Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Pearlitic rail production method

A pearlitic rail and production method technology, applied in furnaces, heat treatment equipment, manufacturing tools, etc., can solve the problems of reducing the overall service life of the rail, affecting the overall performance of the rail, affecting the flatness of the rail, and achieving good uniformity of the cooling rate , The effect of refining the pearlite lamella spacing and improving production efficiency

Active Publication Date: 2021-01-22
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] The present invention is further described below.

[0019] The pearlitic rail online processing method provided by the present invention comprises the following steps:

[0020] a. The temperature of the rolled pearlite rail is between 840-1000°C, and the rolled pearlite rail is cooled by the first cooling device;

[0021] b. Straightening the pearlitic rail cooled by the first cooling device through a high-temperature rail straightening machine;

[0022] c. Transport the straightened pearlite rail to the entrance of the heat treatment unit;

[0023] d. Put the pearlite rail into the heat treatment unit, and the temperature of the pearlite rail entering the heat treatment unit is between 760-900°C;

[0024] e. A second cooling device is installed in the heat treatment unit, and the second cooling device applies an accelerated cooling medium to the pearlite rail to reduce the temperature of the pearlite rail to 400-500°C, and stop applying after the temperature of the p...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
tensile strengthaaaaaaaaaa
elongationaaaaaaaaaa
Login to View More

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...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C21D9/04C21D1/00C21D6/00C21D8/00C22C38/02C22C38/04C22C38/24B21D3/02
CPCB21D3/02C21D1/00C21D6/002C21D6/005C21D6/008C21D8/005C21D9/0062C21D9/04C22C38/002C22C38/02C22C38/04C22C38/24
Inventor 李若曦韩振宇邹明袁俊
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com