US2015368772A1PendingUtilityA1

Aluminum Alloys with Anodization Mirror Quality

42
Assignee: APPLE INCPriority: Jun 19, 2014Filed: Jun 19, 2015Published: Dec 24, 2015
Est. expiryJun 19, 2034(~7.9 yrs left)· nominal 20-yr term from priority
Inventors:Herng-Jeng JouAbhijeet Misra
C22C 21/08C22F 1/05C22F 1/047
42
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Claims

Abstract

The disclosure provides an aluminum alloy comprising second phase particles having an Al(FeMn)Si phase with an (Fe+Mn):Si ratio of 0.5 to 2.5 and a mean particle diameter of 0.5 μm to 10 μm. The disclosure also provides an aluminum alloy comprising 0.02 to 0.11 wt % Fe, 0 to 0.16 wt % Mn, 0 to 0.08 wt. % Cr, 0.40 to 0.90 wt % Mg, and 0.20 to 0.60 wt % Si, wherein the aluminum alloy is homogenized at a temperature from 550 to 590° C.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . An aluminum alloy comprising less than 16% area fraction of Fe-containing particles. 
     
     
         2 . The aluminum alloy according to  claim 1 , wherein said alloy is a 6000 series aluminum alloy. 
     
     
         3 . The aluminum alloy according to  claim 1 , wherein the alloy is a 6063 aluminum alloy. 
     
     
         4 . The aluminum alloy according to  claim 1 , wherein said alloy comprises from 0.2 wt % to 0.16 wt % Fe. 
     
     
         5 . The aluminum alloy according to  claim 4 , wherein the alloy is a 6063 aluminum alloy. 
     
     
         6 . The aluminum alloy according to  claim 1 , wherein said alloy comprises from 0.10 wt % to 0.12 wt % Fe. 
     
     
         7 . The aluminum alloy according to  claim 1 , wherein said alloy comprises from 0 to 0.16 wt % Mn. 
     
     
         8 . The aluminum alloy according to  claim 1 , wherein said alloy comprises from 0.02 to 0.06 wt % Mn. 
     
     
         9 . The aluminum alloy according to  claim 1 , wherein said alloy comprises from 0-0.08 wt % Cr. 
     
     
         10 . The aluminum alloy according to  claim 1 , wherein said alloy comprises more than 0.02 wt % Cr. 
     
     
         11 . The aluminum alloy according to  claim 1 , wherein said alloy comprises iron-containing particles. 
     
     
         12 . The aluminum alloy according to  claim 11 , wherein the mean diameter of the iron-containing particles is less than 9 microns. 
     
     
         13 . The aluminum alloy according to  claim 12 , wherein the area fraction of the iron-containing particles is less than 16%. 
     
     
         14 . The alloy of  claim 1 , wherein the gloss (20°) of the alloy is greater than 160. 
     
     
         15 . The alloy of  claim 1 , wherein the gloss (60°) of the alloy is greater than 135. 
     
     
         16 . The alloy of  claim 1 , wherein the DOI of the anodized aluminum alloy is greater than 80. 
     
     
         17 . The alloy of  claim 1 , wherein the LogHaze of the anodized aluminum alloy is less than 600. 
     
     
         18 . A method of processing a 6000 series aluminum alloy having less than 16% area fraction of Fe-containing particles, said method comprising homogenizing the alloy at a temperature from 550° C. to 590° C. 
     
     
         19 . The method of  claim 18 , wherein said homogenizing occurs for between 1 hour and 6 hours. 
     
     
         20 . A 6000 series aluminum alloy having less than 16% area fraction of Fe-containing particles, the alloy prepared by homogenizing the alloy at a temperature from 550° C. to 590° C. for from between 1 hour and 6 hours.

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