制造烧结金属含油轴承的高性能青铜粉

自润滑青铜轴承的性能决定于许多因素的综合作用,诸如精整后的密度、径向压溃强度(RCS)、含油量、表面粗糙度、施加的载荷、轴的速度及孔隙结构.压坯与烧结体的密度以及烧结时的尺寸变化(DC),在轴承制造中都很重要.这篇文章阐述了生产高使用性能烧结轴承用的一系列新的青铜粉末.对使用性能的测定表明,与用标准的预混合青铜粉末制造的轴承相比,这些轴承摩擦系数较小,温升较低且稳定,而且径向压溃强度较高.性能优异是因为连通孔隙结构较细小,从而通过极好的毛细作用可吸入大量油.在理论上,较高的RCS可使轴承具有较高的承受载荷的能力.     

Effect of regimes involving small loads on the tribological characteristics of self-lubricating slide bearings obtained from porous bronze containing antifriction additives

Translated from Poroshkovaya Metallurgiya, No. 12 (360), pp. 77–82, December, 1992.     

Effectiveness of self-lubricating bearings with a binary rubbing surface

Translated from Poroshkovaya Metallurgiya, No. 8(332), pp. 72–76, August, 1990.     

A method of prolonging the useful life of sintered self-lubricating bearings

Conclusions It is shown that the wear resistance and length of the self-lubrication period of a sintered material can be increased by filling its pores with oil containing polymer additions. The mechanism by which the presence of a polymer enables this improvement to be achieved is discussed.Translated from Poroshkovaya Metallurgiya, No. 2(158), pp. 90–93, February, 1976.     

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。     

Improving the effectiveness of boundary self-lubrication of powder bearings

Translated from Poroshkovaya Metallurgiya, No. 5(317), pp. 91–96, May, 1989.     

加工误差对气体静压径向轴承的影响

建立了一种考虑影响气膜厚度误差、圆度和圆柱度误差的气膜厚度分布综合表达式,考虑加工误差对气体静压径向轴承的影响,进行了气体润滑有限元分析.分析表明:圆度和圆柱度误差对轴承的承载能力影响不大:气膜厚度误差为平均气膜厚度的5%时,承载能力变化约为10%.     

Manufacture of small bearings from atomized powders

Conclusions Processes have been developed for the manufacture of atomized copper, tin, and bronze powders suitable for the bearings of the electric motors of domestic air conditioners. A technique has been developed for the production of small instrument journal bearings possessing good operating characteristics.Translated from Poroshkovaya Metallurgiya, No. 8(224), pp. 48–52, August, 1981.