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High Strength Bainitic Steel Rails for Heavy Haul Railways with Superior Damage Resistance
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2001
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Pearlitic SteelsEngineeringMechanical EngineeringPearlitic Rail SteelsStructural PerformanceHigh Strength Low Alloy SteelStructural MechanicsStructural SteelStructural EngineeringCorrosionWear-resistant MaterialMaterials ScienceHeavy Haul RailwaysMicrostructureWear ResistanceGood Wear ResistanceCivil EngineeringSuperior Damage ResistanceMechanics Of Materials
NKK has developed high strength bainitic steel rails with superior flaking resistance for heavy haul railways. In this paper, rolling contact fatigue and wear behavior in bainitic and pearlitic rail steels with various tensile strengths were studied. Emphasis was placed on examining the formation behavior of the WEL(White Etching Layer) in bainitic and pearlitic steels, and its effect on flaking resistance. Advantages of the newly developed high-strength bainitic steel with superior flaking resistance, good wear resistance and excellent weldability have been also discussed.