PRODUCTION OF WEAR RESISTANT ALLUMINUM ALLOY EXTRUDATE

PURPOSE:To obtain an Al alloy extrudate having excellent wear resistance, machineability, high-temp. strength and workability by casting a high-silicon Al alloy to a billet and extruding the billet at the specified billet temp., extrusion ram speed and extrusion ratio. CONSTITUTION:A high-silicon Al...

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Bibliographische Detailangaben
1. Verfasser:	IWAI ICHIROU
Format:	Patent
Sprache:	eng
Schlagworte:	ALLOYS AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKINGWITHOUT ESSENTIALLY REMOVING MATERIAL BLASTING CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS CHEMISTRY FERROUS OR NON-FERROUS ALLOYS HEATING INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES ORMATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHERTHAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUSSUBCLASSES OF CLASSES F01-F04 LIGHTING MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES,OTHERWISE THAN BY ROLLING MECHANICAL ENGINEERING MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL METALLURGY PERFORMING OPERATIONS PUNCHING METAL TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS WEAPONS
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Beschreibung
Zusammenfassung:	PURPOSE:To obtain an Al alloy extrudate having excellent wear resistance, machineability, high-temp. strength and workability by casting a high-silicon Al alloy to a billet and extruding the billet at the specified billet temp., extrusion ram speed and extrusion ratio. CONSTITUTION:A high-silicon Al alloy contg. Si in the hypereutectic region, for example, an alloy consisting of 12-30% Si, 0.3-7.0% Cu and the balance Al is cast to a billet. Such billet is extruded under the conditions of 350-420 deg.C billet temp., 0.03-0.2m/min extrusion ram speed and 10-40 extrusion ratio. A die having about 5-15mm. bearing length is preferably used for the extrusion die. The primary and eutectic Si particles in the casting ingot are thus fined to a desired grain size range and the Al alloy extrudate with which excellent wear resistance, machineability, etc. are assured is obtd.