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Rare earth aluminum-base alloy for steelmaking deoxidization and preparation method thereof

A technology of rare earth aluminum base alloy and rare earth aluminum, which is applied in the field of rare earth aluminum base alloy for steelmaking deoxidation and its preparation, can solve the problems of adverse effects on the performance of molten steel, improve the distribution of inclusions, simplify the production process, and reduce the oxygen content. Effect

Inactive Publication Date: 2016-06-29
UNIV OF SCI & TECH BEIJING +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Rare earth is an element with very active chemical properties, and has a strong affinity with oxygen. Directly adding rare earth to molten steel will have a violent reaction with oxygen in molten steel, causing molten steel to absorb a large amount of oxygen, which will adversely affect the performance of molten steel

Method used

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  • Rare earth aluminum-base alloy for steelmaking deoxidization and preparation method thereof
  • Rare earth aluminum-base alloy for steelmaking deoxidization and preparation method thereof

Examples

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Embodiment 1

[0028] A deoxidizer for steelmaking, the composition of which is 98% aluminum and 2% rare earth by weight.

Embodiment 2

[0030] A deoxidizer for steelmaking, the composition of which is 95% aluminum and 5% rare earth by weight.

Embodiment 3

[0032] A deoxidizer for steelmaking, the composition of which is 90% aluminum and 10% rare earth by weight.

[0033] In the preferred embodiment 1 of the present invention, the chemical composition ratio (weight %) of the prepared rare earth aluminum-based alloy for steelmaking is: 98% aluminum, 2% mixed rare earth. Its preparation steps are as follows:

[0034] 1. First, mix metal aluminum and rare earth according to the ratio of 98 to 2, and weigh 200g of mixed rare earth and 9800g of metal aluminum.

[0035] 2. Take out 4000g of the weighed aluminum metal and place it in a vacuum induction furnace, then vacuumize it to a vacuum degree of 30Pa to heat and melt the metal aluminum.

[0036] 3. Add the mixed rare earth to the molten aluminum in a vacuum environment, the temperature of the mixed rare earth is controlled at about 750°C, and the holding time is 20 minutes. Electromagnetic stirring homogenization treatment is carried out before pouring, electromagnetic stirring i...

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Abstract

The invention relates to a rare earth aluminum-base alloy for steelmaking deoxidization and a preparation method thereof. The alloy comprises the following chemical components by weight: 85-98.5% of aluminum and 1.5-15% of rare earth, wherein the rare earth can degenerate inclusion to purify molten steel, has strong deoxidizing capacity, can generate fine rare earth oxide with a high melting point in the molten steel, can serve as the core of heterogeneous nucleation to refine grains and induces the nucleation of intragranular ferrite in the subsequent machining treatment process, so that steel has good performance; the aluminum is a traditional deoxidizing agent; the rare earth elements are added into the aluminum, so that the inclusion in the molten steel can be changed while deoxidization is conducted, the molten steel is purified, and the quality of the steel is improved. A vacuum melting method is adopted in the preparation process, and accordingly the yield of the rare earth can be greatly increased.

Description

technical field [0001] The invention belongs to the field of metal materials, in particular to a rare earth aluminum-based alloy for steelmaking deoxidation and a preparation method thereof. Background technique [0002] Rare earth has a strong deoxidation ability, and rare earth can be added to steel water as a deoxidizer in the steelmaking process. Rare earth can react with oxygen and sulfur in liquid metal to form rare earth oxide or rare earth sulfide with high melting point. The finely dispersed rare earth oxide or rare earth sulfide can serve as heterogeneous nucleation core and refine the grain structure. In the subsequent processing process, it can also promote the formation of intragranular ferrite and purify the molten steel, so that the steel can obtain good performance. [0003] Rare earth is an element with very active chemical properties, and has a strong affinity with oxygen. Directly adding rare earth to molten steel will have a violent reaction with oxygen ...

Claims

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Application Information

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IPC IPC(8): C21C7/06C22C21/00C22C1/03
CPCC21C7/06C22C1/026C22C1/03C22C21/00
Inventor 朱松王自东刘鑫贵吴毅
Owner UNIV OF SCI & TECH BEIJING
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