Modeling and optimization of cooling slope process parameters for semi-solid casting of A356 Al alloy

作     者：Hamed KHOSRAVI Reza ESLAMI-FARSANI Mohsen ASKARI-PAYKANI Hamed KHOSRAVI;Reza ESLAMI-FARSANI;Mohsen ASKARI-PAYKANI

作者机构：Department of Materials Engineering Faculty of Mechanical EngineeringK. N. Toosi University of Technology School of Metallurgy and Materials Engineering College of EngineeringUniversity of Tehran 

出 版 物：《Transactions of Nonferrous Metals Society of China》 (中国有色金属学报（英文版）)

年 卷 期：2014年第24卷第4期

页      码：961-968页

摘      要：Semi-solid processing （SSP） of A356 aluminum alloy was discussed via cooling slope （CS） method. The D-optimal design of experiment （DODE） was employed for experimental design and analysis of results. 38 random experiments obtained by software were carried out. In experimental stage, the molten aluminum alloy was poured on an inclined plate with different lengths of 100, 300 and 500 mm set at 30°, 45° and 60° of slope angles respectively. Three different pouring temperatures of 660, 680 and 700 ℃ were also used. After the casting process, the partial re-melting treatment was carried out at 590 ℃ for different isothermal time of 5, 8 or 12 min. The combined effect of these factors on globularity of the primary α（Al） crystals was investigated and optimized using DODE. The results indicated that the primary dendritic phase in the conventionally cast A356 alloy was transformed into a non-dendritic one in ingots cast over a cooling plate. The CS processed samples exhibited a globular structure only after re-heating to semi-solid region. The optimum values of pouring temperature, cooling length, slope angle and isothermal holding time were found to be 660 ℃, 360 mm, 48°, and 9 min, respectively. In this case, the globularity of primary crystals was obtained, about 0.91. The obtained model is highly significant with a correlation coefficient of 0.9860.

主 题 词：vA356 aluminum alloy cooling slope process modeling D-optimal design of experiment 

学科分类：080503[080503] 0806[工学-电气类] 08[工学] 0818[工学-交通运输类] 0815[工学-矿业类] 0805[工学-能源动力学] 0813[工学-化工与制药类] 0703[理学-化学类] 0802[工学-机械学] 0814[工学-地质类] 0702[理学-物理学类] 080201[080201] 

核心收录：

D　O　I：10.1016/S1003-6326(14)63149-6

馆 藏 号：203520071...