Rare earth Al-Ca-Fe alloy for rare earth micro-treated steel and preparation method thereof

A technology for micro-processing steel and rare earth aluminum, which is applied in the field of ferroalloys, can solve problems affecting production and steel quality, alloy cost increase, consumption, etc., and achieve the effects of alloy cost reduction, physical quality improvement, and reduction of rare earth content

Inactive Publication Date: 2012-11-07
包头市北科创业高新材料有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conversely, too much rare earth addition will generate too many rare earth inclusions, which will affect the production flow and steel quality, and at the same time consume rare earth resources and significantly increase the cost of the alloy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) Weigh 15Kg of aluminum block and 5Kg of rare earth metal, and melt in a vacuum induction furnace for 45 minutes. After melting, mix uniformly for 6 minutes and cast out of the furnace to form a rare earth aluminum initial alloy. The temperature of the whole smelting process is controlled at 970°C. The initial alloy composition is: aluminum 79.3%, rare earth 20.3%, and the balance is impurities brought by the smelting process.

[0018] (2) Weigh 15Kg of aluminum block and melt it in an induction furnace with a protective atmosphere for 45 minutes. After melting, gradually add 5Kg of calcium metal, mix evenly for 5 minutes, and cast it into an aluminum-calcium master alloy. The temperature of the whole smelting process is controlled at 1020°C. The composition of the master alloy is: aluminum 77.1%, calcium 22.5%, and the balance is impurities brought by the smelting process.

[0019] (3) Select 48Kg of high-quality iron and melt it in an intermediate frequency furna...

Embodiment 2

[0022] (1) Weigh 60Kg of aluminum block and 20Kg of rare earth metal, and melt in a vacuum induction furnace for 45 minutes. After melting, mix evenly for 5 minutes and cast out of the furnace to form a rare earth aluminum initial alloy. The temperature of the whole smelting process is controlled at 940°C. The initial alloy composition is: aluminum 78.1%, rare earth 21.3%, and the balance is impurities brought by the smelting process.

[0023] (2) Weigh 60Kg of aluminum block and melt it in an induction furnace with a protective atmosphere for 45 minutes. After melting, gradually add 20Kg of calcium metal, mix evenly for 5 minutes, and cast it into an aluminum-calcium master alloy. The temperature of the whole smelting process is controlled at 980°C. The composition of the master alloy is: aluminum 76.4%, calcium 22.8%, and the balance is impurities brought by the smelting process.

[0024] (3) Select 192Kg of high-quality iron and melt it in an intermediate frequency furnac...

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PUM

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Abstract

The invention relates to a rare earth Al-Ca-Fe alloy for rare earth micro-treated steel and a preparation method thereof, and belongs to the technical field of ferroalloys. The rare earth Al-Ca-Fe alloy comprises, by weight, 28-65% of aluminum, 0.5-5% of calcium, 0.1-0.99% of rare earth, less than0.05% of impurity element carbon, less than0.4% of silicon, 0.02% of sulfur, less than0.02% of phosphor, less than1% of inevitable impurities and the balance ferrum. According to the preparation method, the finished alloy which meets requirements is prepared by utilizing pure aluminum ingots, rare earth, calcium metal and low-carbon high-quality scrap steel through a three-step method smelting process of an induction furnace. The rare earth Al-Ca-Fe alloy and the preparation method have the advantages that consumption of rare earth is reduced and the cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of iron alloys, and in particular relates to a rare earth aluminum-calcium-iron alloy for rare earth micro-treated steel and a preparation method thereof. Background technique [0002] High-grade steel plates (such as: steel for automobile panels, household appliance panels, etc.) have put forward more and more strict requirements on the deep drawing performance, formability and welding performance of steel products. The research shows that the high cleanliness of molten steel is an important basis for ensuring the excellent performance of steel. At the same time, trace elements (such as: rare earth, etc.) in steel are conducive to improving key material performance indicators such as deep drawability of steel. Therefore, how to efficiently improve the cleanliness in the smelting process and at the same time make the steel contain trace elements such as rare earths is a research topic that metallurgists are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/06C22C21/00C22C1/03C22C33/06
Inventor 曲俊涛成国光
Owner 包头市北科创业高新材料有限责任公司
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