Corrosion resistant heavy rail steel with excellent strength-toughness, fatigue resistance and abrasive resistance

Abstract

The invention discloses a corrosion resistant heavy rail steel with excellent strength-toughness, fatigue resistance and abrasive resistance, belonging to the technical field of heavy rail steel. A fundamental alloy system comprises the following alloy elements by weight percent: 0.55%-0.72% of C, 0.35%-1.1% of Si, 0.7%-1.40% of Mn, 0.2%-0.65% of Cr, 0.2%-0.65% of Cu and Fe as the balance; on the basis of the above fundamental ingredients, one or more than one microalloy elements are simultaneously added, including: 0.01%-0.055% of Nb, 0.05%-0.10% of V, 0.001%-0.05% of Ti, 0.1%-0.3% of Ni and 0.15%-0.3% of Mo. The heavy rail steel has the advantage that: mechanical properties of steel rail including strength, toughness, fatigue resistance, abrasive resistance, fracture toughness property and welding property are remarkably enhanced, so that superfine pearlite can be obtained without the need of adopting complex production technology such as rail end quenching. And simultaneously, the steel includes corrosive resistance so as to greatly enhance the service property and the service life of steel rail in corrosive environment.

Description

technical field [0001] The invention belongs to the technical field of heavy rail steel, and in particular provides a corrosion-resistant heavy rail steel with excellent strength, toughness, fatigue resistance and wear resistance, which is used for railways in ordinary environments or corrosive environments with a level of 60 kg / m and above High performance corrosion resistant heavy rail steel. Background technique [0002] Development of Rail Corrosion Resistance Technology [0003] The steel rails in the long-distance tunnels of my country’s railway system are severely corroded, and the annual replacement cost is very high. The improvement and the increase of the train density have reduced the drying time of the rails, so the corrosion of the rails and fasteners has become a more serious disease. The serious corrosion of the Guangzhou-Shenzhen Railway in my country is caused by the above reasons. [0004] Therefore, in response to the urgent requirements of tunnel rails a...

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Problems solved by technology

It is to solve the corrosion resistance of rails from the perspective of rail material alloy system, and solve the problems of high strength, high toughness, high toughness, high wear resistance and h...

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