半固态搅拌参数对A356-10%B<sub>4</sub>C<sub>p</sub>复合材料显微组织的影响

doi:10.11896/cldb.18120077

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Abstract In this paper, a semi-solid stirring and hot rolling process was used to prepare A356-10%B₄C_p composite sheet, the effects of semi-solid stirring parameters on the as-cast and hot-rolled microstructures of the A356-10%B₄C_p composites were studied. It is found that, when the mi-xing temperature is 580 ℃, the mixing time is 15 min, stirring speed is within 800 r/min, the average diameter and roundness of α-Al grains decrease with the increase of stirring speed, and the distribution of B₄C particles tends to be uniform. When the stirring speed exceeds 800 r/min, the average diameter and roundness of α-Al did not decrease, and the distribution of B₄C particles tends to be nonuniform. When the mixing temperature is 580 ℃, stirring speed is 800 r/min, stirring time is within 5—35 min, the average diameter and roundness of α-Al decreased with the increase of stirring time, and the distribution of B₄C particles was also uniform. The optimum technological parameters are as follows: stirring temperature is 580 ℃, stirring speed is 800 r/min, stirring time is 35 min. The A356-10%B₄C_p composite plate with smooth surface can be obtained after hot rolling of the composite ingot prepared by the process.

Key words： aluminum matrix composites hot rolling microstructure particles reinforced

Published: 26 April 2020

CLC number:

TG146.2

Fund:This work was financially supported by the National Natural Science Foundation of China (51474063).

Corresponding Authors: Renguo Guangraduated from Northeast University in 2003 and received a doctorate. From March 2003 to April 2004, he studied postdoctoral in the Department of Materials, Puxiang University of Technology, Korea, and he is a professor of Northeastern University. He presided over more than 20 projects of National 863 Program, National Excellent Youth Science Foundation, National Natural Science Foundation Key and Top Projects, Ministry of Education New Century Talents Program, Ministry of Education Fok Yingdong Young Teachers Foundation, and Provincial Science and Technology Program. Published more than 140 papers, more than 40 papers included by SCI,more than 80 papers included by EI, editor-in-chief published one academic monograph, participated in the publication of one translation.

About author:: Xuefei Zhang, associate professor of Shenyang University. In 2007, Ph. D. graduated from Northeast University, majoring in material processing. Her main research directions are: research on processing technology and structure and properties of new materials. She has presided over the research of the National Natural Scie-nce Foundation of China (a sub-project) on “Basic Research on the Application of HA Coated Mg-Zn-Sr Alloy Biomaterials”.She has participated in the research of “Evolution of Precipitate Phase in Continuous ECAE Dynamic Aging Process of Aluminum Alloy Conductors and Mechanism of Performance Strengthening”, and has published more than 10 papers.

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Cite this article:

ZHANG Xuefei,BAI Jingyuan,GUAN Renguo. Effect of Parameters of Semi-solid Stirring on Microstructure of A356-10%B₄C_p Composites[J]. Materials Reports, 2020, 34(10): 10103-10107.

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http://www.mater-rep.com/EN/10.11896/cldb.18120077 OR http://www.mater-rep.com/EN/Y2020/V34/I10/10103

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