An aluminum alloy composite refiner, strengthening agent and its preparation method and device

Abstract

The invention belongs to the field of metal materials, and particularly refers to a composite thinning and strengthening agent for aluminum and aluminum alloys, a preparation method and a device. First, put pure aluminum in the crucible of the melting furnace and melt it to a certain temperature, make the top of the aluminum melt exceed the upper entrance of the electromagnetic circulation device in the crucible, and add an aluminum alloy covering agent to the top of the crucible, and put the weighed and pretreated Ti , B 2 o 3 , Zr, C powder or shavings are added from the feeding port of the electromagnetic circulation device, and then the electromagnetic circulation device is started, and after a period of cycle reaction compounding, the required compound refinement and strengthening agent are obtained. The composite thinning and strengthening agent prepared by the present invention not only has the characteristics of traditional Al-Ti-B series high-efficiency thinning and Al-Ti-C series long-term thinning, but also contains a large amount of submicron and nanometer TiB 2 , ZrB 2 , TiC, ZrC reinforcement particles, while improving the refinement effect, are finally dispersed in the alloy matrix to achieve the effect of dispersion strengthening.

Description

technical field [0001] The invention belongs to the field of metal materials, and particularly refers to an aluminum-titanium-zirconium-carbon-boron composite refinement and strengthening agent master alloy, a preparation method and a device for aluminum and aluminum alloys. Background technique [0002] With the increasing application of aluminum alloys in high-tech fields, aluminum alloys with fine and uniform equiaxed grains have broad market application prospects. In industrial production, adding a grain refiner to the melt is the most economical and practical method to refine the grain and improve the comprehensive mechanical properties of the alloy. As the most widely used refining agent, aluminum-titanium-boron intermediate alloy has the characteristics of long-term refining, which can effectively prevent the formation of coarse equiaxed crystals, columnar crystals and feathered crystals. At present, about 75% of the world's aluminum and aluminum alloys The aluminum-...

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Problems solved by technology

[0003] The present invention is aimed at producing a large amount of fluoride fumes in the preparation process of the existing aluminum-titanium-boron refiner, which causes great pollution to the environment, and the wettability of carbon in molten aluminum is poor during the preparation process of the aluminum-titanium-carbon refiner , the problem of difficult preparation; a green and long-acting aluminum alloy compound refiner and strengthener and its preparation device are proposed. The prepared aluminum-titanium-zirconium-carbon-boron compound refiner and strengthener master alloy can be used in effective While refining aluminum and aluminum alloys, a large number of micro-nano particles in the master alloy are dispersed in the alloy, which plays an effective role in dispersion strengthening

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