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

IPC分类号： C22C33/02 ,  C22C38/00 ,  C22C38/56 ,  F02F7/00

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.

公开(公告)号：US5158601A

公开(公告)日：1992-10-27

申请号：US831925

申请日：1992-02-06

申请人： Akira Fujiki ,  Kenzo Morita ,  Akiyoshi Ishibashi ,  Kazutoshi Takemura

发明人： Akira Fujiki ,  Kenzo Morita ,  Akiyoshi Ishibashi ,  Kazutoshi Takemura

IPC分类号： B22F1/02 ,  C22C33/02 ,  C22C38/00 ,  C22C38/16

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.

公开(公告)号：US5859376A

公开(公告)日：1999-01-12

申请号：US787232

申请日：1997-01-22

申请人： Akiyoshi Ishibashi ,  Tomonori Miyazawa ,  Kunio Maki ,  Akira Fujiki

发明人： Akiyoshi Ishibashi ,  Tomonori Miyazawa ,  Kunio Maki ,  Akira Fujiki

IPC分类号： C22C33/02 ,  C22C38/00 ,  C22C38/52 ,  B22F3/12

CPC分类号： C22C33/0292 ,  C22C33/0207 ,  C22C33/0257

摘要： An iron base sintered alloy with dispersed hard particles is provided which comprises by weight 3 to 15% nickel (Ni), 0.5 to 5% chromium (Cr), 0.5 to 2.0% carbon (C), the remainder iron (Fe) and unavoidable impurities. At least a part of nickel (Ni), molybdenum (Mo) and chromium (Cr) is contained in solid solution of an iron base matrix. At least a part of molybdenum (Mo) and chromium (Cr) is dispersed within the iron base matrix to form fine carbides or intermetallic compounds thereof. Uniformly dispersed within the iron base matrix are hard particles of 3 to 20% contain 50 to 57% chromium (Cr), 18 to 22% molybdenum (Mo), 8 to 12% cobalt (Co), 0.1 to 1.4% carbon (C), 0.8 to 1.3% silicon (Si) and the remainder iron (Fe) to strengthen the dispersion and remarkably improve wear resistance.

摘要翻译： 提供了一种具有分散的硬质颗粒的铁基烧结合金，其包含重量为3至15％的镍（Ni），0.5至5％的铬（Cr），0.5至2.0％的碳（C），剩余的铁（Fe）和不可避免的 杂质。 在铁基基质的固溶体中含有镍（Ni），钼（Mo）和铬（Cr）的至少一部分。 钼（Mo）和铬（Cr）的至少一部分分散在铁基质基质中以形成细小的碳化物或金属间化合物。 均匀分散在铁基基质中，3〜20％的硬质粒子含有50〜57％的铬（Cr），18〜22％的钼（Mo），8〜12％的钴（Co），0.1〜1.4％的碳（C ），0.8〜1.3％的硅（Si），余量为铁（Fe），以增强分散性，显着提高耐磨性。

公开(公告)号：US07241327B2

公开(公告)日：2007-07-10

申请号：US11126568

申请日：2005-05-10

申请人： Hiroji Henmi ,  Akiyoshi Ishibashi

发明人： Hiroji Henmi ,  Akiyoshi Ishibashi

IPC分类号： B22F3/00

CPC分类号： C22C38/44 ,  C22C32/0089 ,  C22C33/0207 ,  C22C33/0228 ,  C22C38/02 ,  C22C38/46 ,  C22C38/48

摘要： An iron-based sintered alloy having improved thermal and mechanical strength is provided. The iron-based sintered alloy with dispersed hard particles comprises: a matrix comprising, by weight, 0.4 to 2% silicon (Si), 2 to 12% nickel (Ni), 3 to 12% molybdenum (Mo), 0.5 to 5% chromium (Cr), 0.6 to 4% vanadium (V), 0.1 to 3% niobium (Nb), 0.5 to 2% carbon (C), and the reminder of iron (Fe); and hard particles comprising 60 to 70% molybdenum (Mo), 0.3 to 1% boron (B), 0.1% or less carbon (C), and the reminder of iron (Fe). The hard particles are dispersed in the matrix in an amount in the range of 3 to 20% based on the entire alloy. They are sintered to produce the iron-based sintered alloy. Addition of boron into the ferromolybdenum hard particles enhances the wettability of the ferromolybdenum hard particles to prevent the hard particles from falling off the matrix. Thus, the adhesive property between the matrix and the hard particles is improved, thereby enhancing the thermal and mechanical strength of the iron-based sintered alloy.

摘要翻译： 提供了具有改善的热和机械强度的铁基烧结合金。 具有分散的硬质颗粒的铁基烧结合金包括：基体，其包含重量比为0.4〜2％的硅（Si），2〜12％的镍（Ni），3〜12％的钼（Mo），0.5〜5％ 铬（Cr），0.6〜4％的钒（V），0.1〜3％的铌（Nb），0.5〜2％的碳（C）和铁（Fe）的提醒。 以及包含60〜70％的钼（Mo），0.3〜1％的硼（B），0.1％以下的碳（C）的硬质粒子和铁（Fe）的提醒。 基于整个合金，硬质粒子以3〜20％的范围分散在基质中。 将它们烧结以生产铁基烧结合金。 向铁钼硬质粒子中添加硼增强了钼硬质粒子的润湿性，防止了硬质粒子从基体上脱落。 因此，提高了基体和硬质粒子之间的粘合性，从而提高了铁基烧结合金的热和机械强度。

公开(公告)号：US20050252338A1

公开(公告)日：2005-11-17

申请号：US11126568

申请日：2005-05-10

申请人： Hiroji Henmi ,  Akiyoshi Ishibashi

发明人： Hiroji Henmi ,  Akiyoshi Ishibashi

IPC分类号： B22F3/12 ,  C22C29/00 ,  C22C32/00 ,  C22C33/02 ,  C22C38/00 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/56

CPC分类号： C22C38/44 ,  C22C32/0089 ,  C22C33/0207 ,  C22C33/0228 ,  C22C38/02 ,  C22C38/46 ,  C22C38/48

摘要： An iron-based sintered alloy having improved thermal and mechanical strength is provided. The iron-based sintered alloy with dispersed hard particles comprises: a matrix comprising, by weight, 0.4 to 2% silicon (Si), 2 to 12% nickel (Ni), 3 to 12% molybdenum (Mo), 0.5 to 5% chromium (Cr), 0.6 to 4% vanadium (V), 0.1 to 3% niobium (Nb), 0.5 to 2% carbon (C), and the reminder of iron (Fe); and hard particles comprising 60 to 70% molybdenum (Mo), 0.3 to 1% boron (B), 0.1% or less carbon (C), and the reminder of iron (Fe). The hard particles are dispersed in the matrix in an amount in the range of 3 to 20% based on the entire alloy. They are sintered to produce the iron-based sintered alloy. Addition of boron into the ferromolybdenum hard particles enhances the wettability of the ferromolybdenum hard particles to prevent the hard particles from falling off the matrix. Thus, the adhesive property between the matrix and the hard particles is improved, thereby enhancing the thermal and mechanical strength of the iron-based sintered alloy.

摘要翻译： 提供了具有改善的热和机械强度的铁基烧结合金。 具有分散的硬质颗粒的铁基烧结合金包括：基体，其包含重量比为0.4〜2％的硅（Si），2〜12％的镍（Ni），3〜12％的钼（Mo），0.5〜5％ 铬（Cr），0.6〜4％的钒（V），0.1〜3％的铌（Nb），0.5〜2％的碳（C）和铁（Fe）的提醒。 以及包含60〜70％的钼（Mo），0.3〜1％的硼（B），0.1％以下的碳（C）的硬质粒子和铁（Fe）的提醒。 基于整个合金，硬质粒子以3〜20％的范围分散在基质中。 将它们烧结以生产铁基烧结合金。 向铁钼硬质粒子中添加硼增强了钼硬质粒子的润湿性，防止了硬质粒子从基体上脱落。 因此，提高了基体和硬质粒子之间的粘合性，从而提高了铁基烧结合金的热和机械强度。

公开(公告)号：US06802883B2

公开(公告)日：2004-10-12

申请号：US10383870

申请日：2003-03-10

申请人： Hiroji Henmi ,  Akiyoshi Ishibashi

发明人： Hiroji Henmi ,  Akiyoshi Ishibashi

IPC分类号： C22C3302

CPC分类号： C22C33/0257 ,  B22F2998/10 ,  C22C33/0207 ,  B22F1/0059 ,  B22F3/02 ,  B22F3/10

摘要： An iron-based sintered alloy, which consists of from 0.5 to 5% of Ni, from 0.5 to 4% of Cr, from 0.5 to 2% of C, the balance being Fe and unavoidable impurities, and which has a micro-structure comprising an iron-based matrix containing Ni and a part of Cr as solutes and carbides containing the other part of Cr and dispersed in the matrix. The iron-based sintered alloy is appropriate for use as a valve seat of an internal combustion engine. Wear resistance is maintained at a moderate level while the additive amount of alloying elements is decreased to attain low cost.

摘要翻译： 一种铁基烧结合金，其由0.5％至5％的Ni，0.5至4％的Cr，0.5至2％的C，余量为Fe和不可避免的杂质组成，并且具有微结构，其包含 含有Ni和作为溶质的Cr的一部分的铁基，含有Cr的另一部分并分散在基体中的碳化物。 铁基烧结合金适用于内燃机的阀座。 耐磨性维持在中等水平，同时减少合金元素的添加量以获得低成本。