Sc alloy is a kind of high-performance alloy. There are several ways to improve the performance of Sc alloy, among which microalloying strengthening and toughening is the frontier field of high-performance aluminum alloy research in recent 20 years. The so-called microalloying strengthening and toughening usually refers to a technology in which trace elements with mass percentage less than 0.5% are added or compounded into scandium alloy to greatly improve the strength and toughness of the alloy. Scandium, as a transition group element and rare earth element, is added to the alloy, which can not only significantly refine the as cast alloy grains, increase the recrystallization temperature and thus improve the strength and toughness of the scandium alloy, but also significantly improve the weldability, heat resistance, corrosion resistance, thermal stability and neutron irradiation damage resistance of the scandium alloy. Therefore, scandium alloy is considered as a new generation of high-performance alloy structural materials for aerospace, ships and weapons.
A production method of high-purity scandium alloy is popular in China. The invention relates to a method for electrolytic production of high-purity aluminum scandium alloy by adding scandium chloride or scandium fluoride into the electrolyte using the existing three-layer liquid aluminum refining electrolytic cell. The utility model is characterized in that scandium chloride or scandium fluoride is added to the electrolyte of three-layer liquid electrolysis to directly electrolytic produce high-purity scandium alloy, and the electrolyte is fluoride chloride or pure fluoride. Its operation control parameters are: electrolysis temperature: 650 ℃~850 ℃, working voltage of electrolytic cell: 4.0V~7.0V, and electrolyte thickness: 4.0cm~15.0cm; By directly adding scandium chloride or scandium fluoride into the three-layer liquid aluminum refining electrolytic cell to make scandium and aluminum electrolytic precipitate together, high-purity scandium alloy can be directly produced, which can greatly improve the quality of scandium alloy, improve the metal recovery rate and reduce the production cost.
