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Trans. Nonferrous Met. Soc. China 22(2012) s859-s863 Thermal deformation of aluminum alloy casting materials for tire mold by numerical analysis Hee-Sung YOON1, Je-Se CHOI1, Yool-Kwon OH2 1...; accepted 5 November 2012 Abstract: Thermal deformation of aluminum alloy casting materials for manufacturing the tire mold was numerically investigated. The AC7A and AC4C casting material was selected......
Influence of vacuum heat treatment on structure and micro-hardness of electroless Ni-P-SiC composite coating LONG Shi-guo(龙士国)1, MA Zeng-sheng(马增胜) 1, HU Wen-bin(胡文彬)2, ZHOU Yi-chun(周益春)1 1. Key... coatings were prepared and the influence of vacuum heat treatment on its structure and properties was analyzed. The Ni-P-SiC composite coatings were characterized by morphology, structure and micro......
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弹簧钢连铸坯中心偏析的研究蒋丽红1,田乃媛2(1.北京市北京科技大学冶金工程研究院2.北京科技大学 冶金与生态工程学院,北京 100083)摘 要:为了探讨真空精炼和过热度对弹簧钢连铸坯中心偏析的影响,采用两种生产工艺:转炉→LF→VD→连铸和转炉→LF→连铸,并取不同的过热度(30℃和22℃),生产60Si2 Mn弹簧钢连铸坯.在矩形坯上取样分析碳和硫的偏析情况,并进行对比.其结果是:经过真空精炼,连铸坯的碳偏析指数从1.72降低到1.28;硫偏析指数从2.68降低到1.68.关键词:弹簧钢； ......
Interface microstructure and diffusion of vacuum annealed ceramic coating on superalloy GH202 GU Yi(古 一), XIA Chang-qing(夏长清), QIU Guan-zhou(邱冠周), WANG Zhi-fa(王志法) School of Materials... coating and superalloy GH202 substrate during vacuum diffusion was studied. It is shown that Al2O3 oxide layer and (Ti, N) compound exist in the alloy substrate close to interface. During long time......
Interface structure and mechanical property of aluminum cooler vacuum brazing joint FENG Tao(冯 涛)1, LOU Song-nian(楼松年)1, WU Lu-hai(吴鲁海)1, LI Ya-jiang(李亚江)2 1. School of Materials... 15 September 2006 Abstract: A kind of aluminum cooler was manufactured by means of vacuum brazing technique, and the cooler was examined by hydraulic pressure test. The result indicates......
J. Cent. South Univ. Technol. (2009) 16: 0385-0391 DOI: 10.1007/s11771-009-0065-8 Characteristics of activated carbon prepared from Chinese fir sawdust by zinc chloride activation under vacuum... fir sawdust by zinc chloride activation under both nitrogen atmosphere and vacuum conditions was carried out in a self-manufactured vacuum pyrolysis reactor. The effects of the system pressure......
Effect of Rare Earth on Microstructure of Vacuum Melting Ni-Based Self-Fluxing Alloy Coatings 宣天鹏1,闵丹1 (1.Institute of Material Science and Engineering,Hefei University of Technology,Hefei 230009,China) Abstract:The Ni-based self-fluxing alloy coating containing RE was acquired by the technique of vacuum melting on the hypoeutectoid steel (Fe-0.45%C) matrix. By X-ray diffraction, SEM and EDX......
Simulation of microstructures in solidification of aluminum twin-roll casting based on CA LIU Xiao-bo(刘晓波)1, XU Qing-yan(许庆彦)2, JING Tao(荆 涛)2, LIU Bai-cheng(柳百成)2 1. School...; Abstract: The microstructures in the solidification process of aluminum twin-roll casting was simulated based on CA (Cellular Automation Method), and the nucleation model based......
Effect of temperature on vacuum hot bulge forming of BT20 titanium alloy cylindrical workpiece WANG Ming-wei(王明伟)1, 2, ZHANG Li-wen(张立文)1, 2, PEI Ji-bin(裴继斌)1, 2, LI Chen-hui(李辰辉)3, ZHANG Fan... parameters for BT20 titanium alloy cylindrical workpiece manufactured by vacuum hot bulge forming. A two-dimensional nonlinear thermo-mechanical coupled FE model was established. Numerical simulation......
