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A kind of preparation method of molybdenum and molybdenum alloy parts

A technology for molybdenum alloys and parts, applied in the field of material preparation, can solve the problems that the mold hot pressing sintering method is not suitable for the production of small batches and complex shapes of molybdenum or molybdenum alloy parts, so as to improve plasticity, refine grains, and improve manufacturing efficiency Effect

Active Publication Date: 2018-09-25
XIAN BRIGHT ADDTIVE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing molybdenum and molybdenum alloy parts, to solve the problem that the existing mold hot pressing sintering method is not suitable for the production of small batches and complex shapes of molybdenum or molybdenum alloy parts

Method used

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preparation example Construction

[0026] The invention provides a method for preparing molybdenum and molybdenum alloy parts. The method can be used for preparing pure molybdenum parts and molybdenum alloy parts. Molybdenum alloys include molybdenum-tungsten alloys, molybdenum-copper alloys, molybdenum-hafnium carbon alloys, cobalt-chromium-molybdenum alloys or titanium-zirconium-molybdenum alloys. The specific preparation method is as follows:

[0027] Step 1, raw material preparation

[0028] According to the volume ratio, 99%-99.5% molybdenum powder or molybdenum alloy powder is mixed with 0.5%-1% rare earth powder to obtain a mixed powder, and then the mixed powder is added into an organic binder and fully mixed. The organic adhesive is preferably epoxy acrylic resin, unsaturated polyester resin, polyurethane acrylate, polyester acrylate, polyester acrylic resin or aminoacrylic resin. The volume ratio of the mixed powder to the organic binder is 3:7-3:2. In order to ensure good fluidity of the slurry, t...

Embodiment 1

[0037] A preparation method of pure molybdenum parts, specifically comprising the following steps:

[0038] (1) Raw material preparation

[0039] Synthesis of unsaturated polyester resin: the unsaturated dibasic acid is mixed with maleic acid and fumaric acid 1:1, and a certain amount of phthalic anhydride and succinic acid are added at the same time, which can improve the elasticity of unsaturated polyester. Reduce volume shrinkage and increase plasticity of polyester. Dihydric alcohol adopts ethylene glycol.

[0040] The specific synthesis process of unsaturated polyester resin is: add unsaturated dibasic acid, dibasic alcohol and an appropriate amount of polymerization inhibitor into the reactor, feed nitrogen gas, stir and heat up to 160°C for reflux, and measure the acid value to 200mgKOH / g When the acid value reaches the set value, stop the reaction, cool down to about 80°C, and add 20% to 30% reactive diluent (styrene or acrylate reactive diluent) And an appropriate ...

Embodiment 2

[0047] A preparation method of pure molybdenum parts, specifically comprising the following steps:

[0048] (1) Raw material preparation

[0049] According to the volume ratio, take 99.5% pure molybdenum powder (particle size is 50 μm), mix it with 0.5% Y powder to obtain mixed powder, then add epoxy acrylic resin to the mixed powder under light-proof conditions and mix thoroughly, the mixed powder and epoxy The volume ratio of acrylic resin is 3:5. Then add defoamer metal soap to it, and stir slowly. After the bubbles inside the slurry subside, remove the floating matter or residue on the surface of the slurry to obtain a uniform and bubble-free mixed slurry; the defoamer accounts for 0.05% of the total volume of the mixed slurry. %.

[0050] (2) Rough blank manufacturing

[0051] Put the mixed slurry into the 3D printing molding equipment, use the controllable ultraviolet light beam, adopt the method of point scanning, print layer by layer according to the three-dimension...

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Abstract

The invention discloses a method for preparing molybdenum and molybdenum alloy parts, which comprises the following steps: taking molybdenum powder or molybdenum alloy powder, mixing it with rare earth element powder to obtain a mixed powder, and then adding the mixed powder into an organic adhesive under the condition of avoiding light. Mix the adhesive evenly, and then add a defoamer to remove the foam to obtain a mixed slurry; put the mixed slurry into the 3D printing molding equipment, use the controllable ultraviolet light beam, adopt the method of surface exposure or point scanning, and step by step according to the three-dimensional model of the part Layer printing to make molybdenum or molybdenum alloy parts rough blanks; low temperature degreasing treatment and hot isostatic pressing treatment on the rough blanks to obtain dense molybdenum or molybdenum alloy parts. This method utilizes the principle of 3D printing rapid prototyping, the shape of the parts is not restricted, the process is simplified, the manufacturing cycle is shortened, and the compactness of the product is better.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and in particular relates to a method for preparing molybdenum and molybdenum alloy parts. Background technique [0002] Molybdenum or molybdenum alloys have high strength at high temperatures (1100-1650°C), and are easier to process than tungsten, so they are used in electron tubes (grid and anode), electric light sources (support materials), metal processing tools (die-casting and extrusion) Mold and piercing plug) manufacturing sector and the aerospace industry are used. Molybdenum is resistant to corrosion by molten glass, and its oxides will not contaminate the glass. Molybdenum has been used in the glass industry as heating electrodes since 1943. Mo-30W alloy has excellent resistance to molten zinc corrosion and has been successfully used in the zinc smelting industry. Molybdenum is also used to make components such as heat exchangers and valves in the production of sulfuric...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/105B22F3/15B22F1/00B33Y10/00
CPCB22F3/15B33Y10/00B22F2998/10B22F10/00B22F1/102B22F10/16B22F12/41B22F3/105Y02P10/25
Inventor 薛蕾赵晓明王俊伟杨东辉
Owner XIAN BRIGHT ADDTIVE TECH CO LTD
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