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Preparation method of Al-TiC master alloy

A master alloy and alloy technology, applied in the field of preparation of Al-Ti-C master alloy, can solve the problems of easy segregation, unstable quality, etc., and achieve the effects of improving uniformity, significant economic benefits, and improving yield

Active Publication Date: 2008-07-16
GUIZHOU BRANCH CHINA ALUMINUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing an Al-Ti-C master alloy that can effectively solve the problems of easy segregation and unstable quality in the process of alloy preparation in view of the deficiencies in the above-mentioned prior art.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The composition design weight ratio of Al-Ti-C master alloy is Al: 94.3, Ti: 4.9, C: 0.8. The powders of the above ingredients were initially stirred. In order to further improve the uniformity of the alloy, 1Kg of powder was put into a three-dimensional drum mixer with a speed of 18rpm, and the mixture was taken out after 10 minutes of mixing. It is pressed into a steel mold with an inner diameter of Ф30mm, and the pressurization pressure is designed according to 200MPa. The formed cylindrical rod is prepared by plasma welding under the protection of argon to obtain a consumable electrode. Control the setting of various process parameters in the smelting process, the initial working electrode is 0.6v, and the alloy melting rate is controlled at 1Kg·KW -1 h -1 , the current density is controlled at 22A cm -2 . The gap between the electrode and the crucible is 55mm, and the arc length is controlled at about 25mm. In order to improve the uniformity of the ingot structu...

Embodiment 2

[0020] The composition design weight ratio of Al-Ti-C master alloy is Al: 94.2, Ti: 0.9, C: 0.4. Preliminarily stir the powder with the above ingredients. In order to further improve the uniformity of the alloy, put 5Kg of powder into the three-dimensional drum mixer at a speed of 18rpm, and take it out after 15 minutes of mixing. It is pressed and formed in a steel mold with an inner diameter of Ф500mm, and the pressurized pressure is designed according to 200MPa. The formed cylindrical rod is prepared by plasma welding under vacuum protection to obtain a consumable electrode. Control the setting of various process parameters in the smelting process, the initial working electrode is 0.6v, and the alloy melting rate is controlled at 1Kg·KW -1 h -1 , the current density is controlled at 7.3A cm -2 . The gap between the electrode and the crucible is 60mm, and the arc length is controlled at about 34mm. The cast ingot is solidified and cooled to about 300°C under vacuum prote...

Embodiment 3

[0022] The composition design weight ratio of Al-Ti-C master alloy is: Al: 94.3, Ti: 4.9, C: 0.8. The process method is as follows: Preliminarily stir the powder according to the above ingredients. In order to further improve the uniformity of the alloy, put 1Kg of powder into the three-dimensional drum mixer at a speed of 18rpm, and take it out after 10 minutes of mixing. It is pressed into a steel mold with an inner diameter of Ф30mm, and the pressurization pressure is designed according to 200MPa. The formed cylindrical rod is prepared by plasma welding under the protection of argon to obtain a consumable electrode. Control the setting of various process parameters in the smelting process, the initial working electrode is 0.6v, and the alloy melting rate is controlled at 1Kg·KW -1 h -1 , the current density is controlled at 7.3A cm -2 . The gap between the electrode and the crucible is 55mm, and the arc length is controlled at about 25mm. In order to improve the uniformi...

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Abstract

The invention relates to a manufacture method for Al-Ti-C middle alloy that includes the following steps: mixing Al, Ti, C powder to equally according to a certain weight ratio, pressing to column consumable electrode, and adopting vacuum electric arc melting to gain Al-Ti-C middle alloy. The invention has high yield, and the quality of the alloy is sharply improved.

Description

technical field [0001] A method for preparing an Al-Ti-C master alloy, relating to a method for preparing an Al-Ti-C master alloy for refining aluminum and aluminum alloy grains, in particular to preparing Al by vacuum consumable arc melting - The method of Ti-C master alloy. Background technique [0002] Grain refinement is one of the important methods to improve the quality and yield of aluminum and aluminum alloy products. Among them, the method of adding grain refiner is easy to operate, low in cost and good in refinement effect, and has been widely used in industrial production. . Since the 1960s, Al-Ti-B has been the preferred grain refiner for the aluminum processing industry. However, with the development of the aluminum processing industry and the continuous improvement of the quality requirements for aluminum alloy products, the inherent shortcomings of Al-Ti-B refiners are gradually exposed, mainly in the following problems: melt pollution, poor fluidity, and ea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/03
Inventor 姚素娟任智森关武红张英张俊红
Owner GUIZHOU BRANCH CHINA ALUMINUM IND