| 简介 |
FIELD : metallurgy.
SUBSTANCE : invention relates to metallurgy of non-ferrous metals, in particular to the production of ligatures and alloys of aluminum with rare earth metals, and can be used to produce an aluminium-erbium ligature. Method comprises preparing an initial mixture in powdered state with the following component ratio, wt% : erbium fluoride 20–45; sodium fluoride 10–22; potassium chloride 37–68, mixing the mixture with aluminium in the form of granules, providing a weight ratio of the mixture to aluminium from 0.2 to 0.75, placing the resulting reaction mixture in a graphite crucible, heating and melting, and holding the melt at a temperature of 750–850 °C for 30–60 minutes with intermittent stirring to effect aluminothermic reduction, and separately casting the molten salt and liquid ligature into moulds.
EFFECT : invention provides a ligature with a different component content and a uniform distribution of aluminium intermetallides throughout the volume, simplifies the technological process, the selected composition of the mixture – low melting point of the mixture, complete melting of the mixture at aluminothermic reduction temperature and good wetting of aluminium.
1 cl, 1 tbl, 7 ex |
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