Effects of Squeezing Casting on Microstructure and Properties of In-Situα-Al<sub>2</sub>O<sub>3p</sub>/ZL109 Composites

Zhang Zailei; Chen Gang; Zhao Yutao; Meng Ming′ai

doi:10.15980/j.tzzz.2017.01.022

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Effects of Squeezing Casting on Microstructure and Properties of In-Situα-Al₂O_3p/ZL109 Composites
Vol. 37, Issue 1, Pages: 83-86(2017)
Published： 2017 ，
DOI： 10.15980/j.tzzz.2017.01.022

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[1]张再磊,陈刚,赵玉涛,孟明艾.挤压铸造对α-Al_2O_3p/ZL109复合材料组织与性能的影响[J].特种铸造及有色合金,2017,37(01):83-86.

Zhang Zailei, Chen Gang, Zhao Yutao, et al. Effects of Squeezing Casting on Microstructure and Properties of In-Situα-Al₂O_3p/ZL109 Composites. [J]. Special Casting & Nonferrous Alloys 37(1):83-86(2017)
[1]张再磊,陈刚,赵玉涛,孟明艾.挤压铸造对α-Al_2O_3p/ZL109复合材料组织与性能的影响[J].特种铸造及有色合金,2017,37(01):83-86. DOI： 10.15980/j.tzzz.2017.01.022.

Zhang Zailei, Chen Gang, Zhao Yutao, et al. Effects of Squeezing Casting on Microstructure and Properties of In-Situα-Al₂O_3p/ZL109 Composites. [J]. Special Casting & Nonferrous Alloys 37(1):83-86(2017) DOI： 10.15980/j.tzzz.2017.01.022.

摘要

采用半固态搅拌技术向铝熔体中加入SiO

粉末

通过熔体原位反应成功制备了α-Al

/ZL109复合材料

并在不同挤压力下对复合材料进行了成形试验。利用扫描电镜和X射线衍射仪对复合材料的微观组织和相组成进行了分析

并测试了其力学性能。结果表明

挤压铸造原位α-Al

/ZL109复合材料铸件内部缺陷少、增强颗粒均匀分散;挤压铸造后

复合材料在铸态和热处理态的抗拉强度、硬度、伸长率均明显高于ZL109合金

且随挤压力增加而提高。

Abstract

Alumina particle reinforced aluminum matrix composites were prepared successfully by in-situ reaction in melt after adding SiO

powder into aluminum melt via semi-solid mechanical stirring technique.The fabrication of the composites under different squeezing pressures was also investigated.The micro-structure and phase constituent of the composites prepared were analyzed by scanning electron microscope and X-ray diffraction

meanwhile

the tensile properties of the composites were measured.The results reveal that the internal defects of squeeze-casting composites are decreased greatly

and the reinforcement particles are distributed homogeneously into the composites.With the increase of squeezing pressure

the tensile strength

hardness and elongation of both the as-cast and T6heat-treated composites are the higher than those of the matrix ZL109 alloy.Meanwhile

these properties are increased with the increase of squeezing pressure.