| 摘要 |
PROBLEM TO BE SOLVED: To provide an Al alloy forging excellent in high temperature fatigue strength in addition to high temperature properties such as heat resistance and high temperature proof stress. SOLUTION: The aluminum alloy forging has a composition comprising 4.0 to 7.0% Cu, 0.2 to 0.4% Mg, 0.05 to 0.7% Ag and 0.05 to 0.15% V, and the balance aluminum with inevitable impurities. The distribution density of Al-V based precipitates in the structure of the forging is controlled to≥1.5 pieces/(μm)<SP>3</SP>, so that it is made excellent in high temperature fatigue strength in addition to high temperature properties such as heat resistance and high temperature proof stress. COPYRIGHT: (C)2005,JPO&NCIPI
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