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1. 发明专利

JPH08176601A MIXING OF HYDROCARBON OF METHANE SERIES WITH HARD POWDER 失效
公开(公告)号：JPH08176601A
公开(公告)日：1996-07-09
申请号：JP33557594
申请日：1994-12-20
申请人： SUMITOMO ELECTRIC INDUSTRIES , HOKKAIDO SUMIDEN SEIMITSU KK
发明人： OZAKI TSUTOMU , SAKAMOTO HIDEAKI , KANAYAMA TATSUYA , NAKAYAMA AKIRA , YAMAMOTO EIJI , MARUYAMA MASAO
IPC分类号： B01F3/18 , B22F1/00
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.

2. 发明专利

JPH08143904A METHOD FOR PRESSING HARD POWDER 失效
公开(公告)号：JPH08143904A
公开(公告)日：1996-06-04
申请号：JP29079994
申请日：1994-11-25
申请人： HOKKAIDO SUMIDEN SEIMITSU KK , SUMITOMO ELECTRIC INDUSTRIES
发明人： KANAYAMA TATSUYA , SATO EIJI , MARUYAMA MASAO , MAEDA YOSHIKI
IPC分类号： B30B11/02 , B22F3/02
摘要： PURPOSE: To prevent the deposition of a hard powder on a mold and to form a green compact excellent in dimensional accuracy by pressing the hard powder filled in a mold and controlling the temp. of the obtained green compact or the mold to be below a reference temp. CONSTITUTION: A hard powder mixed with an appropriate lubricant is filled in a mold consisting of an outer die 1, an upper punch 2 and a lower punch 3, pressed and continuously compacted to obtain a green compact 6. In this pressing method, an IR thermometer 7 and an analyzer 8 are used to measure the temp. of the green compact 6 discharged from the mold or the mold. Further, the measured temp. is compared with the preset reference temp. in a press controller 9, and an outer die driver 4 and an upper punch driver 5 are controlled so that the temp. of the green compact or mold does not exceed the reference temp. Consequently, the lubricant in the hard powder is not softened or liquefied, the hard powder does not deposit on the mold, and the green compact is not burred or chipped.

3. 发明专利

JPH08117580A METHOD FOR MIXING HARD POWDER 失效
公开(公告)号：JPH08117580A
公开(公告)日：1996-05-14
申请号：JP28886694
申请日：1994-10-27
申请人： SUMITOMO ELECTRIC INDUSTRIES , HOKKAIDO SUMIDEN SEIMITSU KK
发明人： MATSUMOTO HIDEKAZU , KANAYAMA TATSUYA , NAKAYAMA AKIRA , YAMAMOTO EIJI , HONMA HIROYUKI , MARUYAMA MASAO
IPC分类号： B02C17/00 , B01F3/12 , B01F7/00 , B22F9/04
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.

4. 发明专利

JPH0790306A PRODUCTION OF HARD POWDER 失效
公开(公告)号：JPH0790306A
公开(公告)日：1995-04-04
申请号：JP25937993
申请日：1993-09-22
申请人： HOKKAIDO SUMIDEN SEIMITSU KK , SUMITOMO ELECTRIC INDUSTRIES
发明人： KANAYAMA TATSUYA , MARUYAMA MASAO , MINATO YOSHIHIRO
IPC分类号： B01J2/04 , B22F1/00
摘要： PURPOSE:To produce a granulated powder excellen in fluidity and to obtain an alloy high in dimensional precision without defects such as cavities from the granulated powder by spray-driving slurry consisting of an organic solvent and a raw powder such as cermet, thereby forming granulated powder having prescribed fluidity. CONSTITUTION:The slurry is prepared by mixing an organic solvent such as alcohol, hexane with a raw powder such as a cemented carbide or cermet. The density, viscosity and concn, of the slurry are adjusted to 10 to 50% in terms of the ratio to the true density of the powder, 10 to 500cps and 50 to 80wt.%, respectively. The slurry is granulated by spray-drying it into a granulated powder having 0.24 to 0.04sec/cc fluidity measured by using the measuring funnel whose orifice diameter is 8mm and other shapes are specified by JIS Z-2502.

5. 发明专利

JPH073306A HIGH-STRENGTH SINTERED HARD ALLOY COMPOSITE MATERIAL AND PRODUCTION THEREOF 失效
公开(公告)号：JPH073306A
公开(公告)日：1995-01-06
申请号：JP27526992
申请日：1992-09-17
申请人： KAMODA SHUICHI , SAKAI MASAHIRO , MIYAKOSHI YASUKI , MAKINO ISAO , HOKKAIDO SUMIDEN SEIMITSU KK , SUMITOMO ELECTRIC INDUSTRIES
发明人： KAMODA SHUICHI , SAKAI MASAHIRO , MIYAKOSHI YASUKI , MAKINO ISAO , KANAYAMA TATSUYA , YAMAGUCHI KAZUHIRO , MARUYAMA MASAO , SHIBATA ISAO , MINATO YOSHIHIRO
IPC分类号： B22F7/00 , C22C29/08
摘要： PURPOSE:To join a sintered hard alloy and a sintered hard alloy for joining or these alloys and steel with high strength by specifying the ratio of the bond phase in the sintered hard alloy for joining of the composite material formed by diffusion joining the high-hardness sintered hard alloy and the sintered hard alloy for joining. CONSTITUTION:The high-hardness sintered hard alloy is obtd. by producing a disk- shaped press-molded product 2 consisting of ductile and tough sintered hard alloy powder 1 formed by mixing WC powder and Co powder having, for example, 5.0mu average grain size at 89% WC-11wt.% Co. This sintered hard alloy is sintered for one hour at 1400 deg.C in a vacuum sintering furnace. This plunger body 2 is inserted into a sintered hard alloy die 3 and the sintered hard alloy powder for joining which is a powder mixture composed of 60% WC-40% Co of the above-mentioned powders is laminated thereon at 15mm thickness and is pressurized under about 1ton/cm . The resultant combination body is taken out and is subjected to hot press sintering for one hour under 50kg/cm at 1250 deg.C in a vacuum atmosphere. The sintering is so executed that the ratio of the bond phase in the sintered hard alloy for joining is higher by 10 to 45wt.% than the ratio of the bond phase in the high-hardness sintered hard alloy at that time.

6. 发明专利

JPH08333606A PRODUCTION OF HARD BALL 失效
公开(公告)号：JPH08333606A
公开(公告)日：1996-12-17
申请号：JP16150195
申请日：1995-06-05
申请人： SUMITOMO ELECTRIC INDUSTRIES , HOKKAIDO SUMIDEN SEIMITSU KK
发明人： KANAYAMA TATSUYA , SATO EIJI , MARUYAMA MASAO , MAEDA YOSHIKI
IPC分类号： B30B11/00 , B22F3/00 , B22F3/035 , B22F5/00
摘要： PURPOSE: To obviate the occurrence of fine defect and fissures by forming a cavity to delineate the shape of a hard ball by a die and upper and lower punches having specific shapes in a process for production of sintering a molding formed by compression molding of raw material powder. CONSTITUTION: The upper punch 1 has the cavity having the hemispherical or semielliptic inside surface corresponding to the half of the hard ball at its front end. The lower punch 4 has the cavity having the partially spherical inside surface of the shape corresponding to the shape near the vertex of the shape of the hard ball at the front end facing the cavity of the upper punch 1. The die 3 has the inside surface shape capable of delineating the shape of the hard ball together with the inside surface of the cavity of the punches 1, 4 and has the through-hole to allow the insertion of the punch 4 in the bottom peak part of the inside surface. These punches and die are used and after the raw material powder is loaded into the cavity formed by the punch 1 and the die 3, the punch 4 is passed into the through-hole and thereafter, compressive pressure is applied thereon from behind the punch 4, by which the raw material powder is compression molded.

7. 发明专利

JPH0790304A HARD POWDER MIXING MEDIUM 失效
公开(公告)号：JPH0790304A
公开(公告)日：1995-04-04
申请号：JP25937793
申请日：1993-09-22
申请人： HOKKAIDO SUMIDEN SEIMITSU KK , SUMITOMO ELECTRIC INDUSTRIES
发明人： KANAYAMA TATSUYA , KIMURA SHIGETOSHI , MARUYAMA MASAO , MINATO YOSHIHIRO
IPC分类号： B22F1/00 , B22F5/00 , B22F5/12 , G21F9/36
摘要： PURPOSE:To prolong the service life of the hard powder mixing medium, to reduce the mixing cost and to improve the purity of the resulting powdery mixture by specifying the particle size, hardness and coefficient of wear resistance of the medium charged and mixed together with the raw powders in order to pulverize and mix these raw powders at prescribed values. CONSTITUTION:This medium has a spherical or cylindrical shape and consists of a cemented carbide contg. >=60wt.% (WC+Co) as the major component wherein the average particle size of the WC is 0.3 to 10mum. The medium charged and mixed together with the hard raw powders and the raw powders are pulverized and mixed by rotating them for a specified time in a dry or wet process to obtain the powder of a cemented carbide, cermet, etc. The hardness of the cemented carbide medium is 86 to 94 (HRA) and the coefficient of wear resistance of the medium specified by the method defined in CCPA P-112 is

8. 发明专利

JPH0792074A METHOD AND DEVICE FOR MEASURING GRAIN SIZE OF POWDER 失效
公开(公告)号：JPH0792074A
公开(公告)日：1995-04-07
申请号：JP25937893
申请日：1993-09-22
申请人： HOKKAIDO SUMIDEN SEIMITSU KK , SUMITOMO ELECTRIC INDUSTRIES
发明人： KANAYAMA TATSUYA , MARUYAMA MASAO , MINATO YOSHIHIRO
IPC分类号： G01N15/14
摘要： PURPOSE:To provide a method for efficiently and precisely measuring the grain size of a granulated powder consisting of a cemented carbide, thermet, or ceramic used for powder metallurgy. CONSTITUTION:A granulated powder 3 is supplied to a measuring part 6 in dry method while adding a vibration thereto by a guide 1, and after air 5 is blown thereto just before measurement to disperse the granulated powder 3, the grain size of the granulated powder consisting of cemented carbide, thermet or ceramic is measured by an optical method such as laser or X-ray.

9. 发明专利

JPH0790307A PRODUCTION OF POWDER AND DEVICE THEREFOR 失效
公开(公告)号：JPH0790307A
公开(公告)日：1995-04-04
申请号：JP25938193
申请日：1993-09-22
申请人： HOKKAIDO SUMIDEN SEIMITSU KK , SUMITOMO ELECTRIC INDUSTRIES
发明人： KANAYAMA TATSUYA , NAKAYAMA AKIRA , MARUYAMA MASAO , MINATO YOSHIHIRO , KAWASAKI NORIAKI
IPC分类号： B01J2/04 , B22F1/00
摘要： PURPOSE:To prevent the crushing and aggregation of the granulated powder and to efficiently and safely produce the high-quality powder by cooling the granulated power produced by spray-drying a slurry consisting of an organic solvent and a hard metal while vibrating the powder, and automatically packaging it. CONSTITUTION:The slurry consisting of an organic solvent such as alcohol, hexane and a hard metal powder is sprayed in the chamber 2 of the spray drier 1 to granulate it into spherical shape and the granulated product powder is cooled while vibrating it by using the vibrating and cooling device 4. Then the granulated powder, after cooling it, is packaged through automatically weighing and packing it by using an automatic weighing and packaging device 8 to produce the packaged product of a cemented carbide, cermet or ceramic powder. All these devices are explosion-proof or air-driven devices and arranged so that they can be operated continuously.

10. 发明专利

JPH0790305A HARD POWDER 失效
公开(公告)号：JPH0790305A
公开(公告)日：1995-04-04
申请号：JP25938093
申请日：1993-09-22
申请人： HOKKAIDO SUMIDEN SEIMITSU KK , SUMITOMO ELECTRIC INDUSTRIES
发明人： KANAYAMA TATSUYA , MARUYAMA MASAO , MINATO YOSHIHIRO
IPC分类号： B22F1/00
摘要： PURPOSE:To form a uniform pressed body and to prevent cracks and cavities from being generated after sintering the pressed body by blending a cemented carbide or cermet powder with prescribed ratios of a paraffin hydrocarbon and stearic acid so as to improve the fluidity of the completed powder at the time of pressing it. CONSTITUTION:This cemented carbide or cermet powder is produced by the powder metallurgy and the particle size of the hard particles in the cemented carbide powder is adjusted to

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