RAIL HAVING EXCELLENT ROLLING FATIGUE DAMAGE RESISTANCE AND WEAR RESISTANCE, AND PRODUCTION METHOD THEREFOR

摘要

PROBLEM TO BE SOLVED: To simultaneously improve the rolling fatigue damage resistance and wear resistance in a passenger railroad and a freight railroad. ;SOLUTION: The steel rail having excellent rolling fatigue damage resistance and wear resistance has a mixed metallic structure of a bainitic structure and a pearlitic structure. In the optional cross section of the steel rail, the range of the area ratio of the pearlitic structure in the whole structure is 10 to 50%. The rail has components containing, by mass, 0.25 to 0.60% C, 0.05 to 2.00% Si, 0.10 to 3.00% Mn and 0.10 to 3.00% Cr, and the balance Fe with inevitable impurities.;COPYRIGHT: (C)2003,JPO