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    METHOD FOR HARDFACING A METAL SURFACE
    61.
    发明授权
    METHOD FOR HARDFACING A METAL SURFACE 失效
    申请的程序磨损硬质合金PADS在金属表面上

    公开(公告)号：EP0942797B1

    公开(公告)日：2000-05-03

    申请号：EP97940100.7

    申请日：1997-08-21

    Applicant: DEERE & COMPANY

    Inventor： REVANKAR, Gopal, S.

    IPC: B22F7/04 ,  B22F3/22 ,  C23C24/08 ,  C23C26/00

    CPC classification number: C23C26/02 ,  B22F7/04 ,  C23C24/08

    Abstract: A wear-resistant hardfacing and a method for applying such a hardfacing is taught herein. A finely powdered, wear-resistant alloy and a polyvinyl alcohol (PVA) solution slurry is coated onto the metal surface of a tool, implement, or similar item to be hardfaced. Alternatively, a binding coating of PVA solution may be applied to the metal surface followed by application of a layer of a powdered alloy. After the slurry or PVA binding coating has dried, leaving a dry coat of alloy in a PVA matrix, the metal surface is heated to the fusion temperature of the alloy in vacuum, in an inert gas atmosphere, or in hydrogen atmosphere. The metal item with the fused coating is heat treated to impart desired mechanical properties to the part substrate material. The method of the present invention gives a smooth, dense coating of the wear-resistant hardfacing without nonmetallic inclusions.

    A method of controlling the densification behavior of a metalllic feature in a ceramic material
    65.
    发明公开
    A method of controlling the densification behavior of a metalllic feature in a ceramic material 失效
    Verfahren zur Kontrolle des Verdichtungsverhaltens eines metallischen Anteils in einem keramischen Material。

    公开(公告)号：EP0595745A2

    公开(公告)日：1994-05-04

    申请号：EP93480128.3

    申请日：1993-09-10

    Applicant: International Business Machines Corporation

    Inventor： Bezama, Raschid Jose ,  Wall, Ronald Rene

    IPC: C04B35/64 ,  B22F7/04 ,  H05K3/40 ,  H05K3/46

    CPC classification number: C04B35/74 ,  C04B38/068 ,  C04B38/0058

    Abstract: Disclosed is a method of controlling the densification behavior of a metallic feature in a ceramic material, the method including the steps of:
       obtaining an unsintered ceramic material (12) having at least one metallic feature (14) therein;
       providing at least the metallic feature with a predetermined amount of carbonaceous material;
       heating the ceramic material and metallic feature to a predetermined temperature sufficient to cause sintering of the ceramic material, the metallic feature being at least partially inhibited from densifying at the predetermined temperature by the presence of the carbonaceous material.
    A key aspect of the invention is subsequently removing with an oxidizing ambient some or all of the carbonaceous residue at a predetermined temperature for the optimization of the physical characterization of the fired metallic component in ceramic material without adversely affecting distortion and alignment of the metallic feature.

    Abstract translation: 公开了一种控制陶瓷材料中的金属特征的致密化行为的方法，该方法包括以下步骤：获得其中具有至少一个金属特征（14）的未烧结陶瓷材料（12）; 至少提供具有预定量的碳质材料的金属特征; 将陶瓷材料和金属特征加热到足以引起陶瓷材料烧结的预定温度，金属特征至少部分地被预定温度下的碳质材料的抑制致密化。 本发明的一个关键方面随后在氧化环境中将预定温度下的一些或全部碳质残渣除去，以优化陶瓷材料中烧制的金属组分的物理表征，而不会不利地影响金属特征的变形和对准。

    TREATMENT OF METALS FOR COATING OR ACTIVATION
    67.
    发明公开
    TREATMENT OF METALS FOR COATING OR ACTIVATION 失效
    金属处理涂层或活化

    公开(公告)号：EP0500651A4

    公开(公告)日：1993-10-20

    申请号：EP90916588

    申请日：1990-09-13

    Applicant: ALLOY SURFACES COMPANY, INC.

    Inventor： BALDI, ALFONSO, L.

    IPC: B22F7/04 ,  B01J25/00 ,  B22F1/00 ,  B22F7/00 ,  B22F9/16 ,  B64C1/00 ,  C06B45/14 ,  C23C24/08 ,  C23C26/00 ,  F41H11/02 ,  F42B12/70

    CPC classification number: C06B45/14 ,  B01J25/00 ,  B22F7/002 ,  B22F9/16 ,  C23C26/00 ,  H05K2201/0209 ,  Y02T50/67

    Abstract: Coating with high-melting metals can be simplified by alloying high-melting metal with sufficient aluminum to make low-melting alloy that is applied, bonded in place, and then subjected to the leaching out of some or most of the aluminum. The resulting surface is porous and will receive and hold top coatings as from spraying nozzles (12). Leached surface can be pyrophoric and top coating can be exothermically combustible. Pyrophoric powder can also be coated on boron or carbon fibers or sintered with combustible particles. Porosity can be created by subjecting workpiece to diffusion conditions in contact with depleting material such as powdered nickel or high-nickel aluminides or cobalt or high-cobalt aluminides. Aluminum particles can be electrophoretically deposited on foil and then diffused in. Leaching aluminum out with caustic is improved when a little H2O2 is present in the caustic in the leach tank (22). Subsequent treatment of the leached surface with weak acid further improves pyrophoricity, and folding of the pyrophoric member extends its pyrophorically-generated high temperature dwell. Resin foil containing pyrophoric particles makes effective decoy.

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