Study on Properties of Multi-material Mixed Sand Mold and Its Effect on Solidification Microstructure of A356 Aluminum Alloy

被引：0

作者：

Yan D. ^{[1
,2
]}

Shan Z. ^{[1
,3
]}

Zang Y. ^{[2
]}

机构：

[1] China Academy of Machinery Science and Technology Group Co., Ltd., Beijing

[2] School of Mechanical Engineering, University of Science and Technology Beijing, Beijing

[3] College of Mechanical & Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing

来源：

Cailiao Daobao/Materials Reports | 2023年 / 37卷 / 01期

关键词：

casting property; microstructure; multi-material sand; sand formulation;

D O I：

10.11896/cldb.21080212

中图分类号：

学科分类号：

摘要：

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 studied. 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. © 2023 Cailiao Daobaoshe/ Materials Review. All rights reserved.

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