The 980 MPa hot rolled corrosion-resistant rail steel U68CuCr (/% : 0.65-0.75C
0.40-0.80Si
1.00-1.30Mn
≤0.030P
≤0.025P
≤0.50Cu
≤0.50Cr
≤0.05Nb) is developed by defined the chemical composition and the desulphurized metal-120t top and bottom combined blown converter-argon blowing- LF-RH-280 mm x 380 mm bloom casting-rolling process. Test results show that the tensile strength of corrosion-resistant rail steel U68CuCr is ≥1060 MPa with elongation ≥12%
the hardness HB value of rolling face is 300-310
the interlamellar spacing of pearlite is 0.2 μm
and the wear resistance is better than that of U75V rail steel with same strength rating. The results of 2% NaCl corrosion test show that the corrosion rate o£ rail steel U68CuCr is 57% of that of rail steel U75V. The corrosion-resistant steel U68CuCr rail has better serve performance in Beijing-Guangzhou railway line for 3 years with gross transporting load 0.3 billion t
and all properties of steel U68CuCr rail meet the requirement of rail.