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公开(公告)号：JPH08176601A
公开(公告)日：1996-07-09
申请号：JP33557594
申请日：1994-12-20
发明人： OZAKI TSUTOMU , SAKAMOTO HIDEAKI , KANAYAMA TATSUYA , NAKAYAMA AKIRA , YAMAMOTO EIJI , MARUYAMA MASAO
摘要： PURPOSE: To uniformly and finely mix hydrocarbon of methane series in a slurry and to prevent the occurrence of coarse particles by adding a specified amt. of the hydrocarbon having a specified m.p. to hard powder, mixing and pulverizing them under cooling. CONSTITUTION: Hydrocarbon of methane series having 20-80 deg.C m.p. is added by 0.1-5 pts.wt. to 100 pts.wt. hard powder of stock such as cermet or ceramics and they are mixed and pulverized in lower alcohol while cooling a prepd. slurry to a temp. below the m.p. of the hydrocarbon by >=10 deg.C. The resultant slurry is passed through a >=200-mesh screen. The cooling is carried out, e.g. by circulating temp.-controlled cooling water through a mixer having a jacket system. The melting and recrystallization of the hydrocarbon in the slurry can be prevented, and When the slurry is passed through the screen, the rate of passing is not reduced and blocking is not caused.
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公开(公告)号：JPH08117580A
公开(公告)日：1996-05-14
申请号：JP28886694
申请日：1994-10-27
发明人： MATSUMOTO HIDEKAZU , KANAYAMA TATSUYA , NAKAYAMA AKIRA , YAMAMOTO EIJI , HONMA HIROYUKI , MARUYAMA MASAO
摘要： PURPOSE: To conduct economical mixing by measuring power necessary for mixing and pulverization of raw material powder and feeding back the change to the mixing conditions in a method for mixing hard powder in which raw material hard powder, hard media, and liquid solvents are mixed and pulverized. CONSTITUTION: An open wet type mixer is composed of a stirring blade 1 with blades 2, hard media 3, a jacket 4, a cooling pipeline 5, and a heat exchanger 6. After paraffin which improves the compressibility of of raw material hard powder and powder after pelletization is fed into the mixer, a solvent is added so that the raw material hard powder, paraffin, and hard media 3 are immersed, and the stirring blade 1 is rotated by a motor M to conduct mixing. In this process, slurry is heated with the passage of time to reduce the viscosity so that the load of the motor M is reduced to reduce power consumption. Therefore, power necessary for the mixing and pulverization of raw material powder is measured, and the change is fed back to the process conditions to control the mixing conditions.
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公开(公告)号：JP2009035810A
公开(公告)日：2009-02-19
申请号：JP2008123926
申请日：2008-05-09
发明人： KOYOSHI YUTA , YAMAMOTO EIJI , KUROKAWA KAZUO , UCHINO KATSUYA , KITAGAWA NOBUYUKI , KAWASHIMA MOTOYOSHI , MAKIHARA TOORU , KANAYAMA TATSUYA , MINATO YOSHIHIRO
摘要： PROBLEM TO BE SOLVED: To provide a cemented carbide suitable for tool raw materials and capable of contributing to the reduction of uneven wear and the extension of the life of tools.
SOLUTION: The cemented carbide is formed by bonding between tungsten carbide (WC) particles with a bonding phase mainly composed of cobalt (Co), and the average grain size of the WC particles is 0.1-0.5 μm, and the bonding phase contains 12 mass% or less of Co, excluding 0 mass% of Co. The average thickness of the bonding phase is 0.14 μm or smaller and 3σ
t is 0.2 or less when dispersion of the thicknesses is expressed by 3σ
t by using standard deviation σ
t of the thickness. In the cemented carbide of the invention, the bonding phases (black-colored parts in Fig. 1(I)) exist between micro WC particles (gray-colored parts in the same figure) thinly and evenly, and do not agglomerate micro-wisely and do not exist unevenly. Uneven wear can be suppressed and working superior in positional accuracy can be performed over a long-period of time when the cemented carbide having the microstructure like this is utilized for a micro-drill.
COPYRIGHT: (C)2009,JPO&INPIT摘要翻译： 要解决的问题：提供适合于工具原料的硬质合金，并能够有助于减少不均匀的磨损和延长工具的使用寿命。 解决方案：硬质合金通过碳化钨（WC）颗粒与主要由钴（Co）组成的粘结相结合而形成，WC颗粒的平均晶粒尺寸为0.1-0.5μm，结合相 含有12质量％以下的Co，不包括Co的0质量％。粘合相的平均厚度为0.14μm以下，3σ
t 为0.2以下， 3σ t ，使用厚度的标准偏差σ t 。 在本发明的硬质合金中，微观WC颗粒（相同图中的灰色部分）薄均匀地存在粘结相（图1（I）中的黑色部分）），并且不会微观聚集 不平均不存在。 可以抑制不均匀磨损，并且当具有这样的微结构的硬质合金用于微钻时，可以在长时间内执行位置精度优异的工作。 版权所有（C）2009，JPO＆INPIT -
公开(公告)号：JP2003251566A
公开(公告)日：2003-09-09
申请号：JP2002050689
申请日：2002-02-27
发明人： SAKAI TADAAKI , INOUE TOSHIO , YAMAMOTO EIJI , TAKAHASHI KUNIHIRO , YAMAMOTO YOSHIHITO , INOUE HARUO , FUKUSHIMA KENJI
摘要： PROBLEM TO BE SOLVED: To provide a super abrasive grain cutting wheel which can prevent any wear of a base plate during the cutting operation, and further enhance the cutting accuracy by avoiding any damages on the base plate caused by cutting chips of a work generated during the cutting operation. SOLUTION: A super abrasive grain cutting wheel 1 comprises a doughnut disk-shaped base plate 2 and a super abrasive grain layer 3 formed on an outer circumferential part of the base plate 2. The base plate 2 is formed of a hard material including a bond phase containing at least one element selected from a group consisting of iron, cobalt, nickel and chromium, a first hard phase containing tungsten carbide and a second hard phase containing nitride and/or carbonitride of at least one element selected from a group consisting of elements belonging to Groups 4a, 5a and 6a of the periodic table. COPYRIGHT: (C)2003,JPO
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公开(公告)号：JPH06321519A
公开(公告)日：1994-11-22
申请号：JP13521693
申请日：1993-05-14
摘要： PURPOSE:To enable the mass production of a fine particulate compound carbide, containing uniform particles and sufficiently converted into a solid solution at a low cost. CONSTITUTION:Tungsten oxide powder, TiO2 powder and carbon powder or tungsten oxide powder, TiO2 powder, carbon powder and at least one of group IVa oxide powder, group Va oxide powder and group VIa oxide powder are mixed and formed into a pellet with a binder to provide a pellet material, which is then treated in a nitrogen gas stream at 1450-1600 deg.C temperature using a rotary furnace to afford a primarily treated material. The resultant primarily treated material is then treated at 1750-1900 deg.C temperature in a vacuum.
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公开(公告)号：JPH0598385A
公开(公告)日：1993-04-20
申请号：JP29086791
申请日：1991-10-08
发明人： MARUYAMA MASAO , YAMAMOTO EIJI
IPC分类号： C22C29/08
摘要： PURPOSE:To provide a high capacity cemented carbide having high hardness as well as excellent in wear resistance by limiting the theoretical ratio of the quantity of saturation magnetism and reluctivity force of the alloy to prescribed numerical value. CONSTITUTION:This cover is a high capacity cemented carbide in which WC is used as the essential components of a hard phase as well as Co is regulated, by weight, 11 to 13% in a bonding phase and contg. 0.3 to 0.5% VC and 0.6 to 1.0% Cr, and as for the magnetic properties of the alloy, the theoretical ratio (delta) of the quantity of its saturation magnetism is regulated to 0.82 to 0.90 as well as its reluctivity force (Hc) to 345 to 420 (Oe). At the time of manufacturing a microdrill for drilling a printed board by using a cemented carbide having the above magnetic properties, the breaking and wear of the drill remarkably reduce, and its practical value increases.
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公开(公告)号：JPH0373206A
公开(公告)日：1991-03-28
申请号：JP20884889
申请日：1989-08-11
发明人： TOBIOKA MASAAKI , YAMAMOTO EIJI
摘要： PURPOSE:To enhance breakage resistance at a low cost, in a cermet tool having a surface layer in which the density of binding metal is thick and, under the surface layer, a hardened layer whose density is thinner than that of the interior, by removing the surface layer and the hardened layer from the rake face in the width of 0.05 to 1mm from the cutting edge. CONSTITUTION:In a cermet cutting tool having a surface layer in which the density of binding metal is thicker than that in the other part and, under the surface layer, a hardened layer in which the density of binding metal is thinner than that in the interior on the surface inexpensively manufactured by vacuum sintering, only the surface layer and the under hardened layer of the rake face are removed by grinding. In this case, since the part of the rake face relating to cutting is nearly equal to the feed at the time of cutting, removing of the surface layer and the hardened layer on the part of 0.05 to 1mm corresponding to the feed will suffice. In the grinding of a tip, the grinding of side surfaces requires much cost, but the grinding of the rake face can be easily and inexpensively carried out, and therefore it can most economically be carried out.
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