Tungsten-rhenium alloy and preparation method thereof

A technology of tungsten-rhenium alloy and tungsten-rhenium, which is applied in the field of preparation of tungsten-rhenium alloy and tungsten-rhenium alloy by solid-liquid infiltration doping method, can solve unfavorable filament design and production, large cold resistance change, and tungsten wire cold resistance change major issues

Active Publication Date: 2012-12-12
ZIGONG CEMENTED CARBIDE CORP
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Problems solved by technology

Combining the results of the two patents, we found that for the trace doping with a rhenium content of 0.4-0.8%, the doping method of patent 1 has a large fluctuation range of the rhenium content, and the cold resistance of the tungsten wire changes greatly, which is not conducive to Filament design and production
Patent 2 u

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  • Tungsten-rhenium alloy and preparation method thereof
  • Tungsten-rhenium alloy and preparation method thereof

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[0014] Example 1

[0015] A preparation method of tungsten-rhenium alloy, comprising the following steps:

[0016] A. Preparation of doped tungsten oxide: using tungsten oxide as raw material, using K 2 SiO 3 , Al(NO3) 3 Doped tungsten oxide is prepared by adding silicon, aluminum and potassium in the form of a solution; calculated in weight percentage, the doping amount is SiO 2 : 0.3%-0.4%, Al 2 O 3 : 0.02%-0.04%, K 2 O: 0.3%-0.5%;

[0017] B. Preparation of doped tungsten powder: reducing and pickling doped tungsten oxide to obtain doped tungsten powder;

[0018] C. Preparation of doped tungsten-rhenium powder: stirring and mixing the doped tungsten powder and ammonium rhenate solution, the temperature of ammonium rhenate solution is kept at 30℃-50℃ during stirring, and the solid-liquid weight ratio of tungsten powder and ammonium rhenate solution ( 100-150): 5; the mixed and stirred doped tungsten-rhenium infiltrate is dried at 90 ℃-110 ℃ for 3-5 hours to obtain do...

Example Embodiment

[0024] Example 2

[0025] A method for preparing a doped tungsten-rhenium wire with a size of φ0.39 mm and below, a potassium content of 67 ppm and a rhenium content of 0.5%, comprising the following steps:

[0026] A. Preparation of doped tungsten oxide: 8.5kg tungsten oxide is used as raw material, and K 2 SiO 3 , Al(NO3) 3 Doped tungsten oxide is prepared by adding silicon, aluminum and potassium in the form of a solution; calculated in weight percentage, the doping amount is SiO 2 : 0.3%, Al 2 O 3 : 0.04%, K 2 O: 0.35%;

[0027] B. Preparation of doped tungsten powder: reducing and pickling the doped tungsten oxide, the obtained doped tungsten powder has a particle size of 3.35um, a potassium content of 94ppm, an oxygen content of 500ppm, and a weight of 6.5kg;

[0028] C. Preparation of doped tungsten rhenium powder: 6.5kg of doped tungsten powder and 210ml of ammonium rhenate solution (the ammonium rhenate solution is prepared by heating and dissolving 46.5g of am...

Example Embodiment

[0036] Example 3

[0037] A method for preparing a doped tungsten-rhenium wire with a size of φ0.39 mm and below, a potassium content of 65 ppm and a rhenium content of 0.45%, comprising the following steps:

[0038] A, prepare doped tungsten powder according to embodiment 2: reduce and pickle doped tungsten oxide, the obtained doped tungsten powder particle size is 3.31um, potassium content is 90ppm, oxygen content is 500ppm, weight 6.5kg;

[0039] B. Preparation of doped tungsten-rhenium powder: 6.5kg of doped tungsten powder and 200ml of ammonium rhenate solution (the ammonium rhenate solution is prepared by heating and dissolving 42.2g of ammonium rhenate containing 69.4% rhenium in pure water with a volume of 175ml). The ammonium rhenate solution is kept at a temperature of 50 °C during stirring, and the solid-liquid weight ratio of the tungsten powder to the ammonium rhenate solution is about 150:5; the mixed and stirred doped tungsten-rhenium infiltrate is dried at 90 °...

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Abstract

The invention discloses a tungsten-rhenium alloy which contains 65-75ppm of potassium and 0.45-0.55% of rhenium. The invention also discloses a manufacturing method of the tungsten-rhenium alloy, which comprises the following steps: A. preparing doping tungsten-rhenium powder: mixing doping tungsten powder solid and ammonium rhenate solution to obtain a doping tungsten-rhenium instillation, and drying the instillation to obtain doping tungsten-rhenium powder, wherein in the mixing process, the temperature is kept at 30-50 DEG C and the solid-liquid weight ratio is (100-300):5; B. reducing to obtain tungsten-rhenium mixed powder; C. compacting; D. presintering; and E. sintering to obtain the tungsten-rhenium alloy. The method has the advantages of simple technique, uniform distribution of doping rhenium in the alloy, and favorable material uniformity; and the prepared tungsten-rhenium alloy has favorable high temperature properties and processability, and thus, is an ideal new material for lamp filaments.

Description

technical field [0001] The invention relates to a tungsten-rhenium alloy, and also relates to a preparation method of the tungsten-rhenium alloy, in particular to a method for producing the tungsten-rhenium alloy by a solid-liquid infiltration doping method. Background technique [0002] Tungsten wire is the raw material for manufacturing electric light source materials, high temperature heating elements and high temperature resistant components. The production method of traditional tungsten wire is generally to add silicon, aluminum, potassium and other elements into tungsten oxide to obtain doped tungsten oxide (wherein K and Si are represented by K 2 SiO 3 Added in the form of solution, Al as Al(NO 3 ) 3 solution), and then the doped tungsten oxide is reduced twice by hydrogen at a temperature of 500-950°C or once reduced and acid-washed with hydrochloric acid or hydrofluoric acid (or not) to obtain doped tungsten powder. The doped tungsten powder is pressed by steel ...

Claims

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Application Information

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IPC IPC(8): C22C27/04C22C1/04
Inventor 缪兵
Owner ZIGONG CEMENTED CARBIDE CORP
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