Pearlitic steel rail having excellent wear resistance and method of producing the same

A pearlite type steel rail, having a good wear resistance, comprising, in terms of percent by weight:

• C:
• more than 0.85 to 1.20%,
• Si:
• 0.10 to 1.00%,
• Mn:
• 0.40 to 1.50%, and
• the balance consisting of iron and unavoidable impurities,
• said steel rail characterized in that the structure of said steel rail is pearlite, a pearlite lamella space of said pearlite is not more than 100 nm, and a ratio of a cementite thickness to a ferrite thickness in said pearlite is at least 0.15.

A pearlitic steel rail having a good wear resistance, comprising, in terms of percent by weight:

• C:
• more than 0.85 to 1.20%,
• Si:
• 0.10 to 1.00%,
• Mn:
• 0.40 to 1.50%, and
• the balance consisting of iron and unavoidable impurities,
• said steel rail characterized in that the structure within the range of a depth of 20 mm from the surface of a rail head portion of said steel rail with said head surface being the start point is pearlite, a pearlite lamella space of said pearlite is not more than 100 nm, and a ratio of a cementite thickness to a ferrite thickness in said pearlite is at least 0.15.

A pearlitic steel rail having a good wear resistance, comprising, in terms of percent by weight:

• C:
• more than 0.85 to 1.20%,
• Si:
• 0.10 to 1.00%,
• Mn:
• 0.40 to 1.50,
• at least one member selected from the group consisting of:
• Cr:
• 0.05 to 0.50%,
• Mo:
• 0.01 to 0.20%,
• V:
• 0.02 to 0.30%,
• Nb:
• 0.002 to 0.05%,
• Co:
• 0.10 to 2.00%,
• B:
• 0.0005 to 0.005%, and
• the balance consisting of iron and unavoidable impurities,
• said steel rail characterized in that the structure of said steel rail is pearlite, a pearlite lamella space in said pearlite is not more than 100 nm, and a ratio of a cementite thickness to a ferrite thickness in said pearlite structure is at least 0.15.

A pearlitic steel rail having a good wear resistance, comprising, in terms of percent by weight:

• C:
• more than 0.85 to 1.20%,
• Si:
• 0.10 to 1.00%,
• Mn:
• 0.40 to 1.50%,
• at least one member selected from the group consisting of:
• Cr:
• 0.05 to 0.50%,
• Mo:
• 0.01 to 0.20%,
• V:
• 0.02 to 0.30%,
• Nb:
• 0.002 to 0.05%,
• Co:
• 0.10 to 2.00%,
• B:
• 0.0005 to 0.005%, and
• the balance consisting of iron and unavoidable impurities,
• said steel rail characterized in that the structure within the range of a depth of 20 mm from the surface of a rail head portion of said steel rail with said head surface being the start point is pearlite, a pearlite lamella space of said pearlite is not more than 100 nm, and a ratio of a cementite thickness to a ferrite thickness in said pearlite is at least 0.15.