Method for manufacturing wrapped core wire composite low azotic acierated powder and dearated alloy powder, and method of application

A technology of deoxidizing alloy and production method, applied in the field of metal smelting, can solve the problems such as no requirement for nitrogen content of carbon increasing powder, inability to feed carbon core wire, inability to meet low nitrogen steel and other problems, and achieve high quality of molten steel and nitrogen content. Low, small nitrogen increase effect

Inactive Publication Date: 2006-04-19
董杰吉 +5
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the use of carbon-feeding core wires in steelmaking to increase the carbon content of molten steel only considers the high recovery rate and stability of carbon. For general steel types, the cost is relatively high, and there is no requirement for the nitrogen content of the carbon-increasing powder. Meet the technical requirements for the production of low-nitrogen steel; in addition, the use of carbon-feeding core wire to increase the carbon content of molten steel can only be carried out when the oxygen content in the molten steel is low. When the oxygen content is high, it cannot be carried out due to the severe boiling of the carbon-oxygen reaction. Feeding carbon core wire carbon increase operation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Example 1: The carbon powder and aluminum powder with a nitrogen content of 180ppm are fully mixed in a ratio of 1:19 to make a core material, and a high-quality steel belt is used to form a round cored wire with a diameter of 13mm through a cored wire machine. In the early stage of molten steel refining, the cored wire is fed into the molten steel through the slag layer through the wire feeder.

Embodiment 2

[0015] Example 2: The carbon powder and aluminum powder with a nitrogen content of 150ppm are thoroughly mixed in a ratio of 1:3 as the core material, and a high-quality steel belt is used to form a round cored wire with a diameter of 13mm through a cored wire machine. In the early stage of molten steel refining, the cored wire is fed into the molten steel through the slag layer through the wire feeder.

Embodiment 3

[0016] Example 3: The carbon powder and aluminum powder with a nitrogen content of 100ppm are thoroughly mixed at a ratio of 1:1 to make a core material, and a high-quality steel belt is used to form a circular cored wire with a diameter of 16mm through a cored wire machine. In the early stage of molten steel refining, the cored wire is fed into the molten steel through the slag layer through the wire feeder.

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Abstract

A low-nitrogen carburant powder-deoxidizing alloy powder cored wire for recarburizing and deoxidizing molten steel is composed of a core prepared from the mixture of low-nitrogen carburant powder and deoxidizing alloy powder, and a shell made of high-quality steel sheet (or band). It is applied by inserting it through molten slag layer into molten steel.

Description

1. Technical field [0001] The invention relates to the field of metal smelting, in particular to a production and use method of a composite cored wire of low nitrogen recarburizing powder and deoxidizing alloy powder. 2. Technical background [0002] At present, the use of carbon core wire to recarburize molten steel in steelmaking only considers the high recovery rate and stability of carbon. For general steel grades, the cost is relatively high, and there is no requirement for the nitrogen content of the recarburizer. Meet the technical requirements for the production of low-nitrogen steel; in addition, the use of carbon-fed core wire to increase the carbon of the molten steel can only be carried out when the oxygen content in the molten steel is low. When the oxygen content is high, the boiling of carbon-oxygen reaction cannot be carried out. Feed carbon core wire to increase carbon operation. There are differences between ordinary recarburizers and low-nitrogen recarburizers....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C23/24C21C7/04C21C7/06
Inventor 孙永喜李猛董杰吉徐锡坤于利国马佐仓
Owner 董杰吉
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