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Stainless steel composite corrosion-resisting reinforcement bar and preparation method thereof

A stainless steel, corrosion-resistant technology, applied in building components, structural elements, buildings, etc., can solve the problems of low cost, poor corrosion resistance, and high cost of carbon steel reinforcement, and achieve improved corrosion resistance, less investment in equipment, and high production efficiency Effect

Active Publication Date: 2011-04-13
HUNAN 3T NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that stainless steel reinforcement has good corrosion resistance but high cost; carbon steel reinforcement has low cost but poor corrosion resistance, and provides a stainless steel composite corrosion-resistant reinforcement and a preparation method thereof, which can obtain good corrosion resistance and low cost Low, mass-producible rebar

Method used

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  • Stainless steel composite corrosion-resisting reinforcement bar and preparation method thereof
  • Stainless steel composite corrosion-resisting reinforcement bar and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0035] figure 1 Among them, the stainless steel composite corrosion-resistant steel bar has a specification (that is, a diameter) of 6 mm to 40 mm. It is mainly composed of a core 1 metal and a stainless steel alloy layer 2 around it along the length of the core 1 metal. The metallurgical combination between the two , the thickness of the stainless steel alloy layer 2 is 1mm~10mm.

[0036] The metal of the core part 1 is any one of low carbon steel and low alloy steel.

[0037] The stainless steel alloy layer 2 is one of the existing austenitic stainless steel, martensitic stainless steel, ferritic stainless steel or duplex stainless steel. Austenitic stainless steel is preferred.

[0038] Prepare stainless steel composite corrosion-resistant smooth steel bars, the core 1 is carbon steel Q235, the geometric shape of the cross-section is a circle with a diameter of 10mm, the thickness of the corrosion-resistant stainless steel alloy layer 2 is 2mm, and the selection of the st...

Embodiment 2

[0048] Prepare stainless steel composite anti-corrosion smooth steel bar, the core 1 is carbon steel, the chemical composition is the same as that of commercially available HRB335 secondary steel bar, the geometric shape of the cross section is a circle with a diameter of 19mm, and the thickness of the corrosion-resistant stainless steel alloy layer 2 is 3mm , the stainless steel alloy layer 2 is selected from 06Cr17Ni12Mo2 austenitic stainless steel that conforms to the national standard GB / T 20878-2007.

[0049] (1) The carbon steel billet 3 of HRB335 secondary steel bar is produced by using the existing casting method. The length of the carbon steel billet 3 is 3m, the geometry of the cross section is circular, and the diameter is 100mm.

[0050] (2) Remove the oil stain on the surface of the carbon steel slab 3 prepared in step (1) with a 10% NaOH aqueous solution at a temperature of 80°C for 8 minutes. Then use H with a mass fraction of 10% 2 SO 4 Aqueous solution, at a...

Embodiment 3

[0058] Prepare stainless steel composite anti-corrosion smooth steel bar, the core 1 is carbon steel, the chemical composition is the same as that of commercially available HRB400 tertiary steel bar, the geometric shape of the cross section is a circle with a diameter of 24mm, and the thickness of the corrosion-resistant stainless steel alloy layer 2 is 3mm , the stainless steel alloy layer 2 is selected from 06Cr17Ni12Mo2 austenitic stainless steel that conforms to the national standard GB / T 20878-2007.

[0059] (1) Select the existing casting method to produce the carbon steel billet 3 of the HRB400 secondary steel bar, the length of the carbon steel billet 3 is 1m, the geometric shape of the cross section is square, and the side length is 120mm.

[0060] (2) Remove the oil stain on the surface of the carbon steel billet 3 prepared in step (1) with a 10% NaOH aqueous solution at a temperature of 90°C for 10 minutes. Then, it was etched with 10% HCl aqueous solution at a temp...

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Abstract

The invention relates to a stainless steel composite corrosion-resisting reinforcement bar and a preparation method thereof. By using the method, the reinforcement bar which has the advantages of good corrosion resistance, low cost, and capability of being produced in batches can be prepared. The diameter of the prepared reinforcement bar is 6 to 40mm, and the reinforcement bar mainly comprises a core metal and a stainless steel alloy layer, wherein the periphery of the core metal is coated with the stainless steel alloy layer along the length direction of the core metal, the core metal and the stainless steel alloy layer are combined in a metallurgical mode, and the thickness of the stainless steel alloy layer is 1 to 10mm.

Description

[0001] technical field [0002] The invention relates to a composite material, in particular to a stainless steel composite corrosion-resistant steel bar and a preparation method thereof. Background technique [0003] Steel bars are an important raw material for the production of reinforced concrete in the construction industry. At present, steel bars are produced with carbon steel materials. Corrosion of steel bars is one of the main reasons for the durability failure of reinforced concrete structures. In order to improve the corrosion resistance of building structures, in some important structures, such as seaside bridges, steel structure buildings, overpasses, etc., some use stainless steel reinforcement, which overcomes the need for carbon steel reinforcement in seawater and the environment that requires frequent use of snow melting salt. In the process, chloride ions penetrate through the concrete and contact the steel bars, resulting in the disadvantage of corrosion. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04C5/02B23P15/00C22C19/05C22C9/06
Inventor 孙俊生孙逸群张凌峰
Owner HUNAN 3T NEW MATERIAL
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