| 简介 |
FIELD : metallurgy.
SUBSTANCE : invention refers to non-ferrous metallurgy and can be used for obtaining alloys based on aluminium. In order to obtain aluminium-titanium alloy combination, alumino-thermal reduction of titanium from its compounds is performed in the environment of molten halogenides of metals. Titanium is reduced from its fluoride or oxide, as well as from fluorotitanate or oxyfluorotitanate of alkali or alkali-earth metal in presence of potassium chloride, sodium fluoride and aluminium fluoride, which are introduced to molten metal or formed during aluminothermic process. The temperature of the process is 850-1150°C. Reduction is performed under the layer of covering flux chloride, which contains potassium and sodium chlorides at the following ratio of components in the mixture, wt % : potassium chloride 42-45, sodium chloride is the rest. Molten metal is exposed during 15-30 minutes and poured into billets. The invention allows obtaining billets of the alloy combination with homogeneous structure with intermetallides with the size of up to 15-30 mcm, reducing non-collectable titanium scrap to 7-9% and improving environmental characteristics of the process.
EFFECT : aluminium alloys obtained using the proposed alloy combination are characterised with high quality at reduction of the alloy combination amount.
12 cl, 17 ex, 5 tbl |
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