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Preparation method of sulfur-containing aluminum-containing steel

A technology of aluminum steel and aluminum particles, which is applied in the field of preparation of sulfur-containing and aluminum-containing steel, and can solve problems affecting the continuity of pouring

Active Publication Date: 2022-01-25
建龙北满特殊钢有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the calcium content reaches a certain value, add sulfur, and sulfur reacts with calcium to produce high melting point CaS to block the continuous casting nozzle and affect the continuity of pouring.

Method used

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Examples

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Effect test

specific Embodiment approach 1

[0023] A method for preparing sulfur-containing and aluminum-containing steel, the process flow of the sulfur-containing and aluminum-containing steel is: electric furnace / converter smelting→refining LF→vacuum VD→continuous casting, the described sulfur-containing and aluminum-containing steel The composition is 0.46wt% of C, 0.25wt% of Si, 0.65wt% of Mn, 0.33wt% of Cr, 0.025wt% of Al, 0.025wt% of S, 0.012wt% of P, and the balance is Fe .

[0024] In the method for preparing sulfur-containing and aluminum-containing steel described in this embodiment, when tapping 10 tons of steel, the tapping carbon is ≥ 0.08%, the tapping temperature is 1620° C., and 100 kg of aluminum ingots are added per furnace during the tapping process.

[0025] In the method for preparing sulfur-containing and aluminum-containing steel described in this embodiment, when tapping 20 tons of steel, 700 kg of lime is added per furnace, and 300 kg of deoxidizing and desulfurizing refining slag is added per ...

specific Embodiment approach 2

[0041] A method for preparing sulfur-containing and aluminum-containing steel, the process flow of the sulfur-containing and aluminum-containing steel is: electric furnace / converter smelting→refining LF→vacuum VD→continuous casting, the described sulfur-containing and aluminum-containing steel The composition is 0.43wt% of C, 0.23wt% of Si, 0.63wt% of Mn, 0.31wt% of Cr, 0.020wt% of Al, 0.020wt% of S, ≦0.015wt% of P, and the balance is Fe.

[0042] In the method for preparing sulfur-containing and aluminum-containing steel described in this embodiment, when tapping 10 tons of steel, the tapping carbon is ≥ 0.08%, the tapping temperature is 1610° C., and 80 kg of aluminum ingots are added per furnace during the tapping process.

[0043] In the method for preparing sulfur-containing and aluminum-containing steel described in this embodiment, when tapping 20 tons of steel, 700 kg of lime is added per furnace, and 300 kg of deoxidizing and desulfurizing refining slag is added per f...

specific Embodiment approach 3

[0059] A method for preparing sulfur-containing and aluminum-containing steel, the process flow of the sulfur-containing and aluminum-containing steel is: electric furnace / converter smelting→refining LF→vacuum VD→continuous casting, the described sulfur-containing and aluminum-containing steel The composition is 0.47wt% of C, 0.27wt% of Si, 0.67wt% of Mn, 0.35wt% of Cr, 0.030wt% of Al, 0.030wt% of S, ≦0.015wt% of P, and the balance is Fe.

[0060] In the method for preparing sulfur-containing and aluminum-containing steel described in this embodiment, when tapping 10 tons of steel, the tapping carbon is ≥ 0.08%, the tapping temperature is 1640° C., and 100 kg of aluminum ingots are added per furnace during the tapping process.

[0061] In the method for preparing sulfur-containing and aluminum-containing steel described in this embodiment, when tapping 20 tons of steel, 700 kg of lime is added per furnace, and 300 kg of deoxidizing and desulfurizing refining slag is added per ...

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Abstract

The invention discloses a preparation method of sulfur-containing aluminum-containing steel, and belongs to the technical field of sulfur-containing aluminum-containing steel production. The technical problem to be solved by the method is flow condensing in the preparation process of the sulfur-containing aluminum-containing steel. The technological process comprises the steps of electric furnace / converter smelting, LF refining, vacuum VD and continuous casting. The sulfur-containing aluminum-containing steel is prepared from 0.43-0.47 wt% of C, 0.23-0.27 wt% of Si, 0.63-0.67 wt% of Mn, 0.31-0.35 wt% of Cr, 0.020-0.030 wt% of Al, 0.020-0.030 wt% of S, smaller than or equal to 0.015 wt% of P and the balance Fe. After the process is improved, the number of continuous casting furnaces of the sulfur-containing and aluminum-containing steel is increased from 5 to 10, the average oxygen content is 6.5 ppm, and inclusions pass inspection according to ISO-4967 standard inspection.

Description

technical field [0001] The invention belongs to the technical field of production of sulfur-containing and aluminum-containing steel, and specifically relates to a preparation method of sulfur-containing and aluminum-containing steel. Background technique [0002] Adding appropriate sulfur content in the molten steel smelting process can effectively improve the processing performance of steel, and in order to refine the grain, usually a certain amount of aluminum is added to this type of steel. At present, sulfur-containing and aluminum-containing steels are widely used in mechanical structural steels and auto parts steels. For conventional aluminum deoxidized steel production, most need to use calcium treatment to make Al 2 o 3 Inclusions are denatured to improve the pourability of molten steel. When the calcium content reaches a certain value, sulfur is added, and sulfur reacts with calcium to produce CaS with a high melting point to block the continuous casting nozzle ...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/18C22C38/06C21C7/06C21C7/064C21C7/10C21C7/00B22D11/111B22D11/18
CPCC22C38/02C22C38/04C22C38/18C22C38/06C21C7/06C21C7/064C21C7/10C21C7/0056C21C7/0006C21C7/0087B22D11/111B22D11/18
Inventor 庞洪亮刘庆强王兴华回磊李军业郭鑫王海达
Owner 建龙北满特殊钢有限责任公司
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