| 摘要 |
Disclosed is an aluminium alloy forging for use in automotive suspension parts and the like, and a method of manufacture for same. The aluminium alloy forging contains Si 0.4-1.5 wt%, Fe greater than 0.4 wt% and equal to or less than 1.0 wt%, Cu equal to or less than 0.40 wt%, Mg 0.8-1.3 wt% and Ti 0.01-0.1 wt%; Zn is restricted to equal to or less than 0.05 wt%; and the aluminium alloy forging contains at least one selected from among the following group comprising: Mn 0.01-1.0 wt% and Cr 0.1-0.4%; and Zr 0.05-0.2 wt%. Hydrogen content is restricted to 0.25ml or less per 100g of Al, and the remainder is composed of unavoidable impurities and Al. The average grain size is 50µm or less, the crystallised area ratio is 3% or less, and the average crystallized grain size is 8µm or less. |
