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公开(公告)号：US4204031A
公开(公告)日：1980-05-20
申请号：US855964
申请日：1977-11-30
申请人： Kazutoshi Takemura , Takashi Oda , Fumio Kiyota
发明人： Kazutoshi Takemura , Takashi Oda , Fumio Kiyota
CPC分类号： C22C33/0257 , C22C33/0207 , B22F2998/10 , B22F2999/00
摘要： A novel group of iron-base sintered alloys especially suitable for valve seat manufacture having excellent wear resistance and good machinability is provided. The alloy is produced by a combination of specific atomized pre-alloyed powder, iron powder and graphite powder by compacting and sintering processes. Various manufacturing methods with or without infiltration of filler materials into pores in the sintered product to improve wear resistance and machinability are disclosed.
摘要翻译： 提供了一种新型的铁基烧结合金，特别适用于阀座制造，具有优异的耐磨性和良好的机械加工性。 该合金通过压实和烧结工艺由特定雾化的预合金粉末，铁粉和石墨粉末的组合制成。 公开了有或没有将填料材料渗透到烧结产品中的孔中以提高耐磨性和可加工性的各种制造方法。
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2.发明授权
公开(公告)号：US5080713A
公开(公告)日：1992-01-14
申请号：US338167
申请日：1989-04-14
申请人： Akiyoshi Ishibashi , Kazutoshi Takemura , Makoto Abe , Akira Fujiki , Kimitsugu Kiso , Takaaki Ito
发明人： Akiyoshi Ishibashi , Kazutoshi Takemura , Makoto Abe , Akira Fujiki , Kimitsugu Kiso , Takaaki Ito
CPC分类号： C22C33/0264 , C22C33/0207 , F02F7/0085
摘要： A material for valve seats comprising a wear resisting sintered ferro alloy formed by dispersing particles of a high speed steel in a matrix in which hard alloy particles are dispersed. Steps for forming include mixing particles of a matrix material, carbide material and a hard alloy, and blending the mixture with high speed steel particles, pressurizing and compacting the mixture after blending, then sintering them at 1000.degree. to 1200.degree. C. In the preferred method, at least one element of Fe, C, Ni, Co, Si or Mn is included as the matrix material, and at least one element of Fe, Cr, Mo or V as the carbide material and at least one element of Fe, Cr, Mo, Co, C or W as the hard alloy are prepared. Furthermore, the ferro alloy preferably includes the following amounts of the above mentioned elements, 0.5 to 2.0 wt % of C, 1 to 25 wt % of one or more of Cr, Mo, V, or W and 1 to 15 wt % of one or more of Co, Ni, Mn, or Si.
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公开(公告)号：US5158601A
公开(公告)日：1992-10-27
申请号：US831925
申请日：1992-02-06
CPC分类号： B22F1/025 , C22C33/0257
摘要： In a method for producing by a powder-metallurgical method a wear-resistant iron-based sintered alloy, which essentially consists of from 0.3 to 2.5% by weight of C, from 1 to 8% of Cu, from 3 to 14% of at least one element selected from the group consisting of Cr, Mo, W, V, Nb, and Ta, and Fe and the unavoidable impurities in balance, and which has a micro-structure such that a majority of the alloying elements are uniformly dissolved as solutes of the iron matrix and fine Cu phase is uniformly dispersed, a composite powder which consists of iron or iron alloy and Cu which is present mainly on the surface of the composite powder is used in the raw-material powder.
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公开(公告)号：US4233073A
公开(公告)日：1980-11-11
申请号：US899110
申请日：1978-04-24
申请人： Kazutoshi Takemura
发明人： Kazutoshi Takemura
CPC分类号： C22C33/0292 , C22C33/0207 , C22C33/0257 , C22C38/52
摘要： An iron-base sintered alloy especially suitable for valve seat manufacture having excellent wear resistance and being able to be machine-cut is provided. The alloy is produced by combining specifically atomized pre-alloyed powder, iron powder, nickel powder and graphite powder by means of compacting and sintering processes, and has a microstructure comprising pearlite and globular hard alloy phase formed with said atomized pre-alloyed hard alloy powder uniformly dispersed in said pearlite and martensite surrounding said hard alloy phase.
摘要翻译： 提供了一种特别适用于阀座制造的铁基烧结合金，具有优异的耐磨性并能够被切割。 该合金是通过压实和烧结工艺特别结合雾化的预合金粉末，铁粉，镍粉和石墨粉末而制成的，并且具有由所述雾化的预合金硬质合金粉末形成的珠光体和球状硬质合金相的组织 均匀地分散在所述硬质合金相周围的所述珠光体和马氏体中。
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