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Earthquake-resistant fire-resistant and weather-resistant steel plate for high-strength building structure and preparation method thereof

A building structure, fire-resistant and weather-resistant technology, applied in the field of low-alloy high-strength construction steel, can solve the problems of high upper limit of C elements, affecting the welding performance of steel plates, affecting carbon equivalent, etc., to achieve low production process costs, prolong service life and full life The effect of service cycle and material saving

Active Publication Date: 2022-04-22
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The upper limit of the C element in this invention is relatively high, which affects the carbon equivalent and the welding performance of the steel plate

Method used

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  • Earthquake-resistant fire-resistant and weather-resistant steel plate for high-strength building structure and preparation method thereof
  • Earthquake-resistant fire-resistant and weather-resistant steel plate for high-strength building structure and preparation method thereof
  • Earthquake-resistant fire-resistant and weather-resistant steel plate for high-strength building structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 3、6 and 13

[0058] In the following examples 3, 6 and 13:

[0059] There are 5 rough rolling passes, the pass reduction rate is 10%, 11%, 12%, 12%, 12%, and the rough rolling total reduction rate is 46.3%;

[0060] There are 7 passes for finish rolling, the pass reduction rate is 15%, 15%, 17%, 20%, 20%, 16%, 15%, and the total reduction rate of finish rolling is 40.7%.

Embodiment 7、10 and 12

[0062] There are 5 rough rolling passes, the pass reduction rate is 10%, 12%, 12%, 13%, 14%, and the total rough rolling reduction rate is 52.7%;

[0063] There are 9 passes of finish rolling, and the pass reduction rate is 15%, 15%, 16%, 16%, 18%, 17%, 17%, 17%, 15%. The total reduction rate of finish rolling is 37.6%.

Embodiment 1、2、4、5、8、9、11 and 14

[0065] There are 5 rough rolling passes, the pass reduction rate is 10%, 12%, 12%, 13%, 14%, and the total rough rolling reduction rate is 48.9%;

[0066] There are 9 passes of finish rolling, the pass reduction rate is 15%, 16%, 16%, 18%, 19%, 20%, 20%, 18%, 16%, and the total reduction rate of finish rolling is 42%.

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Abstract

An anti-seismic, refractory and weather-resistant steel plate for high-strength building structures of the present invention and its preparation method, comprising components and weight percentages: C: 0.03% to 0.07%, Mn: 0.5% to 0.9%, Si: 0.10% to 0.14% , Nb: 0.015%~0.030%, Ti: 0.010%~0.015%, Cr: 0.10%~0.30%, B: 0.001%~0.003%, Cu: 0.25%~0.30%, Mo: 0.25%~0.40%, Ni : 0.45%~0.55%, P≤0.025%, S≤0.015%, the rest is Fe and impurities. The production process is: steelmaking-refining-continuous casting-slab heating-two-stage controlled rolling-controlled cooling-slow cooling-finished product, the yield strength of the finished product is 490-542MPa, the tensile strength is 635-705MPa, and the yield strength ratio is 0.73-0.79. The elongation rate is 18.5-22.0%; the impact energy is 105-180J at -20°C and 90-160J at -40°C; the DNH coefficient is 6.00-6.12%. It also meets the requirements of shock resistance, weather resistance and fire resistance and has excellent performance.

Description

Technical field: [0001] The invention belongs to the technical field of low-alloy high-strength building steel, and in particular relates to an anti-seismic, fire-resistant and weather-resistant steel plate for high-strength building structures and a preparation method thereof. Background technique: [0002] The rapid development of building steel structures has brought great opportunities to the steel manufacturing industry. However, with the improvement of design requirements and the advancement of steel structure manufacturing technology, the performance requirements for building steel plates are also increasing. In addition to the basic requirements for steel plate strength and toughness , the requirements for special properties are also increasing, that is, there are greater requirements for steel plate shock resistance (low yield ratio), resistance to large heat input welding, fire resistance and weather resistance. [0003] Ensuring the high strength of steel used in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/48C22C38/50C22C38/54C22C38/42C22C38/44C21D8/02
CPCC22C38/02C22C38/04C22C38/48C22C38/50C22C38/54C22C38/42C22C38/44C21D8/0226C21D2211/005C21D2211/002C21D2211/008C21D2211/001
Inventor 陈振业陈礼清王国栋冯阳崔君军朱雯婷赵阳
Owner NORTHEASTERN UNIV LIAONING