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1. 发明专利

JP2004270012A Method for producing iron-based sintered compact and compressiom molded product for sintering 有权
公开(公告)号：JP2004270012A
公开(公告)日：2004-09-30
申请号：JP2003065676
申请日：2003-03-11
申请人： Hitachi Unisia Automotive Ltd , Jfe Steel Kk , Jfeスチール株式会社 , 株式会社日立ユニシアオートモティブ
发明人： NAKAMURA NAOMICHI , UENOSONO SATOSHI , UNAMI SHIGERU , FUJINAGA MASASHI , YOSHIMURA TAKASHI , KOIZUMI SUSUMU , YASUMA HIROYUKI , YUKINAWA MAKOTO
IPC分类号： B22F3/10 , B22F3/17
摘要： PROBLEM TO BE SOLVED: To provide a method for producing a high-density iron-based sintered compact, wherein the degree of progress of finish sintering at a relatively low temperature is high while the reduction in manufacturing cost of the sintered compact, especially the prevention of cost increase due to press molding, is realized and to provide a compression molded product for sintering which is used in producing such an iron-based sintered compact.
SOLUTION: The method for producing an iron-based sintered compact comprises subjecting an iron-based metallic powder to powder compression molding and pre-sintering to give a preform and subjecting the preform to cold forging and finish sintering. In the method, the distortion quantity of the cold-forged, compression molded product is measured, and the sintering conditions are changed according to the results of the measurement. Desirably, the distortion of the compressed molding is determined from the half width of the X-ray diffraction line of the Fe(200) face of the compression molded product by nondestructive testing, especially X-ray diffractometry.
COPYRIGHT: (C)2004,JPO&NCIPI

2. 发明专利

JP2003253372A METHOD FOR MANUFACTURING HIGH DENSITY IRON-BASED FORGED PARTS 审中-公开
公开(公告)号：JP2003253372A
公开(公告)日：2003-09-10
申请号：JP2002054244
申请日：2002-02-28
申请人： JFE STEEL KK , HITACHI UNISIA AUTOMOTIVE LTD
发明人： NAKAMURA NAOMICHI , UNAMI SHIGERU , UENOSONO SATOSHI , FUJINAGA MASASHI , YOSHIMURA TAKASHI , IIJIMA MITSUMASA , KOIZUMI SUSUMU , YASUMA HIROYUKI
IPC分类号： B22F3/10 , B22F3/17 , C22C33/02 , C22C38/00
摘要： PROBLEM TO BE SOLVED: To provide a method for manufacturing iron-based forged parts with high density and high accuracy of dimension. SOLUTION: This manufacturing method comprises preliminarily compression molding an iron-based mixed powder containing an iron-based metal powder and a graphite powder into a compressed preform, presintering the compressed preform in a non-oxidizing atmosphere having a nitrogen partial pressure of 30 kPa or lower, at 950°C or higher but 1,300°C or lower, or further annealing it into a material to be formed, and subjecting it to full enclosed die forging or closed die forging. The density of the compressed preform is preferably less than 7.3 Mg/m 3 . COPYRIGHT: (C)2003,JPO

3. 发明专利

JP2003253304A MEMBER FOR MAGNETIC CORE AND ITS MANUFACTURING METHOD 审中-公开
公开(公告)号：JP2003253304A
公开(公告)日：2003-09-10
申请号：JP2002053852
申请日：2002-02-28
申请人： JFE STEEL KK , HITACHI UNISIA AUTOMOTIVE LTD
发明人： NAKAMURA NAOMICHI , UENOSONO SATOSHI , UNAMI SHIGERU , FUJINAGA MASASHI , YOSHIMURA TAKASHI , IIJIMA MITSUMASA , KOIZUMI HIROSHI , YASUMA HIROYUKI
IPC分类号： B22F3/00 , B22F3/24 , C22C38/00 , H01F1/22
摘要： PROBLEM TO BE SOLVED: To provide a member for a magnetic core, which is high in density, surface hardness, and magnetic flux density. SOLUTION: A mixed powder which is prepared by blending and mixing an iron-base powder with a specified amount of lubricant, or further a specified amount of graphite powder is preliminarily molded as a pre-molded body. The pre-molded body is subjected to sintering treatment at a temperature of ≥800°C, preferably >1,000°C, or further to annealing treatment at a temperature of 400-700°C to obtain a sintered compact. The sintered compact is subjected to cold-forging and then to heat-treatment at a temperature of ≤600°C, preferably ≥300°C and ≤600°C. COPYRIGHT: (C)2003,JPO

4. 发明专利

DE10308274A1 未知
公开(公告)号：DE10308274A1
公开(公告)日：2003-12-11
申请号：DE10308274
申请日：2003-02-26
申请人： HITACHI UNISIA AUTOMOTIVE LTD
发明人： NAKAMURA NAOMICHI , UNAMI SHIGERU , UENOSONO SATOSHI , FUJINAGA MASASHI , YOSHIMURA TAKASHI , IIJIMA MITSUMASA , KOIZUMI SHIN , AMMA HIROYUKI
IPC分类号： B22F3/10 , B22F3/17 , C22C33/02 , C22C38/00 , B22F3/12
摘要： A high density iron based forged part such as a mechanical part is produced by a method comprising the following steps in the sequence set forth: (a) preparing iron based powder mixture containing iron based metal powder and graphite powder; (b) preliminarily compacting the iron based powder mixture to form a preliminary compact; (c) sintering the preliminary compact in a non-oxidizing atmosphere whose nitrogen partial pressure is 30 kPa or less, at a temperature of 950° C. or more and of 1300° C. or less to form a forming material; and (d) forging the forming material by closed die forging or enclosed die forging to produce a high density forged part.

5. 发明专利

JP2007138273A Method for producing high density iron-based compacted body and high strength and high density iron-based sintered body 有权
标题翻译：生产高密度铁基压实体和高强度和高密度铁基烧结体的方法
公开(公告)号：JP2007138273A
公开(公告)日：2007-06-07
申请号：JP2005337197
申请日：2005-11-22
申请人： Jfe Steel Kk , Jfeスチール株式会社
发明人： UENOSONO SATOSHI , NAKAMURA NAOMICHI
IPC分类号： C22C33/02 , B22F3/10 , B22F3/24 , C22C38/00 , C22C38/46
摘要： PROBLEM TO BE SOLVED: To provide a method for stably producing an iron-based compacted body having a high density and thus an iron-based sintered body having a high strength and a high density.
SOLUTION: The method comprises pre-compacting an iron-based mixed powder prepared from an iron-based metal powder and a graphite powder, or further, a lubricant, pre-sintering the resulting pre-compacted body at a temperature of higher than 1000°C and not higher than 1300°C in a nonoxidizing atmosphere under the partial pressure of nitrogen satisfying ≤30 kPa, to prepare an iron-based sintered preform having a composition containing 0.10 to 0.50 mass% of C, 0.3 mass% or less of O and 0.010 mass% or less of N, and the balance Fe with inevitable impurities and having a density of 7.2 Mg/m
3 or more, and then subjecting the preform for compacting high density iron-based powder to a high velocity compaction at a ram velocity of ≥2 m/s.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供一种稳定地制造高密度的铁基压实体的方法，从而提供具有高强度和高密度的铁基烧结体。解决方案：该方法包括预先压制由铁基金属粉末和石墨粉末制备的铁基混合粉末，或进一步地，在较高温度下预烧结所得预压实体的润滑剂在非氧化性气氛下，在满足≤30kPa的氮气的条件下，在1000℃以上1300℃以下，制备含有0.10〜0.50质量％的C，0.3质量％的组成的铁基烧结预成型体，或较小的O和0.010质量％以下的N，余量为Fe与不可避免的杂质，密度为7.2Mg / m 3以上，然后使该预成型件压实高密度铁 - 在高于2m / s的冲击速度下进行高速压实。版权所有（C）2007，JPO＆INPIT

6. 发明专利

JP2004211129A Metal powder for powder magnetic core, and powder magnetic core using it 审中-公开
公开(公告)号：JP2004211129A
公开(公告)日：2004-07-29
申请号：JP2002379976
申请日：2002-12-27
申请人： Jfe Steel Kk , Jfeスチール株式会社
发明人： UEDA MASATERU , NAKAMURA NAOMICHI , MAETANI TOSHIO
IPC分类号： B22F1/02 , B22F3/00 , H01F1/24
摘要： PROBLEM TO BE SOLVED: To provide a metal powder for a powder magnetic core which has a high magnetic flux density together with a high strength of a compact and is useful for an iron core for a motor, and to provide the powder magnetic core using a surface-coated metal powder. SOLUTION: The metal powder is iron-based and has oxides mainly containing Al and B coated on the surface, wherein a molar ratio of Al to B in the oxides, Al/B, is 0.1 or more but less than 10. The method for manufacturing the powder magnetic core comprises adding an organic material such as a lubricant and a resin to the surface-coated powder, compression molding the mixture, and then heating it. COPYRIGHT: (C)2004,JPO&NCIPI

7. 发明专利

JP2005154863A Method for manufacturing metal powder for dust core 有权
标题翻译：制造金属粉末的方法
公开(公告)号：JP2005154863A
公开(公告)日：2005-06-16
申请号：JP2003397332
申请日：2003-11-27
申请人： Jfe Steel Kk , Jfeスチール株式会社
发明人： MAETANI TOSHIO , UEDA MASATERU , NAKAMURA NAOMICHI
IPC分类号： B22F1/02
摘要： PROBLEM TO BE SOLVED: To provide an advantageous method for manufacturing a metal powder for a dust core by which not only the efficiency of coating treatment for a powder can be raised but also magnetic properties can be improved to a greater extent when the metal powder is used for a dust core by improving green properties.
SOLUTION: In this method, a ferromagnetic metal powder 2 is held in a vessel 1, an agitator blade 3 set in the vessel is rotated at ≥1.5 m/s rotational speed at the end part, spray gas 6 performing the spraying of a coating solution is made to function also as gas for fluidization, and by blowing the spray gas 6 from above the ferromagnetic metal powder at a rate of ≥3.0 m/s into the ferromagnetic metal powder while agitating and fluidizing the metal powder, the ferromagnetic metal powder is heated and held at 60 to 110°C. In this way, the coating solution sprayed by the spray gas onto the surface of the ferromagnetic metal powder is dried to form a coating layer.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：为了提供一种制造用于粉芯的金属粉末的有利方法，其不仅可以提高粉末涂层处理的效率，而且可以在更大程度上提高磁性能金属粉末通过改善绿色特性用于粉尘芯。解决方案：在这种方法中，将铁磁性金属粉末2保持在容器1中，设置在容器中的搅拌器叶片3在端部处以≥1.5m/ s的转速旋转，进行喷雾的喷雾6 使涂层溶液也用作用于流化的气体，并且通过在铁粉金属粉末的上方以≥3.0m/ s的速度将喷雾气体6吹入强磁性金属粉末中，同时搅拌和流化金属粉末，将铁磁性金属粉末加热并保持在60〜110℃。以这种方式，将由喷雾气体喷射的涂覆溶液干燥到强磁性金属粉末的表面上以形成涂层。版权所有（C）2005，JPO＆NCIPI

8. 发明专利

JP2003303711A Iron base powder and dust core using the same, and method of manufacturing iron base powder 审中-公开
标题翻译：铁基粉末和使用其的粉末核心，以及制造铁基粉末的方法
公开(公告)号：JP2003303711A
公开(公告)日：2003-10-24
申请号：JP2002065515
申请日：2002-03-11
申请人： Jfe Steel Kk , Jfeスチール株式会社
发明人： UEDA MASATERU , NAKAMURA NAOMICHI
IPC分类号： B22F1/02 , H01F1/24 , H01F1/26 , H01F41/02 , H01F41/16
CPC分类号： H01F1/26 , H01F1/24 , H01F41/0246 , H01F41/16 , Y10T428/2991 , Y10T428/2993 , Y10T428/2995
摘要： PROBLEM TO BE SOLVED: To provide iron base powder having a heat-resistant insulating film and a dust core. SOLUTION: A coating material containing a silicon resin and pigment is added to powder as a raw material having iron as a main component, and the material and powder are stirred and mixed. After that, drying treatment is performed to form a film containing the silicon resin and pigment on the surface of the iron base powder. The ratio of the silicon resin content to the pigment content in the film is preferably 0.01 or higher and under 4.0 for mass ratio. The pigment preferably has more than one or two kinds among metal oxide, metal nitride, metal carbide, mineral and glass. The coating material may be sprayed onto the iron base powder in a flowing state. As the underlayer of the film, the film containing more than one or two kinds among a Si compound, Ti compound, Zr compound, P compound and Cr compound may be formed. COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：提供具有耐热绝缘膜和防尘芯的铁基粉末。解决方案：将含有硅树脂和颜料的涂料作为以铁为主要成分的原料添加到粉末中，并搅拌混合该材料和粉末。之后，进行干燥处理以在铁基粉末的表面上形成含有硅树脂和颜料的膜。硅树脂含量与膜中颜料含量的比例优选为0.01以上，质量比为4.0以下。颜料优选在金属氧化物，金属氮化物，金属碳化物，矿物和玻璃中具有多于一种或两种。涂料可以以流动状态喷涂到铁基粉末上。作为膜的底层，可以形成Si化合物，Ti化合物，Zr化合物，P化合物和Cr化合物中含有多于一种或两种的膜。版权所有（C）2004，JPO

9. 发明专利

JP2008240031A Preform for pressing using iron powder as raw material, and its manufacturing method 审中-公开
标题翻译：用铁粉作为原料进行压制及其制造方法
公开(公告)号：JP2008240031A
公开(公告)日：2008-10-09
申请号：JP2007079532
申请日：2007-03-26
申请人： Jfe Steel Kk , Jfeスチール株式会社
发明人： NAKAMURA NAOMICHI , UENOSONO SATOSHI
IPC分类号： C22C33/02 , B22F3/02 , B22F3/10 , C22C38/00
摘要： PROBLEM TO BE SOLVED: To provide a preform for pressing by which a high-density, high-strength iron-based sintered member can be produced without addition of expensive alloy components and also to provide its manufacturing method.
SOLUTION: An iron powder is mixed with a graphite powder or further a lubricating material and the resulting iron-based powder mixture is subjected to pressing and pre-sintering to manufacture the preform for pressing. In this manufacturing method, holding is done, as the pre-sintering, at 1,000 to 1,200°C for ≤60 sec in an inert atmosphere.
COPYRIGHT: (C)2009,JPO&INPIT

10. 发明专利

JP2005330573A Alloy steel powder for powder metallurgy 有权
标题翻译：用于粉末冶金的合金钢粉
公开(公告)号：JP2005330573A
公开(公告)日：2005-12-02
申请号：JP2004230629
申请日：2004-08-06
申请人： Jfe Steel Kk , Jfeスチール株式会社
发明人： UNAMI SHIGERU , OZAKI YUKIKO , UENOSONO SATOSHI , NAKAMURA NAOMICHI
IPC分类号： B22F1/02 , C22C38/00 , C22C38/46
摘要： PROBLEM TO BE SOLVED: To provide an alloy steel powder for powder metallurgy capable of increasing the bearing fatigue strength of a sintered compact while highly maintaining its density.
SOLUTION: The 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 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. In the alloy steel powder for powder metallurgy, a Mo average content [Mo]
T (mass%) satisfies formula 0.05≤[Mo]
T -[Mo]
p ≤0.8, wherein the content [Mo]
P is the above prealloyed Mo content (mass percent) in the iron-based powder. Thus the bearing fatigue strength of a sintered compact obtained from the alloy steel powder can be increased while increasing its density.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供一种能够在高度保持其密度的同时提高烧结体的轴承疲劳强度的粉末冶金用合金钢粉末。解决方案：用于粉末冶金的合金钢粉末包括含有约0.5质量％以下的Mn作为预合金元素的铁基粉末和作为预合金元素的Mo为0.2〜1.5质量％的铁基粉末; 以及粘结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％）满足公式0.05≤[Mo] T - [Mo] p ≤0.8，其中含量[Mo]≤P是铁基粉末中上述预合金化的Mo含量（质量百分比）。因此，可以增加由合金钢粉末获得的烧结体的轴承疲劳强度，同时增加其密度。版权所有（C）2006，JPO＆NCIPI

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