HOT EXTRUSION OF METALS

1,198,774. Extruding. HENRY WIGGIN & CO. Ltd. 9 Feb., 1968 [24 Feb., 1967], No. 6582/68. Heading B3P. In the hot extrusion of a cylindrical billet of metal whose melting point exceeds 1250‹ C. such as steel, nickel or nickel base alloys, a fibrous extrusion lubricant is used whose fibres are all...

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Bibliographische Detailangaben
Hauptverfasser:	ROBERT R. CLAPPIER, EWAN C. MACQUEEN
Format:	Patent
Sprache:	eng
Schlagworte:	AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKINGWITHOUT ESSENTIALLY REMOVING MATERIAL BASIC ELECTRIC ELEMENTS ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR ELECTRICITY MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES,OTHERWISE THAN BY ROLLING MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL PERFORMING OPERATIONS PUNCHING METAL ROLLING OF METAL SEMICONDUCTOR DEVICES TRANSPORTING
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Zusammenfassung:	1,198,774. Extruding. HENRY WIGGIN & CO. Ltd. 9 Feb., 1968 [24 Feb., 1967], No. 6582/68. Heading B3P. In the hot extrusion of a cylindrical billet of metal whose melting point exceeds 1250‹ C. such as steel, nickel or nickel base alloys, a fibrous extrusion lubricant is used whose fibres are all of mineral wool. The wool may be derived from natural rocks or may be slag wool ; it is preferably coated or impregnated with a halide or carbonate of an alkali or alkaline earth metal, e.g. barium chloride, lithium chloride, lithium carbonate, cryolite, or sodium carbonate acting as a fluxing agent. The flux may be mixed with water to form a slurry which is coated on a pad of mineral wool. A thin sheet of the lubricant or a thin sheet of glass also may be interposed between the billet and the cylindrical container wall. When extruding a hollow billet, glass powder may be placed in the bore of the billet. Specific examples are given for extruding nickelchromium steel and alloy.