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US 2008/0289732 A1Published application
Aluminium-magnesium alloy product
AssigneesCorus Aluminium N.V., Corus Aluminium Walzprodukte GmbH
InventorsJob Anthonius Van Der Hoeven, Linzhong Zhuang, Bruno Schepers, Peter De Smet, Jean Pierre Jules Baekelandt
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Abstract
Method for making an aluminium-magnesium alloy in the form of a rolled product, having the composition in weight percent of: Mg 4.8-5.6, Mn 0.05-0.4, Zn 0.40-0.6, Cu 0.06-0.35, Cr 0.25 max., Fe 0.35 max., Si 0.25 max., Zr 0.12 max., Ti 0.3 max., others (each) max. 0.05, (total) max. 0.15, and balance aluminium.
Claims25
Method of producing a wrought aluminium alloy rolled product comprising the steps of:
- (i) providing an intermediate alloy product having a composition in weight percent consisting of:
- Mg
- 4.8-5.6
- Mn
- 0.05-0.4
- Zn
- 0.40-0.6
- Cu
- 0.06-0.35
- Cr
- 0.25 max.
- Fe
- 0.35 max.
- Si
- 0.25 max.
- Zr
- 0.12 max.
- Ti
- 0.3 max.
- impurities (each) max. 0.05, (total) max. 0.15 balance aluminium,
- (ii) cold working the intermediate alloy product to a final gauge to obtain an intermediate wrought product,
- (iii) annealing the intermediate wrought product by heating the product at a heating rate in the range of 2 to 200° C./sec, holding the product at a soaking temperature in the range of 480 to 570° C. for a duration of up to 100 sec, followed by a cooling rate in the range of 10 to 500° C./sec to below a temperature of 150° C.
19 more elements
wherein the final gauge of the aluminium product is at most 5 mm.
Dependencies are inferred from the claim text.