PROPERTY ANALYSIS OF DOMESTIC AND FOREIGN HEAT-TREATED STEEL RAILS

The present paper mainly introduced the properties of full-length heat-treated steel rails produced by some major companies at home and abroad. The inspection analysis to the practical properties of some full-length heat-treated steel rails have proved that V-containing micro-alloyed heat-treated rail PD₃ made by Panzhihua Iron & Steel Corp. ranks first in the comparison of comprehensive mechanical property; the indexes of comprehensive properties of plain carbon heattreated rail PD₂ also produced by Panzhihua Iron & Steel Corp. is by no means inferior.to the foreign counterpart,the hardness and strength of Japan-made Cr-alloyed rail DHH with on-line heat treatment are equivalent to the off-line heat-treated carbon rail,but the toughness is slightly lower.