Abstract: A method of surfacing mill guide rolls 1 in which a metallic powder (6) is deposited on to the surface of the rotatable roll by flame, arc or plasma spraying, fusion welded and then shaped and compacted while in a plastic condition by a roll former 7 rotatable and engageable with the guide roll whereby to impart thereto a surface in conformity with the profile of the former.
Abstract: A method of continuously producing a one-side-only zinc coated ferrous metal strip initially having zinc coated on both wide surfaces, as by differentially hot-dip coating, and with the zinc on one of the wide surfaces being in the form of a thin film which is transformed into a thin zinc-iron intermetallic layer by applying heat to only the wide surface of the strip having the zinc in the form of a thin film and abrading the surface of the intermetallic layer thus formed by brushing to effect complete removal thereof, leaving the other wide surface of the strip coated with zinc.
Abstract: Zinc coated steel strip is produced by passing a strip through a molten zinc bath containing from 0.15% to 0.18% aluminum, controlling zinc coating weights to produce a relatively light coating of 0.20 oz./sq.ft. maximum on one side and a relatively heavy coating of 0.20 oz./sq.ft. minimum in the other side, and then uniformly heating both sides for a time and temperature sufficient to completely form an iron-zinc alloy on the light coated side and yet retain the essentially unalloyed zinc coating on the heavy coated side.
Abstract: Apparatus for a process of continuously casting and sizing metals by passing a metal core member through a container of molten metal to accrete and solidify the molten metal thereon, and passing the cast product through a series of pairs of counterpoised sizing rolls composed of a specific steel composition to consolidate and smooth the cast product; and a method of continuously casting and sizing metals.
Abstract: Substrate such as relatively porous, low thermally conductive materials are coated with molten lead, lead-base alloys, zinc, zinc-base alloys, tin, tin-base alloys, cadmium, cadmium-base alloys, aluminum, aluminum-base alloys and the like by spreading the molten metal by means of a low thermally conductive roll to provide products useful in sound attenuation, moisture and corrosion proofing and radiation shielding.
Type:
Grant
Filed:
June 17, 1977
Date of Patent:
June 27, 1978
Assignee:
St. Joe Minerals Corporation
Inventors:
Norman Laurence Lunn, Charles Jeffrey McCrea, Raymond David Pregaman, Lawrence Edward Turowski
Abstract: A partially alloyed galvanized ferrous strand and a method for its production. The method is characterized by the steps of immersing a clean and oxide-free ferrous strand in a molten zinc galvanizing bath to produce on the strand a coating weight of between 0.2 and 0.5 oz. per square foot. After immersion, the zinc-coated ferrous strand is heat treated and cooled to produce a galvanized coating on said ferrous strand, which coating has a duplex structure characterized by an iron-zinc intermetallic layer consisting essentially of the zeta phase, an overlay of free zinc, and an average iron content between about 2 and less than 4% by weight.
Abstract: A process and apparatus for coating a band of a composition about a medial portion of an electrical component lead or terminal, where a continuous ribbon of a coating composition is extruded onto a medial portion of a plurality of spaced discrete leads or terminals extending transversely from a carrier strip. The continuous ribbon of coating composition is festooned between adjacent pins to coat paste on the sides of the leads or terminals. The leads or terminals and festoonery are transported over a surface of a wheel to apply the coating composition to the underside of each lead or terminal. A cut-off blade removes the excess composition from the underside of the terminal pins, as the pins leave the surface of the application wheel.
Type:
Grant
Filed:
April 29, 1975
Date of Patent:
January 4, 1977
Assignee:
E. I. Du Pont de Nemours and Company
Inventors:
Ray Charles Doutrich, Richard Eugene Fry
Abstract: The improved hot dip metallizing process of this invention comprises passing the article to be metallized, such as a ferrous metal article, through a bath of a molten heavy metal, such as lead, and conducting the article therefrom through a layer of molten coating metal, such as zinc, confined in a stack-like structure of a cross-sectional area being a small fraction of the surface area of the heavy metal bath. The molten coating metal is continuously supplied to the stack, preferably through orifices or nozzles so as to remove any droplets of molten heavy metal adhering to the surface of the article, thereby causing metallizing of the article and continuous overflow of excess molten coating metal at the top of the stack. Before hot blasting the coated metallic article it may be passed through mechanical removal means, such as counterrotating rollers to remove the major part of excess coating metal, while the remainder is removed by hot blasting.