METHOD FOR PRODUCING ALUMINUM ALLOY EXTRUDED MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide a method for producing an aluminum alloy extruded material by which the extruded material can be stably bent into the same shape, and the extruded material can be given desired proof stress without fluctuation by giving heat history equivalent to coating/baking to the extruded material. SOLUTION: The method for producing the extruded material of aluminum alloy at least includes: a step S12 of subjecting the ingot of aluminum alloy at least containing magnesium and silicon to solution treatment; a step S13 of subjecting the ingot to extrusion molding into an extruded material; and a step S16 of subjecting the extruded material to preaging treatment under prescribed set heating temperature conditions, the production method further includes between the extrusion molding step S13 and the preaging treatment step S16: a step S14 of measuring the proof stress of the extruded material; and a step S15 of setting the above heating temperature conditions based on the measured proof stress. COPYRIGHT: (C)2008,JPO&INPIT