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Low pressure die casting A356 aluminum alloy wheels on the microstructure and mechanical properties


Conditions, die casting parts should be designed as thin, not only can reduce the quality of die casting, die casting mold, and also to reduce the heat load. But the die-casting wall thickness should not be too thin, must be able to meet the liquid metal flow in the cavity and filling requirements, generally about 3mm for the best. (2) die-casting wall thickness should be as even as possible in order to avoid thermal node, reduce the local heat concentration, reduce mold thermal fatigue [33. Received date :2008 -03-22 First Author: Zhang Hongfeng, male, born in 1967, Associate Professor, Nanyang Institute of Electrical and Mechanical Engineering Department Address: Changjiang Road,[link widoczny dla zalogowanych], Nanyang, Henan 8O number (473004), Tel: 13603776528 , E-mail: zhfzhf333 @ 163. corn crystalline silicon phase morphology, size and distribution, so that the ball of the eutectic silicon, small and uniform distribution, which is casting for good mechanical properties is of great significance. 4 Conclusion (1) low pressure casting wheel A356 Al-based organization takes the shape of a mouth of dendritic, eutectic Si particles were unevenly distributed in the fine grain boundaries. Wheel at different parts of the grain size difference, which with the cooling conditions. Needle and tissue distribution of iron herringbone compounds, and final solidification of the casting at the existence of thick-walled small amount of shrinkage and porosity and other casting defects. (2) low pressure die casting A356 wheels tensile strength, yield strength, elongation were 303MPa, 225MPa, 14.3%, compared with sand casting, investment casting and T6 treatment of high mechanical properties of castings, which with its good closely related to the microstructure. References [1] WANGQG. Microstructuraleffectsonthetensileandfracturebe-haviorofaluminumcastingalloysA356/357 [J]. Metallurgicaland-MaterialsTransactions, 2003, A34 :2887-2899. [2] Wang Dong, Liu Zhiming, Qu Wanchun, et al. Low pressure casting of liquid metal in the filling and influencing [J]. Special Casting & Nonferrous Alloys,[link widoczny dla zalogowanych], 1999 (2) :16-19. [33 Ran wide TRANSACTIONS OF Wangyong Fang, et al. A356 Aluminum Alloy Casting Microstructure and Tensile Properties of [J]. Metal Heat Treatment, 2007 (3) :13-17. [43 Zhang Shilin, Ren Weng like. Simple aluminum guide [M]. Shanghai: Shanghai Science and Technology Literature Press, 2001. [53 high-Chak-sang. A356 alloy a-Al grain refinement [J]. Special Casting & Nonferrous Alloys, 1999 (5) :26-27. [6] THEORETICAL, Liu method, Zhang Zuogui, et al. AITiC Bu si master alloy A refinement of the alloy [J]. Special Casting & Nonferrous Alloys, 2000 (5): 45. [7] Yang Li-li, Zhang Hu, Zeng Songyan. Typical refiner refining effect on the A356 alloy mouth]. Special Casting & Nonferrous Alloys, 2006,[link widoczny dla zalogowanych],26 (6) :375-377. [8] Zhang Ji Yue, WANG Zhi-min, Huang Rong plot. Compound modification on AISi7Mg and properties of alloy [J]. Special Casting & Nonferrous Alloys, I999 (4) :6-8. [9] Zhong Zhiguo, left CORRESPONDENCE Sun Haibin, et al. Refinement and modification methods on the microstructure of A356 aluminum alloy [J]. Foundry Technology, 2006,27 (1) :49-51. [1O] Jun Shen. A356 alloy casting aluminum alloy wheels melt processing [J]. Nonferrous Metals Processing, 2002,3 (2) :27-29. [11] ALLEM. Castingdefectsandfatiguestrengthofadie-castalu-minumalloy: acomparisonbetweenstandardspecimensandPro-ductioncomponents [J]. 1nt. J. Fatigue ,2002,[link widoczny dla zalogowanych],24:1-9. [12] Chen Kuang, Shao-Kang Guan, Hu Baojian, et al. T6 cast aluminum alloy wheels Optimization of heat treatment [J]. Thermal processing technology, 2006,35 (6) :30-32. [13] Wan agriculture,[link widoczny dla zalogowanych], Jian-Xin, Xie Xishan. AISi7Mg Thermodynamic Analysis of Department of aluminum alloy [J]. Special Casting & Nonferrous Alloys, 2005,25 (6) :378-380. (Editor: Yuan Zhenguo) 375

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