Aluminium alloy
Abstract
In a first aspect, the invention provides aluminium alloy comprising the following composition, all values in weight %: Si 0.25-1.5 Cu 0.3-1.5 Fe up to 0.5 Mn up to 0.1 all other elements including Mg being incidental and present (if at all) then in an amount less than or equal to 0.05 individually, and less than or equal to 0.15 in aggregate, the balance being aluminium. In a second aspect, the invention provides a composite aluminium sheet product comprising a core layer and at least one clad layer wherein the at least one clad layer is an aluminium alloy comprising the following composition, all values in weight %: Si 0.25-1.5 Cu 0.3-1.5 Fe up to 0.5 Mn up to 0.1 all other elements including Mg being incidental and present (if at all) then in an amount less than or equal to 0.05 individually, and less than or equal to 0.15 in aggregate, the balance being aluminium. In a third aspect, the invention provides a method of making a joined structure of a steel component and an aluminium component made from the alloy and/or the sheet product of the invention.
Claims
exact text as granted — not AI-modified1 - 15 . (canceled)
16 . An aluminum alloy comprising the following composition, all values in weight %:
Si
0.25-1.5
Cu
0.3-1.5
Fe
up to 0.5
Mg
<0.1
Mn
up to 0.2
unavoidable impurities less than or equal to 0.05 each and less than or equal to 0.15 in total,
balance aluminum.
17 . The aluminum alloy of claim 16 , wherein:
Mn is up to 0.1 and Mg is in an amount less than or equal to 0.05.
18 . The aluminum alloy of claim 16 , wherein the Si content is 0.5-1.25.
19 . The aluminum alloy of claim 16 , wherein the Cu content is 0.3-1.25.
20 . The aluminum alloy of claim 16 , wherein the Mn content is not more than 0.08.
21 . The aluminum alloy of claim 16 , wherein the Mn content is <0.01.
22 . The aluminum alloy of claim 16 , wherein the Mg content is <0.01.
23 . A joined structure comprising a steel component and an aluminum alloy component joined thereto and wherein the aluminum alloy component is made from the aluminum alloy of claim 16 .
24 . The joined structure of claim 20 , wherein an interface zone between the steel component and the aluminum alloy component comprises an FeAl layer adjacent to the steel component.
25 . A composite aluminum sheet product comprising a core layer and at least one clad layer wherein the at least one clad layer is an aluminum alloy comprising the following composition, all values in weight %:
Si
0.25-1.5
Cu
0.3-1.5
Fe
up to 0.5
Mg
<0.1
Mn
up to 0.2
unavoidable impurities less than or equal to 0.05 each and less than or equal to 0.15 in total,
balance aluminum.
26 . The composite aluminum sheet product of claim 25 , wherein:
Mn is up to 0.1 and Mg is in an amount less than or equal to 0.05.
27 . The composite aluminum sheet product of claim 25 , wherein the core layer is made from an alloy selected from the group of 5XXX and 6XXX series alloys.
28 . The composite aluminum sheet product of claim 25 , wherein the core layer is made from an alloy selected from the group consisting of AA6016, AA6016A, AA6014, AA6011, AA6111, AA6009, AA6010, AA6022 and AA6451.
29 . The composite aluminum sheet product of claim 25 , wherein the core layer is made from an alloy selected from the group consisting of AA5005, AA5152, AA5052, AA5018, AA5454, AA5754, AA5056, AA5456, AA5182, AA5186, AA5059, AA5083 and AA5383.
30 . A joined structure comprising a steel component and an aluminum alloy component joined thereto and wherein the aluminum alloy component is made from the composite aluminum sheet product of claim 25 .
31 . A method of making a joined structure comprising a steel component and an aluminum component comprising joining the steel and aluminum components by a thermal process that causes at least a part of the aluminum component to melt, and wherein the aluminum component is made from the alloy of claim 16 .
32 . A method of making a joined structure comprising a steel component and an aluminum component comprising joining the steel and aluminum components by a thermal process that causes at least a part of the aluminum component to melt, and wherein the aluminum component is made from the composite aluminum sheet product of claim 25 .
33 . The method of claim 31 , wherein the thermal process is laser welding.
34 . The method of claim 32 , wherein the thermal process is laser welding.
35 . The method of claim 31 , further comprising treating Fe and Mn as impurities, and reducing their presence to the extent that is practicable.
36 . The method of claim 32 , further comprising treating Fe and Mn as impurities, and reducing their presence to the extent that is practicable.
37 . The method of claim 35 , wherein the thermal process is laser welding.
38 . The method of claim 36 , wherein the thermal process is laser welding.Join the waitlist — get patent alerts
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