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    • 22. 发明授权
    • Sintered iron alloy resistant to abrasion at high temperature and method
of manufacturing the same
    • 耐高温磨损的烧结铁合金及其制造方法
    • US5529602A
    • 1996-06-25
    • US392183
    • 1995-02-22
    • Kei IshiiYoshimasa AokiHideaki KawataAkira FujikiKatsuyuki NakamuraKazuhiko Takahashi
    • Kei IshiiYoshimasa AokiHideaki KawataAkira FujikiKatsuyuki NakamuraKazuhiko Takahashi
    • C22C33/02C22C38/00C22C38/60F01L3/04F02B1/04F02B3/06C22C29/00
    • F01L3/04C22C33/0207C22C33/0285F02B1/04F02B2275/18F02B3/06Y10T428/12042
    • Disclosed is a sintered iron alloy and a method of manufacturing the same. The sintered alloy comprises: an alloy matrix and a lead phase for imparting lubricability to the sintered alloy. The alloy matrix comprises a first alloy phase being composed of 0.5 to 3% nickel by weight, 0.5 to 3% molybdenum by weight, 5.5 to 7.5% cobalt by weight, 0.6 to 1.2% carbon by weight, and the balance iron, and a second alloy phase being composed of 26 to 30% molybdenum by weight, 7 to 9% chromium by weight, 1.5 to 2.5% silicon by weight, and the balance cobalt. The content of the lead phase in the sintered alloy is not more than 3.5% by weight. The lead phase is dispersed in the alloy matrix and a pore which is formed in the alloy matrix. The ratio of the lead dispersed in the alloy matrix to the total lead phase is 60% by weight or more, and the lead phase dispersed in the alloy matrix is particles in which the maximum particle size is 10 .mu.m or less. In manufacture, a lead powder having a particle size of approximately 50 .mu.m or less is mixed a first raw material powder for the first alloy phase and a second raw material powder for the second alloy phase at a lead content of not more than 3.5% by weight. After compacting and sintering the mixture, the sintered compact is cooled so that the temperature of the compact in the vicinity of 328.degree. C. is cooled at a cooling rate of approximately 2.degree. C./min. or more.
    • 公开了一种烧结铁合金及其制造方法。 烧结合金包括:赋予烧结合金润滑性的合金基体和铅相。 该合金基体包括第一合金相,其由0.5-3重量%的镍,0.5-3重量%的钼,5.5-7.5重量%的碳,0.6-1.2重量%的碳和余量的铁组成, 第二合金相由26〜30重量%的钼,7〜9重量%的铬,1.5〜2.5重量%的硅和余量的钴组成。 烧结合金中铅相的含量不超过3.5重量%。 铅相分散在合金基体中,并形成在合金基体中的孔。 分散在合金基体中的铅与总铅相的比例为60重量%以上,分散在合金基体中的铅相是最大粒径为10μm以下的粒子。 在制造时,将粒径约为50μm以下的铅粉末,以不超过3.5%的铅含量混合第一合金相的第一原料粉末和第二合金相的第二原料粉末, 重量。 压实烧结混合物后,将烧结体冷却至328℃附近的压坯温度以约2℃/分钟的冷却速度冷却。 或者更多。