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Smelting method for producing high-manganese steel used in low-temperature environment by means of LF refining furnace

A smelting method and low-temperature environment technology, applied in the field of metallurgy, can solve problems such as high production costs, and achieve the effects of high manganese alloy content, high yield, and low content of oxygen and sulfur impurities

Active Publication Date: 2020-01-24
HEBEI IRON AND STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, 9Ni steel is the main steel used in low-temperature environments. 9Ni steel uses precious metal nickel as the main alloying element in the steel. 9Ni steel needs to add a large amount of precious metal nickel in the production process, and it also needs to be normalized or normalized + tempered or tempered. The quality of the delivery, so the production cost has been high, there is an urgent need to develop a new type of steel material for low temperature environment

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0026] In this embodiment, the smelting method of using LF refining furnace to produce high manganese steel for low-temperature environment includes blowing argon in the seat, deoxidizing molten steel, desulfurizing molten steel, refining slagging, adding alloy, and fine-tuning the composition temperature. The specific process steps are as follows:

[0027] (1) Argon blowing in the seat bag

[0028] a. Refining furnace seat bag, the molten steel smelted in the primary smelting furnace is sent to the LF refining furnace to ensure that there is no slag when the primary smelting furnace is tapped. If slag is splashed during tapping, slag removal treatment is required;

[0029] b. Argon blowing and stirring, the ladle seat is firmly connected to the argon gas belt, the pressure of the argon gas is controlled at 8kPa, the flow rate is adjusted to 500NL / min, and the molten steel is observed to ensure that the argon blowing is good

[0030] c. Temperature measurement and sampling, af...

Embodiment 2

[0044] In this embodiment, the smelting method of using LF refining furnace to produce high manganese steel for low-temperature environment includes blowing argon in the seat, deoxidizing molten steel, desulfurizing molten steel, refining slagging, adding alloy, and fine-tuning the composition temperature. The specific process steps are as follows:

[0045] (1) Argon blowing in the seat bag

[0046] a. Refining furnace seat bag, the molten steel smelted in the primary smelting furnace is sent to the LF refining furnace to ensure that there is no slag when the primary smelting furnace is tapped. If slag is splashed during tapping, slag removal treatment is required;

[0047] b. Argon blowing and stirring, the ladle seat is firmly connected to the argon belt, the pressure of the argon is controlled at 10kPa, the flow rate is adjusted to 400NL / min, and the tumbling of the molten steel is observed to ensure that the argon blowing is good;

[0048] c. Temperature measurement and sa...

Embodiment 3

[0062] In this embodiment, the smelting method of using LF refining furnace to produce high manganese steel for low-temperature environment includes blowing argon in the seat, deoxidizing molten steel, desulfurizing molten steel, refining slagging, adding alloy, and fine-tuning the composition temperature. The specific process steps are as follows:

[0063] (1) Argon blowing in the seat bag

[0064] a. Refining furnace seat bag, the molten steel smelted in the primary smelting furnace is sent to the LF refining furnace to ensure that there is no slag when the primary smelting furnace is tapped. If slag is splashed during tapping, slag removal treatment is required;

[0065] b. Stir with argon blowing, securely connect the argon belt to the ladle seat, control the argon pressure at 9kPa, adjust the flow rate to 450NL / min, observe the tumbling of the molten steel, and ensure that the argon blowing is good;

[0066] c. Temperature measurement and sampling, after blowing argon in ...

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Abstract

The invention discloses a smelting method for producing high-manganese steel used in a low-temperature environment by mean of an LF refining furnace. The smelting method comprises the steps of stationary ladle argon blowing, molten steel deoxygenation, molten steel desulfurization, refining and slagging, alloy adding and fine adjustment of composition temperature. According to the smelting method,the technical problems such as high steelmaking production difficulty due to high manganese alloy content and low oxygen and sulfur content of the high-manganese steel used in the low-temperature environment are solved, a practical solution is provided for the LF refining production in large-scale production of the high-manganese steel used in the low-temperature environment, and the smelting method can be widely used in steelmaking production of the high-manganese steel. According to the high-manganese steel molten steel produced through the smelting method, the content of Mn is larger thanor equal to 22.5%, the content of O is less than or equal to 0.0030%, the content of S is less than or equal to 0.003%, the manganese alloy yield is larger than or equal to 96%, and the smelting method meets the technical requirements of high manganese alloy content, high yield and low oxygen sulfur impurity content.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a smelting method for producing high-manganese steel for low-temperature environments with an LF refining furnace. Background technique [0002] At present, 9Ni steel is the main steel used in low-temperature environments. 9Ni steel uses precious metal nickel as the main alloying element in the steel. 9Ni steel needs to add a large amount of precious metal nickel in the production process, and it also needs to be normalized or normalized + tempered or tempered. Therefore, the production cost has been high, and it is urgent to develop a new type of steel material for low temperature environment. [0003] High-manganese steel for low-temperature environment is to add a large amount of manganese alloy to the steel to make it present austenite structure characteristics at low temperature, avoid the phenomenon of steel plate becoming brittle at low temperature, and main...

Claims

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Application Information

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IPC IPC(8): C21C7/072C21C7/00C21C7/06C21C7/064C22C33/04C22C38/02C22C38/04C22C38/20C22C38/38
CPCC21C7/0006C21C7/06C21C7/064C21C7/072C22C33/04C22C38/02C22C38/04C22C38/20C22C38/38
Inventor 赵燕青孙力赵喜伟莫德敏杨浩田志强李双江陈振业马娥龙杰庞辉勇
Owner HEBEI IRON AND STEEL
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