Titanium-calcium-silicon core-spun yarn and application thereof, titanium alloying molten steel and preparation method thereof, and titanium-containing alloy steel

A technology of cored wire and titanium alloy is applied in the fields of titanium calcium silicon cored wire and its application, titanium alloyed molten steel and its preparation, and titanium-containing alloy steel, which can solve the problems of little research on titanium cored wire, etc. Achieve high yield strength and tensile strength, improve molten steel quality, and high recovery rate

Active Publication Date: 2014-07-09
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] It can be seen that the core material of the cored wire studied in the prior art is mainly calcium, niobium, vanadium, boron and other elements, but there is little research on the cored wire containing titanium

Method used

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  • Titanium-calcium-silicon core-spun yarn and application thereof, titanium alloying molten steel and preparation method thereof, and titanium-containing alloy steel

Examples

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preparation example Construction

[0041] The invention provides a method for preparing titanium-alloyed molten steel, which comprises: feeding the titanium-calcium-silicon cored wire of the invention into molten steel to be titanium-alloyed for titanium alloying.

[0042] According to the preparation method of the present invention, preferably, the molten steel to be alloyed with titanium is molten steel that has been alloyed with carbon, silicon and manganese, and the temperature of the molten steel to be alloyed with titanium is 1550-1600°C.

[0043] According to the preparation method of the present invention, in order to facilitate the rapid feeding of the cored wire into molten steel, and at the same time in order to improve the yield strength and tensile strength of the titanium alloy steel, titanium alloying is preferably carried out under dynamic conditions. Shaking or turning can be realized, for example, the steel ladle can be shaken while the cored wire is fed into the molten steel in the ladle throu...

Embodiment 1

[0056] A cored wire A1 (with an outer diameter of 12mm), including a core layer and an outer layer wrapping the core layer. The core layer is made of calcium silica powder (brand name Ca31Si60, particle size ≤ 2mm, Ca content in calcium silica powder is 31 % by weight, the content of Si is 58% by weight, the content of C is <0.8% by weight, the content of S is <0.05% by weight, the content of P is <0.04% by weight, and the content of Al is 2% by weight), iron titanium powder (brand FeTi70, particle size ≤ 1.5 mm, containing 67% by weight of Ti, <0.5% by weight of C, <0.05% by weight of S, and the balance being Fe), the outer layer is made of cold-rolled strip steel (grade St12) (thickness 1mm), The weight ratio of the titanium-iron powder to the calcium-silica powder is 5:1.

Embodiment 2

[0058] A cored wire A2 (with an outer diameter of 12mm), including a core layer and an outer layer wrapping the core layer. The core layer is made of calcium silica powder (brand name Ca31Si60, particle size ≤ 2mm, Ca content in calcium silica powder is 28 % by weight, Si content is 55% by weight, C content is <0.8% by weight, S content is <0.05% by weight, P content is <0.04% by weight, Al content is 2% by weight), iron titanium powder (grade FeTi60, particle size ≤ 1.5 mm, containing 58% by weight of Ti, <0.5% by weight of C, <0.05% by weight of S, and the balance being Fe), the outer layer is made of cold-rolled strip steel (brand St12) (thick 2mm), the weight ratio of titanium-iron powder to calcium-silica powder is 8:1.

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Abstract

The invention provides a titanium-calcium-silicon core-spun yarn which comprises a core layer and an outer layer wrapped outside the core layer, wherein the core layer contains titanium-iron powder and calcium-silicon powder. The invention provides application of the titanium-calcium-silicon core-spun yarn in preparing titanium alloying molten steel. The invention provides a preparation method of the titanium alloying molten steel, which comprises the following steps: feeding the titanium-calcium-silicon core-spun yarn into molten steel to be subjected to titanium alloying, and carrying out titanium alloying. The invention provides a titanium alloying molten steel prepared by the method. The invention provides a titanium-containing alloy steel which is prepared by casting the titanium alloying molten steel. In the preferable embodiment, the core-spun yarn is used for implementing titanium alloying of molten steel, and the titanium recovery rate is high and stable (80-85%), thereby effectively enhancing the quality of the molten steel.

Description

technical field [0001] The invention relates to a titanium-calcium-silicon cored wire and its application in molten steel titanium alloying, a titanium alloyed molten steel and a preparation method thereof, and a titanium-containing alloy steel. Background technique [0002] In order to ensure the various physical and chemical properties of steel, it is necessary to add alloy additives to the steel to adjust its composition to the specified range. Elements (C, Si, Mn, S or P) that are not present in ordinary steel or have a small content are all alloying elements. Alloy additives can be pure materials (nickel, copper, aluminum, graphite powder, etc.), ferroalloys (ferromanganese, ferrosilicon, ferrovanadium, ferrotitanium, etc.), or compounds of alloying elements (oxides, carbides, etc.) substances, nitrides, etc.). [0003] Ni, Mo, Cu, Co and other elements have low affinity with oxygen, so they can be added together with the charge or during the smelting process; while T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/00
Inventor 陈炼王建戈文荪常军徐权李龙曾建华蒋龙奎张开华
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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