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Preparation method of molybdenum-ruthenium alloy wire for high-temperature brazing

A ruthenium alloy and brazing technology, which is applied in the field of high-temperature brazed molybdenum-ruthenium alloy wire preparation, can solve the problems of difficulty in obtaining molybdenum-ruthenium alloy wire, uneven coating thickness, and many impurities in the composition, and achieve good process characteristics, High cost performance and uniform alloy composition

Active Publication Date: 2022-05-10
CHONGQING MATERIALS RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the brazing process of molybdenum and ruthenium powder, due to the uneven coating thickness and many impurities in the composition, there are many welding defects and unstable quality.
If molybdenum-ruthenium powder is prepared into molybdenum-ruthenium alloy, it has brittleness, high hardness and hydrogen absorption effect. It is difficult to obtain molybdenum-ruthenium alloy wire by traditional wire drawing process. Therefore, there is no molybdenum-ruthenium alloy wire in the market at present. Material related products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1) Prepare molybdenum powder and ruthenium powder with a purity of 99.99% and powder particles ≤ 20 microns. According to the alloy ratio of the lowest melting point of the eutectic reaction found in the molybdenum-ruthenium alloy phase diagram, weigh 113.46g of molybdenum powder and 86.54g of ruthenium powder Place in a three-dimensional mixer and mix for 12 hours at a speed of 30r / min, so that the molybdenum powder and ruthenium powder are fully mixed evenly to obtain the mixed material 1;

[0028] 2) Add 4g of methyl cellulose to mixed material 1, put it in a three-dimensional mixer and mix for 1 hour at a speed of 30r / min to get mixed material 2;

[0029] 3) Add 20.4g of deionized water to the mixed powder 2, and then stir in a high-speed mixer for 0.5h at a stirring speed of 200r / min to obtain a mud;

[0030] 4) Use the SC vacuum mud refining machine of Xiangtan Xiangyi Instrument Co., Ltd., and vacuum the mud for 15 minutes at a vacuum degree of 5-10Pa to obtain a...

Embodiment 2

[0042] 1) Prepare molybdenum powder and ruthenium powder with a purity of 99.99% and powder particles ≤ 20 microns. According to the alloy ratio of the lowest melting point of the eutectic reaction found in the molybdenum-ruthenium alloy phase diagram, weigh 113.46g of molybdenum powder and 86.54g of ruthenium powder , placed in a three-dimensional mixer and mixed for 15 hours at a speed of 45r / min to fully mix the molybdenum powder and ruthenium powder to obtain the mixed material 1;

[0043] 2) Add 8g of methyl cellulose to the mixture 1, place it in a three-dimensional mixer and mix for 2 hours at a speed of 45r / min to obtain the mixture 2;

[0044] 3) Add 30.6g of deionized water to the mixed powder 2, and then stir in a high-speed mixer for 1 hour at a stirring speed of 250r / min to obtain a mud;

[0045] 4) Use the SC vacuum mud refining machine of Xiangtan Xiangyi Instrument Co., Ltd., under the vacuum degree of 5-10Pa, vacuum mud for 20 minutes to obtain a mud column wi...

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Abstract

The invention relates to a preparation method of a molybdenum-ruthenium alloy wire for high-temperature brazing, which comprises the following steps: 1) finding an alloy ratio of a lowest point of a melting point of eutectic reaction according to a molybdenum-ruthenium alloy phase diagram, taking molybdenum powder and ruthenium powder, uniformly mixing, adding a binder, uniformly mixing to obtain a mixed material, adding deionized water into the mixed material, and stirring to obtain a pug; 2) performing vacuum pugging on the pug to obtain a pug column, extruding the pug column into a green body, drying the green body in the shade at room temperature, and straightening the green body; the alloy wire prepared through the method is uniform in component, the wire diameter is smaller than 1 mm, the production cost is low, and the requirements of high-melting-point alloy base metal such as tungsten, molybdenum and rhenium for high-temperature brazing filler metal are met.

Description

technical field [0001] The invention relates to a method for preparing solder, in particular to a method for preparing molybdenum-ruthenium alloy wire for high-temperature brazing. Background technique [0002] For high-temperature welding, for high-melting-point alloy base materials such as tungsten, molybdenum, and rhenium with a melting point higher than 2000°C, brazing filler metals are required. At present, molybdenum and ruthenium powder are usually used as brazing filler metals. However, during the brazing process of molybdenum and ruthenium powder, due to reasons such as uneven coating thickness and many impurities in the composition, there are many welding defects and unstable quality. If molybdenum-ruthenium powder is prepared into molybdenum-ruthenium alloy, it has brittleness, high hardness and hydrogen absorption effect. It is difficult to obtain molybdenum-ruthenium alloy wire by traditional wire drawing process. Therefore, there is no molybdenum-ruthenium allo...

Claims

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Application Information

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IPC IPC(8): C22C1/04C22C27/04B22F3/02B22F3/10B22F5/12
CPCC22C1/045C22C27/04B22F5/12B22F3/02B22F3/1007
Inventor 陈喜王小宇刘奇薄新维韩校宇姚志远刘成超王焱辉何浩然
Owner CHONGQING MATERIALS RES INST
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