| 摘要 |
<p>A wrought aluminium alloy product having the following chemical composition, expressed in wt%:
- 1.3% ‰¤ Si ‰¤ 12%,
-1.35 % ‰¤ Fe ‰¤ 1.8%
wherein the total Fe+Si content is higher than 3,4 %, preferably 3,6 %;
-0,15 % ‰¤ Cu ‰¤ 6%;
- 0.6 % ‰¤ Mg ‰¤ 3 %;
- optionally, one or more of the following elements:
- Mn ‰¤ 1 %;
- Cr ‰¤ 0,25%;
- Ni ‰¤ 3%;
- Zn ‰¤ 1 %;
- Ti ‰¤ 0.1 % ;
- Bi ‰¤ 0.7 %;
- In ‰¤ 0.7 %;
- other elements < 0.05% each and 0.15% in total;
- and the balance aluminium. Preferably, this product is extruded from a billet which is homogenised at a temperature in the range of 525°C to 555°C for at least one hour.</p> |
