多材质混合砂型性能及其对A356铝合金凝固组织的影响研究

doi:10.11896/cldb.21080212

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Abstract Multi-material mixed casting can improve the performance of sand casting, improve the thermal and physical parameters, reduce the casting cost, and meet the demand of high performance casting of high-end complex castings. Therefore, the study on the performance of multi-material sand casting and the change law of the microstructure of castings were carried out systematically. By mixing the silica sand, zircon sand and chromite sand particles in different proportions respectively, getting the change rules of the performance of multi-material sand mold in various proportions, choosing the sand formulation which is suitable for complex castings with both casting properties, thermal properties and price. At the same time, in this work, the influence law of mixed sand mold on the secondary dendrite arm spacing of A356 aluminum alloy casting was stu-died. The results show that the secondary dendrite arm spacing (SDAS) of the multi-material sand mold mixed with 50% silica sand and 50% zircon sand was reduced by 23.64% compared with the pure silica sand mold castings, and the secondary dendrite arm spacing of the multi-material sand mold mixed with 50% silica sand and 50% chromite sand was reduced by 13.16% compared with the silica sand mold castings. Therefore, by mixing a certain proportion of zircon sand and chromite sand particles can effectively improve the casting properties of sand mold and the microstructure of castings, and can achieve high quality manufacturing of high-end complex castings.

Key words： multi-material sand sand formulation casting property microstructure

Published: 10 January 2023 Online: 2023-01-31

CLC number:

TG242.7

Fund:National Science Found for Distinguished Young Scholars (51525503), National Key R & D Program of China(2021YFB3401200), and Open Fund for State Key Laboratory of Advanced Forming Technology and Equipment (SKL2020008).

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	YAN Dandan
	SHAN Zhongde
	ZANG Yong

Cite this article:

YAN Dandan,SHAN Zhongde,ZANG Yong. Study on Properties of Multi-material Mixed Sand Mold and Its Effect on Solidification Microstructure of A356 Aluminum Alloy[J]. Materials Reports, 2023, 37(1): 21080212-5.

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http://www.mater-rep.com/EN/10.11896/cldb.21080212 OR http://www.mater-rep.com/EN/Y2023/V37/I1/21080212

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