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Palladium-containing high-temperature nickel-base multicomponent alloy brazing materials

A brazing material and alloy technology, which is applied in the direction of welding/cutting medium/material, welding medium, welding equipment, etc., can solve the problem of poor high-temperature oxidation resistance and corrosion resistance of manganese-based brazing material, reduced strength of brazing seam, and reliable High performance requirements and other issues, to achieve good wettability, improve fluidity, excellent corrosion resistance

Inactive Publication Date: 2006-08-02
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nickel-based brazing material has good plasticity and medium strength, and is often used for brazing refractory metals such as tungsten and molybdenum, but its thermal strength is not enough, and it has poor corrosion resistance when used in strong corrosive media.
Cobalt-based brazing materials are mostly composed of Co-Cr-Ni solid solution and other elements. Because of the high melting temperature of Co-Cr-Ni solid solution, boron is often added to reduce the melting temperature of the alloy, but boron is easy to form Co 3 B brittle compound, which reduces the strength of the brazing joint and limits its use
Manganese-based brazing materials are not suitable for use in vacuum brazing due to their high vapor pressure. At the same time, due to their poor high-temperature oxidation and corrosion resistance, although they have high room temperature strength and high temperature strength, Its application is also limited in some high reliability requirements, high temperature and corrosive media

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] According to the nominal composition of the alloy, the ingot is smelted into an ingot by a conventional intermediate frequency induction furnace. The weight percentage of the alloy is: Pd: 21%, Au: 25%, Fe: 16.2%, Co: 2.3%, W: 0.6%, and the balance is Nickel and unavoidable impurities, the prepared alloy is processed into a sheet with a thickness of 0.12mm, and the ruthenium alloy and superalloy are brazed by conventional methods, which have good wettability on the base metal and a spreading area of ​​505mm 2 , The maximum filling gap of the brazing material is 0.25mm, and the weld seam has a tensile strength of 167MPa at a high temperature of 1100°C.

Embodiment 2

[0015] According to the nominal composition of the alloy, the ingot is smelted into an ingot by a conventional intermediate frequency induction furnace. The weight percentage of the alloy is: Pd: 30%, Au: 20%, Fe: 10.5%, Co: 4.5%, W: 1.3%, and the balance is Nickel and unavoidable impurities, the prepared alloy is processed into a sheet with a thickness of 0.10mm, and the iridium alloy and superalloy are brazed by conventional methods, which have good wettability on the base metal and a spreading area of ​​530mm 2 , The maximum filling gap of the brazing material is 0.25mm, and the weld seam has a tensile strength of 202MPa at a high temperature of 1100°C.

Embodiment 3

[0017] According to the nominal composition of the alloy, the ingot is smelted into an ingot by a conventional intermediate frequency induction furnace. The weight percentage of the alloy is: Pd: 30%, Au: 15%, Fe: 12.5%, Co: 3.5%, W: 2%, and the balance is Nickel and unavoidable impurities, the prepared alloy is processed into a wire with a diameter of 0.5mm, and the ruthenium alloy and superalloy are brazed by conventional methods, which have good wettability on the base metal and a spreading area of ​​565mm 2 , The maximum filling gap of the brazing material is 0.25mm, and the weld seam has a tensile strength of 190MPa at a high temperature of 1100°C.

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Abstract

A high-temp PdNi-based multi-alloy solder for the Ru alloy, Ir alloy and high-temp alloy contains Pd (20-30 wt.%), Au (15-25), Fe (10-20), Co (2-8), W (0.5-6) and Ni (rest).

Description

technical field [0001] A palladium-containing nickel-based multi-element alloy high-temperature brazing material relates to a nickel-based multi-element brazing material with ruthenium alloys, iridium alloys, and high-temperature alloys as base materials used in high-temperature and strong corrosive medium environments. Background technique [0002] At present, brazing materials used in high temperature environments mainly include nickel-based brazing materials, manganese-based brazing materials and cobalt-based brazing materials. Nickel-based brazing material has good plasticity and medium strength, and is often used for brazing refractory metals such as tungsten and molybdenum, but its thermal strength is not enough, and it has poor corrosion resistance when used in strong corrosive media. Cobalt-based brazing materials are mostly composed of Co-Cr-Ni solid solution and other elements. Because of the high melting temperature of Co-Cr-Ni solid solution, boron is often added...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30
Inventor 李明利马蕊侠杜平田广民党红云
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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