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公开(公告)号：US06372015B1
公开(公告)日：2002-04-16
申请号：US09463563
申请日：2000-01-27
申请人： Tsuyoshi Asai , Hideo Takatori , Wataru Kagohashi
发明人： Tsuyoshi Asai , Hideo Takatori , Wataru Kagohashi
IPC分类号： B22F912
CPC分类号： B22F9/28
摘要： A process for production of metallic powder comprising contacting a metallic chloride gas with a reductive gas in a temperature range for a reducing reaction to form a metallic powder and subsequently contacting the metallic powder with an inert gas such as nitrogen gas to cool the powder, wherein the rate of cooling is 30° C. or more for temperatures from the temperature range for the reducing reaction to a temperature of 800°C. or less. The metallic powder is rapidly cooled, which results in suppression of agglomeration of particles in the metallic powder and the growth of secondary particles. Growth of particles of a metallic powder formed in a reduction process into secondary particles through agglomeration after the reduction process is suppressed, and a ultrafine metallic powder having a particle diameter of, for example, 1&mgr;m or less, can be reliably produced.
摘要翻译： 一种金属粉末的制造方法，其特征在于，在还原反应的温度范围内使金属氯化物气体与还原性气体接触，形成金属粉末，随后使金属粉末与氮气等惰性气体接触，使粉末冷却， 对于从还原反应的温度范围到800℃的温度的温度，冷却速率为30℃以上。 或更少。 金属粉末被快速冷却，这导致抑制金属粉末中的颗粒附聚和二次颗粒的生长。 在还原处理后，通过还原过程中的附聚将在还原过程中形成的金属粉末的颗粒生长成二次颗粒，并且可以可靠地制造具有例如1μm或更小的粒径的超细金属粉末。
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公开(公告)号：US4290807A
公开(公告)日：1981-09-22
申请号：US942499
申请日：1978-09-13
申请人： Tsuyoshi Asai , Naoji Fujimori , Takaharu Yamamoto
发明人： Tsuyoshi Asai , Naoji Fujimori , Takaharu Yamamoto
CPC分类号： C22C29/00
摘要： This invention relates to a hard alloy consisting of a metallic phase and a hard phase having a B1 type crystal structure, and being represented by the following general formula,(M.sub.1a, M.sub.2b, M.sub.3c)(C.sub.1-x-y N.sub.y O.sub.x).sub.zin which M.sub.1 is at least one of Group IVa elements, M.sub.2 is at least one of Group VIa elements, M.sub.3 is at least one of Group Va elements, C is carbon, N is nitrogen, O is oxygen, a, b, c, x and y are respectively atomic ratios satisfying the relations of a+b+c=1, 0.1.ltoreq.(a+c)/a+b+c).ltoreq.0.7 (c can be zero), 0.05.ltoreq.x.ltoreq.0.5, 0.ltoreq.y.ltoreq.0.5, 0.05.ltoreq.x+y.ltoreq.0.6 and z is an atomic ratio of (C+N+O)/M.sub.1 +M.sub.2 +M.sub.3) satisfying the relation of 0.1.ltoreq.z.ltoreq.0.5.
摘要翻译： 本发明涉及由金属相和具有B1型晶体结构的硬相组成的硬质合金，由以下通式表示：（M1a，M2b，M3c）（C1-x-yNyOx）z，其中M1 是Ⅳa族元素中的至少一种，M2是Ⅵa族元素中的至少一种，M3是Va族元素中的至少一种，C是碳，N是氮，O是氧，a，b，c，x和y 分别是满足a + b + c = 1，0.1（=（a + c）/ a + b + c）= 0.7的关系的原子比（c可以为零），0.05 < =0.5,0,0≤y≤0.5,0.05≤x+y≤0.6，z是满足关系为0.1的（C + N + O）/ M1 + M2 + M3的原子比
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公开(公告)号：US4239536A
公开(公告)日：1980-12-16
申请号：US940617
申请日：1978-09-08
CPC分类号： C23C30/005 , C23C16/30 , Y10T428/12028 , Y10T428/12146 , Y10T428/294 , Y10T428/2942 , Y10T428/2949
摘要： This invention relates to a surface-coated sintered hard body comprising an alloy consisting of at least one of carbides and carbonitrides of Group IVa, Va and VIa transition metals, cemented by at least one of metals and alloys, and two interior and exterior coated layers, the interior layer being a monolayer or multilayer consisting of at least one of carbides, carbonitrides and nitrides of Group IVa, Va and VIa transition metals, in which a part of the non-metallic element or elements are optionally replaced by oxygen, and at least one layer of the interior layer consisting of at least one of carbides, carbonitrides and nitrides of Group IVa, Va and VIa transition metals, in which a part or all of the non-metallic element or elements are replaced by boron, and the exterior layer consisting of at least one of aluminum oxide, zirconium oxide and mixtures or compounds thereof.
摘要翻译： 本发明涉及一种表面涂覆的烧结硬质体，它包括由至少一种碳化物和碳氮化物组成的合金，Ⅳa族，Ⅴa族和Ⅵa族过渡金属，通过金属和合金中的至少一种粘合，以及两个内部和外部涂层 内层是由IVa，Va和VIa族过渡金属中的至少一种碳化物，碳氮化物和氮化物中的至少一种组成的单层或多层，其中非金属元素的一部分任选被氧代替，并且在 至少一层由至少一种第Ⅳa，Ⅴa和Ⅵa族过渡金属的碳化物，碳氮化物和氮化物组成的层，其中部分或全部非金属元素被硼代替，外部 由氧化铝，氧化锆及其混合物或化合物中的至少一种组成的层。
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公开(公告)号：US4120719A
公开(公告)日：1978-10-17
申请号：US747689
申请日：1976-12-06
申请人： Toshio Nomura , Tsuyoshi Asai , Takaharu Yamamoto , Akio Hara
发明人： Toshio Nomura , Tsuyoshi Asai , Takaharu Yamamoto , Akio Hara
CPC分类号： C22C29/04
摘要： The present invention relates to a hard cemented carbonitride alloy for cutting tools, which comprises 97 to 75% by weight of a hard phase and 3 to 25% by weight of a binder metal, the hard phase consisting of metallic components of titanium as a main component, 5 to 40% by weight of one or more of tungsten and molybdenum and 3 to 40% by weight of tantalum and non-metallic components of carbon and nitrogen, the proportion of nitrogen being 5 to 40% by weight of the non-metallic components and the binder metal being at least one element selected from the group consisting of iron, cobalt and nickel.
摘要翻译： 本发明涉及一种用于切割工具的硬质粘结碳氮化物合金，其包含97-75重量％的硬质相和3-25重量％的粘合剂金属，硬相由钛的金属组分作为主要 5至40重量％的钨和钼中的一种或多种，3至40重量％的钽和碳和氮的非金属组分，氮的比例为5至40重量％ 金属组分和粘合剂金属是选自铁，钴和镍中的至少一种元素。
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公开(公告)号：US5054967A
公开(公告)日：1991-10-08
申请号：US442813
申请日：1989-11-29
IPC分类号： B23B27/04
CPC分类号： B23B27/04 , B23B2205/02 , B23B2222/21 , B23B2222/64 , B23B2228/28 , Y10T407/1904 , Y10T407/194 , Y10T407/22 , Y10T407/2288 , Y10T407/25 , Y10T407/27
摘要： A throw away cutting tool comprising a holder formed with a wedge groove and a throw away insert having a cutting edge at one end thereof and a wedge portion at the other end, the wedge portion being adapted to be clamped in the wedge groove by elasticity of the material of the holder. The holder is at least partly made of cemented carbide for higher rigidity and cutting stability. Also, the radius of curvature at the deep end of the wedge groove is optimized for crack resistance. Further, the angle of the V-ridge on the holder is interrelated to the angle of the V-groove in the insert for more holding stability and crack resistance.
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公开(公告)号：US4277283A
公开(公告)日：1981-07-07
申请号：US971829
申请日：1978-12-19
CPC分类号： C23C30/005 , C22C1/051 , C22C29/04 , C22C29/06
摘要： This invention relates to a sintered hard metal for cutting tools and having excellent wear resistance, resistance to thermal deformation, mechanical strength and the like. The present invention resides in the fact that the substrate metal consists of a rich content of the B-1 type hard phase and the surface thin layer consists of a rich content of the ordinary tungsten carbide. B-1 type crystal structure contains one or more Group IVa, Va and VIa metals, carbon, nitrogen and, moreover, tungsten. The thin layer structure has the layer of 5 to 200.mu. thickness on the surface thereof.
摘要翻译： 本发明涉及一种用于切割工具的烧结硬质金属，具有优异的耐磨性，耐热变形性，机械强度等。 本发明的目的在于，基底金属由丰富的B-1型硬质相组成，表面薄层由富含普通碳化钨组成。 B-1型晶体结构含有一种或多种IVa，Va和VIa族金属，碳，氮，以及钨。 薄层结构在其表面上具有5至200μm厚度的层。
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公开(公告)号：US06500227B1
公开(公告)日：2002-12-31
申请号：US09720486
申请日：2001-01-23
申请人： Tsuyoshi Asai , Hideo Takatori
发明人： Tsuyoshi Asai , Hideo Takatori
IPC分类号： B22F100
CPC分类号： B22F9/28 , B22F2998/00 , B22F1/0018 , B22F1/0048
摘要： In a process for production of ultrafine nickel powder, raw material gas having a partial pressure of nickel chloride vapor within a range from 0.2 to 0.7 is fed into a reducing furnace and the nickel chloride vapor is reduced with hydrogen while flowing the raw material gas in this reducing furnace at a space velocity (SV) within a range from 0.02 to 0.07 sec−1.
摘要翻译： 在超细镍粉的制造方法中，将氯化镍蒸汽的分压为0.2〜0.7的原料气体供给到还原炉中，在将原料气体流入的同时，将氯化镍蒸气还原， 该还原炉的空速（SV）在0.02〜0.07秒-1的范围内。
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公开(公告)号：US20060162496A1
公开(公告)日：2006-07-27
申请号：US10528372
申请日：2003-09-12
申请人： Tsuyoshi Asai , Takuya Miyagi
发明人： Tsuyoshi Asai , Takuya Miyagi
IPC分类号： B22F9/28
CPC分类号： B22F9/28
摘要： An object of the present invention is to provide a method for production of metallic powder in which aggregation of particles and growth to secondary particle after reducing process of the metallic powder particle can be prevented, to reliably obtain metallic particles containing few coarse particles and to meet requirements of thinner layer and greater number of layers in recent capacitors, and a production device therefor. The present invention includes a reducing process in which metal chloride gas and reducing gas are contacted to continuously reduce the metal chloride, and a cooling process in which a gas containing metallic powder generated in the reducing process is continuously cooled by inert gas. In the cooling process, a vortex flow is generated by blowing out the inert gas from at least one part around the flowing passage of the metallic powder. Furthermore, during the production of the metallic powder, inert gas flow is generated in the vertical direction along the inner wall of the production device (reducing process and cooling process) continuously. Aggregation of the metallic powder and growth of secondary particles can be reduced to reliably obtain metallic powder having uniform particle size containing few coarse particles.
摘要翻译： 本发明的目的是提供一种金属粉末的制造方法，其中可以防止金属粉末颗粒的还原过程后的颗粒和生长到二次颗粒的聚集，以可靠地获得含有少量粗颗粒的金属颗粒并满足 最近电容器中较薄层和更多层数的要求及其制造装置。 本发明包括使金属氯化物气体和还原气体接触以连续地还原金属氯化物的还原过程，并且在还原过程中产生的含有金属粉末的气体通过惰性气体连续冷却的冷却过程。 在冷却过程中，通过从金属粉末的流动通道周围的至少一部分吹出惰性气体而产生涡流。 此外，在制造金属粉末的过程中，沿着生产装置的内壁（还原过程和冷却过程）在垂直方向上产生惰性气体流。 可以减少金属粉末的聚集和二次粒子的生长，以可靠地获得具有少量粗粒子的均匀粒径的金属粉末。
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公开(公告)号：US4909677A
公开(公告)日：1990-03-20
申请号：US195330
申请日：1988-05-18
IPC分类号： B23B27/04
CPC分类号： B23B27/04 , B23B2205/02 , B23B2222/21 , B23B2222/64 , B23B2228/28 , Y10T407/1904 , Y10T407/194 , Y10T407/22 , Y10T407/2288 , Y10T407/25 , Y10T407/27
摘要： A throw away cutting tool comprising a holder formed with a wedge groove and a throw away insert having a cutting edge at one end thereof and a wedge portion at the outer end, the wedge portion being adapted to be clamped in the wedge groove by elasticity of the material of the holder. The holder is at least partly made of cemented carbide for higher rigidity and cutting stability. Also, the radius of curvature at the deep end of the wedge groove is optimized for crack resistance. Further, the angle of the V-ridge on the holder is interrelated to the angle of the V-groove in the insert for more holding stability and crack resistance.
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公开(公告)号：US4639352A
公开(公告)日：1987-01-27
申请号：US808228
申请日：1985-12-13
申请人： Mitsuo Kodama , Masaya Miyake , Minol Nakano , Tsuyoshi Asai , Akio Hara
发明人： Mitsuo Kodama , Masaya Miyake , Minol Nakano , Tsuyoshi Asai , Akio Hara
CPC分类号： C01B31/34 , C01B31/301 , C22C1/051 , C22C29/00 , C22C29/02 , C01P2004/80 , C01P2006/10 , C01P2006/80 , C01P2006/90
摘要： This invention relates to a hard alloy comprising two phases: a hard phase consisting of at least one compound having a crystal structure of simple hexagonal MC type (M: metal; C: carbon) selected from the group consisting of mixed carbides, carbonitrides and carboxynitrides of molybdenum and tungsten, and a binder phase consisting of at least one element selected from the group consisting of iron, cobalt and nickel. The hard phase is prepared by carburizing an (Mo, W) alloy obtained by reducing oxides of molybdenum and tungsten with a particle size of at most 1 micron, is composed of coarse particles with a mean particle size of at least 3 microns, and has a uniform molybdenum to tungsten ratio in the particles. The hard alloy has a gross composition within the range of the shaded portion ABCDEA in FIG. 1.
摘要翻译： 本发明涉及包含两相的硬质合金：由至少一种具有简单的六方晶系MC型（M：金属; C：碳）的晶体结构的化合物组成的硬质相，该化合物选自混合碳化物，碳氮化物和羧基氮化物 的钼和钨，以及由至少一种选自铁，钴和镍的元素组成的粘结相。 硬相是通过将通过还原氧化钼和钨的粒径至多为1微米的（Mo，W）合金进行渗碳制备的，由具有至少3微米的平均粒度的粗颗粒组成，并且具有 颗粒中钼与钨的比例均匀。 该硬质合金的总组成在图7中的阴影部分ABCDEA的范围内。 1。
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