A kind of high-performance al-ti-v-b alloy refiner and its preparation method and application

Abstract

The invention discloses a high-performance Al-Ti-V-B alloy refiner and its preparation method and application. The chemical element composition of the Al-Ti-V-B alloy is: Ti: 0.5-3.0 wt. %, V: 1.0-4.0 wt.%, B: 1.0-6.0 wt.%, unavoidable impurities less than 0.1%, the balance Al, Al-Ti-V-B alloy is composed of Al matrix and the size is 1-100μm TiAl3, VAl3, VB2, TB2 and AlB2 phase particles. The Al-Ti-V-B refining agent prepared by methods such as melting, heating, blending, stirring and pouring can refine the grain size of α-Al in the cast aluminum-silicon alloy to below 160 μm; therefore the Al of the present invention The ‑Ti‑V‑B alloy has a remarkable refining effect on α‑Al grains in the cast aluminum-silicon alloy, has a simple preparation method and low cost, and is suitable for large-scale industrial production.

Description

A high-performance Al-Ti-V-B alloy refiner and its preparation method and application technical field The invention belongs to aluminum alloy processing technical field, relate in particular to a kind of high-performance Al-Ti-V-B alloy refiner and Its preparation method and application. Background technique Due to its excellent casting properties and better mechanical properties, cast aluminum-silicon alloys are widely used in automobiles, rail transit, construction It is widely used in the fields of construction and aerospace. Grain refinement of cast Al-Si alloys plays an important role in improving the microstructure density and The effect of mechanical properties is significant, and it is of great significance to further expand its application range. At present, the most commonly used industrial casting aluminum alloys It is Al-5Ti-B refiner. However, in Al-Si alloys with Si content greater than 5 wt.%, due to the poisoning effect of Si element, This reduce...

AI Technical Summary

Problems solved by technology

However, the ability of Al-V-B to refine α-Al grains needs to be improved, and the existing process for preparing Al-V-B refiners is relatively cumbersome, requiring multiple changes in furnace temperature, and consumes a lot of energy

The new Al-Nb-B refiner also has good refinement ability but NbAl 3 , NbB 2 Equal refinement particles are easy to settle and fail, making the refinement effect unstable or even invalid

In addition, the Al-Ti-Nb-B refining agent developed and prepared by the patent number CN108220703A can refine the grain size of α-Al to below 450 μm, however, (Ti,Nb)B 2 and (Ti,Nb)Al 3 Agglomeration of particles may reduce refinement efficiency, remains to be resolved

Images