Patent ID: 9091345
Filing Date: 2015-07-28
Classification: B22D,C21D,C22C,F16J

Abstract:
1. A piston ring formed of a cast iron, comprising, in weight percent (wt. %) of said cast iron: 2.2 to 2.9 wt. % carbon, 3.2 to 4.2 wt. % silicon, 0.75 to 1.25 wt. % copper, 1.0 to 1.5 wt. % manganese, 0.09 to 0.15 wt. % sulfur, and not greater than 0.1 wt. % phosphorous, based on the total weight of said cast iron; and wherein said cast iron comprises a matrix including at least one of martensite and bainite, and including manganese sulfide (MnS) and carbides dispersed throughout said matrix.