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《Powder Metallurgy Technology》 2008-01
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Evaluation of Global PM oil-impregnated bearings

Howard Ⅰ.Sanderow1),Leander F.Pease Ⅲ,FAPMI,PMT Ⅱ2)1)(President,Management & Engineering Technologies,MET Group Inc.,161 Copperfield Drive,Dayton,Ohio 45415-1264,USA)2)(President,Powder-Tech Associates,Inc.,31 Flagship Drive,North Andover,Massachusetts,01845-6194,USA)  
Oil-impregnated porous powder metallurgy(PM)bearings are the earliest and most widely used PM product now manufactured throughout the world.A previous investigation of one bearing composition medium graphite-bronze found noticeable differences between bearings manufactured in North America versus similar products manufactured in Europe.A more detailed investigation has been completed which evaluated bearings from North America,Europe and Japan.Each location provided sample bearings from at least two manufacturers and two different alloys.The range of alloys included bronze,iron-copper and iron-graphite.The results confirmed previous findings that European bronze bearings differ from bearings manufactured in North America and Japan,now attributed to differences in the base copper powders.Differences were also found in the crushing strength of iron-graphite beatings manufactured in North America and Japan.The findings from these studies are presented including micrographs that confirm the differences in mechanical properties.Implications in relation to the Global standard ISO 5755 are also assessed.
【CateGory Index】: TF124.5
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