摘要:
In accordance with the invention, a metal substrate (10) is coated with a multilayer surface finish (11) comprising, in succession, an amorphous metal underlayer (12) a corrosion-resistent metal middle layer (13) and one or more outer layers of precious metal (14). In an exemplary embodiment the metal substrate comprises copper alloy, the amorphous metal underlayer is Ni-P, the middle layer is nickel and the outer layer is palladium. The resulting structure is particularly useful as an electrical connector.
摘要:
In accordance with the invention, a metal substrate (10) is coated with a multilayer surface finish (11) comprising, in succession, an amorphous metal underlayer (12) a corrosion-resistent metal middle layer (13) and one or more outer layers of precious metal (14). In an exemplary embodiment the metal substrate comprises copper alloy, the amorphous metal underlayer is Ni-P, the middle layer is nickel and the outer layer is palladium. The resulting structure is particularly useful as an electrical connector.
摘要:
Thin-walled bearings (10) each including a layer (16) of an aluminium based, or copper based, bearing material bonded to a steel shell, has an overlay (20) of one or more of the elements lead, tin, indium, copper, nickel, zinc and antimony. A flash (24) less than two micrometres thick and of one or more of the elements iron, chromium, nickel, cobalt, gold, silver and copper, is provided in any convenient way on the initially unmodified exposed surface portion of the overlay. The flash (24) is caused to react with the, or at least one constituent, element of the overlay (20) to modify the surface portion (22) of the overlay to become hard and wear-resistant. The material of the flash (24) forms at least one intermetallic compound, and/or solid solution, with the material of the surface portion (22) of the overlay (20). The bearing may be heated to a temperature at which the flash (24) reacts with the overlay (20) to form the required intermetallic compound, and/or solid solution, at a desired rate.
摘要:
A multi-layer engine bearing (26) includes a steel backing (36) having a liner (38) of bearing metal of either copper-lead or aluminum alloys formed on the backing (36) and a thin layer (44) of either copper or nickel plated on the liner (38) to define a base lining member (40) of the bearing (26). A multi-layer overplate (46) is formed on the base lining member (40) and includes an underlayer (48) of a lead-tin-copper alloy having a thickness of about 10 νm and an overlayer (50) of tin having a thickness of about 5 νm. The multi-layer overplate (46) exhibits exceptional fatigue resistance under high dynamic loading conditions and retains good conformability and embedibility characteristics.
摘要:
The composite barrel for use in extrusion or injection moulding, includes an outer housing having a cylindrical bore extending the length of the outer housing, with a wear-resistant lining on the interior surface. The lining is fabricated from an alloy that includes a base metal (nickel and/or cobalt) and phosphorus in an amount of 0.5 to 12% by weight, and optionally abrasion-resistant particulate, such as tungsten carbide. The alloy is typically applied by centrifugal casting and can be cast in a nitrogen-rich atmosphere without creating undesirable lining porosity. Such linings can be made for a fraction of the cost of comparable linings that must be cast under vacuum or in an atmosphere of argon.
摘要:
A clad material (10) is constructed such that a metallic lath sheet (3) is laminated on a base metal layer (1), a covering metal layer (4) is laminated on the metallic lath sheet (3) on a side opposite to the base metal layer (1), and these base metal layer (1), metallic lath sheet (3) and the covering metal layer (4) are integrally bonded together. The metallic lath sheet (3) is used, in which a metallic sheet having a plurality of cuts formed throughout in a zigzag manner and extending therethrough in a direction of sheet thickness is deformed in a direction crossing the direction of formation of the cuts and meshes are formed by opening the cuts in the direction of deformation.
摘要:
A method of manufacturing a clad material effective for small electronics such as an anode case and a cathode case for a button type micro cell which is comparatively small in plate thickness and requires deep drawing, comprising, in addition to the conventional method of manufacturing clad materials, the steps of a cold rolling at a draft of 30 % or less so as to enable a reduction in a difference between r values (Lankford value) showing plastic anisotropies of the clad material in a rolling joining direction and a direction having a specified angle relative to the rolling joining direction, whereby the mechanical strength of the clad material is substantially increased and the clad material less in drawing anisotropy can be provided on a mass-production scale.
摘要:
The present invention, which is aimed at providing a method for manufacturing a clad material that can be used for the anode cases and cathode cases of button-type microbatteries and other miniature electronic devices requiring the use of comparatively thin, drawable sheets, allows the difference between r values, or Lankford values (which characterize the plastic anisotropy between the rolling/bonding direction of a clad material and a direction at a prescribed angle to the rolling/bonding direction) to be reduced by performing cold rolling at a rolling reduction of 30% or lower in addition to performing a conventional method for manufacturing a clad material, making it possible to substantially enhance the mechanical strength of the clad material and to mass-produce clad materials that have low reduction anisotropy.
摘要:
A technique for producing soldering iron tips entails cutting clad wire into a plurality of segments, each segment comprising a core of material (such as copper) and an outer protective layer (such as stainless steel, Ni, Cr, or alloy thereof). Each clad wire segment is then shaped into a soldering iron tip by a cold or hot heading process, or other metal forming process. In the finished tip, the protective outer layer is disposed behind the working area of the tip, and serves to reduce the corrosion of the tip, and to improve the electrical conductivity between the tip and the soldering iron handle. A heater element can be formed at one end of the soldering iron tip from the same clad wire segment used to produce the tip itself, thereby ensuring good thermal transfer properties between the heater element and the tip. The invention also pertains to a technique for forming a protective outer layer on the working area of the tip. The technique comprises stamping caps from a thin strip or sheet of protective material, such as iron. More specifically, the caps are stamped out of the sheet using a die having a shape which resembles the shape of the working area of the soldering tip. The caps formed in this manner are then inserted over the ends of the tips, and attached thereto by applying brazing material to the formed cap or to the strip of material prior to forming the cap.
摘要:
Bei einem Verfahren zum Herstellen einer Brennstoffeinspritzdüse für einen Dieselmotor, insbesondere einen Zweitakt-Grossdieselmotor, die eine Längsbohrung (3) zum Führen einer Düsennadel (4) und zum Einbringen von Brennstoff aufweist, welche Längsbohrung (3) sich bis in einen Düsenkopf (6) erstreckt, wo mindestens eine Düsenlochbohrung (61) von der Längsbohrung (3) ausgeht, sowie einen in der Längsbohrung (3) angeordneten Nadelsitz (5) zum Zusammenwirken mit der Düsennadel (4), wird zunächst ein einstückiger Grundkörper (2), der zumindest die Längsbohrung (3), den Nadelsitz (5) und den Düsenkopf (6) umfasst, aus einem härtbaren Werkstoff, insbesondere einem Vergütungsstahl, im ungehärteten Zustand und im wesentlichen in der gewünschten äusseren Endform hergestellt. Anschliessend wird eine Beschichtung (7) aus einer heisskorrosionsbeständigen Legierung auf den Düsenkopf (6) aufgebracht, danach wird die Düsenlochbohrung (61) hergestellt, und dann wird der Grundkörper (2) gehärtet. Ferner wird ein Brennstoffeinspritzventil für einen Dieselmotor vorgeschlagen.