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Magnesium-aluminum alloy core-spun yarn

A magnesium-aluminum alloy and core-wrapped wire technology, applied in the field of alloy-wrapped wires, can solve the problems of reduced oxygen content in steel, escape of magnesium vapor, etc.

Inactive Publication Date: 2007-11-28
WUHAN IRON & STEEL (GROUP) CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that magnesium vapor easily escapes from molten steel and is not easy to add into molten steel at the temperature of steelmaking, the invention provides a magnesium-aluminum alloy cored wire, which makes full use of the high solubility of Mg in molten iron The characteristics of Mg-containing alloy composite deoxidation and the use of wire feeding technology and other operations, to achieve the purpose of Mg deoxidation treatment of molten steel
During the steelmaking process, the magnesium-aluminum alloy cored wire is inserted into the molten steel by using the wire feeding machine, and the addition of magnesium can reduce the oxygen content in the steel, further refine the inclusions, and solve the problems of clean steel.

Method used

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specific Embodiment approach 1

[0010] Embodiment 1: The magnesium-aluminum alloy cored wire described in this embodiment, the chemical composition of its core alloy powder in terms of mass percentage is: Mg 5-13%, Al 11-14%, and the balance is Fe and not Avoid impurities.

[0011] The preparation method of the magnesium-aluminum alloy cored wire described in this embodiment is the same as the preparation method of the existing alloy cored wire. The existing alloy cored wire unit is selected, and the core material is prepared according to the above ratio. After crushing, it passes through 100-400 mesh Sieve, using thin strip steel to wrap various alloy powders into circular core wires. After refining, the wire feeding machine is used to inject the magnesium-aluminum alloy cored wire into the bottom of the ladle at a certain speed, so that the alloy is evenly dispersed in the molten steel. The wire feeding method is used to treat the molten steel, and the molten steel reflects smoothly and uniformly, avoiding...

specific Embodiment approach 2

[0012] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the chemical composition of its core alloy powder in terms of mass percentage is: 6% Mg, 12% Al (18% MgAl alloy) and 82% Fe . The test proves that the average value of the total oxygen content on the high-quality high-carbon steel slab is 15×10 -6 , the deoxidation ability is better than the original process, and the composition of the deoxidation product is close to calcium plagioclase, which improves the deformation ability of non-metallic inclusions in steel. The average number of inclusions on the slab can be reduced by 28%, the total area by 45%, the average area by 44%, and the average value of the largest diameter by 19%. This shows that the Mg treatment does have the effect of refining the size of inclusions.

specific Embodiment approach 3

[0013] Specific embodiment three: the difference between this embodiment and specific embodiment one is that the chemical composition of its core alloy powder in terms of mass percentage is: 9% Mg, 17% Al (26% MgAl alloy) and 74% Fe . The test proves that the average value of the total oxygen content on the high-quality high-carbon steel slab is 11×10 -6 , the deoxidation ability is better than the original process, and the composition of the deoxidation product is close to calcium plagioclase, which improves the deformation ability of non-metallic inclusions in steel. The average number of inclusions on the slab can be reduced by 25%, the total area by 40%, the average area by 40% and the average value of the largest diameter by 16%. This shows that the Mg treatment does have the effect of refining the size of inclusions.

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Abstract

This invention relates to a magnalium clad wire which is about the metallurgy technology field. Under the steel-making temperature the magnesium steam will transgress from the steel liquid which decrease the concentration of magnesium in the steel. This invention provides a magnalium clad wire to solve this problem. The component of the clad wire core alloy is Mg 5-13%, Al 11-14% and the residual is steel and other impurity. The high solubility characteristic of magnesium in the steel liquid is fully utilized in this invention. The complex magnesium alloy deoxidation technology and the wire-feeding technology are both used in magnesium and deoxidation of steel liquid. It could decrease magnesium gasification speed by adding high melting-point substance and controlling the magnesium concentration. The magnalium clad wire can properly solve the problem of the high magnesium steam under the steel-making temperature and Mg is easily to be oxidized by steel residue and could not add to the steel liquid.

Description

technical field [0001] The invention relates to the technical field of metallurgical engineering, in particular to an alloy cored wire. Background technique [0002] At present, deoxidizers composed of aluminum, silicon, manganese and other elements have been widely used in steelmaking production. For different steel grades, it is economical and practical to use the best deoxidizer suitable for it. Due to the strong deoxidation ability of aluminum, it is the most important deep deoxidizer in the steelmaking process. However, with the development of science and technology, people have higher and higher requirements for the quality of steel products, and steelmaking is developing in the direction of high cleanliness. Using aluminum deoxidation makes the string-shaped Al2O3 inclusions in the steel larger in size, which not only causes nodules at the nozzle, affects the smooth flow of production, but is also not easy to float and remove, thereby affecting the mechanical proper...

Claims

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Application Information

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IPC IPC(8): C21C7/06
Inventor 田青袁伟霞易卫东万恩同陈纲陈迪庆赵继宇耿恒亮李伟
Owner WUHAN IRON & STEEL (GROUP) CORP
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