Zinc-aluminum-titanium-carbon intermediate alloy refiner, preparation method thereof and use thereof

Abstract

The invention belongs to the field of metal materials, and particularly relates to a zinc-aluminum-titanium-carbon intermediate alloy refiner used for refining zinc-aluminum alloy grain tissues and a preparation method thereof. The invention adopts a technical proposal that the zinc-aluminum-titanium-carbon intermediate alloy refiner comprises the following four components by mass: 35 to 73 percent of zinc, 20 to 53 percent of aluminum, 1 to 16 percent of titanium and 0.1 to 3 percent of carbon. The invention also provides the preparation method for the zinc-aluminum-titanium-carbon intermediate alloy refiner and use, and has the advantages that: because the intermediate alloy refiner is the same as a matrix of zinc-aluminum alloy to be refined, the matrix components of the zinc-aluminum alloy to be refined are not changed, and the intermediate alloy refiner can be added at the normal melting temperature of the zinc-aluminum alloy to be refined and melted in short time; the low adding amount of the intermediate alloy refiner achieves the aim of efficient refining; therefore, the use is quite convenient, and the production cost of the zinc-aluminum alloy can be greatly reduced.

Description

technical field [0001] The invention belongs to the field of metal materials, and in particular relates to a zinc-aluminum-titanium-carbon master alloy refining agent for refining the grain structure of zinc-aluminum-aluminum alloy and a preparation method thereof. Background technique [0002] Zinc-aluminum alloy has excellent casting properties, mechanical properties and processing properties, and has broad market application prospects. However, due to the wide crystallization temperature range of zinc-aluminum alloys, coarse primary α-Al dendrites are easy to form, resulting in shrinkage cavities, shrinkage porosity, and intragranular component segregation defects, resulting in a decline in mechanical properties and potential aging risks of products . In order to overcome the above problems, it is necessary to add a grain refiner to the zinc-aluminum alloy in actual production to refine the grains. [0003] At present, grain refiners used in zinc-aluminum alloys contain...

AI Technical Summary

Problems solved by technology

There are many problems in refinement by means of salt, rare earth or aluminum-based master alloy refiner: the decomposition of salt in the zinc-aluminum melt brings other element pollution or inclusions (such as KF), which deteriorates the mechanical properties of the alloy ; Salts will corrode equipment during the smelting process, releasing toxic gases and smoke, which will cause deterioration of working conditions and environmental pollution; affected by production conditions and operating processes, when refined with salts and rare earths, zinc-aluminum alloys can The amount of effective refining elements absorbed is difficult to control, resulting in unpredictability of the refining effect; while the melting temperature of the aluminum-based master alloy refining agent is much higher than the melting temperature of zinc-aluminum alloys, it is necessary to greatly increase the refining temperature of zinc-aluminum alloys during refining. The smelting temperature of the alloy may greatly extend the holding time to ensure that the refiner melts and fully enters the zinc-aluminum liquid, which will lead to oxidation, burning loss, product inclusions of zinc-aluminum alloys, and increase the production cycle and increase production costs

Such a high amount of addition is not only costly, but also changes the chemical composition of the zinc-aluminum alloy matrix, and may generate unnecessary heterogeneous structures during the solidification process of the zinc-aluminum alloy, which will adversely affect other properties such as mechanics

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