Squeezing Casting SiC<sub>p</sub>/ZL111 Aluminum Matrix Composites

Jiang Kaiyan1; Xiao Tianyang1; Sun Jue2

doi:10.15980/j.tzzz.2013.06.020

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Squeezing Casting SiC_p/ZL111 Aluminum Matrix Composites
Vol. 33, Issue 6, Pages: 532-535(2013)
Published： 2013 ，
DOI： 10.15980/j.tzzz.2013.06.020

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[1]蒋凯雁,肖天洋,孙珏.挤压铸造SiC_p/ZL111铝基复合材料[J].特种铸造及有色合金,2013,33(06):532-535.

Jiang Kaiyan1, Xiao Tianyang1, Sun Jue2. Squeezing Casting SiC_p/ZL111 Aluminum Matrix Composites. [J]. Special Casting & Nonferrous Alloys 33(6):532-535(2013)
[1]蒋凯雁,肖天洋,孙珏.挤压铸造SiC_p/ZL111铝基复合材料[J].特种铸造及有色合金,2013,33(06):532-535. DOI： 10.15980/j.tzzz.2013.06.020.

Jiang Kaiyan1, Xiao Tianyang1, Sun Jue2. Squeezing Casting SiC_p/ZL111 Aluminum Matrix Composites. [J]. Special Casting & Nonferrous Alloys 33(6):532-535(2013) DOI： 10.15980/j.tzzz.2013.06.020.

摘要

研究了含量为20%的SiC颗粒增强ZL111铝基复合材料锭重熔后

挤压铸造件的组织和性能。结果表明

可以采用卧式挤压铸造方法制备铝基复合材料铸件

浇注温度为710℃

挤压冲头速度为0.4m/s

比压为135MPa;组织内SiC颗粒分布仍然保持分散

没有发生团聚

铸件不同部位SiC含量基本一致;但是SiC颗粒只分布在共晶组织内;铸件耐磨性显著提高

导致切削加工刀具磨损急剧增加

但布氏硬度（HB）为76.7～94.4

与ZL111铝合金相差不多。

Abstract

The microstructure and properties of squeezing casting ZL111 aluminum matrix composites with 20% silicon carbide particles by horizontal squeezing casting machine were investigated. The results show that the composites can be prepared by horizontal squeezing casting with specific pressure of 135 MPa and extrusion punches speed of 0.4 m/s as well as pouring temperature of 710 ℃. The silicon carbide particles are uniformly distributed in the microstructure

and absence of aggregation of the SiCp can be observed

so the SiCp content is uniform in the composites samples. In addition

the SiC particles are distributed only in the eutectic structure in the composites samples. Wear resistance of the composite samples is significantly improved

leading to a sharp wear of cutting tool. Meanwhile

the Brinell hardness is in range of 76.7HB～94.4HB

which is basically near to that of ZL111 alloy.