Antiflaming aluminum-lithium alloy including Sc and Te and machining process thereof

Abstract

The invention discloses an antiflaming aluminum-lithium alloy including Sc and Te and a machining process thereof. The antiflaming aluminum-lithium alloy is smelted between 700 DEG C and 800 DEG C. The chemical ingredients of the alloy include, by weight percent, 2.0 wt.% to 6.0 wt.% of Li, 2.0 wt.% to 3.0 wt.% of Sc, 4.0 wt.% to 8.0 wt.% of Sr, 1.0 wt.% to 2.0 wt.% of Te, 2.0 wt.% to 4.0 wt.% ofSi, 1.0 wt.% to 2.0 wt.% of Sn, 0.5 wt.% to 1.5 wt.% of Er, 0.2 wt.% to 0.8 wt.% of Yb, 0.2 wt.% to 0.4 wt.% of Nd and the balance aluminum. The alloy smelt has extremely excellent antiflaming performance in a static state; and in a dynamic process, after a surface film of the alloy is damaged due to intense stirring, the surface film can still be regenerated fast, and oxidative combustion of thealloy is successfully hindered.

Description

technical field [0001] The invention relates to the technical field of alloys, in particular to an aluminum-lithium alloy. Background technique [0002] Lithium has a very small density (0.53 g / cm 3 ), which is 1 / 14 of steel, 1 / 5 of aluminum, and 1 / 3 of magnesium. When lithium is added to aluminum, it forms the very light aluminum-lithium alloy structural material to date. It has good specific strength and elastic modulus, and its density is only 2.4g / cm 3 . With the increase of lithium content, the density of aluminum-lithium alloy can be further reduced, and it has more excellent cold and hot deformation ability, better corrosion resistance and suitable ductility. In general, the density of the aluminum alloy can be reduced by 3% and the modulus can be increased by 6% for every 1 wt.% lithium added. [0003] Aluminum-lithium alloy has excellent mechanical properties, high damping performance for shock absorption and noise reduction, as well as anti-radiation and anti-...

AI Technical Summary

Problems solved by technology

However, as a structural material, it is far from enough to meet the requirements of only having combustion resistance during smelting. More importantly, the final aluminum-lithium alloy product must also have satisfactory mechanical strength, at least reaching the level commonly used. Mechanical properties of Al-Li alloys

It was reported earlier that the addition of Be and Ca to Al-Li alloys can significantly improve the oxidation resistance of Al-Li alloys, but Be is highly toxic, and excessive Ca will seriously damage the mechanical properties of Al-Li alloys, which greatly limits the performance of Be. Industrial Application of Li and Ca in Flame Retardant Al-Li Alloy