Mg2B2O5W,SiC和Gr颗粒增强6061Al基复合材料的摩擦磨损行为

doi:10.11868/j.issn.1001-4381.2015.10.007

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摘要

采用粉末热挤压法制备2%Mg₂B₂O_5w/6061Al,2%Gr/6061Al,2%SiC_p/6061Al,2%Mg₂B₂O_5w+2%Gr/6061A,2%Mg₂B₂O_5w+2%SiC_p/6061Al,2%Mg₂B₂O_5w+2%Gr+2%SiC_p/6061Al单一及混杂增强的铝基复合材料,并对其耐磨性和摩擦行为进行研究。结果表明:随着载荷的增大,各种复合材料的磨损率均增大,石墨的添加增大了铝基复合材料的磨损率;复合材料的摩擦因数随载荷的增大而降低并趋于稳定,摩擦因数均介于0.22~0.32之间。未加入石墨的复合材料的磨损机制以磨料磨损和轻微的黏着磨损为主,加入石墨后复合材料的磨损机制转变为剧烈的黏着磨损。

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	丁雨田
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	马国俊

关键词 ：粉末热挤压, 增强体, 铝基复合材料, 摩擦磨损

Abstract：

Single and hybrid Al matrix composites with 2%Mg₂B₂O_5w/6061Al,2%Gr/6061Al,2%SiC_p/6061Al,2%Mg₂B₂O_5w+2%Gr/6061Al, 2%Mg₂B₂O_5w+2%SiC_p/6061Al, 2%Mg₂B₂O_5w+2%Gr+2%SiC_p/6061Al reinforcements were prepared by powder hot extrusion process, and the wear resistance and the friction behaviour of the single and hybrid Al matrix composites were studied. The results show that the wear rates of all kinds of the composites increase with the load increasing, the wear rate of Al matrix composites increase with the addition of graphite, the friction coefficients of all kinds of the composites decrease with the load increasing and then become stabilized, the friction coefficient is between 0.22 to 0.32. Abrasive wear and slight adhesive wear dominate the wear mechanism of Al matrix composites without graphite, after the addition of graphite, the wear mechanism of Al matrix composites converts into serious adhesive wear.

Key words： powder hot extrusion reinforcement aluminum matrix composite friction and wear

收稿日期: 2014-11-17 出版日期: 2015-10-17

通讯作者: 丁雨田 E-mail: dingyutian@126.com

作者简介: 丁雨田(1962-),男,教授,博士生导师,主要从事热型连铸技术制备新材料、新型医用镁合金、镍及合金、金属基复合材料等方向的研究,联系地址:甘肃省兰州市七里河区兰工坪路287号材料学院(730050),E-mail:dingyutian@126.com

引用本文:

丁雨田, 王冬强, 胡勇, 彭和思, 马国俊. Mg₂B₂O_5W,SiC和Gr颗粒增强6061Al基复合材料的摩擦磨损行为[J]. 材料工程, 2015, 43(10): 42-48.
Yu-tian DING, Dong-qiang WANG, Yong HU, He-si PENG, Guo-jun MA. Friction and Wear Behavior of Mg₂B₂O_5w, SiC and Gr Particles Reinforced 6061Al Matrix Composite. Journal of Materials Engineering, 2015, 43(10): 42-48.

链接本文:

http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2015.10.007 或 http://jme.biam.ac.cn/CN/Y2015/V43/I10/42

Table 1 基体合金和复合材料的力学性能

Fig.1 复合材料的SEM照片和EDS分析
(a)2%Mg₂B₂O_5w+2%Gr/6061Al的SEM图片；(b)2%Mg₂B₂O_5w+2%Gr/6061Al中Gr的SEM图片； (c)2%Mg₂B₂O_5w+2%SiC_P/6061Al的SEM图片；(d)(a)中增强相A的EDS分析； (e)(a)中增强相B的EDS分析；(f)(a)中增强相C的EDS分析

Fig.2 不同载荷下6种复合材料的磨损率

Fig.3 不同载荷下6种复合材料摩擦因数

Fig.4 载荷为30N时6种复合材料摩擦表面SEM图片
(a)2%Mg₂B₂O_5w/6061Al；(a)2%Gr/6061Al；(c)2%SiC_P/6061Al；(d)2%Mg₂B₂O₅w+2%Gr /6061Al； (e)2%Mg₂B₂O_5w+2%SiC_P/6061Al；(f)2%Mg₂B₂O_5w+2%Gr+2%SiC_P/6061Al

Fig.5 富铁黏附层的EDS分析

Fig.6 载荷30N下6种复合材料磨损表面EDS分析

Fig.7 30N负载下3种复合材料磨屑的SEM图像
(a)2%Mg₂B₂O_5w+2%Gr/6061Al；(b)2%Mg₂B₂O_5w+2%SiC_P/6061Al；(c)2%Mg₂B₂O_5w+2%Gr+2%SiC_P/6061Al

Fig.8 30N载荷下3种复合材料对偶件的摩擦表面及光镜显微照片
(a)2%Mg₂B₂O_5w+2%Gr/6061Al；(b)2%Mg₂B₂O_5w+2%SiC_P/6061Al；(c)2%Mg₂B₂O_5w+2%Gr+2%SiC_P/6061Al

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