Friction and Wear Behavior of Squeeze-Cast 10SiC<sub>p</sub>/A356 Composites

Deng Dejie; Zhao Haidong; Li Fangdong

doi:10.15980/j.tzzz.2018.12.013

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Friction and Wear Behavior of Squeeze-Cast 10SiC_p/A356 Composites
Vol. 38, Issue 12, Pages: 1327-1331(2018)
Published： 2018 ，
DOI： 10.15980/j.tzzz.2018.12.013

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[1]邓德杰,赵海东,李芳东.挤压铸造10SiC_p/A356铝基复合材料的摩擦磨损性能[J].特种铸造及有色合金,2018,38(12):1327-1331.

Deng Dejie, Zhao Haidong, Li Fangdong. Friction and Wear Behavior of Squeeze-Cast 10SiC_p/A356 Composites. [J]. Special Casting & Nonferrous Alloys 38(12):1327-1331(2018)
[1]邓德杰,赵海东,李芳东.挤压铸造10SiC_p/A356铝基复合材料的摩擦磨损性能[J].特种铸造及有色合金,2018,38(12):1327-1331. DOI： 10.15980/j.tzzz.2018.12.013.

Deng Dejie, Zhao Haidong, Li Fangdong. Friction and Wear Behavior of Squeeze-Cast 10SiC_p/A356 Composites. [J]. Special Casting & Nonferrous Alloys 38(12):1327-1331(2018) DOI： 10.15980/j.tzzz.2018.12.013.

摘要

采用搅拌铸造法制备了SiC

颗粒含量为10%的SiC

/A356铝基复合材料熔体

分别在0.1（重力）、50、75和100MPa的挤压压力下进行挤压铸造

并将制得的复合材料与HT250进行对磨试验

研究了不同挤压压力下复合材料的摩擦磨损性能。结果表明

随着挤压压力增加

复合材料的孔隙率减小

致密度和硬度均增大;在铸态和T6态下

复合材料的磨损率减小

摩擦因数增大。挤压压力有效提高了颗粒与基体的界面结合强度

挤压压力为100 MPa时

SiC

发生破裂而脱落

磨损机理为磨粒磨损。

Abstract

10 SiC

/A356 composites were fabricated by stirring casting and direct squeeze casting process under applied pressures of 0.1（gravity）

75 and 100 MPa.The effects of the squeeze pressures on the friction and wear behavior of the composites were investigated by the wear test with HT250.The results show that under the as-cast and T6-threated condition

as the applied pressures increase

the porosity is decreased

while the density and hardness are increased.The wear rate of the composites is decreased and the friction coefficient is increased.The applied pressures can improve effectively the interface bonding strength between the particles and matrix.With the squeeze pressures of 100 MPa

the SiC particles can be broken off and the wear mechanism is characterized by abrasive wear.