METHOD FOR PRODUCING EXTRUDED MULTI-HOLE PIPE

In a method of manufacturing an extruded, multi-hole-pipe (1), an ingot is prepared having a chemical composition that contains one or two or more elements from among Si: 2.0 mass% or less, Fe: 0.6 mass% or less, Cu: 0.6 mass% or less, Mn: 2.0 mass% or less, Mg: 0.4 mass% or less, Cr: 0.1 mass% or l...

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Bibliographische Detailangaben
Hauptverfasser:	SUZUKI, Taichi, TOMORI, Ryo
Format:	Patent
Sprache:	eng ; fre ; ger
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 DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OFGENERAL APPLICATION FERROUS OR NON-FERROUS ALLOYS HEAT EXCHANGE IN GENERAL HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS,IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT HEATING 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:	In a method of manufacturing an extruded, multi-hole-pipe (1), an ingot is prepared having a chemical composition that contains one or two or more elements from among Si: 2.0 mass% or less, Fe: 0.6 mass% or less, Cu: 0.6 mass% or less, Mn: 2.0 mass% or less, Mg: 0.4 mass% or less, Cr: 0.1 mass% or less, Zn: 1.5 mass% or less, Ti: 0.1 mass% or less, and B: 0.1 mass% or less, the remainder being composed of Al and unavoidable impurities, wherein the total of the Si content and the Mn content is 3.2 mass% or less, and the Si content is less than the Mn content. After a first homogenizing process has been performed by holding the ingot at a temperature of 550°C to 650°C for 2 h or more, a second homogenizing process is performed by holding the ingot at a temperature of 450°C to 540°C for 3 h or more. Subsequently, hot extrusion is performed on the ingot.