中文摘要：

采用常规粉末冶金方法制备无铅含铋铜-钢双金属轴承材料,在HDM-20端面摩擦磨损试验机上进行边界润滑条件下的摩擦磨损试验,分析无铅含铋铜-钢双金属轴承材料的减摩、抗粘着性能及其承载能力,并与典型的铜铅轴承材料（Cu10Sn10Pb）及铜锡合金材料的性能进行对比。结果表明：无铅含铋铜轴承材料中的低熔点组元铋（熔点为271℃）能阻碍因油膜破裂而引起的摩擦副局部区域的直接接触,体现出较好的减摩和抗粘着性能;当铋含量为3.0%（质量分数）时,无铅含铋铜基轴承材料的减摩,抗粘着咬合性能良好,承载能力较强,接近或优于典型铜铅轴承材料的性能。

英文摘要：

Lead-free Bi-contained copper-steel bimetal bearing materials were prepared by powder metallurgy method,their friction and wear tests were conducted by using the HDM-20 tribometer under boundary lubrication conditions.The anti-friction,anti-adhesion and load carrying capacity of the lead-free Bi-contained copper matrix bearing materials were also analyzed and compared with those of the typical copper-lead bearing material（Cu10Sn10Pb）.The results show that the addition of Bi can improve the anti-friction and anti-adhesion performances of the bearing materials because Bi with lower melting point（271 ℃） can be melted and move to the surface to prevent the direct contact of counterfaces as the oil films rupture during sliding,which results in good performances of anti-friction and anti-adhesion.To achieve better performances of anti-friction,anti-adhesion and load carrying capacity of the bearing materials,the optimal addition of Bi is 3.0%（mass fraction） under increasing loads,their performances are close to or better than those of the typical copper-lead bearing materials.