑性和冲击韧性介于球化退火和调质热处理之间,有着比较均衡的强韧性,而且硬度适中,易于机械加工.因此,新的锻热淬火工艺可以代......
Microstructure and tensile properties of isothermally forged Ni–43Ti–4Al–2Nb–2Hf alloyXiao-Yun Song1,Yan Li2,Fei Zhang21. State Key Laboratory of Nonferrous Metals & Processes, General Research... tests.Results show that the microstructure of as-forged Ni–43Ti–4Al–2Nb–2Hf alloy consists of NiTi matrix,Ti2Ni phase,and Hf-rich phase.The simultaneous addition of Nb and Hf,which have strong affinities......
Nanoscale deformation of multiaxially forged ultrafine-grained Mg-2Zn-2Gd alloy with high strength-high ductility combination and comparison with the coarse-grained counterpartK.Li,V.S.Y.Injeti,P.Trivedi,L.E.Murr,R.D.K.MisraDepartment of Metallurgical, Materials and Biomedical Engineering, University of Texas at El Paso摘 要:Cold processing of magnesium......
