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defects including wrinkling, cracking, pitting and folding appear if the internal pressure and the axial feeding and transversal stroke are not appropriate. The shear hydro-bent tube is performed..., in which the tube can be successfully formed without defects. Key words: aluminum alloys; hydroforming; shear hydro-bending; rectangular tube 1 Introduction In recent years, hydroforming has been......
Trans. Nonferrous Met. Soc. China 27(2017) 608-615 Sequential multi-objective optimization of thin-walled aluminum alloy tube bending under various uncertainties Heng LI1, Jie XU1, Heng YANG1, He...) method, a sequential multi- objective optimization of larger diameter thin-walled (LDTW) Al-alloy tube bending under uncertainties was proposed and implemented based on the deterministic design......
出现少量孪晶. 图3 TP2铜管轧制态金相组织 Fig. 3 Metallographic of copper tube after rolling 2.2 拉拔变形铜管组织结构的演变 图4所示为不同拉拔道次后铜管金相组织.由图4可见,沿拉拔方向晶粒形貌尺寸发生显著变化,随着变形量的增加,晶界趋于平行拉拔方向并形成纤维流线且晶界宽度增加,晶粒破损严重;周向晶粒...并发生转动,择优取向明显,织构逐渐加强;由图6(b)可见,{101}晶面逐渐趋向于平行观察面,成为主要取向. 图4 不同拉拔道次铜管金相组织 Fig. 4 Metallographs of copper tube after drawing passes 图5 不同状态铜管样品取向成像图 Fig. 5 IPF images of copper......
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of pitting corrosion in condenser tube[J]. ASTM Special Technical Publication, 1997(3): 109-121. [2] 邓楚平, 黄伯云, 李 卫, 潘志勇, 李宏英. 不同服役条件下冷凝器白铜管的腐蚀特性[J]. 中国有色金属学报, 2005, 15(11): 1692-1698.DENG Chu-ping, HUANG...键词:白铜合金;管坯;连铸;旋转电磁场 中图分类号:TG 249.7 文献标识码:A Thin-walled tube billets of cupronickel alloy by electromagnetic continuous casting LI Xin-tao1, 2, GUO Zhao-xiang1, ZHAO......
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Tunnel, 1996, 6: 9-16. [3] 薛勇. 沉管隧道接头研究[J]. 特种结构, 2003, 20(3): 4-8. XUE Yong. Study of immersed tube tunnel joint[J]. Special Structures, 2003, 20(3): 4-8. [4] 刘建航, 侯学渊. 盾构法隧道[M]. 北京: 中国铁道出版社, 1991...; 文献标志码:A 文章编号:1672-7207(2014)06-1983-09 Calculation method of immersed tube tunnel considering mechanical characteristics......
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shaped tube by solid granule medium DU Bing1, ZHAO Chang-cai1, LI Xue-feng2, HE Xin1, DONG Guo-jiang3 (1. Key Laboratory of Advanced Forging & Stamping Technology and Science, Ministry of Education...) Abstract: To meet the challenge of forming high temperature alloy (GH3044) parts, solid granules medium forming (SGMF) process was adopted for forming a convex ring shaped tube that was used......