共搜索到7724条信息，每页显示10条信息，共773页。用时：0小时0分0秒516毫秒
coefficient. The solid BN powder does not play the role of lubrication. As a result it can not be employed alone as a solid lubricant in hot incremental forming. When the temperature is lower than 500... and lubrication performances of magnesium alloy sheet in numerically controlled hot incremental forming FENG Tian-tian1, ZHANG Qing-lai1, XIAO Fu-gui1, HAN Yin-ben2, GAO Lin3, HAN Wei-dong4 (1. School......
, lubrication, temperature and normal pressure. The results show that the significant factors affecting the CoF are lubrication, surface roughness, tool material, sliding velocity, normal pressure.... Key words: CP-3 titanium sheet; warm forming; lubrication; coefficient of friction 1 Introduction Titanium and its alloys have been extensively used in aerospace, electronics, energy and biomedical......
Superplastic forming of Ti6Al4V alloy using ZrO2-TiO2 ceramic die with adjustable linear thermal expansion coefficient JIANG Shao-song(蒋少松), ZHANG Kai-feng(张凯峰) National Key Laboratory...; Abstract: Firstly, the relation between the coefficient of thermal expansion(CTE......
Regularized determination of interfacial heat transfer coefficient during ZL102 solidification process SUI Da-shan(隋大山), CUI Zhen-shan(崔振山) National Die and Mould CAD Engineering Research Center...; Abstract: The interfacial heat transfer coefficient(IHTC) between the casting and the mould is essential......
The Influence of Carburizing Parameters on Carbon Transfer Coefficient Tadeusz Sobusiak1 (1.Institute of Precision Mechanics, Warsaw, Poland) 摘要:Definition of coefficient of carbon transfer..., and actual surface carbon content".In this paper, a model is presented of carbon transfer from endothermic atmospheres to carbon steel. The carbon transfer coefficient values were determined......
......
, there is a disagreement between different researchers. SARTORI et al [18] studied the effect of cooling-lubrication on the machining efficiency of difficult-to-cut alloy in terms of tool nose wear... on turning AISI 9310 alloy steel. They stated that lower tool-chip interface temperature and chip reduction coefficient, as well as the average and auxiliary flank wear for MQL machining compared......
strength and wear resistant aluminum bronze, with its friction coefficient and wear-rate lower than those of ZQAl9-4 and ZQAl10-4-4 alloys in terms of Chinese national standard.The results showed that different tribological behaviors were attributed material itself. Under boundary lubrication condition, major wear mechanisms of aluminum bronze are adhesive wear and attrition wear. Its wearability......
J. Cent. South Univ. (2018) 25: 2040-2048 DOI: https://doi.org/10.1007/s11771-018-3893-6 Study of road tunnel threshold zone lighting reduction coefficient DU Feng(杜峰)1, 2, WENG Ji(翁季)1, HU Ying... in threshold zones mostly adopt the reduction coefficient method. However, the determination of reduction coefficient k simply considers tunnel design speed and flow rate, while excluding outside tunnel......
......
