共搜索到6988条信息,每页显示10条信息,共699页。用时:0小时0分1秒156毫秒
J. Cent. South Univ. (2018) 25: 936-948 DOI: https://doi.org/10.1007/s11771-018-3795-7 Method for secondary spring load equalization of railway vehicles with two-stage spring suspension: Modeling..., the secondary spring loads of railway vehicles must be well equalized. Due to the coupling interactive effects of these hyper static suspended structures, the equalization adjustment through shimming procedure......
, Trondheim, Norway; 3. Hydro Aluminium Research and Technology Development, NO-6600, Sunndals?ra, Norway Received 10 November 2011; accepted 20 June 2012 Abstract: Al-x%Sc-0.11%Zr alloys (x=0, 0.02... that the recrystallization temperature varies from 250 ℃ for the alloy without Sc to about 600 ℃ for the alloy containing 0.15% Sc because of the high density of Al3(Sc,Zr) precipitates. Key words: aluminium alloy......
Structure and tensile/wear properties of microarc oxidation ceramic coatings on aluminium alloy WEI Tong-bo(魏同波), YAN Feng-yuan(阎逢元), LIU Wei-min(刘维民), TIAN Jun(田 军) (State Key Laboratory... oxidation; ceramic coatings; aluminium alloys CLC number: TG174.453 Document code: A 1 INTRODUCTION Aluminium and its alloys have found wide application in engineering, owing to their good specific......
......
Effect of united refining and modification on mechanical properties of A356 aluminium alloys ZUO Xiu-rong(左秀荣), ZHONG Zhi-guo(仲志国) Key Laboratory of Material Physics, Ministry of Education..., B, RE and Sr additions obtain the best mechanical properties in T6 treatment. Key words: A356 aluminium alloys; grain-refining aluminium alloys (GRAI); modification; refining; mechanical properties......
Effect of homogenization treatment on microstructure and hot workability of high strength 7B04 aluminium alloy WANG Tao(王 涛)1, 2, YIN Zhi-min(尹志民)1, SUN Qiang(孙 强)2 1. School of Materials Science... treatment on microstructure, overburnt temperature and hot rolling plasticity of high strength 7B04 aluminium alloy were investigated. Under the condition of homogenization at 470 ℃, the starting melting......
cracks initiated during operation induce the lubrication oil leak and serious safety hazard. Microstructural heterogeneity, including shrinkage/gaspores and secondary phase particles, is the most... and heat treatment. The coalescence of microcracks initiated from the fractured secondary phases was clearly found and can accelerate the initiation and propagation of the fatigue cracks. A link......
......
Conception of tooling adapted to thixoforging of high solid fraction hot-crack-sensitive aluminium alloys G. VANEETVELD1, A. RASSILI1, J. C. PIERRET1, J. LECOMTE-BECKERS2 1. Thixo Unit, B56... aluminium alloys at high solid fraction by modifying process parameters like forming speed, tool temperature and tool thermal protector. Thus an optimum in terms of thermal exchanges has to be found......
utilization. Key words: gibbsite; secondary nucleation; carbonization; chromate leaching solution 1 Introduction Chromium-containing compounds have attracted considerable interest owing... due to attrition from the parent crystals owing to mechanical contact and fluid shearing. The findings indicate that 0.2-1 μm crystals were produced as a result of secondary nucleation during......