US 11,752,550 B2
Method for improving fatigue strength on sized aluminum powder metal components
Donald Paul Bishop, Stillwater Lake (CA); Matthew D. Harding, Bedford (CA); Richard L. Hexemer, Jr., Granite Falls, NC (US); and Ian W. Donaldson, Madison, NH (US)
Assigned to GKN Sinter Metals, LLC, Auburn Hills, MI (US)
Filed by GKN Sinter Metals, LLC, Auburn Hills, MI (US)
Filed on Jan. 10, 2019, as Appl. No. 16/244,406.
Claims priority of provisional application 62/615,799, filed on Jan. 10, 2018.
Prior Publication US 2019/0210112 A1, Jul. 11, 2019
Int. Cl. B22F 3/24 (2006.01); B22F 3/16 (2006.01); C22C 1/04 (2023.01); B22F 3/14 (2006.01); C22C 21/00 (2006.01); C22F 1/04 (2006.01)
CPC B22F 3/24 (2013.01) [B22F 3/14 (2013.01); B22F 3/16 (2013.01); B22F 3/162 (2013.01); C22C 1/0416 (2013.01); B22F 2003/166 (2013.01); B22F 2003/247 (2013.01); B22F 2003/248 (2013.01); B22F 2201/50 (2013.01); B22F 2301/052 (2013.01); B22F 2303/15 (2013.01); B22F 2998/10 (2013.01); C22C 21/00 (2013.01); C22F 1/04 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method of manufacturing a sized powder metal component having improved fatigue strength over an otherwise identically-processed powder metal component that is not re-solutionized, the method comprising the sequential steps of:
solutionizing a sintered powder metal component comprising an aluminum alloy and quenching the sintered powder metal component;
sizing the sintered powder metal component to form a sized powder metal component;
re-solutionizing the sized powder metal component; and
ageing the sized powder metal component.