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Ruthenium-niobium binary alloy high-temperature brazing material

A technology of binary alloy and brazing filler metal, applied in the field of alloy brazing filler metal, can solve the problems of high price and limit a large number of applications, and achieve the effects of low price, improved bonding strength, and improved high temperature performance

Inactive Publication Date: 2009-04-22
XIAN RAREALLOYS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the expensive raw materials of Pt and Pt-based alloys, the production cost is more than three times that of ruthenium-based alloys, which limits its large-scale application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The brazing material alloy of this embodiment is compounded by 27wt% Nb, and Ru is the balance. The ingot is smelted into an ingot by an electric arc furnace, and the ingot is processed by mechanical cutting or mechanically crushed, then ground by a high-energy ball mill, finally sieved, pickled, and reduced to obtain the ruthenium-niobium binary alloy powder solder of the present invention, and then in H 2 The welding process test of brazing material was carried out in the gas furnace. The wetting and spreading of the ruthenium-niobium solder on the base metal was good, and there was no corrosion to the substrate. The spreading area of ​​the solder after melting was more than three times that of the original solder placement area. The angle is less than 10°.

Embodiment 2

[0016] The brazing material alloy of this embodiment is compounded according to 33wt% Nb, and Ru is the balance. The ingot is smelted into an ingot by an electric arc furnace, and the ingot is machined or crushed by a machine, then ground by a high-energy ball mill, finally sieved, pickled, and reduced to obtain the ruthenium-niobium binary alloy powder solder of the present invention. Then in H 2 The welding process test of brazing material was carried out in the gas furnace. The wetting and spreading of the ruthenium-niobium solder on the base metal was good, and there was no corrosion to the substrate. The spreading area of ​​the solder after melting was more than three times that of the original solder placement area. The angle is less than 10°.

Embodiment 3

[0018] The brazing material alloy of this embodiment is compounded according to 38wt% Nb, and Ru is the balance. The ingot is smelted into an ingot by an electric arc furnace, and the ingot is machined or crushed by a machine, then ground by a high-energy ball mill, finally sieved, pickled, and reduced to obtain the ruthenium-niobium binary alloy powder solder of the present invention. Then in H 2 Welding process test of solder in gas furnace. Ruthenium-niobium solder has good wetting and spreadability on the base metal, and has no erosion on the substrate. After melting, the spreading area of ​​the solder is more than three times that of the original solder placement area, and the wetting angle is less than 10°.

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Abstract

The invention discloses a high-reliability cathode component for a vacuum electron device, wherein the ruthenium-niobium binary alloy high-temperature cored solder taking refractory metal tungsten and molybdenum as base materials consists of the following materials in weight percentage: 27 to 38 percent of Nb, and the balance being ruthenium and inevitable micro impurities; and the contents of Zn, Pb, Bi and Mg elements in the micro impurities are no more than 0.001 percent respectively. The cored solder can be used to braze-solder tungsten, molybdenum and alloy of tungsten or molybdenum in the H2 or Ar gas atmosphere and in a vacuum state; the cored solder does not absorb hydrogen, can spread over base metal, and has good wettability; the wet angle is less than 10 degrees; and when a soldering piece is soldered under the vacuum working condition with a temperature of between 1,000 and 1,200 DEG C, the vapor pressure of the cored solder is not higher than 1x10<-5>Pa; moreover, the cored solder is low in price, and is the first choice of solder replacing the Pt and Pt-based solder for the braze solder of the cathode component for the vacuum electron device, and the melting temperature of the cored solder is between 1,700 and 1,850 DEG C.

Description

technical field [0001] The invention relates to an alloy brazing material, in particular to a ruthenium-niobium binary alloy high-temperature brazing material which is used for high-reliability cathode components in vacuum electronic devices and uses refractory metal tungsten and molybdenum as base materials. Background technique [0002] At present, there are dozens of brazing materials that can braze W and Mo, including Cu-based, Ni-based, Mo-based, Pd-based, Pt-based solders, but the melting temperature is between 1700°C and 1850°C, and the vapor pressure is low. , does not react with hydrogen, and there are very few alloy solders that can braze W and Mo in hydrogen. Currently, only Pt and Pt-based alloys can meet such requirements. However, due to the expensive raw materials of Pt and Pt-based alloys, the production cost is more than three times that of ruthenium-based alloys, which limits its large-scale application. Contents of the invention [0003] The purpose of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/32
Inventor 李银娥马光孙晓亮贾志华王轶姜婷
Owner XIAN RAREALLOYS
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