Railway wheels alloy

Abstract

An alloy steel is provided which is particularly suitable for the manufacture of railway wheels. The alloy mainly includes, by weight percentage, carbon 0.67-0.77, manganese 0.70-0.85, silicon 0.65-0.85, phosphorus less than 0.025, sulfur less than 0.025, chromium 0.18-0.25, molybdenum 0.08-0.12, and the rest is mainly iron. Another low-carbon alloy mainly includes in weight percentage: carbon 0.16-0.45, manganese 0.90-1.10, silicon 0.50-0.70, phosphorus less than 0.035, sulfur less than 0.035, nickel 1.0-1.5, chromium 0.40-0.60 and molybdenum 0.40-0.60.

Description

Background of the invention [0001] The present invention provides a railroad wheel alloy, and more particularly, a railroad wheel alloy that is especially useful in the manufacture of cast iron railroad wheels. [0002] In the manufacture of cast iron railway wheels, it is desirable to utilize an alloy steel which can be hardened to provide suitable wear resistance while also providing suitable pyrolysis resistance. Adding alloying elements such as chromium, manganese and molybdenum can increase the mechanical strength of steel. However, such alloy additions must be carefully selected to minimize the increase in cost and to balance the possible degradation of the properties improved by the desired addition of such alloys. [0003] Thermomechanical shelling and spalling are the two main causes of tread damage found in railway wheel operation. This tread damage has resulted in a significant degree of premature removal of the wheel from service. Thermomechanical peeling typica...

AI Technical Summary

Problems solved by technology

This thermal factor caused by braking not only creates thermal stress on the wheel, but also weakens the material's ability to withstand mechanical loads at high temperatures through reduced material strength