BAINITIC STEEL RAILS EXCELLING IN RESISTANCE TO SURFACE FATIGUE FAILURES AND WEAR RESISTANCE

摘要

A high strength bainite type steel rail having improved surface fatigue damage resistance and wear resistance at a rail head portion required by a heavy load railway, containing specific components and exhibiting a bainite structure at a part thereof, characterized in that the sum of the areas occupied by carbides having major diameters within the range of 100 to 1,000 nm at an arbitary section of the bainite structure is 10 to 50 % of the area of an arbitrary section.