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Steel for assembling type steel structure and preparing method thereof

A steel structure and assembly technology, which is applied in the field of hot continuous rolling strip production, can solve the problems of easy cracking of cast slabs, increase the difficulty of smelting, and difficulty in industrial production, and achieve good welding performance and improve the effect of atmospheric corrosion resistance.

Inactive Publication Date: 2020-08-21
PANGANG GROUP RESEARCH INSTITUTE CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The C content in the patented construction steel is basically in the peritectic region, and the slab is prone to cracks; the content of P and S is low, which increases the difficulty of smelting; elements such as Mg, Sn and W are added to improve corrosion resistance. The impact of the addition of ions on the quality of molten steel and steel plates needs to be evaluated, and there are difficulties in actual industrial production

Method used

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  • Steel for assembling type steel structure and preparing method thereof
  • Steel for assembling type steel structure and preparing method thereof
  • Steel for assembling type steel structure and preparing method thereof

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Embodiment Construction

[0021] Specifically, the present invention provides steel for fabricated steel structures, which is composed of the following components by weight percentage: C: 0.06-0.08%, Si: 0.30-0.40%, Mn: 0.85-1.00%, P≤0.018%, S≤ 0.007%, Cu: 0.30~0.40%, Cr: 0.40~0.50%, Ni: 0.20~0.30%, V: 0.04~0.05%, Nb: 0.020~0.030%, Als: 0.015~0.050%, N: 0.0025~0.0035% %, the balance is Fe and unavoidable impurities.

[0022] C is an effective strengthening element in steel, which can dissolve into the matrix to play a role of solid solution strengthening, and can combine with V and Nb to form carbide precipitation particles, which play the role of fine grain strengthening and precipitation strengthening, and increase the carbon content. It is beneficial to increase the strength, but too high carbon content will form more coarse and brittle carbide particles in the steel, which is not good for plasticity and toughness. If the carbon content is too high, it will also segregate in the center of the steel ...

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Abstract

The invention belongs to the technical filed of hot continuous rolling strip production, and particularly relates to steel for an assembling type steel structure and a preparing method thereof. The steel for the assembling type steel structure has the good welding property, the good vibration prevention property and the good atmosphere corrosion resistance property, and the steel is composed of 0.06 to 0.08% of C, 0.30 to 0.40% of Si, 0.85 to 1.00% of Mn, not larger than 0.018% of P, not larger than 0.007% of S, 0.30 to 0.40% of Cu, 0.40 to 0.50% of Cr, 0.20 to 0.30% of Ni, 0.04 to 0.05% of V,0.020 to 0.030% of Nb, 0.015 to 0.050% of Als, 0.0025 to 0.0035% of N, and the balance Fe and inevitable impurities. The steel for the assembling type steel structure has the good welding property, the good vibration prevention property and the good atmosphere corrosion resistance property.

Description

technical field [0001] The invention belongs to the technical field of hot continuous rolling strip production, and in particular relates to steel for assembled steel structures and a preparation method thereof. Background technique [0002] Due to the green, industrialized, informatized and "light, fast, good, and economical" characteristics of the prefabricated steel structure system, coupled with the practical needs of resolving the serious excess of steel production capacity and the strategic decision of "Tibetan steel for the people", currently, The country vigorously promotes prefabricated steel structure buildings, fundamentally changing the traditional and backward production and construction methods. However, traditional steel structure materials such as carbon structural steel and low-alloy high-strength steel are not corrosion-resistant, and they need to be derusted and painted in steel structure buildings, which not only increases the cost of steel structure buil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/48C22C38/46C22C38/42C22C38/06C22C38/04C22C38/02C21D8/02
CPCC21D8/0205C21D8/0247C22C38/001C22C38/002C22C38/02C22C38/04C22C38/06C22C38/42C22C38/46C22C38/48
Inventor 崔凯禹李正荣汪创伟熊雪刚陈述高爱芳
Owner PANGANG GROUP RESEARCH INSTITUTE CO LTD
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