US2025122597A1PendingUtilityA1
Improved aluminium based casting alloy
Est. expiryAug 23, 2041(~15.1 yrs left)· nominal 20-yr term from priority
Inventors:Roger Neil Lumley
B22D 21/007C22F 1/043C22C 21/02C22C 1/026
49
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Claims
Abstract
An aluminium based alloy consisting essentially of (wt %): silicon: 4.0 to 8.5% magnesium: 0.07 to 0.3% titanium: 0.06 to 0.2% manganese: <0.05% iron: <0.15% chromium: <0.01% nickel: <0.01% copper: 2.5 to 4% zinc: 0 to 0.5% strontium: >0.001 to 0.03% beryllium: less than 0.0005% tin: less than 0.01% other elements (each): less than 0.05% each other elements total: less than 0.15% in total, and a balance of aluminium and other unavoidable impurities.
Claims
exact text as granted — not AI-modified1 . An aluminium based alloy consisting essentially of (wt %):
silicon
:
4.0 to 8.5%
magnesium
:
0.07 to 0.3%
titanium
:
0.06 to 0.2%
manganese
:
<0.05%
iron
:
<0.15%
chromium
:
<0.01%
nickel
:
<0.01%
copper
:
2.5 to 4%
zinc
:
0 to 0.5%
strontium
:
>0.001 to 0.03%
beryllium
:
less than 0.0005%
tin
:
less than 0.01%
other elements (each)
:
less than 0.05% each
other elements total
:
less than 0.15% in total,
and a balance of aluminium and other unavoidable impurities.
2 . The aluminium based alloy of claim 1 , wherein the composition is free of beryllium, rare earth elements, and free of chromium, and other transition metal elements not including Ti, Mn, Fe, Ni, Cu, Sr and Zn.
3 . The aluminium based alloy of claim 1 , wherein the silicon level is from 4.0 to 5.5 wt %, or about 5 wt %.
4 . The aluminium based alloy of claim 1 , wherein the silicon level is from 4.5 wt % to 7.5 wt %, or from 5.0 to 7.5 wt %.
5 . The aluminium based alloy of claim 1 , wherein copper is present at from 3 to 3.75 wt %.
6 . The aluminium based alloy of claim 1 , wherein the combined iron and manganese content is less than 0.1 wt %.
7 . The aluminium based alloy of claim 1 , wherein zinc is present at from 0.1 to 0.3 wt %.
8 . The aluminium based alloy of claim 1 , wherein magnesium is present at from 0.15 to 0.25 wt %.
9 . The aluminium based alloy of claim 1 , wherein strontium is present at from 0.01 to 0.025 wt %, or from 0.01 to 0.015 wt %.
10 . The aluminium based alloy of claim 1 , wherein strontium is present at from 0.001 to 0.008 wt %, or from 0.001 to 0.005 wt %.
11 . The aluminium based alloy of claim 1 , comprising a casting alloy for casting processes having a casting pressure of less than 10 bar.
12 . The aluminium based alloy of claim 1 , comprising a sand casting alloy or an investment casting alloy.
13 . The aluminium based alloy of claim 1 , comprising an ingot of alloy.
14 . A method of fabricating an aluminium-based alloy product, the method comprising:
providing an aluminium alloy melt from the aluminium-based alloy according to claim 1 ; and casting said aluminium alloy melt into a mould using a using a casting process having a casting pressure of less than 10 bar.
15 . A method according to claim 14 , wherein the casting process comprises one of sand casting or investment casting.
16 . A cast product or component produced using the aluminium based alloy of claim 1 .
17 . A cast product or component according to claim 16 , produced using a casting process having a casting pressure of less than 10 bar.
18 . A cast product or component according to claim 16 , comprising one of a sand cast product, or an investment cast product or a structural aerospace casting.
19 . (canceled)
20 . An aluminium alloy based casting comprising at least one aluminium based alloy according to claim 1 .
21 . The product, component or casting of claim 15 , wherein the microstructure of the alloy includes dendrites with a dendrite arm spacing is less than 50 μm, preferably between 10 μm and 45 μm.
22 . (canceled)Join the waitlist — get patent alerts
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