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A kind of preparation method of molybdenum metal grid

A molybdenum metal and grid technology is applied in the field of preparation of molybdenum metal grid, which can solve the problems of low plasticity and poor forming performance, and achieve the effects of dense and uniform particles, increased density and good fluidity.

Active Publication Date: 2021-11-05
JINDUICHENG MOLYBDENUM CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method prepares molybdenum powder into spherical molybdenum powder, and then uses a powder bed electron beam 3D printer to prepare a molybdenum metal grid. The spherical molybdenum powder has good fluidity, dense and uniform particles, and is tightly combined after rapid melting, and the heat of the electron beam is high. The characteristics of molybdenum metal overcome the shortcomings of high strength, low plasticity, easy oxidation, poor formability, and difficulty in processing into complex structural and functional parts, and obtain (10mm~100mm)×(10mm~100mm)×(10mm~100mm ) (length × width × height), the size of each square through hole is (1mm~10mm)×(1mm~10mm), the wall thickness of the partition is 0.1mm~1mm molybdenum metal grid, and the molybdenum metal grid is improved Excellent performance, saving the cost of preparation

Method used

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  • A kind of preparation method of molybdenum metal grid

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Embodiment 1

[0035] The preparation method of the present embodiment comprises the following steps:

[0036] Step 1, preparation of molybdenum rods:

[0037] Step 101, put the molybdenum powder into the prefabricated rubber sleeve mold, seal it with a rubber stopper after vibration treatment, and then place it in the pressure chamber of the cold isostatic press for 12 minutes of cold isostatic pressing under the condition of a pressure of 180 MPa, Molybdenum rod biscuit is obtained after demolding; the particle size of the molybdenum powder is 3.6 μm, the mass purity of the molybdenum powder is 99.97%, the mass content of oxygen is 1100ppm, and the tap density of the molybdenum powder is 3.5g / cm 3 ;

[0038] Step 102, trimming the outer surface of the molybdenum rod blank obtained in step 101 to remove its corner burrs and surface defects, and then placing it in a vacuum furnace for high-temperature sintering treatment to obtain a molybdenum rod semi-finished product; the specific process...

Embodiment 2

[0048] The preparation method of the present embodiment comprises the following steps:

[0049] Step 1, preparation of molybdenum rods:

[0050] Step 101, put the molybdenum powder into the prefabricated rubber sleeve mold, seal it with a rubber stopper after vibration treatment, and then place it in the pressure chamber of the cold isostatic press for 10 minutes of cold isostatic pressing under the condition of a pressure of 150 MPa, The molybdenum rod biscuit is obtained after demolding; the particle size of the molybdenum powder is 2.0 μm, the mass purity of the molybdenum powder is 99.95%, the mass content of oxygen is 1500 ppm, and the tap density of the molybdenum powder is 2.0 g / cm 3 ;

[0051] Step 102, trimming the outer surface of the molybdenum rod blank obtained in step 101 to remove its corner burrs and surface defects, and then placing it in a vacuum furnace for high-temperature sintering treatment to obtain a molybdenum rod semi-finished product; the specific p...

Embodiment 3

[0061] The preparation method of the present embodiment comprises the following steps:

[0062] Step 1, preparation of molybdenum rods:

[0063] Step 101, put the molybdenum powder into the prefabricated rubber sleeve mold, seal it with a rubber stopper after vibration treatment, and then place it in the pressure chamber of the cold isostatic press for 15 minutes of cold isostatic pressing under the condition of 230 MPa After cold isostatic pressing, molybdenum rod green body is obtained after demoulding; the particle size of the molybdenum powder is 4.5 μm, the mass purity of the molybdenum powder is 99.97%, the mass content of oxygen is 1200ppm, and the tap density of the molybdenum powder is 6.0 g / cm 3 ;

[0064] Step 102, trimming the outer surface of the molybdenum rod blank obtained in step 101 to remove its corner burrs and surface defects, and then placing it in a vacuum furnace for high-temperature sintering treatment to obtain a molybdenum rod semi-finished product...

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Abstract

The invention discloses a method for preparing a molybdenum metal grid. The method comprises: 1. sequentially processing molybdenum powder through cold isostatic pressing, high-temperature sintering, hot precision forging and straightening to obtain a molybdenum rod; 2. adopting a plasma rotating electrode The powder-making equipment processes molybdenum rods into spherical molybdenum powder; 3. Using spherical molybdenum powder as raw material, a powder bed electron beam 3D printer is used to prepare a molybdenum metal grid molding, and then it is obtained by annealing, hot isostatic pressing and alkali washing in sequence. Molybdenum metal grille. The present invention prepares molybdenum powder into spherical molybdenum powder, and then uses a powder bed electron beam 3D printer to prepare a molybdenum metal grid. The spherical molybdenum powder has good fluidity, dense and uniform particles, and is tightly combined after rapid melting, and the heat of the electron beam is relatively high. The characteristics of molybdenum metal overcome the shortcomings of high strength, low plasticity, easy oxidation, poor formability, and difficulty in processing into complex structural and functional parts, improve the specifications and performance of molybdenum metal grids, and save production costs.

Description

technical field [0001] The invention belongs to the field of processing refractory metal materials, and in particular relates to a method for preparing a molybdenum metal grid. Background technique [0002] The melting point of molybdenum is 2620°C, the boiling point is 5560°C, and the coefficient of linear expansion is (5.8~6.2)×10 -6 %, molybdenum metal has the advantages of high temperature resistance, corrosion resistance, small expansion coefficient, excellent electrical conductivity and thermal conductivity, etc. At the same time, due to the strong bonding force between molybdenum atoms, molybdenum metal has high strength and high temperature at room temperature and high temperature. hardness. Therefore, molybdenum metal is widely used as an additive in the iron and steel smelting industry, as an electrode and packaging material in the power electronics industry, as a high-temperature resistant nozzle part in the aerospace field, as a corrosion-resistant and temperatu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/14B22F3/105B22F3/15B22F5/10B33Y10/00
CPCB22F3/15B22F5/10B22F9/14B33Y10/00B22F2998/10B22F10/00B22F10/25B22F10/28B22F10/64B22F10/50B22F10/80B22F2003/248Y02P10/25
Inventor 韩强王峰何凯李晶
Owner JINDUICHENG MOLYBDENUM CO LTD
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