Patent ID: 9657374
Date: 2017-05-23
CPC Classifications: B21C,C22C,C22F

Claim:
1. A method for manufacturing an Al—Si—Mg based aluminum alloy extruded material with excellent machinability using an aluminum alloy billet comprising: Si: 2.0 to 6.0% by mass; Mg: 0.3 to 1.2% by mass; and Ti: 0.01 to 0.2% by mass, a Fe content being restricted to 0.2% or less by mass, with the balance being Al and inevitable impurities, the method comprising: wherein the number of AlFeSi particles having a diameter of 5 μm or more is 20 or less per 50 μm square area of the extruded material, the number of Mg