Amino-complex-treated high-strength aluminum alloy material and preparation method thereof

Abstract

The invention discloses an amino-complex-treated high-strength aluminum alloy material and a preparation method thereof. The amino-complex-treated high-strength aluminum alloy material comprises the following components in percentage by mass: 3.9-5.0% of Cu, 0.4-1.2% of Mn, 0.2-0.8% of Mg, at most 0.1% of Cr, at most 0.1% of Ni, at most 0.25% of Zn, at most 0.15% of Ti, at most 0.2% of Ti+Zr, at most 1.2% of Si, at most 1.2% of Fe, and the balance of Al and inevitable trace impurities, wherein the amino complex modifier Yn[M(NH3)m] accounts for 0.05-1% of the total mass of the furnace material. Compared with common aluminum alloy materials, the aluminum alloy material disclosed by the invention has higher purity and better properties.

Description

technical field [0001] The invention belongs to the field of aluminum alloy materials, and relates to a high-strength aluminum alloy material treated with an amino complex 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, Al-Cr, Al-Mn, Al-Co, Al-N...

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Problems solved by technology

[0015] The technical problem to be solved by the present invention is to use the amino complex modifier Y n [M(NH 3 ) m ] powder is used as a high-efficiency modifier, which is added to the alloy melt in a fluidized manner along with the protective gas, and releases the metamorphic element M in atomic or ion state through chemical reaction or pyrolysis with the aluminum alloy melt, and simultaneously produces N, can absorb and remove harmful impurity elements such as H and O in the melt, achieve the purpose of high efficiency, uniform transformation and purification of the melt, and realize the grain refinement of the matrix and metal compound phase; and replace the middle in the production of aluminum alloy Alloy, reduce intermediate links, save energy and reduce consumption

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