1.粉末冶金工艺概述上海赫格拉斯粉末冶金学校培训教材

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1、PowderMetallurgyOverviewOfThePMProcess粉末冶金工艺概述PowderMetallurgyWhatisPowderMetallurgyProcess?什么是粉末冶金工艺？WhatisPowderMetallurgy?PMisanart&scienceof:-粉末冶金是艺术和科学的结合:1.ManufacturingMetalPowdersandcustomizedmixes是制造金属及其混粉的方法2.Convertingtocomponentsbycompactioninrigiddies

2、usingvarioustypesofcompactingpresses.通过各种不同类型的压机，将粉末压制进刚性的模具,成形零件3.Sinteringformetallurgicalbondingattime&temperatureunderprotectiveatmosphereinsinteringfurnaces.在保护性气氛下，在烧结炉内在一定温度和时间下烧结，颗粒间冶金连接4.Impartingspecialpropertieswithpostsinteringoperations通过后处理，可以得到一些特殊的

3、性能。P/F,HIP,CIPandMIMarenotconsideredhereindefinition粉末锻造，热,冷等静压和金属注射成形是不在此讨论的。HöganäsPowderProductionProcesses赫格纳斯粉末生产工艺过程SPONGEIRONPOWDERS还原铁粉WATERATOMIZEDIRON&STEELPOWDERS雾化铁粉和钢粉IronPowderParticleShape铁粉颗粒形状Atomizedpowder雾化铁粉Spongepowder还原铁粉SEMCrosssectionASC100

4、.29NC100.24PowderMetallurgyWhatisthesizedistributionofPowdersusedforcompaction?什么是压制粉末的粒径分布？PowderSizes粉末尺寸Coarsegrade粗粒径:>150microns<425micronsPMPowder粉末冶金粉末:<150microns(15-30%-45Micron)MediumFine中等粒径:<45micronsFinePowder细粉末:10micronsto1micronUltrafinePowder超细粉末:

5、1micronto0.1micronNanoPowder纳米粉末:0.1micronto0.01micronMIMusesfinepowder金属注射成形所用的是细粉末SieveSizes筛分粒径MESH目Micron微米3060040425503006025080180100150140106200752306332545PMProcess粉末冶金过程PMProcesses-PostSintering粉末冶金后处理IndustrialPowderCompaction工业粉末压制ByPaulSkoglund,Höganäs

6、ChinaLtdPowderCompaction粉末压制Press压机CompactionTool模具ßUpperpunchß上模冲Powderwithlubricant粉末和润滑剂ßTooldie阴模ßCorerod芯棒ßLowerpunch下模冲Typicalpressure4–8ton/cm2常用压力在4-8ton/cm2MultiplatenToolAdaptor多台阶的模具组PowderPressing粉末压制•ShapethePowderintoacomponentwithdesiredgeometry使粉末成

7、形为所设计的零件形状•DensifyPowderinordertoCreateStrength粉末致密化使之具有一定的强度DensityvsMechanicalPerformance密度与力学性能关系CostvsDensity零件密度与成本的关系forvariousP/Mmanufacturingmethods不同的PM制造工艺2Powder1,8Forging粉末锻造1,62P2S复压复烧Cuinfiltration1,4渗铜1,2RelativecostWarmCompaction温压11P1S普通压制0,86,877

8、,27,47,67,88Density(g/cc)IndustrialCompactionPresses工业压机ßMechanicaltype机械压机ßHydraulictype液压压机ß20ton–2000ton(max.compactionforce)20～2000吨压机（最大压制力）ß2spm–3