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

High-strength and highly fatigue-resistant steel rail and production method thereof

a production method and high-strength technology, applied in the field of high-strength, highly wear-resistant, and highly contact fatigue-resistant steel rails and production methods thereof, can solve the problems of increasing the need for high contact fatigue resistance performance and high wear resistance performance of freight railways

Inactive Publication Date: 2016-07-07
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP +1
View PDF2 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a strong and durable steel rail with high resistance to wear and contact fatigue. Compared to previous inventions, the present invention has a pearlite structure without any risk of horizontal cracks in the rail web. The production process is compact and energy-efficient, with no secondary heating required. The cooling of the rail head is more uniform, resulting in a greater depth of hardened layer.

Problems solved by technology

In addition, as the axle load on freight railways is increased continuously, the need for high wear resistance performance and high contact fatigue resistance performance of freight railways becomes more urgent.

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • High-strength and highly fatigue-resistant steel rail and production method thereof
  • High-strength and highly fatigue-resistant steel rail and production method thereof
  • High-strength and highly fatigue-resistant steel rail and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

example

[0043]The production procedures include: rail steel smelting in a converter-refining in a LF furnace and molten steel heating-RH composition control and homogenization-bloom continuous casting under six-strand protection-bloom heating-7-stand universal rolling-feeding the rolled steel with ends into heat treatment equipment for forced cooling-discharging from the heat-treatment equipment at 300° C.˜400° C. final cooling temperature-cooling on walking beam cooler-combined vertical and horizontal straightening-non-destructive test, cross sectional dimension and straightness inspection-combined cutting and drilling, and cutting to specified length-surface inspection-warehousing.

[0044]The temperature of the rolled part is 930° C.˜1,000° C. when the rolled part is discharged from the UF finish rolling section. To ensure the initial cooling temperature is 780° C.˜880° C., the running speed of the roller way must be increased, and relevant pause procedures must be cancelled, so that the ro...

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
temperatureaaaaaaaaaa
temperatureaaaaaaaaaa
Login to View More

Abstract

The present invention relates to a high-strength, highly wear-resistant, and highly contact-fatigue-resistant steel rail and a production method thereof, and belongs to the field of black steel manufacturing technology. The present invention provides a high-strength and highly fatigue-resistant steel rail, comprising the following chemical components by weight percentage: C: 0.76%˜0.86%; Si: 0.6%˜1%; Mn: 0.7%˜1.5%, Cr: 0.1%˜0.5%, and 0.8%≦Mn %+Cr %≦1.6%; V: 0.05%˜0.3%, Ni: 0.1%˜0.35%, and 0.15%≦V %+Ni %≦0.4%; Mo: ≦0.03%; P: ≦0.02%; S: ≦0.015%; Fe and inevitable impurities: the remaining content, wherein, the metallurgical structure of the steel rail is fine pearlite+A, where, A is proeutectoid ferrite or proeutectoid cementite, and A≦2%. The tensile strength of the obtained steel rail is 1,260 MPa˜1,420 MPa.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application claims priority to Chinese Application No. 201510006016.8, filed on Jan. 7, 2015, entitled “High-Strength and Highly Fatigue-Resistant Steel Rail and Production Method Thereof”, which is specifically and entirely incorporated by reference.FIELD OF THE INVENTION[0002]The present invention relates to a high-strength, highly wear-resistant, and highly contact-fatigue-resistant steel rail and a production method thereof, and belongs to the field of black steel manufacturing technology.BACKGROUND OF THE INVENTION[0003]With the rapid development of China's heavy haul railways, the axle load on the freight railways in China has been increased continuously. For example, the axle load on most mixed passenger and freight transport railways is 21 tons or 23 tons, the axle load on special major freight railways, such as Daqin Railway and Shuohuang Railway, is 25 tons, and the axle load on the South Central Channel, which has just be ...

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 Applications(United States)
IPC IPC(8): C21D9/04C22C38/48C22C38/46C22C38/44C22C38/04B22D11/00C22C38/00C22C33/04C21D6/00C21D8/00C21D1/613C21D1/60C22C38/50C22C38/02
CPCC21D9/04B22D11/00C22C38/48C22C38/46C22C38/44C22C38/04C22C38/02C22C38/002C22C33/04C21D6/004C21D6/005C21D6/008C21D8/005C21D1/613C21D1/60C22C38/50C21D8/0226C22C38/08C22C38/12C21D2211/009C21D2211/005C21D8/00B22D11/001
Inventor DENG, YONGGUO, HUAZOU, MINGJIA, JIHAIWANG, CHUNJIANHAN, ZHENYUYUAN, JUN
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