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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 for the existing high-temperature molybdenum alloys with low density and poor plasticity at normal temperature. High, better room temperature plasticity

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

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Embodiment 1

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

[0061] A kind of preparation method as aforementioned high-temperature molybdenum alloy comprises the steps:

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

[0063] Get the described silicon-potassium solution of 800ml, add the molybdenum dioxide powder that 2.5kg obtains by reducing ammonium molybdate, after stirring and dispersing, dry, ...

Embodiment 2

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

[0072] A kind of preparation method as aforementioned high-temperature molybdenum alloy comprises the 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 to 4000ml again, record it as silicon potassium solution, and set aside;

[0074] Get the described silicon-potassium solution of 4000ml, add the molybdenum dioxide powder that 12.5kg obtains by reducing ammonium molybdate, after stirring and dispersing, dry, in such as figure 1 Crushed and sieved in the shown stirring pulverizer to obtain doped molybdenum dioxide powder;

[0075] ...

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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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