Steel rail integral air blast quenching experimental device

Abstract

The invention relates to a steel rail integral air blast quenching experimental device, and can solve the problems that air blast quenching can only be applied to railheads, bending deformation and residual stress are likely to occur to steel rails and experimental data have poor accuracy in the prior art. The experimental device comprises a support frame, and is characterized in that the support frame is internally provided with a transmission roller, an upper air cooling apparatus is arranged above the transmission roller, a lower air cooling apparatus is arranged below the transmission roller, and both the upper air cooling apparatus and the lower air cooling apparatus are equipped with several groups of air blast components. The upper air cooling apparatus and the lower air cooling apparatus are in flexible connection with stand columns at two ends of the support frame respectively through connection end plates at both ends. One end of the transmission roller is equipped with a steel rail reciprocating motion mechanism, and two steel rail guide mechanisms are disposed opposite to each other at two sides above the transmission roller. The experimental device provided by the invention has the characteristics of reasonable design and compact structure, can perform air blast cooling to the railhead and rail bottom of a quenched steel rail, the air blast angle and pressure are adjustable, the experimental process approaches to actual production, and the research result is accurate.

Description

technical field [0001] The invention belongs to the technical field of metallurgical experimental equipment, and specifically relates to an overall air cooling of rails that can simultaneously spray air to cool the rail head and rail bottom, the air spray angle and pressure can be adjusted, the experimental process is close to actual production, and the research results are accurate. Quenching experimental device. Background technique [0002] The high-speed, heavy-load and high-density transportation organization of the railway will inevitably lead to an increase in the wheel-rail contact stress and worsen the service conditions of the rail, thus putting forward higher requirements for the comprehensive performance of the rail. There are two effective methods for strengthening and toughening rails: alloying and heat treatment. Although the alloying method can greatly increase the strength of the rail, it is difficult to improve the toughness of the rail, and the alloyed ra...

AI Technical Summary

Problems solved by technology

[0003] At present, the air-cooling and quenching technology of rails is kept secret worldwide, and the design of the air-cooling and quenching device and the formulation of quenching process parameters lack theoretical basis, and experience can only be accumulated through a large number of experiments.

Although some scientific research institutes have developed experimental devices for air-cooling and quenching of rails, these devices can only perform air-cooling and quenching on the rail head, and do not have the ability to cool the rail bottom at the same time, so that the rail is seriously bent toward the rail head. Deformation and large residual stress

In addition, these experimental devices cannot verify the relationship between rail bottom air cooling and rail temperature field, tissue field, deformation law, and mechanical properties, which will inevitably affect the accuracy of experimental data

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