Aluminium-titanium-horon rare earth fining agent, and its preparing method

Abstract

The invention relates to the thinning reagent having the aluminum, the boron and the lanthanide of the aluminum and the aluminum alloy, it belongs to the domain of the applied technique of the aluminum alloy. The said thinning reagent factors include the aluminum, the boron, the titanium and the lanthanide (mainly includes the lanthanum and the Ce), the said producing process is showed as follows: the pure aluminum ingot, the alloy ingot having the aluminum and the lanthanide, the potassium hexafluorotitanate and the potassium borofluoride are prepared according to the thinning reagent element confecting in advance; the aluminum ingot and the aluminum lanthanide ingot are heated and melted in the intermediate frequency inducing stove, then several material are added; the fusing body acts with the high temperature; the temperature keeps even and the dregs is removed after the action; then the fusing body is irrigated to the ingot or connecting cast and rolled to the line material. According to the said process condition, the high pure aluminum can be removed the pole crystal, the size of the crystal grain of the industry pure aluminum and all series of distortional aluminum alloy can be divided to under the 100um, the casting form crystal grain core can be reduced to under 2um firmly to all sorts of the aluminum used in the foil material; the size of the crystal grain of the alloy of the aluminum and the silicon can be reduced to under 150-200um. At the same time, the intension, the molding ability and the tenacity of the industry pure aluminum and all sorts of the aluminum alloy can be improved highly.

Description

technical field [0001] The invention relates to an aluminum-titanium-boron rare earth refining agent for aluminum and aluminum alloys and a preparation method thereof, belonging to the technical field of aluminum alloy applications. Background technique [0002] Due to its light weight, excellent cost performance, and good comprehensive performance, aluminum alloys have been widely used in the fields of machinery, automobiles, aviation, and military industries. To obtain aluminum alloys with excellent comprehensive properties, grain refinement is one of the most important means. The yield strength of the material increases with decreasing grain size. In addition, the fine equiaxed grain structure can improve the toughness of the material and ensure its good casting performance, surface finish, and excellent processing performance. Therefore, the fine and uniform equiaxed grain structure is the ideal as-cast structure. To obtain this structure, it can be achieved by increa...

AI Technical Summary

Problems solved by technology

[0005] In view of the poisoning phenomenon and the unsatisfactory refining effect of the existing refining agent, the present invention prepares the Al-Ti-B-RE refining agent through the fluorine salt reaction method, and designs the alloy composition and reaction process parameters to make the refining nucleation phase TiB in agent tissue 2 The particles are evenly and discretely distributed, and the composition of the refiner is required to have a Ti content of about 5%wt and a B content of about 1%wt; the second phase in the refiner: TiAl 3 2 2 reunion

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