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Au-Pd-Mo alloy solder for high-temperature soldering

A technology of alloy solder and molybdenum alloy, which is applied in the direction of welding/cutting medium/material, welding equipment, welding medium, etc., to achieve the effect of good compatibility

Inactive Publication Date: 2012-01-25
SINO PLATINUM METALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, the solder can withstand H at 1200°C 2 , N 2 , NH 3 gas corrosion and the N 2 h 2 Liquid, distilled water, ethanol, and isopropanol have good compatibility (corrosion rate is less than 0.001mm / year). On the other hand, the soldering temperature of the solder needs to be suitable for soldering at 1400°C.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] Embodiment 1: Practical application The composition of the solder is: Au: 70%, Pd: 29%, Mo: 1%. Melting temperature: 1384℃~1406℃. Shear strength τ of solder-welded TZM (molybdenum alloy) / WRe25 (tungsten-rhenium alloy) joints b ≥150Mpa. The wetting angle of TZM (molybdenum alloy) at 1415°C is 9.6°; the wetting angle of WRe25 (tungsten-rhenium alloy) is 7.1°; the airtightness of brazed joints, leakage rate: ≤8×10 -8 Toor l / s.

Embodiment 2

[0009] Embodiment 2: Practical application The composition of the solder is: Au: 70%, Pd: 28%, Mo: 2%. Melting temperature: 1370℃~1418℃. Shear strength τ of solder-welded TZM (molybdenum alloy) / WRe25 (tungsten-rhenium alloy) joints b ≥154Mpa. At 1430°C, the wetting angle to TZM (molybdenum alloy) is 7.7°; the wetting angle to WRe25 (tungsten-rhenium alloy) is 6.9°.

Embodiment 3

[0010] Embodiment 3: Practical application The composition of the solder is: Au: 70%, Pd: 26%, Mo: 4%. Melting temperature: 1358℃~1426℃. Shear strength τ of solder-welded TZM (molybdenum alloy) / WRe25 (tungsten-rhenium alloy) joints b ≥270Mpa. At 1440°C, the wetting angle to TZM (molybdenum alloy) is 6.0°; the wetting angle to WRe25 (tungsten-rhenium alloy) is 5.7°.

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PUM

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Abstract

The invention discloses an Au-Pd-Mo alloy solder, which is capable of bearing the corrosion of H2, N2 and NH3 gases at 1200 DEG C, and simultaneously, has higher compatibility on N2H2 liquid. The Au-Pd-Mo alloy solder comprises the following components in percent: 70 percent of Au, 26-29 percent of Pd and 1-4 percent of Mo. The melting temperature of the solder rises along with the increase of the Mo content, and the N2H2 corrosion resistance level of the solder is the first level (the corrosion rate is lower than 0.001mm per year). The solder has good processing plasticity; the cold deformation reaches 80 percent; and the solder can be prepared into 0.04mm foil, and can also be prepared into a 0.2mm wire as needed.

Description

technical field [0001] The invention relates to the field of nonferrous metallurgy, in particular to a method for AuPdMo alloy solder used for high-temperature brazing. Background technique [0002] Structural parts working at high temperature are required to connect two different materials due to their higher work and the particularity of the connection structure. The connection method is the most effective and reliable method by brazing connection, and the weld seam connected has a certain resistance. Shear strength, tightness, heat cycle resistance and special medium corrosion resistance. [0003] There are many types of high-temperature brazing filler metals, and Ni-based alloys are commonly used. The melting temperature of this kind of brazing filler metals is lower than 1200°C, and it is not suitable for use above 1200°C. On the one hand, the solder can withstand H at 1200°C 2 , N 2 , NH 3 gas corrosion and the N 2 h 2 Liquid, distilled water, ethanol, and isopro...

Claims

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Application Information

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IPC IPC(8): B23K35/30
Inventor 罗锡明戴华李伟许昆陈登权
Owner SINO PLATINUM METALS CO LTD
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