Production method of high-density long-life tungsten-molybdenum alloy crucible

A technology of tungsten-molybdenum alloy and production method, applied in metal processing equipment, metal material coating technology, gaseous chemical plating and other directions, can solve the problems of difficulty in producing high density and long life, and achieve dense organization, uniform grains, Strength-enhancing effect

Active Publication Date: 2016-07-06
ACHEMETAL TUNGSTEN & MOLYBDENUM
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Problems solved by technology

[0004] The purpose of the present invention is to provide a production method of a high-density and long-life tungsten-molybdenum alloy c

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  • Production method of high-density long-life tungsten-molybdenum alloy crucible

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[0030] Example 1

[0031] A method for producing high-density and long-life tungsten-molybdenum alloy crucibles includes the following steps: step one, pretreating tungsten powder and molybdenum powder and then sieving separately. The pretreatment process is: putting tungsten powder and molybdenum powder under vacuum conditions. Annealing treatment is carried out for 2h, and the annealing temperature is 1300℃; after sieving, the particle size of tungsten powder is 20 microns, and the particle size of molybdenum powder is 10 microns. After the sieved tungsten powder and molybdenum powder are mixed according to the mass ratio of 1:9 Carry out ball milling for 5 hours to obtain tungsten-molybdenum mixed powder, which is ready for use;

[0032] Step 2. Weigh the mass or volume of the tungsten-molybdenum mixed powder required to form a crucible according to the target size of the crucible, and manufacture a cold isostatic pressing mold with the same volume as the molding cavity and the ...

Example Embodiment

[0036] Example 2

[0037] A method for forming tungsten and molybdenum powder metallurgical products includes the following steps: step one, pretreating the tungsten powder and molybdenum powder and then sieving separately. The pretreatment process is: annealing the tungsten powder and molybdenum powder under vacuum conditions 2h, annealing temperature is 1300℃; after sieving, the particle size of tungsten powder is 0.6 microns, and the particle size of molybdenum powder is 0.05 microns. The sieved tungsten powder and molybdenum powder are mixed in a mass ratio of 9:1 and then ball milled for 1h. Then mix at room temperature for 20 hours to prepare tungsten and molybdenum mixed powder, which is ready for use;

[0038] Step 2. Weigh the mass or volume of the tungsten-molybdenum mixed powder required to form a crucible according to the target size of the crucible, and manufacture a cold isostatic pressing mold with the same volume as the molding cavity and the tungsten-molybdenum mix...

Example Embodiment

[0042] Example 3

[0043] A method for forming tungsten and molybdenum powder metallurgical products includes the following steps: step one, pretreating tungsten powder and molybdenum powder and then sieving separately, the particle size of the tungsten powder after sieving is 0.25 microns, and the particle size of molybdenum powder is 0.1 microns , The sieved tungsten powder and molybdenum powder are mixed according to the mass ratio of 4:6, then ball milled for 3h, and then mixed at room temperature for 20h to obtain tungsten-molybdenum mixed powder, which is ready for use; wherein, the pretreatment process is: The powder and molybdenum powder are annealed for 2h under vacuum conditions, the annealing temperature is 1300℃;

[0044] Step 2. Weigh the mass or volume of the tungsten-molybdenum mixed powder required to form a crucible according to the target size of the crucible, and manufacture a cold isostatic pressing mold with the same volume as the molding cavity and the tungste...

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Abstract

The invention relates to a production method of a high-density long-life tungsten-molybdenum alloy crucible. The production method comprises the steps of preparing tungsten-molybdenum mixed powder, preparing powder blanks, lathing and machining the powder blanks, sintering, performing surface treatment, and then performing hot isostatic pressing. According to the production method, cold isostatic pressing, sintering treatment and the hot isostatic pressing are combined to treat the tungsten-molybdenum powder, so that the dislocation density in a product is high, and dislocations mutually intersect so as to form jogs, so that the intensity of the product is increased. Additionally, fibrous tissues of the blanks formed by the cold isostatic pressing are disconnected again and recrystallized by hot isostatic pressing molding, so that the conditions of tissue delamination, uneven grain distribution and uneven grain size are avoided, the obtained tissues are uniform, small and dense, and the service life is prolonged.

Description

technical field [0001] The invention relates to the technical field of metal materials, in particular to a production method of a high-density and long-life tungsten-molybdenum alloy crucible. Background technique [0002] Materials are one of the four major industries in China, including organic polymer materials, composite materials, metal materials and inorganic non-metal materials. As a kind of metal material manufacturing, powder metallurgy technology develops together with other manufacturing methods with its irreplaceable unique advantages. Porous materials and other methods cannot produce or have advantages such as materials that are difficult to produce. Powder metallurgy is the technology of producing metal powder and forming and sintering metal powder or metal powder and non-metal powder mixture to produce powder metallurgy materials or powder metallurgy products. [0003] Powder forming is the basic process of powder material preparation process, and mold is th...

Claims

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Application Information

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IPC IPC(8): B22F1/00B22F3/04B22F3/15B22F3/03B22F5/10C23C16/08
CPCC23C16/08B22F3/03B22F3/04B22F3/15B22F5/10B22F2998/10B22F1/142
Inventor 耿宏安崔耀国
Owner ACHEMETAL TUNGSTEN & MOLYBDENUM
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