Preparation method for molybdenum and molybdenum alloy part

A technology of molybdenum alloy and parts, which is 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, and achieve the effects of improving plasticity, simplifying procedures, and improving manufacturing efficiency

Active Publication Date: 2016-07-27
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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Examples

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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 preparation method for a molybdenum and molybdenum alloy part. The preparation method comprises the following steps that molybdenum powder or molybdenum alloy powder is taken and mixed with rare earth element powder to obtain mixed powder, the mixed powder is added into an organic binder to be mixed evenly under the dark condition, and then a defoaming agent is added to remove foams to obtain a mixed sizing agent; the mixed sizing agent is contained in 3D printing forming equipment, controllable ultraviolet light beams are utilized, a face exposure or spot scanning manner is adopted, printing is carried out layer by layer according to a three-dimensional model of the part, and a molybdenum or molybdenum alloy part rough blank is prepared; and the rough blank is subjected to low-temperature ungrease treatment and hot isostatic pressing treatment, and the compact molybdenum or molybdenum alloy part is obtained. According to the method, the 3D printing rapid forming principle is utilized, the shape of the part is not constrained, the working procedure is simplified, the manufacturing period is shortened, and the product compactness is good.

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 Applications(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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