HRB500 hot-rolled belt rib antiseismic steel bar and preparation method thereof

A technology for hot-rolled ribbed and earthquake-resistant steel bars is applied in the field of iron and steel smelting, which can solve the problems of unqualified rolling performance, increased low-fold defects of cast slabs, and poor welding performance, and achieves excellent welding performance, low production cost, and dispersion. added effect

Inactive Publication Date: 2014-07-02
武汉钢铁有限公司
View PDF8 Cites 24 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems existing in the prior art, such as the deterioration of welding performance caused by the excessively high carbon equivalent caused by the addition of too much alloy, and the increase of low-magnification defects in the cast sla

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
  • HRB500 hot-rolled belt rib antiseismic steel bar and preparation method thereof
  • HRB500 hot-rolled belt rib antiseismic steel bar and preparation method thereof
  • HRB500 hot-rolled belt rib antiseismic steel bar and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0020] Example 1

[0021] A HRB500 grade hot-rolled ribbed seismic steel bar with a diameter of 12mm is prepared. The chemical composition of molten steel is calculated by weight percentage: C: 0.17%, Si: 0.45%, Mn: 1.27%, P: 0.031%, S: 0.024 %, V: 0.029%, N: 0.0087%.

[0022] The preparation method sequentially includes the following steps:

[0023] The steps of molten iron desulfurization, converter smelting, argon blowing, continuous casting, billet heating, rolling, controlled cooling after rolling, and cooling bed air cooling.

[0024] The molten iron desulfurization adopts the magnesium powder desulfurization process to control the sulfur content of the hot metal out of the station S≤0.030%, and the desulfurization slag in the tank is cleaned;

[0025] During converter smelting, the amount of scrap steel charged accounts for 10% of the total amount; the final slag basicity target is 2.8; the converter end point C is controlled to 0.07%; the tapping temperature is 1700℃; the tappi...

Example Embodiment

[0030] Example 2

[0031] Prepare a HRB500 grade hot-rolled ribbed seismic steel bar with a diameter of 18mm. The chemical composition of the molten steel is calculated as: C: 0.21%, Si: 0.57%, Mn: 1.36%, P: 0.034%, S: 0.027%, V: 0.033%, N: 0.0095%;

[0032] The preparation method sequentially includes the following steps:

[0033] The steps of molten iron desulfurization, converter smelting, argon blowing, continuous casting, billet heating, rolling, controlled cooling after rolling, and cooling bed air cooling.

[0034] The molten iron desulfurization adopts the magnesium powder desulfurization process to control the sulfur content of the hot metal out of the station S≤0.030%, and the desulfurization slag in the tank is cleaned;

[0035] During converter smelting, the amount of scrap steel charged accounts for 12% of the total loading; the final slag basicity target is 3.0; the converter end point C is controlled to 0.07%; the tapping temperature is 1695℃; the tapping time is 5 minut...

Example Embodiment

[0040] Example 3

[0041] Prepare a 22mm diameter HRB500 hot-rolled ribbed seismic steel bar. According to the steel composition requirements, the chemical composition of molten steel is: C: 0.23%, Si: 0.65%, Mn: 1.47%, P: 0.034%, S: 0.021% , V: 0.045%, N: 0.0129%;

[0042] The preparation method sequentially includes the following steps:

[0043] The steps of molten iron desulfurization, converter smelting, argon blowing, continuous casting, billet heating, rolling, controlled cooling after rolling, and cooling bed air cooling include:

[0044] The molten iron desulfurization adopts the magnesium powder desulfurization process to control the sulfur content of the hot metal out of the station S≤0.030%, and the desulfurization slag in the tank is cleaned;

[0045] During converter smelting, the amount of scrap steel charged accounts for 12% of the total amount of steel charged; the final slag basicity target is 3.0; the converter end point C is controlled to 0.07%; the tapping temperatu...

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
Diameteraaaaaaaaaa
Diameteraaaaaaaaaa
Diameteraaaaaaaaaa
Login to view more

Abstract

The invention discloses an HRB500 hot-rolled belt rib antiseismic steel bar and a preparation method thereof. The steel comprises the following chemical components in percentage by weight: 0.17-0.25% of C, 0.4-0.8% of Si, 1.2-1.5% of Mn, at most 0.045% of P, at most 0.045% of S, 0.028-0.045% of V, 0.008-0.014% of N, and the balance of Fe and inevitable impurity elements. The preparation method comprises the following steps: molten iron desulfurization, converter smelting, argon blowing, continuous casting, square billet heating, rolling, controlled cooling after rolling, and cooling bed air cooling. The steel has the advantages of high strength, high toughness and low manufacturing cost. The preparation technique has the advantages of simple process and low production cost.

Description

technical field [0001] The invention belongs to the technical field of iron and steel smelting, and specifically refers to a HRB500 grade hot-rolled ribbed anti-seismic steel bar and a preparation method thereof. Background technique [0002] Due to the frequent occurrence of earthquakes and other disasters, especially after the 5.12 Wenchuan earthquake, the seismic performance indicators of steel used in the construction industry have received widespread attention, and high-strength, high-yield ratio seismic steel bars will gradually become the mainstream. At present, the hot-rolled ribbed anti-seismic steel bars produced in the market all increase the yield strength and elongation of the steel bar by adding vanadium-nitrogen alloy. The disadvantages are: vanadium-nitrogen alloy is a composite alloy, and its preparation is complicated and expensive. . Before the present invention, the Chinese patent application number 200910184824.8 disclosed a 500MPa-level large-scale hot...

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): C22C38/12C22C38/60C22C33/04
Inventor 徐志东范植金朱启铭徐志吴杰龙莉周新龙张帆
Owner 武汉钢铁有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap