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Method for preparing aluminum-titanium-carbon intermediate alloy

A master alloy and preparation process technology, which is applied in the field of preparation of Al-Ti-C master alloy, can solve the problems of difficult alloy synthesis, short incubation period, poor wettability, etc., and achieves low production cost, short incubation period and grain size. The effect of refinement

Active Publication Date: 2005-04-06
GUIZHOU BRANCH CHINA ALUMINUM IND
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AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to propose a kind of method that can effectively improve the wettability of carbon and aluminum, add carbon at low temperature, and produce When the refiner refines the grain, the incubation period is short, which is suitable for the preparation method of Al-Ti-C master alloy which is continuously refined outside the furnace

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0010] A kind of preparation method of Al-Ti-C master alloy adopts CaC 2 As a carbon source, the preparation process is to melt aluminum in a smelting furnace, heat it to 800°C-900°C, and add CaC, which is calculated as 0.01%-5.0% of the weight of the aluminum melt, based on the amount of carbon added. 2 Add the homogeneous mixture of powder and potassium fluorotitanate whose titanium content is 2%-10% of the weight of the aluminum melt into the aluminum melt; then heat the melt to 950°C-1000°C and keep it warm for 10-30 minutes , remove the scum on the surface of the melt, and cast Al-Ti-C master alloy.

[0011] Below in conjunction with example the method of the present invention will be further described.

Embodiment 1

[0013] Melt 1.08Kg of aluminum in a melting furnace, heat up to 800°C, add the mixture of 24g calcium carbide powder and 280g potassium fluotitanate into the melt, stir 3 times for 10 minutes, and continue to heat up to 1000°C , keep warm for 0.5h, remove the liquid slag generated on the surface of the melt, and cast out of the furnace to obtain the Al-Ti-C master alloy prepared by the present invention.

Embodiment 2

[0015] The preparation method is the same as in Example 1. After melting all 1.1Kg of aluminum, heat up to 895°C, mix 24g of calcium carbide powder and 285g of potassium fluotitanate evenly, add to the melt, stir and heat up to 950°C after the mixture is completely melted, Keep it warm for 20 minutes, remove the liquid slag generated on the surface of the melt, and cast it out of the furnace.

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Abstract

One Al-Ti-C intermediate alloy preparation method, involves a kind to use in the aluminum alloy production crystal grain thin Al-Ti-C intermediate alloy production method. Its characteristic lies in with the calcium carbide does carbon source, the production craft completely dissolves after the aluminum, melts the body fever to join the electricity stone powder hydrofluotitanic acid armor the mixture, elevates temperature to 950deg.C~~1000deg.C, guarantees the wet 10~~30 minute, after melt body surface liquid state dregs casting.The invention characteristic is the raw material unites is easy, alloy production craft simple, production cost low, produces the alloy thin medicinal preparation thin crystal grain with this craft is incubation period short, specially suits outside the stove is continuously thin.

Description

technical field [0001] A method for preparing an Al-Ti-C master alloy relates to a method for producing a grain refiner Al-Ti-C master alloy used in the production of aluminum alloys. Background technique [0002] Since the 1960s, the Al-Ti-B master alloy has been a grain refiner commonly used in the aluminum industry, but through long-term application, it is found that there is TiB in the Al-Ti-B master alloy. 2 The defects of particle aggregation lead to a series of quality problems of subsequent processing products such as pinholes and fractures of foils and scratches of rolling plates. In addition, in alloys containing Zr or Cr, Zr or Cr will make TiB 2 poisoning, resulting in an uneven grain structure. Compared with Al-Ti-B, Al-Ti-C alloy, as a refiner, has an "immune" effect on alloys containing Zr, Cr and V elements, and can effectively refine their grains; in Al -In the Ti-C master alloy, TiC particles are not easy to aggregate and precipitate. [0003] Regarding...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/02C22C21/00
Inventor 任智森孟保平杨国英姚素娟张英
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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