Nickel-based single-crystal high-temperature alloy connecting powder brazing filler metal as well as preparation method and application thereof

A nickel-based superalloy and alloy powder technology, applied in welding equipment, metal processing equipment, welding/cutting medium/material, etc., can solve the problems of inability to meet the use requirements, low high temperature performance, etc. The effect of high temperature and small dissolution

Active Publication Date: 2019-03-05
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, among the existing solders in China, there are few solders that can be used for brazing nickel-based superalloys with excellent high-temperature properties such as CMSX-4, and the high-temperature properties are generally low, which cannot meet the use requirements.

Method used

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  • Nickel-based single-crystal high-temperature alloy connecting powder brazing filler metal as well as preparation method and application thereof
  • Nickel-based single-crystal high-temperature alloy connecting powder brazing filler metal as well as preparation method and application thereof
  • Nickel-based single-crystal high-temperature alloy connecting powder brazing filler metal as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The base material to be welded in this embodiment is a nickel-based superalloy CMSX-4, and the chemical composition of the alloy is (wt.%): Ni-9Co-6.5Cr-6W-6.5Ta-5.6Al-3Re-1Ti-0.6Mo.

[0032] The chemical composition of the solder is (wt.%): Ni-14Cr-9.5Co-4Al-4W-4Mo-5Ti-0.1Si-0.8B.

[0033] Brazing filler metal preparation method: mix the raw materials with a purity greater than 99.99% in proportion and put them into a vacuum arc melting furnace to melt them into alloy ingots. The melting process is: 1590°C / 1min→1550°C / 10min→1350°C / 10min→1450°C Pouring; after that, the smelted alloy ingot is melted into a metal liquid flow with a temperature higher than 1400 °C, and the metal liquid flow is impacted with argon gas to atomize it into fine droplets, which form alloy powder after rapid cooling, and sieve out no more than 200 mesh powder.

[0034] Before welding, the solid solution nickel-based superalloy CMSX-4 is processed into Use No. 800 sandpaper to grind the surfac...

Embodiment 2

[0037] The base material to be welded in this embodiment is a nickel-based superalloy CMSX-4, and the chemical composition of the alloy is (wt.%): Ni-9Co-6.5Cr-6W-6.5Ta-5.6Al-3Re-1Ti-0.6Mo.

[0038] The chemical composition of the solder is (wt.%): Ni-14Cr-9.5Co-4Al-4W-4Mo-5Ti-0.1Si-1B.

[0039] Brazing filler metal preparation method: mix the raw materials with a purity greater than 99.99% in proportion and put them into a vacuum arc melting furnace to melt them into alloy ingots. The melting process is: 1590°C / 1min→1550°C / 10min→1350°C / 10min→1450°C Pouring; after that, the smelted alloy ingot is melted into a metal liquid flow with a temperature higher than 1400 °C, and the metal liquid flow is impacted with argon gas to atomize it into fine droplets, which form alloy powder after rapid cooling, and sieve out no more than 200 mesh powder.

[0040] Before welding, the solid solution nickel-based superalloy CMSX-4 is processed into Use No. 800 sandpaper to grind the surface t...

Embodiment 3

[0043] The base material to be welded in this embodiment is a nickel-based superalloy CMSX-4, and the chemical composition of the alloy is (wt.%): Ni-9Co-6.5Cr-6W-6.5Ta-5.6Al-3Re-1Ti-0.6Mo.

[0044] The solder composition is (wt.%): Ni-12Cr-9.5Co-3.5Al-4.5W-3.5Mo-3Ti-3Si-0.8B.

[0045] Brazing filler metal preparation method: mix the raw materials with a purity greater than 99.99% in proportion and put them into a vacuum arc melting furnace to melt them into alloy ingots. The melting process is: 1590°C / 1min→1550°C / 10min→1350°C / 10min→1450°C Pouring; after that, the smelted alloy ingot is melted into a metal liquid flow with a temperature higher than 1400 °C, and the metal liquid flow is impacted with argon gas to atomize it into fine droplets, which form alloy powder after rapid cooling, and sieve out no more than 200 mesh powder.

[0046] Before welding, the solid solution nickel-based superalloy CMSX-4 is processed into Use No. 800 sandpaper to grind the surface to be weld...

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Abstract

The invention discloses a nickel-based single-crystal high-temperature alloy connecting powder brazing filler metal as well as a preparation method and an application thereof, and belongs to the technical field of high-temperature alloy brazing materials. The brazing filler metal comprises the following chemical components (wt.%) of 10.0%-15.0% of Cr, 7.5%-13.5% of Co, 3.0%-8.5% of W, 0-4.5% of Al, 2.5%-5.5% of Mo, 2.5%-6.5% of Ti, 0-5.0% of Si, 0-2.0% of B, 0-3.0% of Fe and the balance Ni. The powder brazing filler metal is prepared by an atomization powder spraying method and is used for high-temperature alloy brazing connection. The brazing temperature is 1220-1320 DEG C, and the brazing time is 10-360 minutes. According to the powder brazing filler metal, the high-temperature performance brazing connection problem of a single crystal high-temperature alloy is solved and the important application value is achieved.

Description

technical field [0001] The invention relates to the technical field of superalloy connection, in particular to a nickel-based single crystal superalloy connection powder solder and its preparation method and application. The solder alloy is suitable for vacuum brazing of superalloys. Background technique [0002] Since the 1980s, single crystal superalloys have rapidly developed into the material of choice for advanced aero-engine blades and other key hot-end components due to their excellent high-temperature mechanical properties, oxidation resistance, and hot-corrosion properties, and are widely used in service and aero-engines under development. Re-containing single crystal superalloy, as the most critical strategic material for high-efficiency air-cooled combined blades, is preparing to be applied to advanced aero-engines under research with greater thrust-to-weight ratio and higher thermal efficiency. CMSX-4 alloy is the second developed by C-M Company. The Re-containin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B23K35/40B23K1/008
CPCB23K1/008B23K35/3033B23K35/40
Inventor 孙元侯星宇刘纪德李博金涛周亦胄
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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