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    CEMENTED CARBIDE AND ITS PRODUCTION
    1.
    发明专利
    CEMENTED CARBIDE AND ITS PRODUCTION 失效

    公开(公告)号：JP2000219931A

    公开(公告)日：2000-08-08

    申请号：JP2000022971

    申请日：2000-01-31

    Applicant: SECO TOOLS AB

    Inventor： JANSSON BO ,  QVICK JAN

    IPC: C22C29/08 ,  C22C38/10

    Abstract: PROBLEM TO BE SOLVED: To provide a hard material based on submicron WC in a bonding phase having hardenability. SOLUTION: In cemented carbide in which a bonding phase having hardenability is incorporated with 50 to 90 mass % submicron WC, the bonding phase is composed of Fe, 10 to 60 mass % Co,

    MANUFACTURE OF SUBMICRON CEMENTED CARBIDE TOOL INSERT
    2.
    发明专利
    MANUFACTURE OF SUBMICRON CEMENTED CARBIDE TOOL INSERT 失效

    公开(公告)号：JPH11286734A

    公开(公告)日：1999-10-19

    申请号：JP4107099

    申请日：1999-02-19

    Applicant: SECO TOOLS AB

    Inventor： QVICK JAN ,  JANSSON BO

    IPC: B23B27/14 ,  B22F3/02 ,  B23P15/28 ,  C22C1/05 ,  C22C29/08

    Abstract: PROBLEM TO BE SOLVED: To provide a method for manufacturing a submicron cemented carbide cutting tool insert consisting of tungsten carbide and cobalt by the conventional process comprising a stage of subjecting a powder mixture of WC, Co, and a conventional grain growth inhibitor to wet-kneading to form a slurry, a stage of drying the slurry into powder, a stage of subjecting the powder to uniaxial pressing in a pressing tool to form an article of desired shape, and finally a stage of sintering. SOLUTION: At the time of the sintering stage, a cemented carbide insert of this kind tends to shrink usually in a direction parallel to the pressing direction rather than in a direction perpendicular to the pressing direction. As the result, the pressing requires a special tool or requires, after sintering of the insert, long-time grinding which causes a raise in manufacturing costs. In this method, with respect to a cemented carbide of 7.5 to 25 wt.% Co content, such defect can be removed by using a WC powder having an FSSS grain size dWC of less than 1 μm and a Co powder having an FSSS grain size dCo satisfying the condition that the value of dWC/dCo becomes 0.75-1.5.

    COATED CUTTING TOOL INSERT FORMED OF CEMENTED CARBIDE AND COATED FILM
    3.
    发明专利
    COATED CUTTING TOOL INSERT FORMED OF CEMENTED CARBIDE AND COATED FILM 审中-公开

    公开(公告)号：JP2003205406A

    公开(公告)日：2003-07-22

    申请号：JP2002344074

    申请日：2002-11-27

    Applicant: SECO TOOLS AB

    Inventor： ZACKRISSON JENNI ,  QVICK JAN

    IPC: B23B27/14 ,  C22C29/08 ,  C23C14/06 ,  C23C14/16 ,  C23C16/30 ,  C23C30/00

    Abstract: PROBLEM TO BE SOLVED: To provide a cutting tool insert including cemented carbide base material and a coated film. SOLUTION: The cemented carbide base material includes 73-93 wt.% WC, 4-12 wt.% binder phase, and cubic carbide phase, and substantially has a surface area free from cubic carbide phase and rich in binder phase. The cubic carbide phase includes elements from 1Vb and Vb groups of the periodic system, and has the tantalum content of the level corresponding to industrial impurities. This insert demonstrates favorable blade strength and thermal shock resistance. COPYRIGHT: (C)2003,JPO

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