Patent ID: 9038704
Filing Date: 2015-05-26
Classification: B22D,B23K,C22C

Abstract:
1. A method of forming a structural compressor component for a compressor comprising: casting a molten aluminum alloy material to form a solid structural compressor component, wherein the aluminum alloy material comprises: silicon at greater than about 8 weight % to less than 10 weight % of the aluminum alloy material; manganese at greater than or equal to about 0.8 weight % to less than or equal to about 1.9 weight % of the aluminum alloy material; iron at greater than or equal to about 0.1 weight % to less than or equal to about 0.5 weight % of the aluminum alloy material; magnesium at greater than or equal to about 0.2 weight % to less than or equal to about 0.7 weight % of the aluminum alloy material; boron at greater than or equal to about 0.002 weight % to less than or equal to about 0.15 weight % of the aluminum alloy material; strontium at greater than or equal to about 0.006 weight % to less than or equal to about 0.017 weight % of the aluminum alloy material; less than or equal to about 0.25 weight % copper of the aluminum alloy material; less than or equal to about 0.35 weight % zinc of the aluminum alloy material; less than or equal to about 0.25 weight % titanium of the aluminum alloy material; and a balance of the aluminum alloy material being aluminum; annealing the solid structural compressor component by exposure to a heat source having a holding temperature of greater than or equal to about 500° F. to less than or equal to about 800° F. for greater than or equal to five hours to less than or equal to 24 hours, wherein after the annealing, the solid structural compressor component has a hardness of greater than or equal to about 75 to less than or equal to about 90 HRH (Rockwell Hardness H Scale) and a percentage of elongation of greater than or equal to 7%; and machining the solid structural compressor component for incorporation into the compressor.