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

600MPa high-performance fire-resistant aseismic reinforcing steel bar for concrete and production thereof

An anti-seismic reinforcement and high-performance technology, which is applied in the field of steel manufacturing for construction, can solve problems such as inability to meet chemical composition and process performance requirements, high content of carbon, microalloys and alloys, and inconsistent microstructure, etc. Strong applicability and controllability, improved plasticity and toughness, and improved passivation and corrosion resistance

Active Publication Date: 2012-11-28
WUKUN STEEL
View PDF5 Cites 27 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the "high-strength seismic steel bar and its production method" applied by Tsinghua University, the chemical composition control C 0.08-0.35wt%, Mn 1.8-3.2wt%, there is martensite in the steel structure, which cannot meet the steel GB1499 for reinforced concrete. 2 The chemical composition and process performance requirements stipulated in the standard
Generally speaking, although there are reports on the research and development of 600MPa or HRB600 high-strength steel bars in China, there are high carbon, microalloy and alloy contents in steel, unqualified carbon equivalent, high process cost, poor seismic and weldability of steel, and poor microstructure. The structure does not meet the requirements of the GB1499.2 standard and other deficiencies

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
  • 600MPa high-performance fire-resistant aseismic reinforcing steel bar for concrete and production thereof
  • 600MPa high-performance fire-resistant aseismic reinforcing steel bar for concrete and production thereof
  • 600MPa high-performance fire-resistant aseismic reinforcing steel bar for concrete and production thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A. Molten steel smelting: After adding molten iron, scrap steel and pig iron into a 50-ton LD oxygen converter, carry out conventional top-bottom composite blowing, and then add commercially available active lime, light-burned dolomite and magnesite balls according to conventional quantities for slagging; The carbon content at the control end point is 0.04wt%, and the tapping temperature is 1668°C; before tapping, add refining slag and fluorite to the bottom of the ladle, and the amount of refining slag added is: 1.6kg / t 钢 , the amount of fluorite added: 0.4kg / t 钢 ;The conventional slag washing and full bottom argon blowing process are adopted when tapping the steel, and the argon flow rate is controlled at 50NL / min. When the molten steel in the ladle is greater than 1 / 4, the following substances are added to the ladle in turn: 1.0kg / t 钢 Add the following mass ratio of silicon-calcium-barium composite deoxidizer: Si 52.5wt%, Ca 12.3wt%, Ba 11.5wt%; according to 10.5kg / t...

Embodiment 2

[0040] A. Molten steel smelting: After adding molten iron, scrap steel and pig iron into a 50-ton LD oxygen converter, carry out conventional top-bottom composite blowing, and then add active lime, light-burned dolomite and magnesite balls to make slag as usual; the carbon at the control end point is 0.06wt%, the tapping temperature is 1665°C; adding refining slag and fluorite to the bottom of the ladle before tapping, the amount of refining slag added: 1.6kg / t 钢 , the amount of fluorite added: 0.4kg / t 钢 ; When tapping, adopt slag washing and full bottom argon blowing process, the flow rate of argon gas is controlled at 63NL / min, when the amount of molten steel in the ladle is greater than 1 / 4, add the following substances to the ladle in turn: 1.3kg / t 钢 Add the following mass ratio of silicon-calcium-barium composite deoxidizer: Si 52.5wt%, Ca 12.3wt%, Ba 11.5wt%; according to 12.8kg / t 钢 The amount of adding Mn content is 76.5wt% high-carbon ferromanganese; by 8.5kg / t 钢 The...

Embodiment 3

[0053] A. Molten steel smelting: After adding molten iron, scrap steel and pig iron into a 50-ton LD oxygen converter, carry out conventional top-bottom composite blowing, and then add active lime, light-burned dolomite and magnesite balls to make slag as usual; the carbon at the control end point is 0.07wt%, the tapping temperature is 1662°C; adding refining slag and fluorite to the bottom of the ladle before tapping, the amount of refining slag added: 1.6kg / t 钢 , the amount of fluorite added: 0.4kg / t 钢 ; When tapping, adopt slag washing and full bottom argon blowing process, the flow of argon gas is controlled at 70NL / min, when the amount of molten steel in the ladle is greater than 1 / 4, add the following substances to the ladle in turn: 1.5kg / t 钢 Add the following mass ratio of silicon-calcium-barium composite deoxidizer: Si 52.5wt%, Ca 12.3wt%, Ba 11.5wt%; according to 14.0kg / t 钢 The amount of adding Mn content is 76.5wt% high-carbon ferromanganese; by 9.2kg / t 钢 The amou...

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

No PUM Login to View More

Abstract

The invention provides a 600MPa high-performance fire-resistant aseismic reinforcement for concrete and production of the 600MPa high-performance fire-resistant aseismic reinforcement, through molten steel smelting, molten steel casting, billet controlled rolling and controlled cooling, the concrete 600MPa high-performance fire-resistant aseismic reinforcement is produced and comprises the following chemical constituents in percentage by weight: 0.15-0.20% of C, 0.45-0.65% of Si, 0.8-1.05% of Mn, 0.60-0.80% of Cr, 0.050-0.070% of V, 0.0008-0.0020% of B, no more than 0.045% of S, no more than 0.045% of P and the balance of Fe and unavoidable impurities. The 600MPa high-performance fire-resistant aseismic reinforcement has the advantages of low production cost, technological applicability, strong controllability and the like, the steel microstructure is uniformly distributed and has good form, the refining effect of ferrite is obvious, and the 600MPa high-performance fire-resistant aseismic reinforcement has high temperature shear strength which is obviously higher than common steel, and has the advantages of relatively good fire resistance, high strength, high toughness, good welding and aseismic performances and excellent combination property.

Description

[0001] technical field [0002] The invention relates to a 600MPa grade high-strength refractory and earthquake-resistant steel bar for concrete and a preparation method thereof, belonging to the technical field of steel manufacturing for construction. Background technique [0003] At present, my country is in a period of rapid industrialization and urbanization, and the construction industry has developed very rapidly and has become one of the important industries of our national economy. As the main material of building structures, construction steel is in great demand, accounting for more than 50% of steel consumption. At present, my country's construction foundation is still dominated by reinforced concrete, and the ribbed steel bars consume the most in construction steel. In 2011 alone, China produced 155 million tons of hot-rolled ribbed steel bars for construction, accounting for about 20% of steel output. With the emergence of multi-functional building structures 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
IPC IPC(8): C22C38/32C22C33/04C21D8/08
CPCY02P10/20
Inventor 陈伟赵宇张卫强庾郁梅李金柱吴光耀邓家木汪涛
Owner WUKUN STEEL
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com