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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  • Claims
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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, corrosio

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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[0023] Example 1

[0024] Preparation of 400 MPa-level industrial atmospheric corrosion reinforcement, the preparation method of 400 MPa-level industrial atmospheric corrosion steel bars mainly includes the following preparation steps:

[0025] (1) Iron water desulfurization: Control out of the iron sulfur content of the outbound iron sulfur content s ≤ 0.030%;

[0026] (2) Converter smelting: The steel temperature is 1700 ° C, the steel time is 7min, and the steel volume begins with the steel stream to add 21kg silicon-manganese iron, 1.5kg silicon carbide alloy, then according to the steel flow. Ton steel is added 0.6kg of vanadium nitrogen alloy, 0.4kg silicon, 0.3kg of phosphate and 8kg copper, adding about 3 / 4 of steel;

[0027] (3) Blow argon: After 7 minutes of argon, the adjustment step (2) The amount of C is 0.21%, the Si content is 0.46%, the Mn content of 1.38%, and the Cu content is 0.27%, and the Cu content is 0.27%. The V content is 0.039%, and the N content is 0.009...

Example Embodiment

[0034] Example 2

[0035] Preparation of 400 MPa-level industrial atmospheric corrosion reinforcement, the preparation method of 400 MPa-level industrial atmospheric corrosion steel bars mainly includes the following preparation steps:

[0036] (8) Iron water desulfurization: control out of the iron sulfur content of the outbound iron sulfur content s ≤ 0.030%;

[0037](9) Converter smelting: The steel temperature is 1700 ° C, the steel time is 7 minutes, and the steel flow is about 1 / 4 to start with the steel flow in accordance with tonnage steel, 1.5kg silicon carbide alloy for deoxidation, then according to according to according to according to according to according to according to Ton steel is added 0.6kg of vanadium nitrogen alloy, 0.4kg silicon, 0.3kg of phosphate and 8kg copper, adding about 3 / 4 of steel;

[0038] (10) Blow argon: After 7 minutes of argon, the adjustment step (2) The steel material is 0.21%, the Si content is 0.49%, the Mn content is 1.46%, and the P cont...

Example Embodiment

[0045] Example 3

[0046] Preparation of 400 MPa-level industrial atmospheric corrosion reinforcement, the preparation method of 400 MPa-level industrial atmospheric corrosion steel bars mainly includes the following preparation steps:

[0047] (8) Iron water desulfurization: control out of the iron sulfur content of the outbound iron sulfur content s ≤ 0.030%;

[0048] (9) Converter smelting: The steel temperature is 1700 ° C, the steel time is 7 minutes, and the steel flow is about 1 / 4 to start with the steel flow in accordance with tonnage steel, 1.5kg silicon carbide alloy for deoxidation, then according to according to according to according to according to according to according to Ton steel is added 0.6kg of vanadium nitrogen alloy, 0.4kg silicon, 0.3kg of phosphate and 8kg copper, adding about 3 / 4 of steel;

[0049] (10) Blowing argon: After 7 minutes of argon, the adjustment step (2) The steel material is 0.18%, the Si content is 0.51%, the Mn content is 0.30%, and the Cu...

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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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