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Antimony-containing weathering steel and smelting method and application thereof

A smelting method and technology of weathering steel, applied in the field of steelmaking, can solve the problems of zero yield, alloying of Sb elements, etc.

Active Publication Date: 2020-08-11
SHOUGANG CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a method for smelting antimony-containing weathering steel to solve the problem in the prior art that the Sb element is alloyed and the yield is almost zero

Method used

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  • Antimony-containing weathering steel and smelting method and application thereof
  • Antimony-containing weathering steel and smelting method and application thereof
  • Antimony-containing weathering steel and smelting method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] 1) End point C of electric furnace smelting: 0.07%, molten steel temperature: 1633°C; aluminum-iron deoxidation is added during the tapping process, and the oxygen activity of molten steel at LF station is 5ppm;

[0062] 2) LF refining, feeding aluminum wire into the molten steel, adjusting the content of C, Si, Mn, Cu, P, S elements to the control range, adding aluminum particles + calcium carbide to the slag surface for indirect deoxidation, refining slag basicity R = 4.7, slag Each component and the mass fraction of each component are: CaO: 52.3%, SiO 2 : 11.1%, MgO: 8.6%, Al 2 o 3 : 23.7%, the rest are impurities. The mass fractions of each element in the sampled molten steel during the LF refining process are shown in Table 1;

[0063] Table 1

[0064] Sampling location and time C / ％ Si / % Mn / % Cu / % P / ％ S / ％ Alt / % End point of electric furnace smelting 0.07 - - 0.05 0.003 0.032 - LF first sample 0.13 0.13 0.74 0.28 0.006 ...

Embodiment 2

[0073] 1) End point C of electric furnace smelting: 0.08%, molten steel temperature: 1631°C; aluminum-iron deoxidation is added during the tapping process, and the oxygen activity of molten steel at LF station is 4ppm;

[0074] 2) LF refining, feeding aluminum wire into the molten steel, adjusting the content of C, Si, Mn, Cu, Ni, Cr, P, and S elements to the control range, adding aluminum particles to the slag surface for indirect deoxidation, and refining slag basicity R = 5.2 , the components of the slag and the mass fraction of each component are: CaO: 54.5%, SiO 2 : 10.48%, MgO: 8.9%, Al 2 o 3 : 21.7%, the rest are impurities. The mass percentages of each element in the sampled molten steel during the LF smelting process are shown in Table 3;

[0075] table 3

[0076] Sampling location and time C / ％ Si / % Mn / % Cu / % P / ％ S / ％ Alt / % End point of electric furnace smelting 0.08 - - 0.04 0.003 0.045 - LF first sample 0.14 0.12 0.73 0.2...

Embodiment 3

[0085] 1) End point C of electric furnace smelting: 0.08%, molten steel temperature: 1631°C; aluminum-iron deoxidation is added during the tapping process, and the oxygen activity of molten steel at LF station is 4ppm;

[0086] 2) LF refining, feeding aluminum wire into the molten steel, adjusting the content of C, Si, Mn, Cu, Ni, Cr, P, S elements to the control range, adding calcium carbide to the slag surface for indirect deoxidation, and refining slag basicity R = 5.2, The components of slag and the mass fraction of each component are: CaO: 52.3%, SiO 2 : 10.05%, MgO: 10.1%, Al 2 o 3 : 24.7%, the rest are impurities. The mass percentages of each element in the sampled molten steel during the LF refining process are shown in Table 5;

[0087] table 5

[0088]

[0089] 3) VD entry temperature is 1693°C, VD refining, gas pressure P = 63Pa during vacuum treatment, pressure holding time = 20min;

[0090] 4) After VD breaks the vacuum, the temperature is 1658°C, and the ...

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Abstract

The invention discloses antimony-containing weathering steel and a smelting method and application thereof. The method comprises the steps that electric furnace smelting molten steel is obtained; vacuum treatment is conducted on the electric furnace smelting molten steel, and vacuum treatment molten steel is obtained; the vacuum treatment pressure is smaller than or equal to 67Pa, and the temperature of the vacuum treatment molten steel ranges from 1635-1700 DEG C; and antimony iron is added into the vacuum treatment molten steel for component adjustment, and antimony-containing molten steel is obtained. By the adoption of the method, the components of the Sb element are uniform, the yield is 96% or above, cost is reduced, and the method is simple and easy to popularize.

Description

technical field [0001] The invention belongs to the technical field of steelmaking, and in particular relates to antimony-containing weathering steel and its smelting method and application. Background technique [0002] Weather-resistant steel, that is, weather-resistant corrosion-resistant steel, is made of ordinary carbon steel with a small amount of corrosion-resistant elements such as copper and nickel. The weather resistance is 2 to 8 times that of ordinary carbon steel. At the same time, it has the characteristics of rust resistance and corrosion resistance of components. Weathering steel is generally used in the manufacture of structural parts such as containers, railway vehicles, oil derricks, seaport buildings, oil production platforms, and chemical and petroleum equipment. For the weathering steel for making fasteners, due to the thread connection method, it has the characteristics of groove corrosion, and has more severe corrosion unfavorable conditions than the...

Claims

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Application Information

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IPC IPC(8): C22C33/06C22C38/60C21C7/10
CPCC21C7/10C22C33/06C22C38/60
Inventor 吕迺冰罗志俊孙齐松王翔代飞周洁张瑶邱智捷陈涛田志红
Owner SHOUGANG CORPORATION
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