The preparation method of high tungsten content tungsten-zirconium alloy includes the following steps: (1) powder mixing and powder mixing: tungsten powder and zirconium titanium powder mixing, granulation after powder mixing, tungsten powder adding weight ratio of 50% ~ 70%; (2) pressing, sintering: the use of cold static molding press pressing, grading pressure relief; High vacuum resistance furnace degreasing sintering, fine car peeling, produced consumable electrode; (3) Consumable arc melting: after at least one consumable melting, tungsten-zirconium alloy with uniform composition and high tungsten content can be obtained. The invention adopts powder metallurgy process to prepare consumable electrode, the electrode strength is high, the phenomenon of "slag dropping" will not occur in melting, and the powder sintering can improve the distribution state of tungsten and other elements in the electrode, which is conducive to the composition uniformity of the ingot, and then the melted tungsten-zirconium alloy with tungsten content up to 70% can be obtained. In addition, the alloy can be purified and the inclusion can be eliminated by the self-consumption melting process, so that the density and strength and toughness of the material are further improved than those of the powder metallurgy alloy.
There are two main methods to prepare tungsten-zirconium alloy: (1) Powder metallurgy process: powder metallurgy can prepare alloy materials with high tungsten content. This process belongs to solid phase sintering process, with less diffusion among elements and low alloying degree, so it is difficult to achieve absolute density. For some special fields, the properties of the alloy are very demanding, and the tungsten-zirconium alloy prepared by powder metallurgy cannot meet the design requirements in terms of density and strength and toughness. (2) vacuum melting methods: vacuum smelting can prepare the material performance of high alloy, melting state is alloy material, but because of the electricity arc smelting temperature limits, tungsten zirconium alloy smelting of high tungsten content increased the difficulty, and high density tungsten element, arc melting tungsten group of yuan settlement phenomenon which were liable to occur, it is difficult to organize uniform high tungsten alloy is prepared.
The advantages are: The present invention by powder metallurgy process and the consumption of smelting process Combined with the preparation of high content of tungsten tungsten zirconium alloys, on the one hand, the preparation of consumable electrode using powder metallurgy technology, electrodes strength is higher, do not show up in the melt refining slag "off" phenomenon, and powder sintering can well improve the electrode in the distribution state of tungsten and other elements, is beneficial to the composition of ingot casting organization uniformity, Furthermore, the fused tungsten-zirconium alloy with tungsten content up to 70% can be obtained. On the other hand, through the consumptive melting process, the alloy can be purified, the inclusion can be eliminated, so that the density and strength and toughness of the material are further improved than the powder metallurgy alloy.
