| 摘要 |
PROBLEM TO BE SOLVED: To provide an Al-Mg-Si based aluminum alloy forging material for a transport carrier structural material in which the crystal grains in the casting material or forging material structure can surely be refined, and which has high strength, high toughness and excellent corrosion resistance as well, and to provide a production method therefor. SOLUTION: The aluminum alloy forging material has a composition comprising 0.6 to 1.8% Mg, 0.4 to 1.8% Si and 0.1 to 1.0% Cu, further comprising one or two kinds of metals selected from 0.01 to 0.9% Mn and 0.01 to 0.25% Cr, and, in which, further, under the new addition of 0.05 to 0.1% metal Ti, the total content of Ti is controlled to≤0.15%, and, as impurities, the content of Zr is regulated to≤0.01%, V to≤0.01% and Hf to≤0.01%, and, the total content of Zr, V and Hf is also regulated to≤0.01%, and the balance Al with inevitable impurities. The average crystal grain size of the structure of the forging material after artificial age hardening treatment is≤100μm. COPYRIGHT: (C)2005,JPO&NCIPI
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