Method for preparing NbZr10 alloy cast ingots

Abstract

The invention relates to a method for preparing NbZr10 alloy cast ingots, which comprises the following steps of: (a), preparing niobium ingots; (b), preparing zirconium strips; (c), preparing electrodes; (d), performing primary smelting in a vacuum consumable electric-arc furnace; (e), performing secondary smelting in the vacuum consumable electric-arc furnace; (f), scalping zirconium niobium alloy cast ingots obtained by the two times of smelting till the surface is smooth and bright without any defects that can be seen by bare eyes; making samples and analyzing if these ingots are qualified; and obtaining NbZr 10alloy cast ingots, namely qualified ingots. The two times of smelting in the high-vacuum, high-current-intensity and high-power vacuum consumable electric-arc furnace ensure that the components of the finished NbZr10alloy cast ingots are distributed uniformly, and dramatically reduce impurity content. The diameter of the finished cast ingots is big enough to meet the current quality and use requirements on NbZr10alloy cast ingots.

Description

technical field [0001] The invention relates to the field of preparation methods of NbZr10 alloy ingots. Background technique [0002] NbZr10 alloy is a newly developed alloy of niobium alloys. Due to its unique properties, it has been applied to vacuum sputtering architectural glass, solar energy, photovoltaic coatings, and has great market prospects and economic benefits. Since the specific gravity of the niobium used to prepare the NbZr10 alloy ingot is 8570kg / m2 and the melting point is 2477℃, it has a large specific gravity and a high melting point. Generally, an electron bombardment furnace is used to smelt a commonly used niobium alloy ingot. When the NbZr10 alloy ingot is prepared by furnace smelting, due to the large difference between the atomic radii of niobium and zirconium, the prepared NbZr10 alloy will have serious composition segregation and poor uniformity. Quality and size requirements of NbZr10 alloy ingots. Since the specific gravity of zirconium used t...

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Problems solved by technology

Since the specific gravity of niobium used to prepare NbZr10 alloy ingots is 8570kg / ㎡ and the melting point is 2477°C, it has a large specific gravity and high melting point. Generally, electron bombardment furnaces are used to smelt commonly used niobium alloy ingots, but conventional electron bombardment When preparing NbZr10 alloy ingots by furnace smelting, due to the large difference in atomic radius between niobium and zirconium, the prepared NbZr10 alloys will have serious composition segregation and poor uniformity, and the diameter of NbZr10 alloy ingots is small (diameter<200mm), which cannot meet Quality and Size Requirements of NbZr10 Alloy Ingot

Since the specific gravity of zirconium used to prepare NbZr10 alloy ingots is 6500kg / ㎡ and the melting point is 1886°C, vacuum electric furnace consumable furnaces are generally used to melt commonly used zirconium alloy ingots, and vacuum consumable electric arc furnaces are used to melt NbZr10 alloy ingots. There are high melting point, high power, high melting current, high requirements for vacuum degree, easy cracks and other technical problems and quality defects in the crystallization process, high technical requirements and high cost for preparing NbZr10 alloy ingots, and the quality of finished products cannot meet Requirements

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