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在转速为1 500～7 000 r/min、比压为1.1～3.9 MPa条件下,以65Mn钢为对摩副,以15 W油为冷却介质,研究了三维网络SiC/Cu复合材料在油流量为8 mL/(min.cm2)时的摩擦性能.结果表明,三维网络SiC/Cu复合材料摩擦片的摩擦系数较粉末冶金摩擦片的摩擦系数有大幅度提高;粉末冶金片与三维网络SiC/Cu复合材料片具有不同的失效机制:粉末冶金片的失效机制是表面裂纹和“过铜”(对偶中铜的转移),三维网络SiC/Cu复合材料片的失效机制以“过铁”(对偶中铁的转移)导致的SiC骨架被覆盖而失去作用为主;2种摩擦片与65Mn钢对摩的过程中都伴随着不同程度的氧化磨损,但粉末冶金片的主要磨损机理为磨粒磨损,而三维网络SiC/Cu复合材料片的磨损机理主要表现为“材料转移”导致的黏着磨损.
Under the conditions of rotating speed of 1 500 ~ 7 000 r / min and specific pressure of 1.1 ~ 3.9 MPa, 65Mn steel was used as the friction pair and 15W oil was used as the cooling medium. The effects of three-dimensional network SiC / Cu composite on oil flow rate (Min.cm2) is 8 mL / (min.cm2) .The results show that the friction coefficient of the three-dimensional network SiC / Cu composite friction plates is much higher than the friction coefficient of the powder metallurgy friction plates, the friction coefficient between the powder metallurgy plates and the three-dimensional network SiC / Cu composite sheet has different failure mechanisms: the failure mechanism of the powder metallurgy sheet is the surface crack and “over copper ” (dual copper transfer), the failure mechanism of the three-dimensional network SiC / Cu composite sheet to “(Dual transfer of iron) caused by the SiC skeleton is covered and lost the role of the main; 2 kinds of friction plates and 65Mn steel friction are accompanied by varying degrees of oxidation wear, but the main wear mechanism of powder metallurgy Abrasive wear, while the wear mechanism of the three-dimensional network SiC / Cu composite sheet is mainly manifested as ”wear and tear caused by material transfer".