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High-strength low-carbon low-alloy steel for building and preparing process thereof

A low-alloy steel and preparation process technology, applied in the field of alloy steel, can solve the problems of poor strength and toughness, and achieve the effects of reducing scarce precious metals, reducing production costs, and uniform structure without defects

Inactive Publication Date: 2020-04-03
安徽旭通网络科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The prepared steel has good mechanical properties at room temperature, high strength and plasticity, excellent fire resistance and weather resistance, but its strength and toughness are not very good, and further improvement is needed

Method used

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  • High-strength low-carbon low-alloy steel for building and preparing process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A high-strength low-carbon low-alloy steel for construction, the weight percentage of each element composition is: C: 0.078%, Si: 0.13%, Mn: 0.95%, Ni: 0.72%, B: 0.019%, Zr: 0.15% , Nb: 0.08%, Re: 0.0025%, P≤0.006%, S≤0.01%, the balance is Fe and unavoidable impurities.

[0040] The preparation process of the above-mentioned high-strength low-carbon low-alloy steel for construction comprises the following steps:

[0041] (1) After batching, add each raw material into an intermediate frequency induction furnace for smelting, heat to 1590 ° C, keep warm for 10 minutes, add 0.06% of the total amount of raw materials into nano-zirconium carbide, and keep warm for 20 minutes;

[0042] (2) Deoxidize molten steel with 0.05% silicon-calcium powder, then insert aluminum wire for final deoxidation, adjust the temperature of molten steel to 1630°C, and release it from the furnace; put a modifier at the bottom of the ladle, and the amount of modifier added is the total amount of molt...

Embodiment 2

[0049] A high-strength low-carbon low-alloy steel for construction, the weight percentage of each element composition is: C: 0.09%, Si: 0.16%, Mn: 0.7%, Ni: 0.81%, B: 0.013%, Zr: 0.14% , Nb: 0.07%, Re: 0.0018%, P≤0.006%, S≤0.01%, the balance is Fe and unavoidable impurities.

[0050] The preparation process of the above-mentioned high-strength low-carbon low-alloy steel for construction comprises the following steps:

[0051] (1) After batching, add each raw material into an intermediate frequency induction furnace for smelting, heat to 1600°C, keep warm for 10 minutes, add 0.07% of the total amount of raw materials into nano-zirconium carbide, and keep warm for 20 minutes;

[0052] (2) Deoxidize molten steel with 0.05% silicon-calcium powder, then insert aluminum wire for final deoxidation, adjust the temperature of molten steel to 1620°C, and release it from the furnace; put a modifier at the bottom of the ladle, and the amount of modifier added is the total amount of molten...

Embodiment 3

[0059] A high-strength low-carbon low-alloy steel for construction, the weight percentage of each element composition is: C: 0.11%, Si: 0.13%, Mn: 0.7%, Ni: 0.6%, B: 0.021%, Zr: 0.16% , Nb: 0.07%, Re: 0.0018%, P≤0.006%, S≤0.01%, the balance is Fe and unavoidable impurities.

[0060] The preparation process of the above-mentioned high-strength low-carbon low-alloy steel for construction comprises the following steps:

[0061] (1) After batching, add each raw material into an intermediate frequency induction furnace for smelting, heat to 1580 ° C, keep warm for 10 minutes, add 0.05% of the total amount of raw materials into nano-zirconium carbide, and keep warm for 18 minutes;

[0062] (2) Deoxidize molten steel with 0.05% silicon-calcium powder, then insert aluminum wire for final deoxidation, adjust the temperature of molten steel to 1620°C, and release it from the furnace; put a modifier at the bottom of the ladle, and the amount of modifier added is the total amount of molte...

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Abstract

The invention provides high-strength low-carbon low-alloy steel for building and a preparing process thereof, and relates to the technical field of alloy steel. The alloy steel is prepared from, by weight percentage, 0.05-0.11% of C, 0.1-0.17% of Si, 0.7-1.1% of Mn, 0.6-0.85% of Ni, 0.01-0.025% of B, 0.1-0.18% of Zr, 0.06-0.09% of Nb, 0.001-0.003% of Re, 0-0.006% (including 0.006%)of P, 0-0.01% (including 0.01%) of S, and the balance Fe and inevitable impurities. The preparing process mainly comprises the steps of smelting, pouring, forging, quenching, tempering and the like. All elements in the alloy steel are reasonable in proportioning. Moreover, through the optimized preparing process, the prepared low-carbon low-alloy steel is high in strength and tenacity, has well-closed formation,is free of defect, and has high corrosion resistance and abrasive resistance. As a construction material for building engineering with excellent performance, the high-strength low-carbon low-alloy steel has a great using effect.

Description

technical field [0001] The invention relates to the technical field of alloy steel, in particular to a high-strength low-carbon low-alloy steel for construction and a preparation process thereof. Background technique [0002] Building structures can be roughly divided into four categories, namely steel structure, grid structure, reinforced concrete structure and wood structure. Since steel structure buildings have the advantages of light structure, high land utilization rate, large space, industrial production, short construction period, environmental protection, energy saving and recyclable recycling, it has become the development trend of high-rise buildings since it emerged from Europe in the 1950s. [0003] In recent years, my country's construction steel structure has achieved rapid development. Grid structures in the 1980s and light steel houses in the 1990s were rapidly applied, especially the emergence of high-rise steel structures, opening up a new field of steel s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/08C22C38/14C22C38/12C22C33/04C21C7/06C21D8/00C21D1/18
CPCC21C7/06C21D1/18C21D8/005C21D2211/005C21D2211/008C22C33/04C22C38/005C22C38/02C22C38/04C22C38/08C22C38/12C22C38/14C22C38/32
Inventor 郑西
Owner 安徽旭通网络科技有限公司
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