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A kind of high-strength corrosion-resistant steel bar and its manufacturing method

A manufacturing method and corrosion-resistant technology, which is applied in the field of construction steel, can solve the problems of protective layer cracking, peeling, and reducing the mechanical properties of steel bars, and achieve the effect of high-strength corrosion resistance and excellent corrosion resistance

Active Publication Date: 2021-03-16
YANCHENG LIANXIN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] On the one hand, the corrosion of steel bars reduces the mechanical properties of steel bars; on the other hand, it causes the protective layer to burst and peel off instantaneously, reducing the bonding performance between steel bars and concrete.

Method used

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  • A kind of high-strength corrosion-resistant steel bar and its manufacturing method
  • A kind of high-strength corrosion-resistant steel bar and its manufacturing method
  • A kind of high-strength corrosion-resistant steel bar and its manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A high-strength corrosion-resistant steel bar, comprising the following components in mass percentage (wt.%):

[0032]

[0033] In this embodiment, the mass ratio of V, Nb, Ti, Ce and Mo is: V:Nb:Ti:Ce:Mo=1:2:2:3:4.

[0034] A method for preparing high-strength corrosion-resistant steel bars, the specific steps are as follows:

[0035] S1: Smelting: heating scrap steel and molten iron to 1640°C in an electric furnace to completely melt them to obtain molten steel;

[0036] S2: Refining: transfer the molten steel obtained in S1 to the refining furnace, and after heating up to 1650°C, add C, Si, V, Nb, Ti, Ce, Mo, Mn and Cr elements according to the mass ratio into the refining furnace Refining in medium to obtain refined molten steel;

[0037] S3: Continuous casting: control the casting temperature to 1520°C, casting speed to 3.5m / min, and continuously cast to obtain steel slabs;

[0038] S4: Heating: Heating by a walking heating furnace. The furnace is divided int...

Embodiment 2

[0042] A high-strength corrosion-resistant steel bar, comprising the following components in mass percentage (wt.%):

[0043]

[0044]

[0045] In this embodiment, the mass ratio of V, Nb, Ti, Ce and Mo is: V:Nb:Ti:Ce:Mo=1:0.8:2:3.7:1.59.

[0046] A method for preparing high-strength corrosion-resistant steel bars, the specific steps are as follows:

[0047] S1: Smelting: heating scrap steel and molten iron to 1660°C in an electric furnace to completely melt them to obtain molten steel;

[0048] S2: Refining: transfer the molten steel obtained in S1 to the refining furnace, and after heating up to 1700°C, add C, Si, V, Nb, Ti, Ce, Mo, Mn and Cr elements prepared according to the mass ratio into the refining furnace Refining in medium to obtain refined molten steel;

[0049] S3: Continuous casting: control the casting temperature to 1530°C, casting speed to 2.9m / min, and continuously cast to obtain steel billets;

[0050]S4: Heating: Heating by a walking heating furnac...

Embodiment 3

[0054] A high-strength corrosion-resistant steel bar, comprising the following components in mass percentage (wt.%):

[0055]

[0056] In this embodiment, the mass ratio of V, Nb, Ti, Ce and Mo is: V:Nb:Ti:Ce:Mo=1:1.5:2:2.43:3.

[0057] A method for preparing high-strength corrosion-resistant steel bars, the specific steps are as follows:

[0058] S1: Smelting: heating scrap steel and molten iron to 1680°C in an electric furnace to completely melt them to obtain molten steel;

[0059] S2: Refining: transfer the molten steel obtained in S1 to the refining furnace, and after heating up to 1750°C, add C, Si, V, Nb, Ti, Ce, Mo, Mn and Cr elements prepared according to the mass ratio into the refining furnace Refining in medium to obtain refined molten steel;

[0060] S3: Continuous casting: control the casting temperature to 1540°C, casting speed to 2.2m / min, and continuously cast to obtain steel slabs;

[0061] S4: Heating: Heating by a walking heating furnace. The furnace ...

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Abstract

The invention discloses a high-strength corrosion-resistant steel bar. The high-strength corrosion-resistant steel bar is prepared from the following raw materials in percentage by mass: 0.11% to 0.21% of C, 0.33% to 0.79% of Si, 0.01% to 0.03% of P, 0.01% to 0.03% of S, 0.28% to 1.58% of Mn, 0.18% to 0.42% of V, 0.27% to 0.63% of Nb, 0.36% to 0.84% of Ti, 0.54% to 1.26% of Mo, 0.54% to 1.26% of Ce, 0.11% to 0.56% of Cr and the balance of Fe. The invention also discloses a preparation method of the high-strength corrosion-resistant steel bar. The preparation method comprises the following steps of smelting, refining, hot rolling and surface treatment. According to the high-strength corrosion-resistant steel bar and the manufacturing method thereof which are provided by the invention, the steel bar has high strength and excellent corrosion resistance, and can be applied to buildings such as harbor wharfs, coastal and sea bridges, hydraulic buildings, ocean platforms and the like.

Description

technical field [0001] The invention relates to a high-strength corrosion-resistant steel bar and a manufacturing method thereof, belonging to the technical field of building steel. Background technique [0002] Reinforced concrete structure is a common structural form in civil engineering. Steel bars are used to bear tension and concrete is used to bear pressure. It has the advantages of firmness, durability, good fire resistance and low cost. It is the leading structure of infrastructure in my country and is widely used in Housing, water conservancy, roads, railways, dams, bridges and other related fields. [0003] However, for a long time, concrete structures have faced problems such as poor performance, low durability, and short service life, and have not exerted satisfactory expected effects. Among many causes of premature failure of concrete structures, corrosion of steel bars is the main cause of premature failure of concrete structures, followed by freezing effects o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/38C22C38/28C22C33/04C21D8/08
CPCC21D8/08C22C33/04C22C38/005C22C38/02C22C38/22C22C38/24C22C38/26C22C38/28C22C38/38
Inventor 谢吉祥刁承民张宝富赵根社徐增举展卫星王康巨佳
Owner YANCHENG LIANXIN IRON & STEEL CO LTD
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