A kind of niobium-boron binary alloy brazing material

A technology of binary alloy and brazing material, which is applied in the field of alloy brazing material, can solve the problems of high production cost and high price, and achieve the effects of low cost, good fluidity and low vapor pressure

Active Publication Date: 2011-12-21
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high price of Pt and Pt-based alloy raw materials and high production costs, it limits its large-scale application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The niobium-boron binary alloy brazing filler metal of the present embodiment is made up of the raw material of following weight percentage: Boron 1.5%, the balance is niobium and unavoidable impurity, and the weight percentage content of Zn, Cd and Pb element is all different in the described impurity More than 0.001%; ​​the melting temperature of the brazing material is 1600°C-1780°C, and the brazing material is in powder form.

[0015] The preparation method of the niobium-boron binary alloy brazing filler metal of the present embodiment is: according to 1.5 (wt)% B, the balance is Nb batching, adopts electric arc furnace to melt into alloy ingot, then alloy ingot is prepared into amorphous foil Then the amorphous foil is ground in a high-energy ball mill, and finally sieved and pickled to obtain niobium-boron binary alloy brazing powder.

[0016] The niobium-boron binary alloy brazing filler metal of this embodiment is carried out the welding process test of brazing...

Embodiment 2

[0018] The niobium-boron binary alloy brazing filler metal of the present embodiment is made up of the raw material of following weight percent: boron 3.5%, surplus is niobium and unavoidable impurity, and the weight percent content of Zn, Cd and Pb element is all different in the described impurity Greater than 0.001%; ​​the melting temperature of the brazing material is 1600°C-1730°C, and the brazing material is in powder form.

[0019] The preparation method of the niobium-boron binary alloy brazing filler metal of this embodiment is: according to 3.5 (wt)% B, the balance is Nb batching, adopts electric arc furnace to melt into alloy ingot, then alloy ingot is prepared into amorphous foil Then the amorphous foil is ground in a high-energy ball mill, and finally sieved and pickled to obtain niobium-boron binary alloy brazing powder.

[0020] The niobium-boron binary alloy brazing filler metal of this embodiment is carried out the welding process test of brazing filler metal ...

Embodiment 3

[0022] The niobium-boron binary alloy brazing filler metal of the present embodiment is made up of the raw material of following weight percentage: Boron 5.5%, the balance is niobium and unavoidable impurity, and the weight percentage content of Zn, Cd and Pb element is all different in the described impurity Greater than 0.001%; ​​the melting temperature of the brazing material is 1600°C-1800°C, and the brazing material is in powder form.

[0023] The preparation method of the niobium-boron binary alloy brazing filler metal of this embodiment is: according to 5.5 (wt)% B, the balance is Nb batching, adopts electric arc furnace to melt into alloy ingot, then alloy ingot is prepared into amorphous foil Then the amorphous foil is ground in a high-energy ball mill, and finally sieved and pickled to obtain niobium-boron binary alloy brazing powder.

[0024] The niobium-boron binary alloy brazing filler metal of this embodiment is carried out the welding process test of brazing fil...

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Abstract

The invention discloses a niobium-boron binary alloy brazing material, and the brazing material comprises the following raw materials by weight percent: 1.5%-5.5% of boron and the balance of niobium and inevitable impurities, wherein the content by weight percent of each of Zn, Cd and Pb elements in the impurities is not greater than 0.001%. The niobium-boron binary alloy brazing material is low in cost and low in steam pressure and can be used in a high-reliability cathode environment of a vacuum electronic device, the melting temperature of the brazing material is 1600 DEG C-1800 DEG C, thebrazing temperature is 1650 DEG C-1900 DEG C, and the niobium-boron binary alloy brazing material is suitable for brazing refractory metals, namely W and Mo and alloys thereof, under an Ar atmosphereor vacuum state; after the brazing material is in brazing connection with the refractory metals, namely the W and the Mo, the wettability and the spreadability are good, the brazing material is good in flowability, strong in gap filling capability and good in high-temperature strength of welding lines; and the steam pressure of the brazing material is lower than 1*10<-5>Pa under the vacuum working condition of a cathode weld assembly at the temperature of 1000 DEG C-1200 DEG C.

Description

technical field [0001] The invention belongs to the technical field of alloy brazing materials, and in particular relates to a niobium-boron binary alloy brazing material. 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 1600 ° C and 1800 ° C, and the vapor pressure is low. Alloys with very little solder. Currently, only Pt and Pt-based alloys can meet such requirements. However, due to the high price of Pt and Pt-based alloy raw materials and high production costs, its mass application is limited. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a low-cost, good wettability and spreadability with refractory metals W and Mo, melting temperature between 1600°C and 1800°C, steam The niobium-boron binary alloy brazing material that can be used in the hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/32
Inventor 李银娥马光郑晶孙晓亮操齐高李进田广民
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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