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1. 发明专利

JPH09213153A CONTACT MATERIAL FOR VACUUM BREAKER AND MANUFACTURE OF CONTACT MATERIAL 失效
公开(公告)号：JPH09213153A
公开(公告)日：1997-08-15
申请号：JP2074296
申请日：1996-02-07
申请人： SHIBAFU ENG KK , TOSHIBA CORP
发明人： OKUTOMI ISAO , SEKIGUCHI SHIGEAKI , SEKI KEISEI , KUSANO TAKASHI , YAMAMOTO ATSUSHI
IPC分类号： H01H1/025 , H01H1/02 , H01H11/04
摘要： PROBLEM TO BE SOLVED: To provide a contact material for vacuum breaker, which can stabilize the fusion-resistant and non-consumable characteristics and excels in the breaking performance. SOLUTION: This contact material for a vacuum breaker is composed of a high conductive component containing either or both of Cu and Ag, an arc resistance component having particle sizes between 0.1-150μm and containing Cr in at least 90vol.% of the whole contents, and the first auxiliary component having particle sizes between 0.1-150μm and containing either or both of Al and Si, and these are mixed together uniformly to prepare a mixture powder, and the relative density is made over 88%.

2. 发明专利

JPH09198975A VACUUM VALVE AND CONTACT POINT FOR VACUUM VALVE 失效
公开(公告)号：JPH09198975A
公开(公告)日：1997-07-31
申请号：JP495696
申请日：1996-01-16
申请人： SHIBAFU ENG KK , TOSHIBA CORP
发明人： OKUTOMI ISAO , KUSANO TAKASHI , SEKI KEISEI , YAMAMOTO ATSUSHI , SEKIGUCHI SHIGEAKI
IPC分类号： H01H33/66
摘要： PROBLEM TO BE SOLVED: To improve cutoff performance by providing a discontinuous portion in the composition change of components at least at one (r) section when the relation y=f(r) is satisfied between the component quantity (y) of the arc- resistant component and the distance (r) from the contact point center. SOLUTION: Contact points for a vacuum valve with the radius R having the same component composition for the same radius contain the conductive component, arc-resistant component, and auxiliary component as required. When the relation y=f(r) is satisfied between the component quantity y(0

3. 发明专利

JPH10265808A PRODUCTION OF HEAT TREATING VESSEL, CONTACT POINT ALLOY 失效
公开(公告)号：JPH10265808A
公开(公告)日：1998-10-06
申请号：JP7348697
申请日：1997-03-26
申请人： SHIBAFU ENG KK , TOSHIBA ELECTRONIC ENG , TOSHIBA CORP
发明人： OKUTOMI ISAO , SEKIGUCHI SHIGEAKI , KUSANO TAKASHI , YAMAMOTO ATSUSHI , SEKI KEISEI
IPC分类号： B22F3/10 , C22C1/04 , H01H1/02 , H01H11/04 , H01H33/66
摘要： PROBLEM TO BE SOLVED: To obtain a contact point alloy having stable large current shutting-off performance and more particularly restrike suppression characteristic by specifying the average surface roughness of at least either of the open surface and cap of a vessel constituting a heat treating vessel. SOLUTION: The average surface roughness of at least either of the open surface end of the heat treating vessel and the cap facing the open surface end is specified to 5 to 25 μm (Rmax.). As a result, the self-adjustment of the quality and pressure of the inside of the vessel and the external atmosphere at the time of a heat treatment through the vent path on the surface of the heat treating vessel or the cap while executing the ventilating and hermetic sealing to the atmospheric state desirable for the heat treatment is made possible and the fluctuations in the compd. ratios based on the excessive selective evaporation splashing of the high vapor pressure component in the contact point alloy are eliminated. The contact point alloy component ratios after the heat treatment are this kept constant. Any one among metallic Cr, Cr carbide, Cr oxide, Al oxide and Ti oxide is preferably arranged in at least one part of the vessel and the cap.

4. 发明专利

JPH10245652A CONTACT MATERIAL 失效
公开(公告)号：JPH10245652A
公开(公告)日：1998-09-14
申请号：JP5290197
申请日：1997-03-07
申请人： SHIBAFU ENG KK , TOSHIBA ELECTRONIC ENG , TOSHIBA CORP
发明人： OKUTOMI ISAO , SEKIGUCHI SHIGEAKI , YAMAMOTO ATSUSHI , SEKI KEISEI
IPC分类号： C22C1/05 , C22C27/04 , C22C29/08 , H01H1/02 , H01H1/021 , H01H33/66
摘要： PROBLEM TO BE SOLVED: To provide a reliable contact material. SOLUTION: In a contact material composed of a silver-tungsten carbide alloy contg. tungsten carbide WC having 0.1 to 6μm average grain size in the weight ratio of 55 to 70%, the equivalent diameter is regulated to 0.01 to 5μm, and furthermore, carbon C in a non-solid solution state or in a non-compound forming state is present in the weight ratio of 0.005 to 0.2%. The breaking performance of the contact material can be improved.

5. 发明专利

JPH09231880A MANUFACTURE OF VACUUM VALVE CONTACT 失效
公开(公告)号：JPH09231880A
公开(公告)日：1997-09-05
申请号：JP3153096
申请日：1996-02-20
申请人： SHIBAFU ENG KK , TOSHIBA CORP
发明人： OKUTOMI ISAO , SEKIGUCHI SHIGEAKI , MINAMI YOSHIKO , SEKI KEISEI , YAMAMOTO ATSUSHI , KUSANO TAKASHI
IPC分类号： H01H33/66
摘要： PROBLEM TO BE SOLVED: To provide a manufacturing method for a vacuum valve contact with a improved breaking characteristic and restrike characteristic by optimizing the mixing of raw material powder. SOLUTION: The manufacturing process of a vacuum valve contact has a first process for weighing the conducting component comprising at least one of Ag and Cu and an arc resistant component comprising at least one of Ti, Zr, Hf, Nb, Ta, Cr, Mo, and W in the prescribed ratio, a second process for introducing the conductive component and the arc resistant component into an agitating container capable of performing rocking motion, and a third process for superimposing the rocking motion of the agitating container on the agitating motion by agitating mechanism built in the agitating container, and obtaining a mixture of the conductive component powder and the arc resistant component powder by pulverizing, dispersing and mixing them.

6. 发明专利

JPH10199379A CONTACT MATERIAL FOR VACUUM BREAKER 失效
公开(公告)号：JPH10199379A
公开(公告)日：1998-07-31
申请号：JP378997
申请日：1997-01-13
申请人： SHIBAFU ENG KK , TOSHIBA ELECTRONIC ENG , TOSHIBA CORP
发明人： OKUTOMI ISAO , OSHIMA IWAO , SEKIGUCHI SHIGEAKI , YAMAMOTO ATSUSHI , OSABE KIYOSHI , SEKI KEISEI , KUSANO TAKASHI
IPC分类号： H01H33/66 , H01H1/02
摘要： PROBLEM TO BE SOLVED: To maintain basic three characteristics, namely, fusion resistance, voltage resistance, and breaking at a certain level, and obtain superior arc consumption resistance characteristics and re-arc characteristics by integrating WMO in Cu alloy in which a specific average particle size of W and Mo and a specific rate is contained and specifying a specific average particle size. SOLUTION: W of 0.4 to 6 micrometers in average particle size is 74 to 88wt.%, Mo of 0.4 to 4 micrometers in average particle size is 0.001 to 5wt.%, and the remaining part is Cu. Due to this quantity containing W, a required high hardness and high fusion property are obtained without lowering conductivity, re-arc generation frequency, breaking characteristics, static pressure resistance characteristics are obtained in this average particle size of W, and the average particle size of WMo particles is less distorted. Mo of this contained quantity is integrated as an auxiliary component of W, and wetting property with W and Cu is improved, the average particle size of WMo particle is 0.4 to 10 micrometers, and thereby radiation of micro-metal particles and surface coarseness are reduced in the case of a single component. This alloy may contain Mo and Fe. This manufacture is by invasion method or sintering method or the like.

7. 发明专利

JPH05230565A LONG LIFE CONTACT MATERIAL 失效
公开(公告)号：JPH05230565A
公开(公告)日：1993-09-07
申请号：JP3092892
申请日：1992-02-18
申请人： TOSHIBA CORP
发明人： MAJIMA YOSHIKO , SEKIGUCHI SHIGEAKI
IPC分类号： C22C1/04 , C22C1/10 , C22C9/00 , H01H1/02 , H01H1/023 , H01H1/025 , H01H11/04 , H01H33/66
摘要： PURPOSE:To provide a long life contact material less in deposition and consumption even when high-frequently turning ON/OFF operations are performed and also capable of simplifying the maintenance of electrical equipment having a contact. CONSTITUTION:This long life contact material is a long life contact material formed by impregnating the pores of a sintered compact, which consists of a highly electrically conductive component consisting of Cu and/or Ag, at least one arc resisting component selected from W, Mo, Ti, Cr, Ta, Nb, Zr, and compounds thereof, and TiB2 or Al2O3, with the highly electrically conductive component further. The content of the highly electrically conductive component is regulated to 20-45wt.%, and further, the content of the arc resisting component and the content of TiB2 or Al2O3 are regulated to 55-80wt.% and 0.1-5wt.%, respectively.

8. 发明专利

JPH03108224A CONTACT MATERIAL VACUUM VALVE 失效
公开(公告)号：JPH03108224A
公开(公告)日：1991-05-08
申请号：JP24335189
申请日：1989-09-21
申请人： TOSHIBA CORP
发明人： OKUTOMI ISAO , YAMAMOTO ATSUSHI , SEKI KEISEI , CHIBA SEIJI , SEKIGUCHI SHIGEAKI
IPC分类号： H01H33/66
摘要： PURPOSE:To concurrently obtain the excellent low current cutting characteristic and the high-frequency arc extinguishing characteristic by optimizing the content, ratio and existing state of Ag and Cu, and further atomizing the organization of a contact material. CONSTITUTION:A contact material for a vacuum valve is the Ag-Cu-Cr3C2 contact material for a vacuum valve containing a high conducting component of Ag and Cr and an arc-resistant component of Cr3C2, the content of the high conducting component is set as follows: the total quantity of Ag and Cr 40-80wt.%, the ratio of Ag in the total quantity of Ag and Cu 40-80wt.%, and the content of the arc-resistant component 20-60wt.%. The organization of the contact material is constituted of the matrix of the high conducting component, the discontinuous phase with the thickness or width 5mum or below, and discontinuous grains of Cr3C2 10mum. or below, and the discontinuous phase of the high conducting component is finely and uniformly distributed in the matrix at the interval 5mum or below.

9. 发明专利

JPH0254819A CONTACT MATERIAL FOR VACUUM VALVE 失效
公开(公告)号：JPH0254819A
公开(公告)日：1990-02-23
申请号：JP20596588
申请日：1988-08-19
申请人： TOSHIBA CORP
发明人： OKUTOMI ISAO , YAMAMOTO ATSUSHI , CHIBA SEIJI , SEKIGUCHI SHIGEAKI , OKAWA MIKIO , HONMA MITSUTAKA , OTOBE KIYOBUMI , SATO TAKANARI , SEKI KEISEI
IPC分类号： H01H33/66 , H01H1/02 , H01H1/0233
摘要： PURPOSE:To provide both a low cutting current characteristic and a high frequency arc-extinguishing characteristic by having a content of Ag and Cu, contact materials of Ag-Cu-WC system, and that of WC, and also structure of the contact materials defined respectively. CONSTITUTION:In a contact material for an Ag-Cu-WC system vacuum valve, Ag and Cu of high conductive components and WC of an anti-arc component are included. For a content of high conductive components, that of Ag+Cu is defined as 25 to 65wt.%, while that of Ag/(Ag+Cu) defined as 40 to 80wt.%. Also, a content of an anti-arc compound is defined as 35 to 75wt.%. Further, structure of the contact material is composed of a matrix of high conductive component and a discontinuous phase of thickness or of width of 5 micrometer or less, and of a discontinuous grain of an anti-arc component of 1 micrometer or less, the discontinuous phase of the high conductive component being dispersed in the matrix finely and homogeneously at an interval of 5 micrometer or less. In the structure as mentioned above, both a low cutting current characteristic and a high frequency arc-extinguishing characteristic can be provided.

10. 发明专利

JPS6396203A PRODUCTION OF METALLIC MEMBER 失效
公开(公告)号：JPS6396203A
公开(公告)日：1988-04-27
申请号：JP24137986
申请日：1986-10-13
申请人： TOSHIBA CORP
发明人： SEKIGUCHI SHIGEAKI , OKUTOMI ISAO
IPC分类号： C21D1/00 , B22F3/10 , B22F3/26 , C22F1/00
摘要： PURPOSE:To easily obtain a good metallic member with good workability by inserting a fibrous ceramic between a heat treatment jig and the metallic member at the time of housing the metallic member into the heat treatment jig and subjecting the member to a heat treatment. CONSTITUTION:A woven and knitted member consisting of fibrous ceramics is interposed between the heat treatment jig and the metallic member at the time of housing the metallic member into the heat treatment jig and subjecting the member to the heat treatment such as sintering or infiltration. The heat treatment jig has a boat- or plate shape and contains carbon. The metallic member is a member contg. at least one kind among Fe, Mo, W, V, Nb, Ta, Ti, Zr, Ni and Co and having carbide formability. The fibrous ceramics is preferably composed essentially of Al2O3 and/or SiO2. The reaction and wetting of the metallic member with the heat treatment jig at the time of the heat treatment are thereby prevented and the good metallic member is obtd.

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