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Cored wire for deoxidation of molten steel

A technology of cored wire and molten steel

Inactive Publication Date: 2006-07-19
INST OF METALLURGICAL TECH DONGBEI UNIV SHENYANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to meet the requirements of molten steel deoxidation and aim at the existing problems of the existing cored wire, the present invention provides a cored wire for molten steel deoxidation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Passivated calcium oxide powder and passivated calcium metal powder are used as the core material, and steel strips are used as the sheath material; the ratio of calcium oxide powder and calcium metal powder used is 3:1 by weight; the steel used The strip thickness is 0.5 mm and the width is 40 mm. During processing, passivated calcium oxide powder and passivated metal calcium powder are fed at the same time, so that the passivated calcium oxide powder and passivated metal calcium powder are uniformly mixed into core material, and the outermost steel strip is wrapped with steel strip or aluminum strip.

[0014] In the 180t ladle, the cored wire is used for the deoxidation treatment of molten steel. The wire feeding speed is 100m / min, and the wire feeding time is 8min. After inspection, the solid solution metal calcium in the steel reaches 0.0056%, and the physical and chemical indicators of the steel meet the requirements.

Embodiment 2

[0016] Passivated calcium oxide powder and passivated calcium metal powder are used as the core material, and steel strips are used as the sheath material; the ratio of the calcium oxide powder and calcium metal powder used is 5:1 by weight; the steel used The strip thickness is 0.3 and the width is 35mm.

[0017] During processing, the core material is processed into a composite structure, the central layer is a passivated metal calcium powder core, and the passivated calcium oxide powder is wrapped on the outer layer of the passivated metal calcium powder core, and the outermost steel strip is wrapped with a steel strip or an aluminum strip.

[0018] In the 180t ladle, the cored wire is used for the deoxidation treatment of molten steel. The wire feeding speed is 100m / min, and the wire feeding time is 8min. After inspection, the solid solution metal calcium in the steel reaches 0.0056%, and the physical and chemical indicators of the steel meet the requirements.

Embodiment 3

[0020] Passivated calcium oxide powder and passivated calcium metal powder are used as the core material, and aluminum strips are used as the wrapping material; the ratio of the calcium oxide powder and calcium metal powder used is 2:1 by weight; the aluminum used The strip thickness is 0.8 mm and the width is 55 mm. During processing, passivated calcium oxide powder and passivated metal calcium powder are fed at the same time, so that the passivated calcium oxide powder and passivated metal calcium powder are uniformly mixed into core material, and the outermost steel strip is wrapped with steel strip or aluminum strip.

[0021] In the 180t ladle, the cored wire is used for the deoxidation treatment of molten steel. The wire feeding speed is 100m / min, and the wire feeding time is 8min. After inspection, the solid solution metal calcium in the steel reaches 0.0054%, and the physical and chemical indicators of the steel meet the requirements.

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Abstract

The core-spun wire for liquid steel deoxidization comprises: using passive CaO powder and passive Ca powder as the inner core material by weight ratio as 2-5:1; using steel strip or aluminum strip as outer wrappage material with height 0.3-0.8mm and width 35-55mm. this product can improve Ca solution more than 0.005%, controls resction speed to prevent liquid steel splitting, and even has deep deoxidization effect.

Description

technical field [0001] The invention relates to the technical field of iron and steel smelting, in particular to a cored wire for deoxidizing molten steel. Background technique [0002] Calcium series cored wire is widely used in ladle deoxidation treatment to improve the strength and toughness of sheet steel and the electromagnetic orientation performance of high-performance silicon steel. [0003] At present, calcium alloy powder is the main packaging material for cored wire, such as silicon-calcium alloy powder, iron-calcium alloy powder, aluminum-calcium alloy powder, etc. Even if metal calcium is used, the iron-calcium mixture is used as the core material. In this method, the solubility of calcium in molten steel can only reach 0.003%. Only when the dissolved calcium in molten steel is greater than 0.005% can the properties of steel meet the following requirements: [0004] (1) Requirements for deep deoxidation; [0005] (2) The type, particle size and shape of inclu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/06
Inventor 孙中强党君祥
Owner INST OF METALLURGICAL TECH DONGBEI UNIV SHENYANG
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