Rail steel with an excellent combination of wear properties and rolling contact fatigue resistance
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United States of America Patent
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Apr 30, 2013
Grant Date -
Feb 17, 2011
app pub date -
Feb 23, 2009
filing date -
Feb 22, 2008
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Abstract
A high-strength pearlitic steel rail with an excellent combination of wear properties and rolling contact fatigue resistance wherein the steel has 0.88% to 0.95% carbon, 0.75% to 0.92% silicon, 0.80% to 0.95% manganese, 0.05% to 0.14% vanadium, up to 0.008% nitrogen, up to 0.030% phosphorus, 0.008 to 0.030% sulphur, at most 2.5 ppm hydrogen, at most 0.10% chromium, at most 0.010% aluminium, at most 20 ppm oxygen, the remainder being iron and unavoidable impurities.
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