US2025313921A1PendingUtilityA1
Aluminium casting alloy displaying improved thermal conductivity
Est. expiryAug 23, 2041(~15.1 yrs left)· nominal 20-yr term from priority
Inventors:Roger Neil Lumley
C25D 11/04C22C 1/02C22F 1/043C22C 21/02C22C 1/026C22C 21/04
56
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Claims
Abstract
The present invention provides an aluminium based alloy consisting essentially of a weight percentage composition of: silicon: 1.5 to 2.5% magnesium: 0.1 to 0.6% titanium: 0.06 to 0.4% manganese: <0.6% iron: <0.6% chromium: <0.01% nickel: <0.01% vanadium: <0.02% copper: <0.05% zinc: <0.05% strontium: <0.03% beryllium: <0.0005% tin: <0.01% boron: <0.10% other elements (each): less than 0.10% each other elements: less than 0.20% 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
1.5 to 2.5%
magnesium
0.1 to 0.6%
titanium
0.06 to 0.4%
manganese
<0.6%
iron
<0.6%
chromium
<0.01%
nickel
<0.01%
vanadium
<0.02%
copper
<0.05%
zinc
<0.05%
strontium
<0.03%
beryllium
<0.0005%
tin
<0.01%
boron
<0.10%
other elements (each)
less than 0.10% each
other elements
less than 0.20% 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, Cu, Ni, V, Sr and Zn at the levels specified in claim 1 .
3 . The aluminium based alloy of claim 1 or 2 , wherein the amount of free titanium is greater than 0.04 wt %.
4 . The aluminium based alloy of any one of claims 1 to 3 wherein the amount of free titanium is greater than 0.15%.
5 . The aluminium based alloy of any one of claims 1 to 4 , wherein the amount of boron present is greater than 0.015%.
6 . The aluminium based alloy of any one of claims 1 to 5 , wherein the amount of boron present is less than 0.03%.
7 . The aluminium based alloy of any one of claims 1 to 6 , wherein the silicon level is from 1.5 to 2.2 wt %, preferably 1.5 to 2.0 wt %, more preferably about 1.7 wt %.
8 . The aluminium based alloy of any one of claims 1 to 7 , wherein the silicon is from 1.8 to 2.5 wt %
9 . The aluminium based alloy of any one of claims 1 to 8 , wherein magnesium is present at from 0.2 to 0.4 wt %, preferably from 0.2 to 0.3 wt %.
10 . The aluminium based alloy of any one of claims 1 to 8 , wherein magnesium is present at from 0.3 to 0.5 wt %.
11 . The aluminium based alloy of any one of claims 1 to 10 , wherein zinc is present at <0.01 wt %.
12 . The aluminium based alloy of any one of claims 1 to 11 , wherein strontium is present at from 0.01 to 0.015 wt %.
13 . The aluminium based alloy of any one of claims 1 to 12 , wherein manganese is <0.02 wt %.
14 . The aluminium based alloy of any one of claims 1 to 13 , wherein iron is <0.15 wt %.
15 . The aluminium based alloy of any one of claims 1 to 14 , comprising a sand casting alloy or an investment casting alloy.
16 . The aluminium based alloy of any one of claims 1 to 14 , wherein manganese is present at 0.4 to 0.6 wt %.
17 . The aluminium based alloy of any one of claims 1 to 14 , wherein iron is present at 0.05 to 0.3 wt %.
18 . The aluminium based alloy of claim 16 or 17 , comprising a high pressure die casting alloy.
19 . A method of fabricating an aluminium-based alloy product, the method comprising:
providing an aluminium alloy melt from the aluminium-based alloy according to any one of claims 1 to 18 ; and casting said aluminium alloy melt into a mould to produce a casting.
20 . A method according to claim 19 , wherein the casting process comprises one of sand casting, investment casting, gravity casting or die casting.
21 . A method according to claim 19 or 20 , further including the step of:
anodizing the casting.
22 . A method according to any one of claims 19 to 21 , further including the step of:
heat treating the casting to a T4, T5, T6, T7, T8 or T9 temper.
23 . A cast product or component comprising the aluminium based alloy of any one of claims 1 to 18 .
24 . A cast product or component according to claim 23 , comprising a sand cast product, an investment cast product, or a high pressure die cast product.
25 . A cast product or component according to claim 23 or 24 , comprising a structural casting.
26 . A cast product or component according to any one of claims 23 to 25 , wherein the cast product or component is anodized, preferably anodized green, blue or black.
27 . A cast product or component according to any one of claims 23 to 26 , wherein the cast product or component is heat treated to a T4, T5, T6, T7, T8 or T9 temper.
28 . An ingot produced using the aluminium based alloy of any of claims 1 to 18 .Join the waitlist — get patent alerts
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