ALUMINUM ALLOY BAR, ALUMINUM ALLOY BLANK FOR FORGING, METHOD FOR MANUFACTURING ALUMINUM ALLOY BAR, METHOD FOR MANUFACTURING ALUMINUM ALLOY BAR FOR FORGING, METHOD FOR MANUFACTURING ALUMINUM ALLOY BLANK FOR FORGING, MANUFACTURING LINE FOR ALUMINUM ALLOY BAR FOR FORGING, AND COLD FORGED PRODUCT

摘要

PROBLEM TO BE SOLVED: To provide a method for manufacturing an aluminum alloy bar for forging, which does not cause a crack in the bar because the bar is appropriately elongated when being deformed, requires a small load to a rolling mill, and can manufacture the bar having superior characteristics and a small diameter with great productivity. SOLUTION: The method for manufacturing the aluminum alloy bar for forging comprises the steps of: cutting the aluminum alloy bar which has been continuously cast through a continuous casting apparatus, with a cutting device; homogenizing the cut aluminum alloy bar by heat treatment in a heat treatment device; and then facing the surface, heating the bar at a temperature between 400°C and a solid phase temperature, rolling it at a rolling rate of 5% to 30%, cutting it and extracting it, in a continuous line. COPYRIGHT: (C)2007,JPO&INPIT