Piston rings
AssigneeFederal-Mogul Burscheid GmbH
InventorLaszlo Pelsoeczy
Life of this patent
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Abstract
The invention relates to a steel material composition, in particular for producing piston rings and cylinder sleeves, containing the following elements in the given fractions in relation to 100% by weight of the steel material: 0.5-1.2% by weight C, 2.0-20.0% by weight Cr, 49.0-97.1% by weight Fe, 0.1-3.0% by weight Mn, 0.1-3.0% by weight Mo, 0.-7.0% by weight Nb, 2.0-10.0% by weight Si, 0-7.0% by weight Ti, 0.-7.0% by weight V and 0.-0.5% by weight W, the sum of the fractions of Nb, Ti, V and W being 2.0-7.0% by weight. Said composition can be produced by melting the starting materials and casting the melt in a pre-fabricated mold.
Claims10
A piston ring, including a cast steel material composition as the basic element thereof, wherein the steel material composition consists of the following elements in the proportions indicated relative to 100% by weight of the steel material composition:
- C:
- 0.5-1.2% by weight
- Cr:
- 0.2-20.0% by weight
- Fe:
- 49.0-97.1% by weight
- Mn:
- 0.1-3.0% by weight
- Mo:
- 0.1-3.0% by weight
- Nb:
- 0.0-7.0% by weight
- Si:
- 3.0-10.0% by weight
- Ti:
- 0.0-7.0% by weight
- V:
- 0.0-7.0% by weight
- W:
- 0.0-0.5% by weight
- B:
- max. 0.5% by weight
- Cu:
- max. 2.0% by weight
- Ni:
- max. 4.0% by weight
- P:
- max. 0.1% by weight
- Pb:
- max. 0.05% by weight
- S:
- max. 0.05% by weight
- Sn:
- 0.001-0.05% by weight
- wherein the sum of the fractions of Nb, Ti, V and W is from 2.0 to 7.0% by weight.
A method for producing a piston ring comprising
- a. Producing a melt from a steel material composition consisting of
- C:
- 0.5-1.2% by weight
- Cr:
- 0.2-20.0% by weight
- Fe:
- 49.0-97.1% by weight
- Mn:
- 0.1-3.0% by weight
- Mo:
- 0.1-3.0% by weight
- Nb:
- 0.0-7.0% by weight
- Si:
- 3.0-10.0% by weight
- Ti:
- 0.0-7.0% by weight
- V:
- 0.0-7.0% by weight
- W:
- 0.0-0.5% by weight
- B:
- max. 0.5% by weight
- Cu:
- max. 2.0% by weight
- Ni:
- max. 4.0% by weight
- P:
- max. 0.1% by weight
- Pb:
- max. 0.05% by weight
- S:
- max. 0.05% by weight
- Sn:
- 0.001-0.05% by weight wherein the sum of the fractions of Nb, Ti, V and W is from 2.0 to 7.0% by weight.
Dependencies are inferred from the claim text.