Preparation method of zinc-aluminum-titanium-boron intermediate alloy

Abstract

The invention provides a preparation method of a zinc-aluminum-titanium-boron intermediate alloy. The method comprises the steps of weighing raw materials which comprise, by weight, 40-80% of pure zinc ingots, 20-50% 0f pure aluminium ingots, 0.1-20% of pure aluminium powder, 0.1-8% of pure titanium powder and 0.05-3% of pure boron powder; performing ball milling of the pure titanium powder, the pure aluminium powder and the pure boron powder in argon by using a ball milling machine until the powder is mixed uniformly and briquetted, melting the pure aluminium ingots by using a medium-frequency induction furnace, and pressing the powder compacting blocks into aluminium liquid for melting; stirring the melt fully, cooling the melt naturally, adding the pure zinc ingots until all the pure zinc ingots are melted, stirring uniformly, and pouring in casting moulds to obtain the alloy. No solid, liquid or gas waste is generated, no environmental pollution is caused, and the problems that processes are increased, the production period is prolonged and the production cost is high due to the fact that slags are required to be processed during preparation of the intermediate alloy by using a villiaumite method are solved simultaneously.

Description

technical field [0001] The invention relates to a preparation method of a zinc-aluminum-titanium-boron intermediate alloy, belonging to the technical field of metal alloy materials. Background technique [0002] Zinc-aluminum alloy has excellent mechanics, casting technology and mechanical processing performance, and has broad market application prospects. The hypoeutectic zinc-aluminum alloy matrix with aluminum content less than 5wt.% is composed of primary η-Zn grains and Zn-Al eutectic structure, and η-Zn grains are directly formed in the melt, which is easy to form branches Well-developed, large-sized dendrites. However, hypereutectic zinc-aluminum alloys with aluminum content greater than 5wt.% tend to form well-developed primary α-Al dendrites during solidification. Controlling the developed η-Zn or α-Al dendrites in zinc-aluminum alloys to reduce the grain size, reduce the number of dendrite branches, and even transform them into small equiaxed crystals will great...

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Problems solved by technology

This preparation process will release toxic fluorine-containing gas and smoke during the reaction process, which will cause harm to the health of workers and pollute the atmospheric environment around the factory; at the same time, KF, K generated during the reaction process must be treated 2AlF6 and other fluorine salt slags are processed for slag removal, storage, transportation, etc., which increases the process and man-hours, and significantly increases the production cost; in addition, part of the aluminum in the raw materials will be Enter K2AlF6 and other slag and lose, which further increases the production cost; and the above-mentioned fluorine salt waste is likely to enter the middle due to incomplete slag removal In the alloy matrix, and with the addition of the intermediate alloy to the zinc-aluminum alloy to be refined, it will cause product quality problems

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