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Preparation method of 400MPa-grade industrial atmosphere corrosion-resistant reinforcing steel bar

An atmospheric corrosion and industrial technology, applied in the field of corrosion-resistant steel bars, can solve the problems of industrial atmospheric corrosion-resistant steel bars that cannot take into account strength, corrosion resistance, welding performance, and cost, etc., to achieve enhanced protection effects, matrix protection, and enhanced corrosion resistance. Effect

Inactive Publication Date: 2021-08-24
宁夏钢铁(集团)有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of preparation method of 400MPa level industrial atmospheric corrosion resistant steel bar, to solve many factors such as strength, corrosion resistance, welding performance, cost and so on that the industrial atmospheric corrosion resistant steel bar in the prior art can not take into account, thus limit its popularization application problem

Method used

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  • Preparation method of 400MPa-grade industrial atmosphere corrosion-resistant reinforcing steel bar
  • Preparation method of 400MPa-grade industrial atmosphere corrosion-resistant reinforcing steel bar
  • Preparation method of 400MPa-grade industrial atmosphere corrosion-resistant reinforcing steel bar

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Embodiment 1

[0024] A kind of preparation method of 400MPa level industrial atmosphere corrosion resistant steel bar, the preparation method of described 400MPa level industrial atmosphere corrosion resistant steel bar mainly comprises the following preparation steps:

[0025] (1) Desulfurization of molten iron: control the sulfur content of molten iron leaving the station S≤0.030%;

[0026] (2) Converter smelting: Control the tapping temperature at 1700°C, and the tapping time is 7 minutes. When the tapping amount is about 1 / 4, start to add 21kg of ferrosilicon manganese and 1.5kg of silicon carbide alloy for deoxidation according to the steel flow according to the ton of steel, and then follow the Add 0.6kg vanadium-nitrogen alloy, 0.4kg ferrosilicon, 0.3kg ferrophosphorus and 8kg copper per ton of steel, and finish adding when about 3 / 4 of the steel is tapped;

[0027] (3) Argon blowing: after blowing argon for 7 minutes, adjust the step (2) that the C content in the tapping material is...

Embodiment 2

[0035] A kind of preparation method of 400MPa level industrial atmosphere corrosion resistant steel bar, the preparation method of described 400MPa level industrial atmosphere corrosion resistant steel bar mainly comprises the following preparation steps:

[0036] (8) Desulfurization of molten iron: control the sulfur content of molten iron leaving the station S≤0.030%;

[0037](9) Converter smelting: Control the tapping temperature at 1700°C, and the tapping time is 7 minutes. When the tapping amount is about 1 / 4, start to add 21kg of ferrosilicon manganese and 1.5kg of silicon carbide alloy for deoxidation according to the steel flow according to the ton of steel, and then follow the Add 0.6kg vanadium-nitrogen alloy, 0.4kg ferrosilicon, 0.3kg ferrophosphorus and 8kg copper per ton of steel, and finish adding when about 3 / 4 of the steel is tapped;

[0038] (10) Argon blowing: after blowing argon for 7 minutes, adjust the step (2) that the C content in the tapping material is...

Embodiment 3

[0046] A kind of preparation method of 400MPa level industrial atmosphere corrosion resistant steel bar, the preparation method of described 400MPa level industrial atmosphere corrosion resistant steel bar mainly comprises the following preparation steps:

[0047] (8) Desulfurization of molten iron: control the sulfur content of molten iron leaving the station S≤0.030%;

[0048] (9) Converter smelting: Control the tapping temperature at 1700°C, and the tapping time is 7 minutes. When the tapping amount is about 1 / 4, start to add 21kg of ferrosilicon manganese and 1.5kg of silicon carbide alloy for deoxidation according to the steel flow according to the ton of steel, and then follow the Add 0.6kg vanadium-nitrogen alloy, 0.4kg ferrosilicon, 0.3kg ferrophosphorus and 8kg copper per ton of steel, and finish adding when about 3 / 4 of the steel is tapped;

[0049] (10) Argon blowing: after blowing argon for 7min, the adjustment step (2) in the tapping material, the C content is 0.1...

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Abstract

The invention discloses a preparation method of a 400MPa-grade industrial atmosphere corrosion-resistant reinforcing steel bar, and relates to the technical field of corrosion-resistant reinforcing steel bars. The 400MPa-grade industrial atmosphere corrosion-resistant reinforcing steel bar is prepared through molten iron desulphurization, converter smelting, argon blowing, continuous casting, square billet heating, rolling, controlled cooling and cooling bed air cooling. The 400MPa-grade industrial atmosphere corrosion-resistant reinforcing steel bar prepared through the method mainly comprises, 0.18-0.21% of C, 0.40-0.60% of Si, 1.30-1.50% of Mn, less than or equal to 0.030% of S, 0.08-0.15% of P, 0.20-0.40% of Cu, 0.03-0.05% of V, 0.008-0.012% of N and the balance Fe and other inevitable impurity elements. The 400MPa-grade industrial atmosphere corrosion-resistant reinforcing steel bar prepared by the invention has qualified mechanical properties and excellent corrosion resistance.

Description

technical field [0001] The invention relates to the technical field of corrosion-resistant steel bars, in particular to a method for preparing 400MPa-grade industrial atmospheric corrosion-resistant steel bars. Background technique [0002] Corrosion is known as the "cancer" of materials, and it is a common problem faced by all mankind. As a country with strong infrastructure, it is not uncommon for domestic construction steel corrosion damage to cause serious economic losses. Construction steel has been exposed to the atmosphere for a long time, and pollutants in the atmosphere have accelerated the corrosion of steel. It is of great significance to improve the atmospheric corrosion resistance of construction steel. [0003] For steel, the most common way to improve its corrosion resistance is to improve the corrosion resistance of the steel itself, surface coating protection, sacrificial anode cathodic protection, etc., using stainless steel reinforcement, stainless steel-c...

Claims

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Application Information

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IPC IPC(8): C22C33/06C21D8/08C22C38/02C22C38/04C22C38/12C22C38/16
CPCC21D8/065C21D8/08C22C33/06C22C38/001C22C38/002C22C38/02C22C38/04C22C38/12C22C38/16
Inventor 曹广江胡新福徐吉祥秦亮亮王利权郭宝来戴军李德双周辰玉周兆军吴斌
Owner 宁夏钢铁(集团)有限责任公司
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