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

A bridge steel with excellent toughness and strong fatigue at extreme low temperature and its manufacturing method

A technology of extreme low temperature and manufacturing method, applied in the field of steel smelting, can solve the problems of insufficient low temperature toughness and insufficient fatigue resistance, and achieve the effects of high strength, excellent toughness, improved use safety, and short process flow.

Active Publication Date: 2021-11-02
WUHAN IRON & STEEL GRP ECHENG IRON & STEEL CO LTD
View PDF13 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to propose a method for manufacturing bridge steel with excellent toughness and strong fatigue resistance at extreme low temperature, so as to solve the problems of insufficient low temperature toughness and insufficient fatigue resistance of existing steel types at extreme low temperature below -70°C

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
  • A bridge steel with excellent toughness and strong fatigue at extreme low temperature and its manufacturing method
  • A bridge steel with excellent toughness and strong fatigue at extreme low temperature and its manufacturing method
  • A bridge steel with excellent toughness and strong fatigue at extreme low temperature and its manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0039] It should be noted that, as used herein, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or system comprising a set of elements includes not only those elements, It also includes other elements not expressly listed, or elements inherent in the process, method, article, or system. Without further limitations, an element defined by the phrase "comprising a..." does not preclude the presence of additional identical elements in the process, method, article or system comprising that element.

[0040] The serial numbers of the following embodiments of the present invention are only for description, and do not represent the advantages and disadvantages of the embodiments.

[0041] In this document, the use of the words first, second, and third etc. does not indicate any order. These words can be interpreted as names.

[0042] It should be understood that the specific embodime...

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
tensile strengthaaaaaaaaaa
fatigue strengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a bridge steel with excellent toughness and strong fatigue at extreme low temperature and a manufacturing method thereof. The components of the bridge steel include C, Si, Mn, P, S, Nb, Cu, Cr, N, Al and Re , and Cu, Cr and Ni satisfy: Cu+Cr+Ni≤2.91, the balance is Fe and unavoidable impurity elements; the technical solution provided by the invention, through the design of high Mn and high Si element content, high Mn increases the yield of steel Strength and tensile strength, high Si improves the fatigue strength of steel, and through the mixed addition of Cu, Cr and Ni, it can enhance the rust protection performance of steel, improve the corrosion resistance of steel, inhibit local corrosion, and add rare earth element Re Improve the fatigue performance and low-temperature toughness of the steel grade, so that it is suitable for the northern arctic regions where the ambient temperature is required to reach -80°C and above, which can ensure a safe service life and improve the safety of use.

Description

technical field [0001] The invention relates to the technical field of steel smelting, in particular to a method for manufacturing bridge steel with excellent toughness and strong fatigue resistance at extreme low temperatures. Background technique [0002] With the development of the country's economic construction, large bridges are developing rapidly in the direction of large spans and heavy loads, and the application proportion of steel structure bridges is increasing. The span of railway bridges has been increased from 128m to 1092m, and the strength grade of steel grades has been increased from 235MPa to 690MPa. With the increase of bridge spans, the research and development of high-performance bridge steels has become extremely urgent. While increasing the strength, the service life and safety of steel structure bridges are becoming more and more important, which is the primary factor considered by designers. When steel structure bridges are subjected to dynamic load...

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): C22C38/02C22C38/06C22C38/34C22C38/42C22C38/48C22C38/58C21D8/02C21D1/18C21C7/10C21C7/064C21C7/00
CPCC21C7/0006C21C7/0056C21C7/0645C21C7/10C21D1/18C21D8/0226C22C38/002C22C38/005C22C38/02C22C38/06C22C38/34C22C38/42C22C38/48C22C38/58
Inventor 董中波邹德辉卜勇余宏伟战国锋陈英易勋鲍海燕
Owner WUHAN IRON & STEEL GRP ECHENG IRON & 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