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BaZrO3 refractory material for smelting titanium alloy and preparation method of crucibles

A technology for refractory materials and titanium alloys is applied in the field of preparation of refractory materials and crucibles, and can solve the problems of being unsuitable for large-scale use, high price, and increasing the cost of titanium alloys.

Inactive Publication Date: 2012-06-20
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its price is too high, which directly increases the cost of titanium alloy and is not suitable for large-scale use.

Method used

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  • BaZrO3 refractory material for smelting titanium alloy and preparation method of crucibles
  • BaZrO3 refractory material for smelting titanium alloy and preparation method of crucibles
  • BaZrO3 refractory material for smelting titanium alloy and preparation method of crucibles

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Embodiment

[0023] (1) BaZrO 3 Preparation of refractories

[0024] Using high-purity barium carbonate and zirconia as raw materials, the molar ratio of the two is BaCO 3 : ZrO 2 =1:1; in addition, add 0.5~5.0 mol% TiO 2 Flux sintering accelerator; the batch is repeatedly sintered at 1300°C to make BaZrO 3 refractory material.

[0025] (2) BaZrO 3 Preparation of the melting crucible

[0026] The manufacturing process and steps of melting crucible are as follows:

[0027] 1) Ingredients: High-purity barium carbonate and zirconia are used as raw materials, the molar ratio of the two is 1:1, and 2.0 mol% of TiO is added 2 ;

[0028] 2) Ball milling: add an appropriate amount of absolute ethanol to the prepared material, add zirconia balls, and ball mill for 20 hours;

[0029] 3) Drying: The ball-milled material is placed in a drying box and dried at 100~110°C;

[0030] 4) Molding: add a binder to the dried material, the binder is paraffin, the addition amount is 4wt%, and press it ...

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Abstract

The invention discloses a BaZrO3 refractory material of a titanium and titanium alloy smelting crucible and a crucible preparation method. The preparation method comprises the steps of: using BaCO3 and ZrO2 as raw materials, repeatedly sintering the raw materials at 1200-1400 DEG C to synthesize barium zirconate (BaZrO3) crystal powder; adding a proper dosage of additive and adhesive in the barium zirconate material, performing such procedures as pre-treating, forming, pre-sintering and sintering, and the like to prepare a crucible. The BaZrO3 crucible is used as a container for smelting titanium alloy at a temperature of 1650-1750 DEG C in a vacuum environment; the internal and external surfaces of the crucible are intact after the smelting process and no reaction is generated with the titanium alloy, no obvious interface layer exists, and as shown in the detection, no crucible material exists on the external surface of the metal, and the oxygen content in the alloy is low, so that the purity and performance of the titanium alloy are guaranteed.

Description

technical field [0001] The invention relates to a refractory material used for melting crucibles for titanium and titanium alloys and a preparation method for the crucibles, belonging to the technical field of high-temperature melting refractory materials. technical background [0002] Titanium alloy has a series of excellent properties such as high specific strength, low density, and corrosion resistance, and is widely used in modern industries, such as biological science, medical engineering, aerospace industry, energy, marine, military industry and other fields. Titanium alloys cannot be widely used, mainly due to its high price. Among its cost components, smelting costs account for 30% to 40%. [0003] At present, the consumable electrode electric arc furnace is commonly used in the industry with a water-cooled copper crucible as a device for smelting titanium alloys. However, the water-cooled copper crucible takes away a lot of heat, seriously wastes energy, and cause...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 姜敏张钊刘卫东周菲菲万怡猛鲁雄刚李重河
Owner SHANGHAI UNIV
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