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-walled Y-shaped tube was investigated. With axial feeding, tube material can be pushed into the die cavity to form a higher protrusion height with relatively small thinning ratio. For the Y-shaped tube, however, owing to the high-friction forces acting at internal pressure in the guiding zone between the tube and die, less metal flows into the protrusion. A multistage punch was proposed to change......
Forming characteristics of thin-walled tube bending process with small bending radius LI Heng(李 恒) , YANG He(杨 合), ZHAN Mei(詹 梅), GU Rui-Jie(谷瑞杰) Department of Materials Forming and Control Engineering, Northwestern Polytechnical University,Xi’an 710072, China Received 10 April 2006; accepted 25 April 2006 Abstract: Currently requirements of thin-walled tube with small......
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Effects of Ca addition on tensile properties and microstructures of hot-extruded AZ91 alloy tube WANG Feng(王 峰)1, LIU Zheng(刘 正)1, YU Bao-yi(于宝义)1, ZHANG Kui(张 奎)2 1. School of Materials Science... 2006 Abstract: As-cast AZ91+XCa (X=0, 0.5%, 1.0%, 1.5%, mass fraction) magnesium alloys were extruded into tube at 380℃ with an extrusion ratio of 6:1. The tensile properties and microstructures......
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Experimental investigation of axially loaded steel fiber reinforced high strength concrete-filled steel tube columnsLU Yi-yan(卢亦焱), LI Na(李娜), LI Shan(李杉), LIANG Hong-jun(梁鸿骏) (School of Civil Engineering, Wuhan University, Wuhan 430072, China)Abstract:an experimental study on the compressive behavior of steel fiber reinforced concrete-filled steel tube columns is presented. specimens were tested......
rare earths based on the electrochemical mathematical models An inorganic composite membrane with alloy film of 76.8(mol)% Pd-23.2(mol)% Ag and the thickness of 7.7 μm on the porous ceramic tube...; ceramic tube; composite membrane; rare earths; [全文内容正在添加中] ......
J. Cent. South Univ. Technol. (2011) 18: 1813-1818 DOI: 10.1007/s11771-011-0907-z Characteristics of thickness distribution of tailor-welded tube hydroforming CHU Guan-nan(初冠南)1, 2, LIU Gang(刘钢)3... Berlin Heidelberg 2011 Abstract: Both experimental and mechanical analyses were carried out to investigate the characteristics of thickness distribution for tailor-welded tube (TWT) hydroforming......