Steel for wheels of rapid transit railway vehicles

Abstract

The invention provides steel for wheels of rapid transit railway vehicles, which comprises the following chemical components in percentage by mass: 0.45 to 0.70 percent of C, 0.1 to 0.5 percent of Si, 0.6 to 0.9 percent of Mn, 0.01 to 0.3 percent of Cr, 0.002 to 0.03 percent of P, 0.005 to 0.04 percent of Al, 0.0005 to 0.003 percent of O, 0.0005 to 0.004 percent of Ca and the balance of Fe. The steel for the wheels also comprises 0.006 to 0.015 mass percent of S. And in a smelting process, Ca modification treatment is performed on impurities. The steel has the advantage of high fracture toughness.

Description

technical field [0001] The invention belongs to the technical field of high-speed railway steel, in particular to steel for high-speed railway vehicle wheels. Background technique [0002] The planning and construction of high-speed railway is a major basic project related to the long-term development of my country's national economy. As one of the core technologies for the development of high-speed wheel-rail railways, the research on steel for high-speed train wheels has become a very urgent task. Compared with maglev technology, the difficulty and focus of developing high-speed wheel-rail railway technology is how to ensure the safety and service life of wheel-rail under high-speed operating conditions. [0003] Internationally, trains with a running speed exceeding 200km / h are usually called high-speed trains. The research results show that when the running speed exceeds 120km / h, the dynamic conditions of the train change significantly, and the service conditions of th...

AI Technical Summary

Problems solved by technology

However, due to various reasons, this steel is still in the experimental stage and has not been officially used.

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