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High-strength galvanized building floor steel and preparation method thereof

A high-strength, floor-slab technology, applied in the field of high-strength galvanized building floor steel and its preparation, can solve problems such as insufficient pressure and limited building height

Pending Publication Date: 2021-02-19
威海红光金属材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Today, high-rise buildings can be seen everywhere. As the floors are built higher and higher, the requirements for the floor slabs used in the buildings are also getting higher and higher. The existing floor slabs limit the height of the building because of insufficient pressure.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A method for preparing high-strength galvanized steel for building floors. The chemical composition of the steel for floors includes, by weight percentage, C: 0.05%, Si: 1.15%, Mn: 1.1%, Alt: 0.31%, Ti: 0.011%, Cr: 0.51%, Ni: 0.02%, S: 0.01%, P: 0.005%, N: 0.003%, the balance is Fe and unavoidable impurities;

[0014] The preparation steps are as follows: (1) Hot metal pretreatment: deep desulfurization of hot metal, control S in hot metal ≤ 0.02%; (2) Converter smelting: use top-bottom combined blowing converter smelting, P in tapping molten steel ≤ 0.01%, N ≤ 0.03 %, the temperature of tapping molten steel is 1516°C; (3) LF refining: after the slag turns white, adjust the argon gas to 1.3MPa and stir strongly for 3min, then feed aluminum wire 1.12kg / t steel, and then adjust the argon gas to 1.08MPa and strengthen Stir for 3 minutes, do not add limestone 3.1 kg / t steel and stir for 7.5 minutes; (4) RH vacuum degassing refining and slab continuous casting machine castin...

Embodiment 2

[0022] A method for preparing high-strength galvanized steel for building floors. The chemical composition of the steel for floors includes, by weight percentage, C: 0.14%, Si: 0.28%, Mn: 1.45%, Alt: 0.34%, Ti: 0.011%, Cr: 0.58%, Ni: 0.04%, S: 0.01%, P: 0.008%, N: 0.02%, the balance is Fe and unavoidable impurities;

[0023] The preparation steps are as follows: (1) Hot metal pretreatment: deep desulfurization of hot metal, control S in hot metal ≤ 0.02%; (2) Converter smelting: use top-bottom combined blowing converter smelting, P in tapping molten steel ≤ 0.01%, N ≤ 0.03 %, the temperature of tapping molten steel is 1520℃; (3) LF refining: after the slag turns white, adjust the argon gas to 1.3MPa and stir strongly for 3min, then feed aluminum wire at 1.18kg / t steel, then adjust the argon gas to 1.08MPa and strengthen Stir for 3 minutes, do not add limestone 3.45 kg / t steel and stir for 8.5 minutes; (4) RH vacuum degassing refining and slab continuous casting machine casting...

Embodiment 3

[0031] A method for preparing high-strength galvanized steel for building floors. The chemical composition of the steel for floors includes, by weight percentage, C: 0.1%, Si: 0.2%, Mn: 1.3%, Alt: 0.33%, Ti: 0.011%, Cr: 0.55%, Ni: 0.035%, S: 0.005%, P: 0.009%, N: 0.01%, the balance is Fe and unavoidable impurities;

[0032] The preparation steps are as follows: (1) Hot metal pretreatment: deep desulfurization of hot metal, control S in hot metal ≤ 0.02%; (2) Converter smelting: use top-bottom combined blowing converter smelting, P in tapping molten steel ≤ 0.01%, N ≤ 0.03 %, the temperature of tapping molten steel is 1520℃; (3) LF refining: after the slag turns white, adjust the argon gas to 1.3MPa and stir strongly for 3min, then feed aluminum wire at 1.15kg / t steel, then adjust the argon gas to 1.08MPa and strengthen Stir for 3 minutes, without adding limestone 3.3 kg / t steel and stir for 7-9 minutes; (4) RH vacuum degassing refining and slab casting by slab continuous casti...

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Abstract

The invention belongs to the technical field of steel plate preparation, and particularly relates to high-strength galvanized building floor steel. The steel comprises the chemical components including, by weight percentage, 0.03-0.15% of C, 0.1-0.3% of Si, 1.00-1.50% of Mn, 0.30-0.35% of Alt, 0.01-0.012% of Ti, 0.5-0.6% of Cr, 0.01-0.05% of Ni, less than or equal to 0.02% of S, less than or equalto 0.01% of P, less than or equal to 0.03% of N and the balance of Fe and inevitable impurities. According to the steel, Ni, Ti and Cr are added, the requirement for corrosion resisting performance is met, the yield strength of the steel is improved to 400 MPa, the tensile strength is 1000 MPa or above, and the ballistic work at the temperature of subzero 50 DEG C is 85-90 J.

Description

technical field [0001] The application belongs to the technical field of steel plate preparation, in particular to a high-strength galvanized steel for building floors and a preparation method thereof. Background technique [0002] Today, high-rise buildings can be seen everywhere. As the floors are built higher and higher, the requirements for the floor slabs used in the buildings are also getting higher and higher. The existing floor slabs limit the height of buildings because of insufficient pressure. Contents of the invention [0003] In order to solve the problems of the prior art, the application provides a high-strength galvanized building floor steel and its preparation method, the application is achieved through the following scheme: [0004] A high-strength galvanized steel for building floors, its chemical composition includes, by weight percentage, C: 0.03-0.15%, Si: 0.1-0.3%; Mn: 1.00-1.50%, Alt: 0.30-0.35%, Ti: 0.01 -0.012%, Cr: 0.5-0.6%, Ni: 0.01-0.05%, S≤0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/50C22C33/04C21D1/26C21D1/18C21D8/02
CPCC21D1/18C21D1/26C21D8/0226C21D8/0247C22C33/04C22C38/02C22C38/04C22C38/06C22C38/50
Inventor 李明桓
Owner 威海红光金属材料有限公司
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