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Corrosion-resistant steel bar and preparation method thereof

A corrosion-resistant, steel bar technology, applied in the field of steel bar rolling, can solve the problems of pollutant discharge of alloy elements, increase production process and production cost, environmental pollution, etc., and achieve the effect of satisfying industrial application requirements, improving comprehensive performance and simple process.

Active Publication Date: 2021-04-06
SICHUAN DESHENG GRP VANADIUM & TITANIUM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above two measures will increase the production process and production costs. At the same time, the addition of alloying elements and the spraying of coatings will also generate excess pollutant emissions, causing environmental pollution

Method used

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Examples

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Effect test

preparation example Construction

[0031]The present invention also provides a method of preparing the corrosion resistant steel bar, which weighs raw materials according to the mass of the chemical element, by ferrous desulfurization, converter smelting, steel, furnace deoxidation, continuous casting, rolling, cold bed air cooling Get corrosion resistant steel bar.

[0032]Preferably, the outlet temperature is 1500-1600 ° C.

[0033]Preferably, the temperature of the ovary deoxidation process is 1600-1700 ° C.

[0034]Preferably, during the continuous casting process, the sleeve of continuous casting is controlled at 0.8 to 1.5 m / min.

[0035]Preferably, the rolling process includes rough rolling, mold rolling, fine rolling, and the rolled rolling temperature is 1100-1200 ° C.

[0036]More preferably, the thick rolling temperature is 1050-1150 ° C.

[0037]More preferably, the temperature of the finishing is 900-1050 ° C.

[0038]Preferably, the cold bed air cooling process includes: cooling to 300 ° C to 500 ° C at a speed of from 8 ...

Embodiment 1

[0041]A corrosion-resistant steel bar, the chemical elements are based on mass percentage:

[0042]C 0.03%, Mn 0.8%, Si 0.5%, Sb 0.6%, S 0.008%, P 0.006%, CR 0.05%, Cu0.10%, Ni 0.10%, Nb 0.02%, and the rest is Fe;

[0043]Preparation:

[0044]It is weighed according to the mass percentage of the chemical element, through iron-deridation, converter smelting, steel, furnace deoxidation, continuous casting, rolling, cold bed air cooling. Wherein, the steel temperature is 1500 ° C, the outer deoxidation process temperature is 1600 ° C, and the pulse speed of the continuous casting process is 0.8 m / min, and the rolling process includes rough rolling, mold, and fine. Rolling, the rolled rolling temperature is 1100 ° C, the thick rolling temperature of 1050 ° C, the temperature of the finish is 900 ° C, the cold bed air cooling process is 8 ° C / s The speed is cooled to 300 ° C, and finally is cold to room temperature to get a steel bar.

Embodiment 2

[0046]A corrosion-resistant steel bar, the chemical elements are based on mass percentage:

[0047]C 0.04%, Mn 1.2%, Si 1.0%, Sb 1.3%, S 0.08%, P 0.01%, CR 0.08%, Cu0.12%, Ni 0.14%, Nb 0.05%, and the rest is Fe.

[0048]Preparation:

[0049]It is weighed according to the mass percentage of the chemical element, through iron-deridation, converter smelting, steel, furnace deoxidation, continuous casting, rolling, cold bed air cooling. Wherein, the steel temperature is 1600 ° C, the outer deoxidation process temperature is 1700 ° C, and the pulse speed of the continuous casting process is 1.5 m / min, and the rolling process includes rough rolling, mold, and fine. Rolling, the rolled rolling temperature is 1200 ° C, the thick rolling temperature of 1150 ° C, the temperature of the finish 1050 ° C, the cold bed air cooling process is 10 ° C / s The speed is cooled to 500 ° C, and finally is empty to room temperature to get a steel bar.

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Abstract

The invention discloses a corrosion-resistant steel bar and a preparation method thereof. The corrosion-resistant steel bar comprises the following chemical elements in percentage by mass: 0.03-0.04% of C, 0.8-1.2% of Mn, 0.5-1.0% of Si, 0.6-1.3% of Sb, 0.008-0.015% of S, 0.006-0.01% of P, 0.05-0.08% of Cr, 0.10-0.12% of Cu, 0.10-0.14% of Ni, 0.02-0.05% of Nb and the balance of Fe. The corrosion-resistant steel bar provided by the invention has excellent corrosion resistance, the preparation method is simple in process and low in cost, and industrial application requirements are met.

Description

Technical field[0001]The present invention relates to the field of steel rolling technology, and is specifically a corrosion-resistant steel bar and a preparation method thereof.Background technique[0002]With the rapid development of the building industry, the market demand for steel bars increases, but the steel bars are susceptible to the surrounding environmental corrosion atmosphere during storage and use, resulting in the failure of rust. At present, the average life expectancy of my country's buildings is only 25 ~ 30 years. It is less than 50 to 60 years of national standards, farther than in Western developed countries, such as the United States's average life expectancy is 74 years, and the UK's average life is 132 year. In order to improve the life of the building, reduce resource waste, you must start from multiple aspects, and improve the durability of building materials is an important part.[0003]At present, many steel enterprises often use two measures in order to slow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/48C22C33/04C21D8/08
CPCC22C38/48C22C33/04C21D8/08
Inventor 谢丹高华斌罗清明王银全
Owner SICHUAN DESHENG GRP VANADIUM & TITANIUM CO LTD
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