石墨覆盖率对铜合金镶嵌石墨材料摩擦磨损性能的影响  

Effect of Graphite Coverage Rate on Friction and Wear Properties of Copper Alloy Inlaid with Graphite

作　　者：王文东[1,2] 黄彧 WANG Wendong;HUANG Yu(Shanghai Research Institute of Materials,Shanghai 200437,China;Shanghai Research Key Laboratory for Engineering Materials Evaluation,Shanghai 200437,China;CGN Testing Technology Co.,Ltd.,Suzhou 215000,China)

机构地区：[1]上海材料研究所,上海200437 [2]上海市工程材料应用与评价重点实验室,上海200437 [3]中广核检测技术有限公司,江苏苏州215000

出　　处：《热加工工艺》2022年第4期77-81,共5页Hot Working Technology

基　　金：上海市强基专项(上海经济和信息化委员会)项目(GYQJ-2019-1-24)。

摘　　要：采用两种石墨(S1、S2)镶嵌于铜合金Cu15Ni8Sn经过机加工制备了圆环试样,并与05Cr17Ni4Cu4Nb不锈钢块组成摩擦副,研究了两种不同石墨覆盖率(32%、43%)对其摩擦磨损性能的影响。结果表明:S1型石墨随着石墨覆盖率的增大摩擦系数和磨损量增大,S2型石墨随着石墨覆盖率的增大摩擦系数和磨损量减小。石墨的表面覆盖率影响了不同Cu/石墨复合材料的摩擦磨损性能,其摩擦系数和磨损量在S2型石墨表面覆盖率为43%时最小,摩擦系数为0.13。S1型石墨随着石墨含量的增加,铜合金基体的强度、硬度及冲击韧性明显下降,承载能力也随之下降,导致铜合金表面在对磨时容易发生塑性变形,摩擦系数磨损量增大,S2型石墨含有Ag元素,Ag元素的添加增强了铜环基体的强度,因此,镶嵌石墨比例越高摩擦系数和磨损量越大。Two kinds of graphite(S1, S2) were embedded in copper alloy Cu15Ni8Sn, and the ring specimens were machined to form friction pairs with 05Cr17Ni4Cu4Nb stainless steel blocks. The effects of two kinds of graphite coverage(32%, 43%) on the friction and wear properties of the composites were studied. The results show that the friction coefficient and wear of S1 type graphite increase with the increase of graphite coverage, while the friction coefficient and wear of S2 type graphite decrease with the increase of graphite coverage. The surface coverage of graphite affects the friction and wear properties of different Cu/graphite composites, and the friction coefficient and wear amount of S2 graphite are the smallest when the surface coverage of S2 graphite is 43%, which is 0.13. With the increase of S1 graphite content, the strength,hardness and impact toughness of the copper alloy matrix decrease obviously, and the bearing capacity also decreases, which leads to the plastic deformation of the copper alloy surface and the increase of the friction coefficient and wear. The S2graphite contains silver element, and the addition of silver element enhances the strength of the copper ring matrix. Therefore,the higher the proportion of embedded graphite, the greater the friction coefficient and wear.

关 键 词：石墨 铜合金 覆盖率 摩擦磨损 

分 类 号：TB333.12[一般工业技术—材料科学与工程]