Pearlitic rail production method

Abstract

The invention relates to the technical field of metal heat treatment, in particular to a pearlite steel rail production method. The pearlite steel rail production method includes the following steps that a, a pearlite steel rail after being rolled is cooled through a first cooling device; b, the pearlite steel rail is subjected to straightening treatment through a high-temperature steel rail straightening machine; c, the pearlite steel rail after being subjected to straightening treatment is conveyed to the entrance position of a heat treatment unit; d, the pearlite steel rail enters the heattreatment unit; and e, a second cooling device is arranged in the heat treatment unit, and is used for performing accelerating cooling on the pearlite steel rail. The pearlite steel rail after being pre-cooled is subjected to straightening treatment through the high-temperature steel rail straightening machine, the flatness degree of the pearlite steel rail is remarkably improved, the pearlite steel rail can conveniently enter and go out of the heat treatment unit, and the production efficiency is improved; and meanwhile, the comprehensive performance of the pearlite steel rail can be improved, the occurrence probability of the contact fatigue and damage of the pearlite steel rail is lowered, the overall service life of the steel rail is prolonged, and popularization is easy.

Description

technical field [0001] The invention relates to the technical field of metal heat treatment, in particular to a pearlite rail production method. Background technique [0002] At present, my country's railways are in a stage of rapid development. High-speed passenger railways, passenger-freight mixed railways, and heavy-duty freight railways are all undergoing rapid and large-scale construction, and the demand for steel rails is increasing. [0003] Pearlitic rails have good mechanical properties and contact fatigue resistance, and have a high service life, and are increasingly used. The production process of pearlitic steel rail is as follows: firstly, smelting by converter, LF refining, then RH vacuum treatment, continuous casting to obtain billet, and finally rolling and heat treatment for billet. At present, the rolled pearlitic rail is cooled by air cooling, the cooling rate is not uniform, the performance of the rail is poor, and it is easy to generate large residual s...

AI Technical Summary

Problems solved by technology

At present, the rolled pearlitic rail is cooled by air cooling, the cooling rate is not uniform, the performance of the rail is poor, and it is easy to generate large residual stress, which affects the straightness of the rail and increases the occurrence of contact fatigue damage probability, affect the overall performance of the rail, and reduce the overall service life of the rail