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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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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 crucible. The technical problem to be solved is to overcome the difficulty in producing high-density, long-term Lifetime Crucible Problems

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

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Embodiment 1

[0031]A production method of a high-density and long-life tungsten-molybdenum alloy crucible comprises the following steps: step 1, pretreating tungsten powder and molybdenum powder and then screening respectively, the pretreatment process is: tungsten powder and molybdenum powder are placed under vacuum conditions The annealing treatment was carried out at 1300°C for 2 hours; the particle size of the tungsten powder after sieving was 20 microns, and the particle size of the molybdenum powder was 10 microns. Carry out ball milling 5h, make tungsten-molybdenum mixed powder, set aside;

[0032] Step 2. According to the target size of the required crucible, weigh the mass or volume of the tungsten-molybdenum mixed powder required to form a crucible, and make a cold isostatic pressing mold with the same volume as the molding cavity and the tungsten-molybdenum mixed powder, and cold The structure of the isostatic pressing die is as described above, specifically as figure 1 As show...

Embodiment 2

[0037] A molding method of tungsten and molybdenum powder metallurgy products, comprising the following steps: step 1, pretreating tungsten powder and molybdenum powder and then screening respectively, the pretreatment process is: annealing the tungsten powder and molybdenum powder under vacuum conditions 2h, the annealing temperature is 1300°C; the particle size of the sieved tungsten powder is 0.6 microns, and the particle size of the molybdenum powder is 0.05 microns, and the sieved tungsten powder and molybdenum powder are mixed according to the mass ratio of 9:1 and ball milled for 1 hour. Then mix at room temperature for 20 hours to obtain tungsten-molybdenum mixed powder, which is set aside;

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

Embodiment 3

[0043] A method for forming a tungsten-molybdenum powder metallurgy product, comprising the following steps: step 1, sieving the tungsten powder and the molybdenum powder after pretreatment, the particle size of the tungsten powder after screening is 0.25 microns, and the particle size of the molybdenum powder is 0.1 microns , mix the sieved tungsten powder and molybdenum powder according to the mass ratio of 4:6, then ball mill for 3 hours, and then mix at room temperature for 20 hours to obtain tungsten-molybdenum mixed powder for later use; wherein, the pretreatment process is: the tungsten The powder and molybdenum powder were annealed for 2 hours under vacuum conditions, and the annealing temperature was 1300°C;

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

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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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