Patent ID: 9174276
Filing Date: 2015-11-03
Classification: B22D,B22F,C21D,C22C,F16J

Abstract:
1. A method of producing a piston ring comprising: a. producing a melt of the base materials of a cast iron or cast steel material, b. adding ceramic particles to the melt, wherein the ceramic particles exhibit a smaller density than the melt; c. pouring the melt into a prefabricated mold, wherein the mold only allows the casting of a ring, and d. cooling the melt, wherein a cooling rate is maintained, so that a period ≧120 seconds elapses before the liquidus temperature is reached and wherein the mold is aligned horizontally, in order to facilitate a separation by means of gravitational force, so that the ceramic particles gather on at least one of the piston ring shoulders during cooling.