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1. 发明授权

US06827757B2 Magnetite-iron based composite powder, magnetite-iron based powder mixture, method for producing the same, method for remedying polluted soil, water or gases and electromagnetic wave absorber 失效
公开(公告)号：US06827757B2
公开(公告)日：2004-12-07
申请号：US10157604
申请日：2002-05-29
申请人： Yukiko Ozaki , Satoshi Uenosono , Hiroki Nakamaru , Yukiko Nakamura , Shigeaki Takajo , Shigeru Unami , Shingo Saito
发明人： Yukiko Ozaki , Satoshi Uenosono , Hiroki Nakamaru , Yukiko Nakamura , Shigeaki Takajo , Shigeru Unami , Shingo Saito
IPC分类号： B22F100
CPC分类号： B82Y30/00 , C01G23/003 , C01G49/009 , C01G49/06 , C01G49/08 , C01G51/006 , C01G53/00 , C01G53/006 , C01P2002/52 , C01P2002/54 , C01P2002/74 , C01P2004/45 , C01P2004/61 , C01P2004/62 , C01P2004/64 , C01P2006/10 , C01P2006/42 , C01P2006/60 , C01P2006/80
摘要： A magnetite-iron based composite powder includes magnetite with a ratio of X-ray diffraction intensity to that of &agr;-Fe of about 0.001 to about 50 and has an average primary particle size of about 0.1 to about 10 &mgr;m. The composite powder can highly dehalogenate organic halogen compounds and exhibits satisfactory absorption power of high frequency electromagnetic waves after molding. An ultrafine nonferrous inorganic compound powder may adhere to the surface of the composite powder, or at least the composite powder may adhere to the surfaces of small particles of a nonferrous inorganic compound to thereby yield a composite powder composition. The composite powder can be produced by partial reduction of a material powder containing a hematite based powder or by complete reduction and subsequent partial oxidation of the material powder.

2. 发明授权

US06322639B1 Magnetic steel sheet having excellent magnetic properties and method of producing the same 失效
标题翻译：磁性优异的磁钢板及其制造方法
公开(公告)号：US06322639B1
公开(公告)日：2001-11-27
申请号：US09462296
申请日：2000-01-04
申请人： Akihiro Matsuzaki , Osamu Kondo , Takako Yamashita , Shigeaki Takajo
发明人： Akihiro Matsuzaki , Osamu Kondo , Takako Yamashita , Shigeaki Takajo
IPC分类号： H01F112
CPC分类号： C22C38/02 , C21D8/1222 , C21D8/1233 , C21D8/1272 , C22C38/06
摘要： A magnetic steel sheet used for an alternating current core, and having excellent magnetic properties in both a rolling direction, and the direction perpendicular thereto, and a method of producing the magnetic steel sheet. The magnetic steel sheet in a recrystallized cold-rolled condition is characterized in that the intensity ratio of {100} orientation to random orientation is 2.0 or more, the intensity ratio of {011} orientation to random orientation thereof is 2.0 to 10.0, and the intensity ratio of //ND orientation to random orientation is preferably 2.0 or less. The method of producing a magnetic steel sheet includes hot-rolling a silicon steel slab so that the intensity ratio of (015)[100] orientation to random orientation of the recrystallized hot-rolled sheet is 3.0 or more.
摘要翻译：一种用于交流磁芯的磁性钢板，并且在轧制方向和与其垂直的方向上具有优异的磁性能，以及制造该电磁钢板的方法。再结晶冷轧条件下的电磁钢板的特征在于{100} <001>取向与随机取向的强度比为2.0以上，{011} <100>取向与其随机取向的强度比为 2.0至10.0，并且<001> // ND取向与随机取向的强度比优选为2.0以下。制造电磁钢板的方法包括将硅钢板热轧，使得再结晶热轧板的（015）[100]取向与随机取向的强度比为3.0以上。

3. 发明授权

US4964907A Sintered bodies and production process thereof 失效
标题翻译：烧结体及其制造方法
公开(公告)号：US4964907A
公开(公告)日：1990-10-23
申请号：US393765
申请日：1989-08-14
申请人： Yoshisato Kiyota , Junichi Ohta , Hiroshi Ohtsubo , Shigeaki Takajo
发明人： Yoshisato Kiyota , Junichi Ohta , Hiroshi Ohtsubo , Shigeaki Takajo
IPC分类号： B22F3/10 , B22F3/22 , H01F1/22
CPC分类号： B22F3/225 , B22F3/101 , B22F3/22 , H01F1/22 , A61F2002/30968 , B22F2998/00
摘要： A process is provided for the production of a sintered body. The process includes the following consecutive steps: (i) mixing and kneading one or more metal powders and/or one or more alloy powder with a binder into a compound, said metal and alloy powders having an average particle size not greater than 30 .mu.m, (ii) injection-molding the compound into a green body; (iii) debinding the green body to form a debound body; and (iv) subjecting the debound body to first-stage sintering at 1,050.degree.-1,250.degree. C. in a reducing or reduced-pressure atmosphere and then to second-stage sintering at a temperature in a range of 1,100.degree.-1,400.degree. C. which is higher than that of the first-stage sintering. This process can provide sintered Ti bodies and sintered magnetic bodies of the Fe-Si type, which have a density ratio of at least 95%.

4. 发明授权

US06248185B1 Electromagnetic steel sheet having excellent magnetic properties and production method thereof 有权
标题翻译：磁性优异的电磁钢板及其制造方法
公开(公告)号：US06248185B1
公开(公告)日：2001-06-19
申请号：US09134305
申请日：1998-08-14
申请人： Osamu Kondo , Akihiro Matsuzaki , Shigeaki Takajo
发明人： Osamu Kondo , Akihiro Matsuzaki , Shigeaki Takajo
IPC分类号： H01F116
CPC分类号： C21D8/1222 , H01F1/16
摘要： Electromagnetic steel sheet having excellent magnetic properties and a texture gratly integrated in the {100} orientation, and an uncomplicated and low cost production method; with about a 15 &mgr;&OHgr;·cm or more specific resistivity, about a 2.0 or more {100} integration degree /{111} integration degree and about a 10 &mgr;m to 500 &mgr;m grain diameter; when about 0.1 to 3.5% by weight of Si is present, the {100} integration degree is about 10 or more; when about 0.2 to 1.2% by weight of P is present, the {100} integration degree is about 3 or more; by applying a large reduction ratio to a steel slab in the vicinity of the final stage of hot rolling, with the hot rolling finishing temperature controlled at about 750 to 1150° C., hot rolled steel having a texture highly integrated in the {100} orientation is economically produced.
摘要翻译：具有优良的磁性能和结合在{100} <001>取向的结构的电磁钢板，以及不复杂和低成本的生产方法; 具有大约15μmOMEGA.cm或更高的电阻率，约2.0或更多{100} <001>积分度/ {111} 积分度和约10μm至500μm的粒径; 当存在约0.1至3.5重量％的Si时，{100} <001>整合度为约10或更大; 当存在约0.2-1.2重量％的P时，{100} <001>整合度为约3或更大; 通过对热轧最后阶段附近的钢坯施加大的压下率，在热轧精轧温度控制在约750〜1150℃的条件下，具有高度集成在{100} <001>方向经济地生产。

5. 发明授权

US4954171A Composite alloy steel powder and sintered alloy steel 失效
标题翻译：复合合金钢粉末和烧结合金钢
公开(公告)号：US4954171A
公开(公告)日：1990-09-04
申请号：US381652
申请日：1989-07-14
申请人： Shigeaki Takajo , Osamu Furukimi , Kuniaki Ogura , Keiichi Maruta , Teruyoshi Abe , Ichio Sakurada
发明人： Shigeaki Takajo , Osamu Furukimi , Kuniaki Ogura , Keiichi Maruta , Teruyoshi Abe , Ichio Sakurada
IPC分类号： C22C33/02
CPC分类号： C22C33/0264 , C22C33/0207 , C22C33/0257 , Y10T428/12181
摘要： Provided herein are high-strength high-toughness sintered alloy steel and composite alloy steel powder useful for the production thereof. The sintered alloy steel contains, as the alloy components in the final product, Ni, Mo, and/or W, and C, if necessary, said alloy being composed of 0.50-3.50 wt % of Ni, 0.65-3.50 wt % of Mo+1/2W, (and 0.3-0.8 wt % of C, if necessary), and the remainder of Fe and inevitable impurities, and has a density higher than 7.0 g/cm.sup.3 and a tensile strength higher than 130 kgf/mm.sup.2 after quenching and tempering. The composite alloy steel powder is composed of iron powder particles and powdery alloy components attached by diffusion to part of the surface of the iron powder particles, with the content of Ni and the content of Mo+1/2W in the steel powder of particle diameter smaller than 45 .infin.m being in the range of 2.0-4.2 times the average content in the entire steel powder. The sintered alloy steel has high strength and high toughness despites its comparatively low alloy composition and can be produced without any special equipment. The heat-treated sintered steel meets the requirements for automotive parts and the like.
摘要翻译： PCT No.PCT / JP88 / 01007 Sec。 371日期：1989年7月14日 102（e）日期1989年7月14日PCT提交1988年9月30日PCT公布。公开号WO89 / 02802 日本1989年4月6日。这里提出了用于制造高强度高韧性烧结合金钢和复合合金钢粉末。烧结合金钢作为最终产品中的合金成分含有Ni，Mo和/或W和C，如果需要，所述合金由0.50-3.50wt％的Ni，0.65-3.50wt％的Mo + 1 / 2W，（如果需要，为0.3〜0.8重量％的C），余量为Fe和不可避免的杂质，并且在淬火后具有高于7.0g / cm 3的密度和高于130kgf / mm 2的拉伸强度并回火。复合合金钢粉末由铁粉颗粒和粉末状合金组分组成，通过扩散到铁粉颗粒表面的一部分，其中Ni含量和Mo + 1 / 2W含量在钢粉中的粒径小于45的INFINITY m在整个钢粉末的平均含量的2.0-4.2倍的范围内。烧结合金钢具有较高的强度和高韧性，可以使其相对低的合金组成不受任何特殊的设备制造。热处理烧结钢满足汽车部件等的要求。

6. 发明授权

US4824734A Tin-containing iron base powder and process for making 失效
标题翻译：含锡铁粉及其制造工艺
公开(公告)号：US4824734A
公开(公告)日：1989-04-25
申请号：US70144
申请日：1987-07-02
申请人： Shigeaki Takajo
发明人： Shigeaki Takajo
IPC分类号： B22F1/00 , B22F1/02 , C22C33/02 , H01F1/22
CPC分类号： B22F1/025 , B22F1/0096 , C22C33/0207 , H01F1/22 , Y10T428/12181
摘要： The invention provides a tin-containing iron base powder comprising iron base particulates each having tin-rich portions on the surface in which at least a part of the tin forms a compound with iron, wherein the total tin content ranges from 1 to 20% by weight of the powder. The invention also provides a process for making such a tin-containing iron base powder by mixing an iron base powder with a powder tin compound capable of generating metallic tin upon thermal decomposition, and heating the mixture to a temperature of 450.degree. to 700.degree. C. in a reducing or non-oxidizing atmosphere. Using this tin-containing iron base powder as a sintering material, there can be obtained sintered products having a high density and excellent magnetic properties.
摘要翻译： PCT No.PCT / JP84 / 00278 Sec。 371日期1985年2月1日 102（e）1985年2月1日PCT申请日1984年6月1日PCT公布。出版物WO84 / 0471200 日期为1984年12月6日。本发明提供一种含铁铁基粉末，其包含在表面上具有富铁部分的铁基颗粒，其中至少一部分锡与铁形成化合物，其中总锡含量的范围为粉末的1至20重量％。本发明还提供了一种通过将铁基粉末与能够在热分解时产生金属锡的粉末锡化合物混合来制备这种含锡铁基粉末的方法，并将该混合物加热到450℃至700℃ 在还原或非氧化气氛中。使用该含锡铁基粉末作为烧结材料，可以获得具有高密度和优异磁性的烧结产品。

7. 发明授权

US4643765A Tin-containing ferrous composite powder and method of producing same and tin-containing sintered magnetic material 失效
标题翻译：含锡铁粉复合粉及其制造方法和含锡烧结磁性材料
公开(公告)号：US4643765A
公开(公告)日：1987-02-17
申请号：US743480
申请日：1985-06-11
申请人： Shigeaki Takajo
发明人： Shigeaki Takajo
IPC分类号： B22F1/00 , B22F1/02 , C22C33/02 , H01F1/22 , C22C33/00
CPC分类号： B22F1/025 , C22C33/0207 , H01F1/22 , Y10T428/12181
摘要： As the raw material of a ferrous sintered alloy, a ferrous composite powder excellent in both compressibility and distribution of alloying elements is obtained by mixing an iron powder or a Sn-free low-alloy iron powder with at least one secondary powder comprising at least one of C, Co, Cr, Cu, Mn, Mo, Ni, P and Si and another powder comprising Sn and heating the powder mixture in a nonoxidizing atmosphere at 250.degree.-900.degree. C. to result in that the secondary powder(s) is at least partially bonded to the iron particles with Sn as a sort of cementing medium. In the powder mixture the content of Sn is 0.1-20 wt %, and the weight ratio of the secondary powder(s) to Sn is not greater than 50:1. Also disclosed is a ferrous sintered magnetic material high in magnetic flux density and small in iron loss, which contains 1-12 wt % of Si, 0.05-7 wt % of Sn and, optionally, 0.05-2 wt % of P and in which Sn concentrates on the surfaces of iron particles.
摘要翻译：作为铁类烧结合金的原料，通过将铁粉或无Sn低合金铁粉与至少一种二次粉末混合，得到合金元素的压缩性和分布均优异的铁质复合粉末，的C，Co，Cr，Cu，Mn，Mo，Ni，P和Si以及另一种包含Sn的粉末，并在250-900℃的非氧化气氛中加热粉末混合物，至少部分地以Sn作为一种固井介质粘结到铁颗粒上。在粉末混合物中，Sn的含量为0.1-20重量％，二次粉末与Sn的重量比不大于50:1。还公开了磁通密度高，铁损小的铁类烧结磁性材料，其含有1-12重量％的Si，0.05-7重量％的Sn和任选的0.05-2重量％的P，其中 Sn集中在铁颗粒表面。

8. 发明授权

US06207103B1 Fe-Cr-Si steel sheets having excellent corrosion resistance and method for manufacturing the same 失效
标题翻译：具有优异耐腐蚀性的Fe-Cr-Si钢板及其制造方法
公开(公告)号：US06207103B1
公开(公告)日：2001-03-27
申请号：US09123969
申请日：1998-07-29
申请人： Shigeaki Takajo , Takako Yamashita , Akihiro Matsuzaki , Osamu Kondo
发明人： Shigeaki Takajo , Takako Yamashita , Akihiro Matsuzaki , Osamu Kondo
IPC分类号： C22C3818
CPC分类号： C22C38/34
摘要： Fe—Cr—Si steel sheet having an excellent corrosion resistance and high toughness and method for manufacturing the same; the amount of Cr is about 10-30 wt %, the total amount of C and N is not more than about 100 ppm and the remainder consists of Fe and incidental impurities; when a cast piece of this steel is subjected to hot rolling to roll into a thickness of not more than about 3 mm, the hot rolled sheet can be subjected to cold rolling or to warm rolling without annealing.
摘要翻译：具有优异的耐腐蚀性和高韧性的Fe-Cr-Si钢板及其制造方法; Cr的量为约10-30重量％，C和N的总量不大于约100ppm，其余由Fe和附带的杂质组成; 当将该钢的铸件进行热轧轧制成不大于3mm的厚度时，可以对热轧板进行冷轧或不进行退火的温轧。

9. 发明授权

US5308702A Iron-based powder composition for use in powder metallurgy, process for its production and process for producing iron-base sintered material 失效
标题翻译：用于粉末冶金的铁基粉末组合物，其生产方法和生产铁基烧结材料的方法
公开(公告)号：US5308702A
公开(公告)日：1994-05-03
申请号：US827343
申请日：1992-01-29
申请人： Osamu Furukimi , Koji Yano , Shigeaki Takajo
发明人： Osamu Furukimi , Koji Yano , Shigeaki Takajo
IPC分类号： B22F1/02 , C22C33/02 , B22F1/00 , B32B15/02
CPC分类号： C22C33/0207 , Y10T428/12181 , Y10T428/2991 , Y10T428/2998
摘要： Improved iron-base powder composition for use in powder metallurgy comprising an iron-base powder to the surfaces of the particles of which either an Fe-Ni powder alloy containing 5-70 wt % Ni or an Fe-Mo alloy powder containing 20-70 wt % Mo or both alloy powders is adhered means of a binder or binders. This iron-base powder composition can be obtained by a process in which either an Fe-Ni alloy powder containing 5-70 wt % Ni or an Fe-Mo alloy powder containing 20-70 wt % Mo or both alloy powders is adhered by thermally melting a binder. The thus obtained iron-base powder composition can be shaped and sintered to produce an iron-base sintered material. The iron-base powder composition is suitable for use in the powder metallurgical manufacture of iron-base sintered parts that require high density, high strength, toughness, wear resistance and good dimensional change stability.
摘要翻译：改进的用于粉末冶金的铁基粉末组合物，其包含铁基粉末到颗粒表面，其中含有5-70重量％Ni的Fe-Ni粉末合金或含有20-70重量％的Fe-Mo合金粉末 wt％Mo或两种合金粉末是粘合剂或粘合剂的粘合方式。该铁基粉末组合物可以通过以下方法获得：将含有5-70重量％Ni的Fe-Ni合金粉末或含有20-70重量％Mo的Fe-Mo合金粉末或两种合金粉末通过热粘合熔化粘合剂由此获得的铁基粉末组合物可以成形并烧结以制备铁基烧结材料。铁基粉末组合物适用于需要高密度，高强度，韧性，耐磨性和良好的尺寸变化稳定性的铁基烧结零件的粉末冶金制造。

10. 发明授权

US4946499A Method of preparing iron base powder mixture for pm 失效
标题翻译：制备铁基粉末混合物的方法
公开(公告)号：US4946499A
公开(公告)日：1990-08-07
申请号：US252066
申请日：1988-09-29
申请人： Ichio Sakuranda , Ritsuo Okabe , Takao Omura , Yoshisato Kiyota , Shigeaki Takajo
发明人： Ichio Sakuranda , Ritsuo Okabe , Takao Omura , Yoshisato Kiyota , Shigeaki Takajo
IPC分类号： B22F1/00 , B22F3/02 , C22C33/02 , C22C38/00 , C22C38/16
CPC分类号： B22F1/0077 , B22F1/0059 , C22C33/0207 , B22F2001/0066 , B22F2998/00
摘要： An iron base powder mixture for powder metallurgy, comprising an iron based powder and an alloying powder and/or a powder for improving machinability, wherein the alloying powder and/or the powder for improving machinability are adhered to the surface of the ferrous powder by means of a melted-together binder composed of an oil and a metal soap or wax.

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