共搜索到8843条信息，每页显示10条信息，共885页。用时：0小时0分0秒809毫秒
文章编号:1004-0609(2010)10-1895-06 近液相线半连续铸造过程中A390合金初生硅的形成机理 王 娜,周志敏 (东北大学 理学院,沈阳 110004) 摘 要:采用近液相线半连续铸造技术制备A390合金坯料,对铸锭显微组织进行金相观察,采用图像分析软件Image-Pro Plus计算晶粒尺寸,研究浇注温度从高于液相线(650 ℃)100 ℃至10 ℃范围内变化对A390合金初生硅尺寸形貌的影响.结果表明:近液相线半连续铸造时,较低的浇注温度以及较均匀的温度场有利于均匀形核,同时减小熔体中Si的浓度梯度,从而消除Si原子聚集成团的条件,抑制初生硅的生长；因此,仅控制近液相线半连续铸造的工艺参数即可改善A390合金半固态坯料中初生硅尺寸形貌,这是制备过共晶铝硅合金半固态坯料的简单,可行,高效和低成本的方法. 关键词:A390......
Trans. Nonferrous Met. Soc. China 27(2017) 2529-2538 Characterization of A390 aluminum alloy produced at different slow shot speeds using vacuum assisted high pressure die casting Wen-bo YU1,2, Zi... properties of high pressure die cast A390 alloy at different slow shot speeds were evaluated. Plate-shaped specimens of hypereutectic A390 aluminum alloy were produced on a TOYO BD-350V5 cold chamber die......
Trans. Nonferrous Met. Soc. China 20(2010) s754-s757 Microstructure and mechanical properties of rheo-diecasted A390 alloy ZHAO Jun-wen(赵君文)1, WU Shu-sen (吴树森)2 1. School of Materials... and Technology, Wuhan 430074, China Received 13 May 2010; accepted 25 June 2010 Abstract: The microstructure and mechanical properties of the rheo-diecasting (RDC) A390 alloy under as-cast and T6 heat......
) by the dissolution of aluminum phase from the A356 solid alloy and by subsequent diffusion solidification[4]. Fig.6 Effect of amount of addition of solid alloy on microstructure of A390 slurry: (a) 50 g A390; (b... Semi-solid processing of hypereutectic A390 alloys using novel rheoforming process M. TEBIB1, J. B. MORIN1, F. AJERSCH2, X. GRANT CHEN1 1. Université du Québec à Chicoutimi, Chicoutimi, QC, G7H......
graded components that has been developed in recent years. The functionally graded cylindrical shape component with a radial gradient, e.g. the first alloy (A390) with high wear resistance on the surface... was obtained at 860 °C and 35 s decanting time with a width of 500 μm. Also, the wear resistance test was performed to measure and compare the surface wear resistance to the core. Key words: A390 alloy......
Trans. Nonferrous Met. Soc. China 29(2019) 931-940 Effect of ECAP on microstructure and tensile properties of A390 aluminum alloy Esmaeil DAMAVANDI, Salman NOUROUZI, Sayed Mahmood RABIEE, Roohollah..., mechanical properties, and fracture surface of samples. 2 Experimental The alloy used in the present study was the as-cast A390 aluminum alloy. The chemical composition of A390 alloy is presented in Table 1......
> Abstract: A hypereutectic aluminum-silicon alloy with content of 17%Si, designed as A390, was modified. The change of microstructure was identified by optical microscopy... Transformation of microstructure after modification of A390 alloy ZHANG Ying(张英)1, 2, YI Dan-qing(易丹青)1, LI Wang-xing(李旺兴)2, REN Zhi-sen(任智森)2, ZHAO Qun(赵群)2, ZHANG Jun-hong(张俊红)2 1. School......
时效处理对A390挤压态合金组织及性能的影响李史星,苗艳伟洛阳麦达斯铝业有限公司摘 要:文章主要研究时效处理对A390合金组织,硬度等力学性能的影响,以便最终提高材料的硬度等力学性能.关键词:A390合金;时效处理;显微组织;布氏硬度;力学性能;......
铸造工艺参数对半连续铸造A390合金管坯宏微观组织的影响左克生,张海涛,秦克,崔建忠东北大学材料电磁过程研究教育部重点实验室摘 要:采用半连续铸造方法制备了A390合金管坯.研究了铸造速度和铸造温度对A390合金管坯宏微观组织的影响.结果表明:随着铸造速度由90 mm/min提升至120 mm/min,铸造温度由800℃增加至850℃,管坯中初生Si宏观分布趋于均匀,初生Si颗粒的平均尺寸逐渐减小.截面尺寸为164 mm/60 mm的半连续铸造A390合金管坯的最佳铸造工艺参数为:铸造速度110 mm/min,铸造温度850℃,可以获得初生Si宏观分布均匀,初生Si颗粒平均尺寸不超过26μm的管坯,管坯内侧的抗拉强度为264 MPa,延伸率为0.5%.关键词:A390合金;初生Si......
均匀化处理对A390铝合金微观组织和硬度的影响钟鼓1,2,邱楚2,吴志斌2,李新涛2,长海博文21. 中铝科学技术研究院2. 苏州有色金属研究院有限公司摘 要:通过分析比较共晶硅和析出相的数量,尺寸,形貌变化,研究了均匀化温度,均匀化时间和均匀化后的冷却速率对A390铝合金微观组织演变及布氏硬度的影响规律.结果表明:析出相的析出数量增加是均匀化处理后A390铝合金布氏硬度降低的主要原因,而共晶硅尺寸,形貌的改变对其影响较小.合金中析出相的析出数量主要受均匀化处理后的冷却速率影响,同一均匀化温度和时间下,随均匀化冷却速率的减小,析出相数量增多,布氏硬度迅速降低.均匀化处理后,共晶硅熔断粒化,Al2Cu相发生分解和球化,Al5Cu2Mg8Si6相数量增加.关键词:A390铝合金;均匀化;微观......
