High-strength aluminum alloy metamorphosing through carbonyl W (CO) 6 and preparation method thereof

Abstract

The invention discloses a high-strength aluminum alloy metamorphosing through carbonyl W (CO) 6 and a preparation method of the high-strength aluminum alloy metamorphosing through the carbonyl W (CO) 6. The high-strength aluminum alloy metamorphosing through the carbonyl W (CO) 6 comprises, by weight, 1.5%-2.0% of copper, 0.5%-0.7% of manganese, 0.8%-1.0% of magnesium, 0.3%-0.5% of nickel, <=1.0% of silicon, <=1.0% of ferrum, carbonyl W (CO) 6 accounting for 0.01%-0.03 of the total amount, and the balance aluminum and unavoidable trace impurities. In addition, a single trace impurity accounts for <=0.05% of the total amount and the total trace impurities account for <=0.15%. The aluminum material has better a performance and a higher impurity degree and the preparation method is simple.

Description

technical field [0001] The invention relates to an aluminum alloy material and a preparation method thereof, in particular to a carbonyl compound W(CO) 6 A metamorphic high-performance aluminum alloy material 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, ...

AI Technical Summary

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

[0008] 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