Metallic hydrogen compound modified high-performance aluminum alloy material and preparation method thereof

Abstract

The invention discloses a metallic hydrogen compound modified high-performance aluminum alloy material and a preparation method of the material; the metallic hydrogen compound modified high-performance aluminum alloy material comprises the components by weight percent: less than or equal to 2.0% of Cu, less than or equal to 0.7% of Mn, 1.0-3.0% of Mg, less than or equal to 0.3% of Cr, 3.0-7.0% of Zn, less than or equal to 0.1% of Ti, wherein the content of hydrogen compound MHn modificator accounts for 1ppm-1.0% of the total quantity of furnace charge, and the balance of Al and unavoidable trace impurities, wherein the content of a single impurity element is less than or equal to 0.03%, and the content of the total impurity elements is less than or equal to 0.15%. The metallic hydrogen compound modified high-performance aluminum alloy has a smaller grain structure and higher purity.

Description

technical field [0001] The invention relates to an aluminum alloy material and a preparation method thereof, in particular to a high-performance aluminum alloy material modified by a metal hydride and a preparation method thereof. Background technique [0002] Modification can greatly improve the comprehensive mechanical properties and chemical stability indicators of aluminum alloys, sometimes even subversively. Substances capable of altering are called modificators. [0003] At present, almost all modificators are concentrated on one technical means: to produce master alloys containing modifiable elements with aluminum as the matrix, and then add the master alloys to the melt when the aluminum alloy is smelted. [0004] This process produces two unfavorable links for energy saving: ①The melting and casting of master alloys containing high concentrations of metamorphic elements often require very high temperatures (>1000°C, such as Al-Ti-B, Al-RE, Al- Si, Al-Sc, Al-V, ...

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Problems solved by technology

For the production of high-performance alloys with extremely strict requirements on impurity limits, the impurities brought in by the modifier are often enough to make the chemical composition exceed the limit; at the same time, a large number of effective modifiers accumulated in the microscopic state are still in the state of single-crystal clumps. At low temperature (<800°C), it cannot be completely dissolved and melted. Only the extremely thin film layer on the surface plays a part of the metamorphic effect due to the possible alloying reaction with aluminum. , the metamorphic effect is greatly reduced

[0015] In actual production, the frequent problems are that the modifying ability of the modifying agent is unstable, the ratio of the modifying agent added fluctuates widely, it is not easy to accurately control the amount added, and at the same time, it is very easy to mix harmful elements in the process of manufacturing aluminum master alloys of high-temperature elements , has a great influence on the final product quality

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