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    • 6. 发明申请
    • MIXTURE FOR POWDER METALLURGY PRODUCT AND METHOD FOR PRODUCING THE SAME
    • 用于粉末冶金产品的混合物及其生产方法
    • WO02038314A1
    • 2002-05-16
    • PCT/US2001/042933
    • 2001-11-09
    • B22F1/00B22F3/17C22C33/02C22C38/00C22C38/18B22F3/12
    • C22C33/0207B22F2998/00C22C33/0221C22C33/0228B22F5/10
    • A mixture for a powder metallurgy product, including iron powder, graphite powder and copper (Cu) of about 3.0 to about 5.0 weight percent. Iron powder includes iron grains which contain MnS therein. The mixture contains the MnS of about 0.65 to about 1.40 weight percent. The graphite powder is contained in the mixture such that an amount of carbon (C) in the powder metallurgy product is about 3.0 to about 7.0 weight percent. An amount (wt%C) of the carbon and an amount (wt%Cu) of the copper is determined to obtain a target fatigue strength FS (MPa) and a target hardness HR (HRB) based on a relation FS = 66.63 x (wt%C) + 22.61 x (wt%Cu) + 280.84; HR = 22.96 x (wt%C) + 2.99 x (wt%Cu) + 78.91.
    • 一种粉末冶金产品的混合物,包括约3.0至约5.0重量%的铁粉,石墨粉和铜(Cu)。 铁粉包括含有MnS的铁粒子。 该混合物含有约0.65至约1.40重量%的MnS。 该混合物中含有石墨粉末,使得粉末冶金产品中的碳(C)的量为约3.0至约7.0重量%。 根据FS = 66.63×(关系式)求出碳的量(重量%C)和铜的量(Cu重量%),以获得目标疲劳强度FS(MPa)和目标硬度HR(HRB) wt%C)+ 22.61×(wt%Cu)+ 280.84; HR = 22.96×(重量%C)+ 2.99×(重量%Cu)+ 78.91。
    • 9. 发明申请
    • METHOD FOR MANUFACTURING POWDER METALLURGICAL TOOLING
    • 制造粉末冶金工具的方法
    • WO9847833A2
    • 1998-10-29
    • PCT/US9808034
    • 1998-04-21
    • VAWTER PAUL D
    • VAWTER PAUL D
    • B22F3/12B22F3/17B28B1/26B28B7/34C04B35/565C04B35/00
    • B28B1/26B22F3/1283B22F3/17B22F2999/00B28B7/346C04B35/565B22F3/1028B22F3/14
    • A method of forming a refractory die, and a method for forming a metal article using a refractory die. The refractory die is formed of a ceramic material by casting a slurry containing particles of the ceramic material onto a mold. Then the mold is vibrated while excess liquid medium from the slurry is simultaneously removed, whereby ceramic particles continue to flow into surface details of the mold. The present method of forming a refractory die minimizes drying and firing shrinkage, and even adjusts for drying and firing shrinkage by inclusion of kyanite in the refractory die. According to the method of forming a metal article, a particulate material containing powdered metal is compressed on a refractory die at an elevated temperature and pressure. The consolidated particulate material is differentially cooled, wherein a first, low mass portion contacting the refractory die is cooled more quickly than an opposing, high mass portion of the consolidated body. According to this method, hot tears are prevented.
    • 耐火模具的形成方法以及使用耐火模具形成金属​​制品的方法。 耐火模具由陶瓷材料形成,通过将含有陶瓷材料的颗粒的浆料浇铸到模具上。 然后模具振动,同时从浆料中过量的液体介质被同时去除,由此陶瓷颗粒继续流入模具的表面细节。 本发明的耐火模具的形成方法使干燥和焙烧收缩率最小化,甚至通过在耐火模具中包含蓝晶石来调节干燥和焙烧收缩。 根据金属制品的形成方法,在高温高压下,在耐火模具上压制含有粉末金属的颗粒材料。 固结的颗粒材料被差异冷却,其中与耐火模具接触的第一低质量部分比固结体的相对的高质量部分更快地冷却。 根据该方法,可以防止热泪。