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Cored wire for steelmaking

A technology of cored wire and core powder, which is applied in the field of iron and steel metallurgical auxiliary materials, can solve cumbersome problems, achieve the effects of reducing waste products, improving yield, and significant economic benefits

Inactive Publication Date: 2014-05-14
无锡市锡山区鹅湖镇益民拉丝辅机厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it can isolate the cored wire from the air and directly contact the calcium alloy powder to a certain extent, preventing the calcium alloy powder from absorbing moisture, but because the calcium itself is not treated, this problem is still not fundamentally avoided, and its preparation process Involves two different core powders, which is relatively cumbersome

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A cored wire for steelmaking, the cored wire includes a wire body formed by wrapping core powder with an outer shell, the outer shell is made of iron material, the core layer is a cored wire alloy compound, and the alloy compound is composed of The following components in parts are composed of: 68 parts of passivating calcium powder, 25 parts of silicon powder and 20 parts of iron powder. The preparation method of the passivating calcium powder is: mixing oxalic acid, calcium chloride and water to form a passivating solution , heated to 50°C, then pour the passivation solution into the calcium powder, stir until the material is dry, and after natural cooling, the passivation calcium powder is obtained, wherein the passivation agent oxalic acid and calcium chloride are used in a weight ratio of 1 : 4; the concentration of the passivation solution is 40g / L, and the weight ratio of passivation solution to calcium powder is 1: 25.

Embodiment 2

[0019] A cored wire for steelmaking, the cored wire includes a wire body formed by wrapping core powder with an outer shell, the outer shell is made of iron material, the core layer is a cored wire alloy compound, and the alloy compound is composed of The following components in parts are composed of: 72 parts of passivating calcium powder, 15 parts of silicon powder and 22 parts of iron powder. The preparation method of the passivating calcium powder is: mixing oxalic acid, calcium chloride and water to form a passivating solution , heated to 60°C, then pour the passivation solution into the calcium powder, stir until the material is dry, and after natural cooling, the passivation calcium powder is obtained, wherein the passivation agent oxalic acid and calcium chloride are used in a weight ratio of 1 : 3; the concentration of the passivation solution is 50g / L, and the weight ratio of the passivation solution to calcium powder is 1: 20.

Embodiment 3

[0021] A cored wire for steelmaking, the cored wire includes a wire body formed by wrapping core powder with an outer shell, the outer shell is made of iron material, the core layer is a cored wire alloy compound, and the alloy compound is composed of The following components in parts are composed of: 69 parts of passivating calcium powder, 22 parts of silicon powder and 20.5 parts of iron powder; , heated to 60°C, then pour the passivation solution into the calcium powder, stir until the material is dry, and after natural cooling, the passivation calcium powder is obtained, wherein the passivation agent oxalic acid and calcium chloride are used in a weight ratio of 1 : 3.3; the concentration of the passivation solution is 47g / L, and the weight ratio of passivation solution to calcium powder is 1: 22.

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PUM

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Abstract

The invention discloses a cored wire for steelmaking. The cored wire includes a wire body formed by wrapping core powder with a shell, the shell is made of an iron material, and the core layer is a cored wire alloy composite. The alloy composite is composed of the following components by weight: 68-72 parts of passivated calcium powder, 15-25 parts of silicon powder, and 20-22 parts of iron powder. The preparation method of the passivated calcium powder includes: mixing oxalic acid, calcium chloride and water to form a passivation solution, conducting heating to 50-60DEG C, then pouring the passivation solution into the calcium powder, performing stirring till the materials are dried, and carrying out natural cooling. Specifically, the adopted passivants oxalic acid and calcium chloride are in a weight ratio of 1:3-4, the concentration of the passivation solution is 40-50g / L, and the passivation solution and the calcium powder are in a weight ratio of 1:20-25.

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgical auxiliary materials, in particular to a cored wire for steelmaking. Background technique [0002] The cored wire feeding technology is an out-of-furnace refining method that has emerged in recent years, and is widely used in the wire feeding technology of modern steelmaking. Alloy cored wire is used in steelmaking, which can purify molten steel, change the shape of inclusions, improve the castability and mechanical properties of molten steel, and can significantly increase the yield of ferroalloy, reduce the cost of steelmaking, and its economic effect is remarkable. Wire technology has greater advantages than powder spraying and directly adding alloy blocks: 1. The composition of molten steel can be fine-tuned and controlled by the wire feeding method (for example, B, Ti elements), and the alloy yield is greatly improved (Ca can be close to 30%). 2. The molten steel is proc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/00C21C7/04
Inventor 徐建新
Owner 无锡市锡山区鹅湖镇益民拉丝辅机厂