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analysis; tube piercing process; [全文内容正在添加中] ......
Al管表面有机杂化膜的制备及性能表征梁永煌1,2,满瑞林1(1.湖南省长沙市中南大学化学化工学院2.湖南省长沙市中南大学有色金属资源化学教育部重点实验室)摘 要:通过化学浸渍在Al管表面钝化生成一层致密疏水的有机杂化膜.疏酸铜点滴实验,析氢实验和铜盐加速乙酸盐雾试验都表明,杂化膜显著提高了Al管的耐腐蚀性能,耐蚀效果超过了铬酸盐钝化膜.电化学Tafel极化曲线和交流阻抗谱(EIS)测定表明,杂化膜使Al的自腐蚀电位正移,阻抗值增大,自腐蚀电流密度降低,有效降低了Al的腐蚀速率.附着力及弯折性能实验结果表明,杂化......
中国超超临界火电机组用S30432钢管研制刘正东1,程世长1,杨钢1,干勇1,徐松乾2,谭舒平3(1.北京市钢铁研究总院2.宝钢股份公司,上海 2009403.哈尔滨锅炉厂有限责任公司,黑龙江哈尔滨 150046)摘 要:回顾和总结了过去10年中国研究,试制和批量生产超(超)临界火电机组用S30432锅炉钢管的历程,重点介绍了中国在S30432钢管最佳化学成分配比和最佳热处理制度确定上的主要技术突破,介绍了S30432钢管工业试制进展和该钢管在中国的应用前景.技术进步的结果表明:中国已掌握了S30432钢管的生......
steel parts. Key words: hot stamping; ultra-high strength steel; die quenching; tailored die quenching; spline forming; tube forming; one shot forming 1 Introduction An effective approach... [16]. Although the hot tube forming using air is similar to the hydroforming, the limitation of the heating temperature is removed. V-shaped hollow axle beams used for suspensions of automobiles......
words: electromotive force method; solid reaction; formation free energy; β(β″)-Al2O3; solid electrolyte tube 铅,锌是重要的有色金属,我国是世界第一的铅锌生产和消费大国[1].然而,由于多年开采,矿石品位不断下降.现有铅的冶炼几乎都是火法冶炼,湿法炼铅还处于试验阶段.火法炼铅过程中,伴生的铜分散......
suitable for hydroforming of the AZ61A magnesium alloy tube with various cross sections. Pre-forming and hydroforming with high strain values are feasible at elevated temperature. Grain refinement... severe local thinning. Key words: tube; hydroforming; magnesium alloy; cross section ......
; 文献标志码:A Effect of annealing temperature on microstructure and properties of Ti80 alloy extrusion tube WANG Qiao-li, DAI Chun, CHENG Xiao-li (Baoji Titanium Industry Co., Ltd., Baoji 721014, China) Abstract: The effect of annealing process on microstructure and properties of Ti80 alloy extruded tube at 800-1 020 ℃ was studied. The results show that the Rm of Ti80 tube......
, the diffusion of oxygen speeds up and the action of filming on HAl77-2 tube accelerates, resulting in decrease of corrosion rate. EN analysis shows that the flow rate of the seawater has little effect on pitting susceptivity of HSn70-1 tube; however the pitting susceptivity of HAl77-2 tube increases with increasing flow rate. Good agreement is observed between the spectral noise resistance Rsn(f......
; 文献标志码:A 文章编号:1672-7207(2011)10-3020-06 Optimization based on extrusion for seamless tube of super hardness aluminum... in the extrusion formation to seamless tube of aluminum alloy, the aluminum alloy 7075 was taken as example, and through numerical simulation of finite element method(FEM), technology parameters which impact......
. Then, a manufacturing method of integral serrated high-finned tube, plowing-extruding based on variational feed was proposed, in which plowing-extruding tool moved forward at two different feeds, f1 and f2, in turn... heat transfer tube; integral serrated high fins; plowing-extruding ......
