	US 11,807,928 B2
	Copper-based casting products and processes
Kevin Paul Trumble, West Lafayette, IN (US); and Kevin Joseph Chaput, Merritt Island, FL (US)
Assigned to Purdue Research Foundation, West Lafayette, IN (US)
Filed by Purdue Research Foundation, West Lafayette, IN (US)
Filed on Apr. 28, 2021, as Appl. No. 17/243,515.
Application 17/243,515 is a division of application No. 15/105,998, granted, now 11,136,649, previously published as PCT/US2014/071793, filed on Dec. 22, 2014.
Claims priority of provisional application 61/919,917, filed on Dec. 23, 2013.
Prior Publication US 2021/0246531 A1, Aug. 12, 2021
Int. Cl. C22C 9/05 (2006.01); B22D 21/02 (2006.01)

CPC C22C 9/05 (2013.01) [B22D 21/025 (2013.01)]

10 Claims

1. A method of casting an article comprising:

forming a melt comprising copper in a melting vessel;

introducing manganese into the melt to produce a copper-manganese alloy; and

casting the copper-manganese alloy in a mold to form the article,

wherein the carbon and oxygen contents of the copper-manganese alloy are controlled in order to control the formation of graphite, manganese carbide, and manganese oxide particles within the article, resulting in a hardness value greater than hardness of a cast copper-manganese article without the presence of manganese carbide particles.