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US 9,174,276 B2Granted
Method of producing a piston ring having embedded particles
AssigneeFederal-Mogul Burscheid GmbH
InventorsRichard Mittler, Laszlo Pelsoeczy
Life of this patent
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Abstract
A piston ring exhibiting particles capable of wear resistance on its shoulder is produced by producing a melt of the base materials of a metal material, adding ceramic particles to the melt, pouring the melt into a prefabricated mold and cooling the melt. During cooling, the mold is aligned such that the ceramic particles gather on at least one of the piston ring shoulders.
Claims5
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.
1 more element
Dependencies are inferred from the claim text.