High-temperature molybdenum alloy and preparation method thereof

A molybdenum alloy, high temperature technology, applied in the new high temperature molybdenum alloy and its preparation field, can solve the problems of poor plasticity and low density at room temperature, and achieve the effect of high recrystallization temperature, good performance and industrialization.

Active Publication Date: 2015-12-02
SHANGHAI XIPU HANXIN ELECTRONICS TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0014] The technical problem to be solved in the present invention is to provide a new high-temperature molybdenum alloy and its preparation method fo

Method used

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  • High-temperature molybdenum alloy and preparation method thereof
  • High-temperature molybdenum alloy and preparation method thereof
  • High-temperature molybdenum alloy and preparation method thereof

Examples

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Example Embodiment

[0059] Example 1

[0060] The high-temperature molybdenum alloy provided in this embodiment includes molybdenum, potassium, silicon and inevitable impurities, wherein the content of potassium is 500-552 ppm times the content of molybdenum, and the content of silicon is 8.58 of the content of molybdenum. ~10.8ppm times.

[0061] A method for preparing the aforementioned high-temperature molybdenum alloy includes the following steps:

[0062] Take 100ml of potassium silicate stock solution with a mass fraction of 23%, add 14.5g potassium oxalate and 9.15g potassium hydroxide, mix well, dilute to 4000ml, take 770ml from it and dilute it again to 4000ml, record it as potassium silicate solution, spare, more Secondary dilution can ensure the full dissolution of potassium silicate, potassium oxalate and potassium hydroxide;

[0063] Take 800ml of the silicon-potassium solution, add 2.5kg of molybdenum dioxide powder obtained by reducing ammonium molybdate, stir and disperse uniformly, dry...

Example Embodiment

[0070] Example 2

[0071] The high-temperature molybdenum alloy provided in this embodiment includes molybdenum, potassium, silicon, and inevitable impurities, wherein the potassium content is 552-555 ppm times the molybdenum content, and the silicon content is 8.58 the molybdenum content. ~10.8ppm times.

[0072] A method for preparing the aforementioned high-temperature molybdenum alloy includes the following steps:

[0073] Take 100ml of potassium silicate stock solution with a mass fraction of 27%, add 14.5g potassium oxalate and 9.15g potassium hydroxide, mix well, dilute to 4000ml, take 770ml from it and dilute it again to 4000ml, record it as potassium silicate solution for use;

[0074] Take 4000ml of the silicon-potassium solution, add 12.5kg of molybdenum dioxide powder obtained by reducing ammonium molybdate, stir and disperse evenly, then dry, figure 1 Crushing and sieving in the mixing and crushing machine shown to obtain doped molybdenum dioxide powder;

[0075] Control...

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Abstract

The invention discloses a high-temperature molybdenum alloy and a preparation method thereof. The molybdenum alloy comprises molybdenum, potassium, silicon and unavoidable impurities, wherein the content of potassium is 500-555 ppm times of that of molybdenum, the content of silicon is 8.58-10.8 ppm times of that of molybdenum. The preparation method comprises the following steps: adding molybdenum dioxide powder into a mixed solution of potassium metasilicate, potassium oxalate and potassium hydroxide to prepare molybdenum-doped powder; reducing the molybdenum-doped powder by heating the molybdenum-doped powder in a hydrogen atmosphere to obtain molybdenum-doped powder; performing isostatic pressing operation on the molybdenum-doped powder to obtain a high-temperature molybdenum pressed product; performing sintering, hot-swage and hot drawing on the high-temperature molybdenum pressed product to obtain the high-temperature molybdenum alloy. The high-temperature molybdenum alloy provided by the invention has the benefits that the doping amount of potassium and silicon in the high-temperature molybdenum alloy is much lower than that in a conventional product; raw materials are easy to obtain, and thus the production cost is reduced.

Description

technical field [0001] The invention belongs to the field of metal materials, in particular to a new high-temperature molybdenum alloy and a preparation method thereof. Background technique [0002] In 1985, China's molybdenum resource reserves accounted for 40% of the world's total, ranking first in the world; at the same time, China is also one of the countries with the largest export volume of molybdenum products in the world. Metal molybdenum has a high melting temperature, and can maintain high strength and good conductivity at high temperatures, so it is widely used in the electric light source and electric vacuum industries. For example, the hook supporting the tungsten wire in the light bulb, the grid of the electron tube, the emission tube and the cathode of the secondary rectifier tube, the conductive rod packaged in quartz glass, the reflector of the car lamp, etc. The metal molybdenum products used are molybdenum rods and molybdenum wires. , high temperature mol...

Claims

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Application Information

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IPC IPC(8): C22C27/04C22C1/05
Inventor 叶志强
Owner SHANGHAI XIPU HANXIN ELECTRONICS TECH
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