| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a 6,000 series aluminum alloy extruded form which is excellent in both of bending crushability and corrosion resistance required for an automobile body reinforcing material even if the collision conditions of an automobile are made severe, and to provide a method for producing the same. <P>SOLUTION: Disclosed is an Al-Mg-Si aluminum alloy extruded form containing, by mass, 0.60 to 1.20% Mg, 0.30 to 0.95% Si, 0.01 to 0.40% Fe, 0.30 to 0.52% Mn, 0.001 to 0.65% Cu and 0.001 to 0.10% Ti, and the balance Al, wherein the contents of the Mg and Si satisfy relation of Mg(%)-(1.73×Si(%)-0.25)≥0. The extruded form has an equi-axed recrystallized grain structure, wherein the area proportion of recrystallized grains is≥65%, the average interval between grain boundary deposition each other having the center-of-gravity diameter of≥1μm, observed with a TEM having a magnification of 5,000 times is over 25μm and the average area proportion of Goss-orientation over all areas in thickness direction of this extruded form is less than 8%. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
