HIGH-STRENGTH, ABRASION-RESISTANT RAIL WITH PERLITE STRUCTURE AND METHOD FOR THE PRODUCTION THEREOF

摘要

This invention relates to a high-tenacity rail having a strength, an abrasion resistance, and a high carbon pearlite structure excellent in ductility and tenacity; and a method of manufacturing the same. A high-tenacity rail having elongation of not less than 12 % and a U-notch Charpy impact value of not less than 25 J/cm2 obtained by forming fine pearlite blocks by a special rolling operation in steel of a high abrasion resistance containing 0.60-1.20 wt.% of C, 0.10-1.20 wt.% of Si and 0.40-1.50 wt.% of Mn, and one or not less than two kinds of elements out of Cr, Mo, V, Nb and Co as necessary; and a method of manufacturing the same. This invention enables the ductility and tenacity of a high carbon steel rail of a high abrasion resistance to be improved, and a rail of a high safety to be provided for railways in a cold district. IMAGE