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Fine Mo-Ru-B brazing filler metal powder and preparing method thereof

A powder preparation, mo-ru-b technology, applied in welding equipment, manufacturing tools, metal processing equipment, etc., can solve the problems of poor use process, uneven composition, etc., to improve the use process performance, uniform composition, The effect of improving brazing properties

Active Publication Date: 2014-09-03
SINO PLATINUM METALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention proposes a high-temperature brazing material Mo-Ru-B alloy brazing filler metal for the first time, and can solve the problems such as inhomogeneous composition and poor processability in the preparation of Mo-Ru-B brazing filler metal by using the prior art.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1 A kind of solder composition (mass fraction): 30%Mo-64%Ru-6%B solder powder preparation method

[0016] According to the composition of the solder design mass fraction of 30%Mo-64%Ru-6%B, calculate the required weight of ruthenium trichloride, ammonium molybdate and ammonium borate, put it into a porcelain crucible, and pour it into a PH=1 Hydrochloric acid solution, fully stirred, mixed and dried at 100°C. Then, the dried mixture was heated to remove ammonium chloride, and the heating was carried out at 400°C; finally, the mixture was reduced with hydrogen at a high temperature, the treatment temperature was 950°C, and the time: 2h. After the mixture was cooled, the Grind and sieve to make Mo-Ru-B solder powder with required composition and specifications.

[0017] The particle size of the Mo-Ru-B solder powder prepared by the above method: 90% powder particle size≤6 microns, maximum particle size≤10 microns, wherein 88% powder particles are composed of M...

Embodiment 2

[0020] A kind of solder composition (mass fraction): 30%Mo-65%Ru-5%B solder powder preparation method

[0021] According to the composition of the solder design mass fraction of 30%Mo-65%Ru-5%B, calculate the required weight of ruthenium trichloride, ammonium molybdate and ammonium borate, put it into a porcelain crucible, and pour it into a PH=1 Hydrochloric acid solution, fully stirred, mixed and dried at 150°C. Then, heat the dried mixture at 450°C to remove ammonium chloride; finally, reduce the mixture with hydrogen at high temperature, the treatment temperature is 940°C, time: 2h, after the mixture is cooled, it is ground and sieved , to make the required composition and specification Mo-Ru-B solder powder.

[0022] The particle size of the Mo-Ru-B prepared by the above method using the Mo-Ru-B solder powder prepared by the above method; 90% powder particle size≤6 microns, maximum particle size≤10 microns, wherein 90% powder particles are made of Mo-Ru -B compound comp...

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Abstract

The invention discloses fine Mo-Ru-B brazing filler metal powder and a preparing method of the fine Mo-Ru-B brazing filler metal powder and further discloses a method for preparing the Mo-Ru-B brazing filler metal powder through chemical coprecipitation. The preparing method of the fine Mo-Ru-B brazing filler metal powder comprises the steps that a mixed solution is prepared through ruthenium trichloride, ammonium molybdate and ammonium biborate, the mixed solution is heated after being dried at a low temperature so that ammonium chloride can be removed, reduction treatment is conducted through hydrogen, grinding and screening are conducted, and then the Mo-Ru-B brazing filler metal powder containing required components is obtained. The particle size of 90% of the prepared brazing filler metal powder is smaller than or equal to 6 microns, and the maximum particle size of the prepared brazing filler metal powder is smaller than or equal to 10 microns. The Mo-Ru-B brazing filler metal powder prepared with the method has the advantages that the powder is fine, namely the particle size of 90% of the Mo-Ru-B brazing filler metal powder is smaller than or equal to 6 microns, the components are even, and thus the requirement for enabling a micro-part of a high-power efficient microwave tube cathode assembly to be coated with the powder for brazing can be met.

Description

technical field [0001] The invention relates to Mo-Ru-B powder components and a manufacturing method thereof, in particular to a preparation process for manufacturing microfine Mo-Ru-B solder powder by a chemical reaction co-precipitation method. Background technique [0002] In the brazing of some high-power and high-efficiency microwave tube cathode assemblies, it is necessary to braze at a temperature range of 1700-1750°C, but there are no relevant reports at home and abroad on the special high-temperature solder for cathode assemblies with a melting temperature within this range. The present invention proposes a high-temperature brazing material Mo-Ru-B alloy brazing filler metal for the first time. The composition of the brazing filler metal is Mo: 30%±1%, Ru: 64%±1%, B: 6%±1%. The brazing temperature of the material is 1700-1750°C, which can meet the brazing requirements of the above-mentioned high-power and high-efficiency microwave tube cathode assembly. [0003] Be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/22B22F1/00C22C5/04B23K35/24
Inventor 陈南光李伟
Owner SINO PLATINUM METALS CO LTD
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