A kind of smelting method of low carbon high manganese steel

A smelting method and technology of high manganese steel, applied in the field of metallurgy, can solve problems such as the inability to produce low-carbon high manganese steel, and achieve the effects of reducing processing burden, short time, and facilitating pouring

Active Publication Date: 2018-02-27
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Through converter-RH decarburization and LF controlled carbon increase to meet the carbon requirements, through the addition of manganese in the converter and LF furnace, the alloying of manganese is completed step by step and the yield is guaranteed, solving the problem that conventional converters and refining cannot produce low-carbon high manganese steel problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A method for smelting low-carbon high-manganese steel, the specific steps are as follows:

[0019] (1) Mix the desulfurized molten iron into the converter, which is a 100t top-blown converter. The converter is used for decarburization and dephosphorization operations, and the carbon value of the tapped steel is 0.05%, and the oxygen value is 495ppm. Boiling tapping, tapping temperature 1668°C;

[0020] (2) The temperature measured before entering the RH furnace was 1612°C, and after entering the station, vacuuming was carried out for decarburization. When the carbon is removed to 0.01%, no deoxidizer is added, the air is broken, and the ladle is hung in front of the rotary furnace. At this time, the carbon in the steel is 0.01%, and the manganese is 0.054%;

[0021] (3) Mix 22t metal manganese and 2.5t aluminum in advance and add to the converter, mix the molten steel from the RH furnace into the converter, shake the furnace three times, blow the gun for 1min40s, and...

Embodiment 2

[0025] A method for smelting low-carbon high-manganese steel, the specific steps are as follows:

[0026] (1) Mix the desulfurized molten iron into the converter, which is a 100t top-blown converter. The converter is used for decarburization and dephosphorization operations, and the carbon value of the tapped steel is 0.04%, and the oxygen value is 498ppm. Boiling tapping, tapping temperature 1670°C;

[0027] (2) The temperature measured before entering the RH furnace was 1623°C, and after entering the station, vacuuming was carried out for decarburization. When the carbon is removed to 0.01%, no deoxidizer is added, the air is broken, and the ladle is hung in front of the rotary furnace. At this time, the carbon in the steel is 0.01%, and the manganese is 0.05%;

[0028] (3) Mix 22t metal manganese and 2.4t aluminum in advance and add them to the converter, mix the molten steel from the RH furnace into the converter, shake the furnace three times, blow the gun for 1min50s,...

Embodiment 3

[0032] A method for smelting low-carbon high-manganese steel, the specific steps are as follows:

[0033] (1) Mix the desulfurized molten iron into the converter, which is a 100t top-blown converter. The converter performs decarburization and dephosphorization operations, and the carbon value of the tapped steel is 0.0422%, and the oxygen value is 497ppm. Boiling tapping, tapping temperature 1664°C;

[0034] (2) The temperature measured before entering the RH furnace was 1607°C, and after entering the station, vacuuming was carried out for decarburization. When the carbon is removed to 0.01%, no deoxidizer is added, the air is broken, and the ladle is hung in front of the rotary furnace. At this time, the carbon in the steel is 0.01%, and the manganese is 0.06%;

[0035] (3) Mix 21.5t metal manganese and 2.4t aluminum in advance and add them to the converter, mix the molten steel from the RH furnace into the converter, shake the furnace three times, blow the gun for 1min45s...

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PUM

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Abstract

The invention discloses a smelting method of low-carbon and high-manganese steel. Desulfurated molten iron is added into a converter, the end point carbon content is controlled to be 0.03-0.05%, the oxygen value of tapped steel is 400-500 ppm, and the temperature is controlled to be 1660-1680 DEG C; the temperature when molten steel enters an RH furnace is larger than 1610 DEG C, and decarburization is carried out till the carbon content is below 0.01%; the molten steel processed by the RH furnace is added into the converter, and before the molten steel is added, a mixture of manganese metal and aluminum metal is added into the converter so that alloying of manganese can be conducted; after the molten steel is added, the converter is rocked, a burning torch is put and ignited, steel is discharged after alloy in the converter is wholly molten, and the temperature is controlled to be 1600 DEG C or over; and after the steel enters an LF, if the temperature is lower than 1530 DEG C, the temperature is increased to be over 1530 DEG C firstly, and then alloying of manganese can be carried out, and the temperature when the steel is carried out of the LF is larger than 1500 DEG C. By means of the smelting method, the final manganese content in steel can be controlled to be 15-20% stably, the carbon content is controlled to be below 0.05%, and the problem that the low-carbon and high-manganese steel cannot be produced through conventional converters or refining is solved.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a method for smelting low-carbon high-manganese steel. Background technique [0002] With the increasingly fierce competition of steel products, more high value-added products have been developed, and more high manganese steel has been valued and applied. Generally speaking, high manganese steel is used in the fields of wear resistance, impact resistance and high hardness. Therefore, there are high-carbon and high-manganese steels such as TWIP steel for automobiles, and there are also wear-resistant steels such as Mn13, or steels that add B on the basis of Mn13 or further increase C and Mn. These all belong to the category of high-carbon and high-manganese steels. . There are also some steels with damping properties such as Fe-Mn or Fe-Cr steels. Taking Fe-Mn as an example, they belong to the category of low carbon and high manganese. These steels can obtain spec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/04C21C5/28C21C7/10C21C7/068
CPCC21C5/28C21C7/0006C21C7/068C21C7/10C22C38/04
Inventor 朱晓雷廖相巍郭庆涛赵成林贾吉祥刘祥李广帮曹东万雪峰
Owner ANGANG STEEL CO LTD
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