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1. 发明专利

JPH10100309A SINTERED HARD ALLOY COMPOSITE MATERIAL 失效
公开(公告)号：JPH10100309A
公开(公告)日：1998-04-21
申请号：JP28139996
申请日：1996-10-02
申请人： SUMITOMO COAL MINING
发明人： AKASHI TAMOTSU , MAKI KOJI , TANI MASAHITO , ANDO HIDEO , MATSUI SHIGERU
IPC分类号： B23B27/14 , B22F7/08 , B23K9/00 , B23K15/00 , B23K20/00 , B23K20/12 , B23K31/00 , B32B15/01
摘要： PROBLEM TO BE SOLVED: To disperse and relax residual stress generated in a sintered hard alloy material in a bonding and cooling process not only to improve bonding strength but also to prevent a flaw such as a crack by providing a dividing surface extending in a direction vertical and/or oblique to a bonding surface to the ferrous material bonded to a sintered hard alloy material. SOLUTION: The ferrous materials 3 bonded to a sintered hard alloy material 2 have dividing surfaces 6 extending in the direction vertical to a bonding surface 5 and the dividing faces 6 have a gap 7 and may be extended in the direction oblique to the bonding surface 5 and the dividing surface 6 extending in a vertical direction and the dividing surface 6 extending in an oblique direction may be combined. When carbon steel is sintered to be bonded to the sintered hard alloy material obtained by filling the material loading part of an electrification sintering mold die with an WC-Co alloy powder and by sintering it through electrification this powder, deformation or a crack is not generated in the sintered hard alloy and a sintered hard alloy composite material of a sufficient bonding strength can be obtained.

2. 发明专利

JPH09300024A COMPLEX TOOL MATERIAL JOINING STEEL AND CEMENTED CARBIDE AND PRODUCTION THEREOF 失效
公开(公告)号：JPH09300024A
公开(公告)日：1997-11-25
申请号：JP14076996
申请日：1996-05-10
申请人： SUMITOMO COAL MINING
发明人： AKASHI TAMOTSU , MAKI KOJI , TANI MASAHITO , ANDO HIDEO
IPC分类号： B21D28/14 , B21D37/01 , B21D37/20 , B22F3/10 , B22F3/105 , B22F7/04 , B32B15/01 , C22C29/08
摘要： PROBLEM TO BE SOLVED: To obtain a high hardness and high toughness complex tool which improves the joined force with a steel and services an intermediate layer part as residual stress releasing layer, by arranging a cemented carbide having much weldable bonding phase quantity with the steel at a part contacting with the steel of a base material and joining the high hardness and high resistant cemented carbide through the intermediate layer. SOLUTION: The cemented carbide working part 1 of the complex tool is consttuted with a wear resistant layer 1a composed of a WC base cemented carbide containing

3. 发明专利

JPH1136005A COMPOUND DIE MATERIAL FOR PRESS FORMING, ITS PRODUCTION, AND PRESS FORMING DIE CONSISTING OF THE MATERIAL 失效
公开(公告)号：JPH1136005A
公开(公告)日：1999-02-09
申请号：JP20855897
申请日：1997-07-17
申请人： HOKKAIDO PREFECTURE , HOKKAIDO ELECTRIC POWER , SUMITOMO COAL MINING
发明人： KAMODA SHUICHI , INABA SHIGERU , MAKI KOJI , AKASHI TAMOTSU
IPC分类号： B21D37/01 , B21D37/20 , B21J7/00 , B22F3/10 , B22F3/105 , B22F3/14 , B22F5/00 , B22F7/00 , B22F7/08 , C04B35/64 , C22C29/08
摘要： PROBLEM TO BE SOLVED: To provide a block for die construction, where a sintered compact of cemented carbide and a steel material are metallurgically integrally joined to each other. SOLUTION: The block is a block 1 of die material in which a tungsten- carbide-base cemented carbide and a steel material 3 are integrally joined to each other. Moreover, this block is composed of a sintered compact of tungsten- carbide-base cemented carbide at least in three layers where the content of a binding phase component is decreased in a surface layer part 4 and increased stepwise from the surface layer part with the approach to an inner layer part 6, and further, the steel material 3 is joined to the inner layer part by diffusion reaction. Plural blocks mentioned above are arranged to constitute a die surface and form a press forming die. The fixing of the die to a backing plate by means of welding or bolting can easily be performed via the steel material, and dies of various shapes can be produced by the arrangement of the blocks. The surface layer part of the sintered compact of cemented carbide, to be the press working surface of a die, has excellent wear resistance, and a die surface having durability can be formed.

4. 发明专利

JPH1017904A ENERGIZED SINTERING METHOD 失效
公开(公告)号：JPH1017904A
公开(公告)日：1998-01-20
申请号：JP19401496
申请日：1996-07-04
申请人： SUMITOMO COAL MINING
发明人： AKASHI TAMOTSU , MAKI KOJI , TANI MASAHITO , ANDO HIDEO , MATSUI SHIGERU
IPC分类号： B22F3/14
摘要： PROBLEM TO BE SOLVED: To provide an energized sintering method, by which the damage to a forming die is prevented and the forming die can be repeatedly be used for long time and the producing cost can be reduced. SOLUTION: This method charges powdery material M into the forming die 1 and compacted with a punch 2 to make a green compact, and the energized sintering is executed by impressing the voltage to the green compact through the punch 2 to obtain the sintered compact. In such a case, a sleeve 3 composed of a carbonaceous material is fitted to at least the surface contacting with the powdery material in the inner surface of the formed die and a plate 4 composed of the carbonaceous material is arranged on the end surface contacting with the powdery material M of the punch 2 to execute the formation of the green compact and the energized sintering of the green compact.

5. 发明专利

JPH09165275A CERAMIC CONJUGATE SINTERED BODY HAVING ULTRA-HARDNESS AND ITS PRODUCTION 失效
公开(公告)号：JPH09165275A
公开(公告)日：1997-06-24
申请号：JP34803495
申请日：1995-12-15
申请人： SUMITOMO COAL MINING
发明人： AKASHI TAMOTSU , MAKI KOJI , TANI MASAHITO , ANDO HIDEO
IPC分类号： C04B37/02 , B22F7/06
摘要： PROBLEM TO BE SOLVED: To obtain a ceramic conjugate sintered body useful as an abrasion resistant material excellent in abrasion resistance and corrosion resistance and capable of directly welding to stainless steel or steel by joining a specific abrasion resistant layer and a specific weldable layer under specific conditions. SOLUTION: This conjugate sintered body is obtained by integrally sintering and joining an abrasion resistant layer (1a) of a ceramic sintered body (e.g. an alumina-20% silicon nitride sintered body) consisting of one or more selected from alumina, zirconia, silicon carbide and silicon nitride with a weldable layer (1b) of tungsten carbide-based ultra hard alloy (e.g. tungsten carbide-30% nickel alloy) containing 15-40wt.% of a metallic bonding phase, directly or through an interlayer (1c) consisting of a mixture of the components of these layers (1a), (1b).

6. 发明专利

JPH09150932A SCREW CONVEYOR BLADE 失效
公开(公告)号：JPH09150932A
公开(公告)日：1997-06-10
申请号：JP33808195
申请日：1995-11-30
申请人： SUMITOMO COAL MINING
发明人： AKASHI TAMOTSU , MAKI KOJI , TANI MASAHITO , ANDO HIDEO
IPC分类号： B65G33/26 , B04B1/20
摘要： PROBLEM TO BE SOLVED: To increase the strength of adhesion by welding to a blade tip part by providing a wear resistant material fixed to the tip part of a screw conveyor blade as a cemented carbide wear resistant material in which a wear resistant layer having a small metallic coupling phase amount in a sintered hard alloy and a weldable layer having a large metallic coupling phase amount are integrally sintered and joined together. SOLUTION: In screw conveyor suitably used for a decanter type centrifugal separator, in a screw conveyor blade in which a wear resistant material 12 is adhered to its tip part 3, for the wear resistant material 1, a portion of the action surface 5 of an article moving side is made to be a cemented carbide type wear resistant layer 1a having a metallic coupling phase amount of 2 to 10% by weight. A portion of its back side is made to be a cemented carbide type weldable layer 1b having a metallic coupling phase amount of 15 to 40% by weight. These two layers are integrally joined together by direct sintering joining and/or indirect joining via middle layer 1c provided between the two layers and in the cemented carbide type weldable layer 1b, the layers are adhered to the tip part 3 of the screw conveyor blade helically and in series by direct welding.

7. 发明专利

JP2000239071A ELECTROSINTERING METHOD 失效
公开(公告)号：JP2000239071A
公开(公告)日：2000-09-05
申请号：JP4294799
申请日：1999-02-22
申请人： SUMITOMO COAL MINING
发明人： AKASHI TAMOTSU , MAKI KOJI
IPC分类号： B22C3/00 , B22F3/14 , C04B35/64
摘要： PROBLEM TO BE SOLVED: To provide an electrosintering method intended to prevent formation of a deteriorated layer in the surface layer part of a sintered compact through obviating or reducing microdischarge and to produce the sintered compact with uniform texture and properties through obviating or reducing a nonuniformity in temperature distribution for the power material in the electrosintering operation. SOLUTION: In this electrosintering method comprises charging a molding die with a powder material, compressing the material with a punch to make a green compact, and applying voltage via the punch to the green compact to accomplish electrosintering to obtain the sintered compact, electric current is allowed to low by interposing a semiconductive layer consisting of a heat- resistant electroconductive material and a heat-resistant electrical insulation material along the interface where the powder material is in contact with the molding die and/or punch.

8. 发明专利

JP2000237899A FORMING DIE FOR ELECTRIC SINTERING 失效
公开(公告)号：JP2000237899A
公开(公告)日：2000-09-05
申请号：JP4294699
申请日：1999-02-22
申请人： SUMITOMO COAL MINING
发明人： AKASHI TAMOTSU , MAKI KOJI
IPC分类号： B30B11/02 , B22C7/00 , B22F3/14 , C04B35/64
摘要： PROBLEM TO BE SOLVED: To provide a forming die for electric sintering for manufacturing a prismatic sintered body in which the stable attached condition can be obtained in a punch, the forming die, etc., and the energization and heat transfer are uniform, and the uniform sintering can be achieved. SOLUTION: In a forming die 1 for electric sintering having a hollow portion 6 of prismatic section to charge a powder material, the forming die 1 comprises an outer frame 2 and a forming die 3 to be inserted in an opening part 5 of circular section which pierces the outer frame 2 in the vertical direction and is tapered from an upper part to a lower part, the forming die 3 comprises split dies 4 of the same number as the corner number of the hollow portion 6 of the prismatic section, each split die 4 of the sectional shape that one end arch-like portion comprising an arc-like portion and a chord-like portion 8 is notched, and the hollow portion 6 of prismatic section is formed at the chord- like portion 8 by inserting and connecting each split die 4 in the opening part 5 of the outer frame 2 in the horizontal section in the same direction clockwise or counterclockwise.

9. 发明专利

JPH09150933A TRANSFER SCREW BLADE 失效
公开(公告)号：JPH09150933A
公开(公告)日：1997-06-10
申请号：JP33808295
申请日：1995-11-30
申请人： SUMITOMO COAL MINING
发明人： AKASHI TAMOTSU , MAKI KOJI , TANI MASAHITO , ANDO HIDEO
IPC分类号： B65G33/26 , B04B1/20
摘要： PROBLEM TO BE SOLVED: To increase the strength of adhesion by welding to a blade tip surface by forming a wearing resistant material fixed to the tip part of a transfer screw blade in such a manner that a wear resistant layer having a small metallic coupling phase amount in a cemented carbide laminated in a vertical direction and a weldable layer having a large metallic coupling phase amount are sintered and joined together. SOLUTION: In a transfer screw suitably used for a decanter type centrifugal separator, in a transfer screw blade 3 in which a wear resistant material 7 is fixed to the tip surface 4 of thereof, the wear resistant material 7 is fixed by using a cemented carbide type wear resistant layer 7a having a metallic coupling phase amount of 2 to 105 by weight laminated in a direction vertical to a plate-like bottom surface and a cemented carbide type weldable later 7b having a metallic coupling phase amount of 15 to 40% by weight and joining these two layers by direct sintered joining and/or indirect joining via a middle layer 7c provided between the two layers. In the weldable cemented carbide type weldable layer 7b, the layers are adhered to the tip surface 4 of the transfer screw blade 3 in series by direct welding.

10. 发明专利

JPH09300104A COMPLEX TOOL MATERIAL OF SUPER-HARD ALLOY SYSTEM 失效
公开(公告)号：JPH09300104A
公开(公告)日：1997-11-25
申请号：JP14076896
申请日：1996-05-10
申请人： SUMITOMO COAL MINING
发明人： AKASHI TAMOTSU , MAKI KOJI , TANI MASAHITO , ANDO HIDEO
IPC分类号： B23B27/14 , C22C29/08
摘要： PROBLEM TO BE SOLVED: To assure a melt aligning characteristic with steel and increase a connecting force by a method wherein super-hard alloy having a large amount of metal coupling phase is arranged at a part contacting with steel and super- hard alloy having high anti-wearing characteristic is contacted with weldable super-hard alloy directly or through an intermediate layer. SOLUTION: In a complex tool of super-hard alloy system in which a substrate section 2 and a pre-sintered and formed super-hard alloy are connected to each other, super-hard alloy is comprised of an anti-wear layer 1a of 3wt.% or more of metallic coupling phase amount and 20wt.% or less and a weldable layer 1b of 20wt.% or more of metallic coupling phase and 60wt.% or less, wherein the anti-wear layer 1a and the weldable layer 1b are integrally and directly sintered and connected or through the intermediate layer 1c, and further the weldable layer 1b and the substrate section 2 are dispersed and connected to each other, thereby they are forcedly connected to the substrate section 2.

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