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

High-strength, long-life bainitic flat steel for railway frogs and production method thereof

A production method and long-life technology, applied in the direction of improving process efficiency, etc., can solve problems such as limited space for improvement, and achieve the effects of reducing maintenance costs, improving efficiency, and increasing throughput

Active Publication Date: 2019-08-16
JIANGSU LIHUAI IRON AND STEEL CO LTD +1
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the bainitic frog steel that has been used in China can meet the above toughness requirements, but the tensile strength of this steel reaches 1240MPa is the limit, and the space for further improvement of the strength is limited, and the existing bainitic frog steel Fatigue life is below 200 million tons

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, long-life bainitic flat steel for railway frogs and production method thereof
  • High-strength, long-life bainitic flat steel for railway frogs and production method thereof
  • High-strength, long-life bainitic flat steel for railway frogs and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0052] Such as figure 1 The comparison of the chemical composition of the railway frog steel currently used in China and the present invention is shown.

[0053] Prepared using the following production process:

[0054] 1) Hot metal pretreatment: Using the KR desulfurization method, stir the molten iron in the molten iron ladle to form a whirlpool, and put a desulfurizer into the whirlpool to make the desulfurizer fully react with the sulfur in the molten iron, and then remove the desulfurized products through repeated slag removal to reduce the molten iron S content to ensure that the molten iron S ≤0.003% after desulfurization;

[0055] 2) Converter smelting: smelting in a top-bottom combined blowing converter of more than 100 tons, using molten iron and high-quality scrap steel as raw materials for preliminary smelting to achieve pre-removal of P, adding lime, refined slag and a variety of high-purity alloys to the steel Deoxidation and initial adjustment of composition, using sl...

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
yield strengthaaaaaaaaaa
elongation at breakaaaaaaaaaa
hardnessaaaaaaaaaa
Login to View More

Abstract

The invention discloses high-strength long-life bainite flat steel for a railway frog and a production method thereof. The high-strength long-life bainite flat steel for the railway frog comprises thechemical compositions of, by mass, 0.20-0.27% of C, 1.60-1.80% of Si, 1.70-1.80% of Mn, 1.00-1.50% of Cr, 0.50-0.60% of Mo, 0.50-0.60% of Ni, 0.04-0.10% of V, no more than 0.007% of Al, no more than0.015% of P, no more than 0.010% of S, no more than 0.15% of Cu, no more than 0.0015% of [O], no more than 0.0050% of [N], no more than 0.00015% of [H], and the balance Fe. After smelting is conductedin a conventional converter, refining is conducted in a refining device, low-alkalinity final slag is adopted for desulfurizing and inclusion removing in the refining process, after refining is conducted, RH is adopted for degassing and inclusion removeing, and after molten steel is cast into continuously cast billets, the continuously cast billets are rolled into the large-size flat steel. Compared with a high-strength frog steel supplied in the market at present, the high-strength long-life bainite flat steel for the railway frog has higher strength and toughness, the fatigue life of the frog in the complex environment can be effectively prolonged, the flux and loading capacity of the frog are improved significantly, the using efficiency is improved, and the comprehensive use cost is reduced.

Description

[0001] Technical field: [0002] The invention relates to the technical field of flat steel for railway frogs in the iron and steel industry, in particular to a high-strength, long-life bainitic flat steel for railway frogs and a production method thereof. [0003] Background technique: [0004] Railway is the main artery of the national economy, the key infrastructure and the people's livelihood project. It is the backbone of the comprehensive transportation system and one of the main modes of transportation. Its status and role in the economic and social development of our country are very important. Strengthen the construction of modern railways, expand the effective supply of railway transportation, build a modern comprehensive transportation system, and build a strong transportation country. [0005] The focus of railway transportation is towards high-speed and heavy-duty development. EMUs have taken up nearly 50% of passenger transportation, and freight capacity is constantly bei...

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): C22C38/58C22C38/02C22C38/44C22C38/46C22C38/06C22C38/42C21C1/02C21C7/06C21C7/064C21C7/10C21D8/00
CPCC21C1/02C21C7/06C21C7/064C21C7/10C21D8/005C21D2211/002C22C38/06C22C38/34C22C38/42C22C38/44C22C38/46C22C38/58Y02P10/20
Inventor 左辉郑力宁肖波翟万里石可伟王子健刘影朱小龙
Owner JIANGSU LIHUAI IRON AND STEEL CO LTD
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