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Alloy steel manufacturing method

A manufacturing method and alloy steel technology, applied in the field of alloy steel manufacturing, can solve the problems of reduced processing efficiency and productivity, reduced phosphorus control ability, increased phosphorus content, etc., to improve processing efficiency and productivity, suppress temperature drop, reduce pollution and The effect of processing time

Pending Publication Date: 2021-03-09
浦项股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the converter end point temperature is kept high, there are limitations in that phosphorus (P) control ability decreases during converter refining and the phosphorus content in molten steel increases
[0006] In addition, in order to increase the manganese content, manganese-containing ferroalloys (FeMn) are mainly injected into molten steel, but there is a limitation in that the phosphorus content in manganese-containing ferroalloys is increased for the subsequent composition adjustment process (ladle furnace (LF) ) or the time of the degassing process increases, so the processing efficiency and productivity decrease

Method used

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Embodiment Construction

[0032] Hereinafter, embodiments of the present invention will be described in detail. This disclosure may, however, be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0033] figure 1 It is a block diagram conceptually showing an apparatus for manufacturing alloy steel by an alloy steel manufacturing method according to an embodiment of the present invention.

[0034] refer to figure 1 , The alloy steel manufacturing equipment according to one embodiment of the present invention may include: a first melting furnace 110 for manufacturing a first molten iron alloy containing manganese (Mn); A molten iron alloy is stored at a temperature not lower than the melting point; a second melting furnace 210 for producing a second molten iron alloy containin...

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Abstract

The present invention relates to an alloy steel manufacturing method comprising the processes of: preparing a first molten ferroalloy containing manganese; preparing a second molten ferroalloy containing chromium; preparing a molten steel; mixing the first molten ferroalloy and the second molten ferroalloy to produce a third molten ferroalloy; and pouring the third molten ferroalloy into the molten steel to manufacture an alloy steel, wherein the converter endpoint temperature of the molten steel is reduced to improve a phosphorus controlling potential upon refining in the converter, thereby effectively controlling a phosphorus concentration in the molten steel.

Description

technical field [0001] The present invention relates to a method for manufacturing alloy steel, and more particularly, relates to a method for manufacturing alloy steel capable of improving the cleanliness of alloy steel and improving processing efficiency. Background technique [0002] Generally, high manganese steel means steel containing about 1% to 5% by weight of manganese. Recently, while high-functional products such as high-strength high-formability steel materials for vehicles, steel materials for LNG tanks, etc. have been developed, high-manganese steels having an increased manganese content of about 24% by weight are being produced . [0003] Among them, steel materials used for LNG tanks are characterized by high toughness at low temperatures. When LNG tanks are manufactured using steel materials for LNG tanks, welded parts inevitably occur, but LNG tanks can be used as actual products only when deterioration of toughness and occurrence of cracks in welded part...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C33/04C22C1/02C22C38/38
CPCC22C38/38C22C33/04C22C1/02C22C38/00C22C38/04C22C38/18C21C5/5264C21C7/0006C22C1/03C22C33/06C22C35/005C21C7/0645Y02P10/20
Inventor 韩雄熙尹汝善姜秀昌孙正焕
Owner 浦项股份有限公司