欧洲与北美制造的烧结青铜含油轴承性能的比较

多孔性青铜含油轴承是全世界都在生产的，最早与最无处不用的现代粉末冶金产品。然而，各地区产品之间仍存在着明显差异。近期发布的粉末冶金材料的全球标准ISO5755，其中有2个描述轴承材料性能的数据表。其中列举的几项关键性轴承特性和MPIF标准35或相应的ASTM标准中列出的轴承性能有所不同。因此，MPIF标准委员会进行一项小型试验，对标准90％（质量分数）Cu-10％（质量分数）Sn轴承的关键特性进行了对比。这项研究的样品零件来自欧洲与北美的大批量生产厂家。数据证实孔隙度与径向压溃强度不同，这种差异是原料粉与制造工艺的微妙差异所致。最终用户应该了解这些差异，和确认IS05755中列举的特性能满足他们对轴承的要求。

Property comparison of PM bronze bearings manufactured in Europe and North America

Oil-impregnated,porous ronze bearings,the earliest and most ubiquitous modern powder metallurgy(PM)product,are manufactured worldwide.Yet clear product differences exist from region to region.The recent global standard ISO 5755 for PM materials includes two data tables describing the properties of bearing materials.Several critical bearing characteristics cited are at variance with the bearing properties listed in MPIF Standard 35,or the corresponding ASTM standard.In consequence,the MPIF Standards Committee undertook a small test program to compare and contrast the critical features of a standard 90 wt% Cu-10 wt% Sn bearing.Sample parts were obtained from commercial production sources in Europe and North America for this study.The data confirm differences in porosity and radial-crushing strength,which are attributed to subtle differences in raw materials and manufacturing techniques.End users should be aware of these differences,and confirm that the characteristics cited in ISO 5755 are adequate for their bearing requirements.