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    Alloy steel powder for powder metallurgy
    1.
    发明申请
    Alloy steel powder for powder metallurgy 有权
    粉末冶金用合金钢粉末

    公开(公告)号：US20050039576A1

    公开(公告)日：2005-02-24

    申请号：US10918887

    申请日：2004-08-16

    申请人： Shigeru Unami ,  Naomichi Nakamura ,  Satoshi Uenosono

    发明人： Shigeru Unami ,  Naomichi Nakamura ,  Satoshi Uenosono

    IPC分类号： C22C33/02 ,  C22C1/04

    CPC分类号： C22C33/0207 ,  B22F2999/00 ,  B22F1/0003 ,  B22F1/0096

    摘要： An alloy steel powder for powder metallurgy includes an iron-based powder containing about 0.5 mass percent or less of Mn as a prealloyed element and 0.2 to about 1.5 mass percent of Mo as a prealloyed element; and a Mo-containing alloy powder bonded on the surface of the iron-based powder by diffusion bonding. In the alloy steel powder for powder metallurgy, a Mo average content [MO]T (mass percent) satisfies formula 0.8≧[M]T—[Mo]P≧0.05, wherein the content [Mo]P is the above prealloyed Mo content (mass percent) in the iron-based powder.

    摘要翻译： 用于粉末冶金的合金钢粉末包括含有作为预合金元素的Mn的约0.5质量％或更少的铁基粉末和作为预合金元素的0.2至约1.5质量％的Mo; 和通过扩散接合结合在铁基粉末的表面上的含Mo合金粉末。 在用于粉末冶金的合金钢粉末中，Mo平均含量[MO] T（质量百分比）满足公式0.8> = [M] T [Mo] P> = 0.05，其中[Mo] P为上述预合金 铁基粉末中的Mo含量（质量百分比）。

    Iron-based sintered powder metal body, manufacturing method thereof and manufacturing method of iron-based sintered component with high strength and high density
    3.
    发明授权
    Iron-based sintered powder metal body, manufacturing method thereof and manufacturing method of iron-based sintered component with high strength and high density 有权
    铁基烧结粉末金属体及其制造方法以及高强度，高密度的铁基烧结体的制造方法

    公开(公告)号：US06514307B2

    公开(公告)日：2003-02-04

    申请号：US09934428

    申请日：2001-08-21

    申请人： Naomichi Nakamura ,  Satoshi Uenosono ,  Shigeru Unami ,  Masashi Fujinaga ,  Takashi Yoshimura ,  Mitsumasa Iijima ,  Shin Koizumi ,  Hiroyuki Anma ,  Yasuo Hatai

    发明人： Naomichi Nakamura ,  Satoshi Uenosono ,  Shigeru Unami ,  Masashi Fujinaga ,  Takashi Yoshimura ,  Mitsumasa Iijima ,  Shin Koizumi ,  Hiroyuki Anma ,  Yasuo Hatai

    IPC分类号： C22C3302

    CPC分类号： C22C33/0264 ,  B22F3/1007 ,  B22F2998/10 ,  B22F2999/00 ,  C22C33/02 ,  B22F3/02 ,  B22F3/10 ,  C22C33/0207 ,  B22F1/0096

    摘要： An sintered iron-based powder metal body with outstandingly lower re-compacting load and having a high density and a method of manufacturing an iron-based sintered component with fewer pores of a sharp shape and having high strength and high density, the method comprising mixing, an iron-based metal powder containing at most about 0.05% of carbon, at most about 0.3% of oxygen, at most about 0.010% of nitrogen, with at least about 0.03% and at most about 0.5% of graphite powder and a lubricant, preliminarily compacting the mixture into a preform, the density of which is about 7.3 Mg/m3 or more, and preliminarily sintering the preform in a non-oxidizing atmosphere in which a partial pressure of nitrogen is about 30 kPa or less at a temperature of about 1000° C. or higher and about 1300° C. or lower, thereby forming a sintered iron-based powder metal body with outstandingly lower re-compacting load and having high deformability, the density of which is about 7.3 Mg/m3 or more and which contains at least about 0.10% and at most about 0.50 of carbon, at most about 0.010% of oxygen and at most about 0.010% of nitrogen, and which comprises at most about 0.02% of free carbon, and, further applying re-compaction and re-sintering and/or heat treatment thereby forming a sintered component, as well as the method alternatively comprising applying preliminary sintering in an atmosphere with no restriction of the nitrogen partial pressure and then annealing instead of the sintering step, thereby obtaining a sintered iron-based powder metal body with the nitrogen content of at most about 0.010%.

    摘要翻译： 一种烧结铁基粉末金属体，具有显着降低的再压实载荷并具有高密度，并且制造具有较少的尖锐形状的孔并具有高强度和高密度的铁基烧结组分的方法，该方法包括混合 ，含有最多约0.05％的碳，至多约0.3％的氧，至多约0.010％的氮，至少约0.03％和至多约0.5％的石墨粉末和润滑剂的铁基金属粉末， 将混合物预先压实成预制件，其密度为约7.3Mg / m 3以上，并且在约10分钟的温度下在氮气分压为约30kPa以下的非氧化性气氛中预先烧结预成型体 1000℃以上约1300℃以下，从而形成烧结的铁基粉末金属体，具有显着降低的再压缩载荷，并具有高变形能力，其密度为约7.3Mg / m 3以上， 其中 至少约0.10％，至多约0.50碳，至多约0.010％的氧和至多约0.010％的氮，并且其包含至多约0.02％的游离碳，并且进一步应用再压实和 再烧结和/或热处理，从而形成烧结组分，以及所述方法或者包括在不限制氮分压的气氛中进行初步烧结，然后退火而不是烧结步骤，由此获得烧结的铁 - 含氮量最多为0.010％的粉末金属体。

    Alloy steel powder for powder metallurgy
    5.
    发明授权
    Alloy steel powder for powder metallurgy 有权
    粉末冶金用合金钢粉末

    公开(公告)号：US07347884B2

    公开(公告)日：2008-03-25

    申请号：US10918887

    申请日：2004-08-16

    申请人： Shigeru Unami ,  Naomichi Nakamura ,  Satoshi Uenosono

    发明人： Shigeru Unami ,  Naomichi Nakamura ,  Satoshi Uenosono

    IPC分类号： B22F3/00 ,  B22F1/00

    CPC分类号： C22C33/0207 ,  B22F2999/00 ,  B22F1/0003 ,  B22F1/0096

    摘要： An alloy steel powder for powder metallurgy includes an iron-based powder containing about 0.5 mass percent or less of Mn as a prealloyed element and 0.2 to about 1.5 mass percent of Mo as a prealloyed element; and a Mo-containing alloy powder bonded on the surface of the iron-based powder by diffusion bonding. In the alloy steel powder for powder metallurgy, a Mo average content [Mo]T (mass percent) satisfies formula 0.8≧[Mo]T−[Mo]P≧0.05, wherein the content [Mo]P is the above prealloyed Mo content (mass percent) in the iron-based powder.

    摘要翻译： 用于粉末冶金的合金钢粉末包括含有作为预合金元素的Mn的约0.5质量％或更少的铁基粉末和作为预合金元素的0.2至约1.5质量％的Mo; 和通过扩散接合结合在铁基粉末的表面上的含Mo合金粉末。 在用于粉末冶金的合金钢粉末中，Mo平均含量[Mo]≤T（质量百分比）满足公式0.8> = [Mo] T P = 0.05，其中，[Mo] P

    是铁基粉末中上述预合金化的Mo含量（质量％）。

    Alloyed steel powder for powder metallurgy
    6.
    发明授权
    Alloyed steel powder for powder metallurgy 有权
    粉末冶金用合金钢粉末

    公开(公告)号：US06758882B2

    公开(公告)日：2004-07-06

    申请号：US10255280

    申请日：2002-09-26

    申请人： Naomichi Nakamura ,  Satoshi Uenosono ,  Shigeru Unami ,  Masashi Fujinaga

    发明人： Naomichi Nakamura ,  Satoshi Uenosono ,  Shigeru Unami ,  Masashi Fujinaga

    IPC分类号： B22F100

    CPC分类号： C22C33/0207 ,  B22F2999/00 ,  B22F1/0003 ,  B22F1/0096

    摘要： A Mo source powder is added to and mixed with an iron-based powder containing 1.0% by mass or less of prealloyed Mn to yield a powder mixture containing 0.2 to 10.0% by mass of Mo, the resulting powder mixture is subjected to heat treatment in a reducing atmosphere to thereby yield an alloyed steel powder containing Mo as a powder partially diffused and bonded to a surface of the iron-based powder particles. The prepared alloyed steel powder for powder metallurgy has satisfactory compactability. The use of this alloyed steel powder can produce a sintered powder metal body (an intermediate material after compaction and preliminary sintering in re-compaction of sintered powder materials process) for highly strong sintered member.

    摘要翻译： 向含有1.0质量％以下的预合金Mn的铁基粉末中添加Mo源粉末，得到含有0.2〜10.0质量％的Mo的粉末混合物，将得到的粉末混合物进行热处理 还原气氛，从而得到含有Mo的合金化钢粉，其部分扩散并结合到铁基粉末颗粒的表面。 制备的粉末冶金合金钢粉末具有令人满意的压实性。 使用该合金钢粉末可以制造高强度烧结体的烧结粉末金属体（压实后的中间材料，烧结粉末材料的再压制的预烧结）。

    Alloy steel powders, sintered bodies and method
    7.
    发明授权
    Alloy steel powders, sintered bodies and method 失效
    合金钢粉末，烧结体及方法

    公开(公告)号：US5605559A

    公开(公告)日：1997-02-25

    申请号：US392120

    申请日：1995-02-22

    申请人： Shigeru Unami ,  Satoshi Uenosono

    发明人： Shigeru Unami ,  Satoshi Uenosono

    IPC分类号： C22C33/02 ,  C22C38/22 ,  C22C38/24 ,  C22C38/46

    CPC分类号： C22C33/0264 ,  C22C33/02 ,  C22C38/22 ,  C22C38/24 ,  B22F2009/0824 ,  B22F2998/10 ,  B22F2999/00

    摘要： Alloy steel powders capable of obtaining high strength in a sintered state and having excellent compacting compressibility and methods of manufacturing a sintered body. The alloy steel powder comprises, by wt %, about 0.5-2% of Cr, not greater than about 0.08% of Mn, about 0.1-0.6% of Mo, about 0.05-0.5% of V, not greater than about 0.015 of S, not greater than about 0.2% of O, and the balance being Fe and incidental impurities. The alloy steel powder is compacted and sintered at a temperature of about 1100.degree.-1300.degree. C. and then cooled at a cooling rate no higher than about 1.degree. C./s in a temperature range of from about 800.degree. C. to 400.degree. C. The alloy steel powder can contain Nb and/or Ti and one or more of Co, W and B. Additionally, Ni powder and/or Cu powder may be adhered and dispersed onto the surface of the alloy steel powder.

    摘要翻译： 能够在烧结状态下获得高强度并具有优异的压实压缩性的合金钢粉末和制造烧结体的方法。 合金钢粉末以重量％计含有约0.5-2％的Cr，不大于约0.08％的Mn，约0.1-0.6％的Mo，约0.05-0.5％的V，不大于约0.015的S ，不大于约0.2％的O，余量为Fe和杂质。 合金钢粉末在约1100〜-1300℃的温度下压实烧结，然后在约800℃至400℃的温度范围内以不高于约1℃/ s的冷却速率冷却 ℃。合金钢粉末可以含有Nb和/或Ti以及一种或多种Co，W和B.另外，Ni粉末和/或Cu粉末可以粘附并分散在合金钢粉末的表面上。

    Metallic powder molding material and its re-compression molded body and sintered body obtained from the re-compression molded body and production methods thereof
    10.
    发明授权
    Metallic powder molding material and its re-compression molded body and sintered body obtained from the re-compression molded body and production methods thereof 有权
    金属粉末成型材料及其再压缩成型体和由再压缩成型体得到的烧结体及其制造方法

    公开(公告)号：US06503443B1

    公开(公告)日：2003-01-07

    申请号：US09647862

    申请日：2000-10-06

    申请人： Takashi Yoshimura ,  Hiroyuki Amma ,  Masashi Fujinaga ,  Mitsumasa Iijima ,  Yasuo Hatai ,  Takayuki Matsumoto ,  Satoshi Uenosono ,  Shigeru Unami

    发明人： Takashi Yoshimura ,  Hiroyuki Amma ,  Masashi Fujinaga ,  Mitsumasa Iijima ,  Yasuo Hatai ,  Takayuki Matsumoto ,  Satoshi Uenosono ,  Shigeru Unami

    IPC分类号： B22F316

    CPC分类号： C22C33/02 ,  B22F2998/00 ,  B22F2998/10 ,  B22F3/16 ,  C22C33/0228 ,  B22F3/02 ,  B22F3/10 ,  B22F3/20

    摘要： In a preliminary molding step 1, a metallic powder mixture 7 obtained by blending an iron-based metal powder 7a with graphite 7b such that the graphite is present in an amount of preferably not less than 0.1% by weight, more preferably not less than 0.3% by weight, is compacted into a preform 8 having a density of not less than 7.3 g/cm3. In a provisional sintering step 2, the preform 8 is provisionally sintered at a predetermined temperature to form a metallic powder-molded body 9 having a structure in which the graphite remains along a grain boundary of the metal powder. In a re-compaction step 3, the metallic powder-molded body 9 is re-compacted into a re-compacted body 10. In a re-sintering step 4, the re-compacted body 10 is re-sintered to obtain a sintered body 11. In a heat treatment step 5, the sintered body 11 is heat-treated to obtain a heat-treated sintered body 11. Accordingly, in accordance with the present invention, there are provided a re-compacted body produced from a metallic powder-molded body having an excellent deformability which is suitably applied to the production of machine parts exhibiting high mechanical properties due to the use of sintered metal, and a sintered body produced from the re-compacted body as well as a process for the production thereof.

    摘要翻译： 在预成型步骤1中，通过将铁基金属粉末7a与石墨7b共混而得到的金属粉末混合物7，使得石墨的存在量优选为0.1重量％以上，更优选为0.3以上 重量％被压实成密度不小于7.3g / cm 3的预成型体8。 在预烧结步骤2中，将预成型体8在规定温度下进行预烧结，形成金属粉末成形体9，该金属粉末成型体9具有沿着金属粉末的晶界留下的石墨的结构。 在再压制步骤3中，将金属粉末成型体9再压制成再压制体10.在再烧结步骤4中，重新烧结再压制体10以获得烧结体 在热处理工序5中，对烧结体11进行热处理，得到热处理烧结体11.因此，根据本发明，提供了一种由金属粉末 - 具有优异的变形性的成型体，其适用于由于使用烧结金属而显示出高机械性能的机械部件的制造，以及由再压制体制造的烧结体及其制造方法。