A kind of nickel-based foil strip solder for high-temperature alloy connection and its preparation method and application

A high-temperature alloy and brazing material technology, which is applied in welding equipment, metal processing equipment, welding/cutting media/materials, etc., can solve problems such as difficulty in realizing the final structure and complexity, and achieve a wide range of brazing temperatures, a wide range of applications, little corrosion effect

Active Publication Date: 2021-09-24
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, since the design of turbine working blades, guide vanes and other parts usually adopts complex internal cooling structure, it is difficult to realize the final structure only by precision casting technology, so it is necessary to use reliable connection technology to separate the complex blades cast and Components for high-performance connections
[0003] In recent years, due to the frequent update of blade materials and the increasingly harsh service environment of blades, the existing high-temperature brazing materials have been difficult to meet their use requirements, so there is an urgent need to develop new high-temperature alloy brazing materials with good manufacturability and excellent high-temperature mechanical properties. To solve high-performance joining problems of nickel-based and cobalt-based superalloys

Method used

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  • A kind of nickel-based foil strip solder for high-temperature alloy connection and its preparation method and application
  • A kind of nickel-based foil strip solder for high-temperature alloy connection and its preparation method and application
  • A kind of nickel-based foil strip solder for high-temperature alloy connection and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The parent material to be welded in this embodiment is a nickel-based superalloy DD405, and the chemical composition of the alloy is (wt.%):

[0033] Ni-7.5Co-7Cr-5W-6.5Ta-6Al-6.5Ta-3Re-0.15Hf-1.5Mo.

[0034] The solder composition is (wt.%):

[0035] Ni-7Co-10Cr-4Al-3Ti-8W-3Mo-0.3Fe-1Si-1B.

[0036] Brazing material 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 as follows: refining temperature 1480 ° C, refining time 25 minutes; Melt quick quenching method is used to prepare foil strips. The preparation process is as follows: copper roll speed is 26m / s, injection pressure is 35kPa, and melt temperature is 1480°C. The morphology of the prepared nickel-based foil ribbon solder is as follows: figure 1 As shown, it is band-shaped with a metallic luster on the surface. The DTA curve of foil strip in the present embodiment is a...

Embodiment 2

[0040] The parent material to be welded in this embodiment is a cobalt-based superalloy DZ40M, and the chemical composition of the alloy is (wt.%):

[0041] Co-11Ni-25Cr-7.5W-0.4Ta-1Al-0.2Ti-0.5C-0.2Ti-0.4Mo.

[0042] The chemical composition of solder is (wt.%):

[0043] Ni-16Co-16Cr-3Al-2Ti-8W-5Mo-0.8Fe-3Si-1.5B.

[0044] Brazing material 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 as follows: refining temperature 1460°C, refining time 25 minutes; Melt quick quenching method is used to prepare foil strips, and the preparation process is as follows: copper roll speed is 26m / s, injection pressure is 35kPa, and melt temperature is 1465°C. The prepared nickel-based foil ribbon brazing filler metal is strip-shaped, and the surface presents metallic luster.

[0045] Before welding, the cobalt-based superalloy DZ40M is processed into...

Embodiment 3

[0048] The parent material to be welded in this embodiment is a nickel-based superalloy CMSX-4, and the chemical composition of the alloy is (wt.%):

[0049] Ni-9.5Co-6.5Cr-6.5W-6.5Ta-5.5Al-3Re-1Ti-0.6Mo.

[0050] The chemical composition of solder is (wt.%):

[0051] Ni-6Co-13Cr-2Al-1Ti-4W-4Mo-2Fe-4Si-2B.

[0052] Brazing material 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 as follows: refining temperature 1420°C, refining time 20 minutes; Melt rapid quenching method is used to prepare foil strips. The preparation process is as follows: copper roll speed 26m / s, injection pressure 35kPa, melt temperature 1440°C. The prepared nickel-based foil ribbon brazing filler metal is strip-shaped, and the surface presents metallic luster.

[0053] Before welding, the solid solution nickel-based superalloy CMSX-4 is processed into Use No. 8...

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Abstract

The invention discloses a nickel-based foil brazing material for high-temperature alloy connection, a preparation method and application thereof, and belongs to the technical field of high-temperature alloy brazing materials. The solder chemical composition (wt.%): Cr 7.0~20.0%, Co 6.0~18.0%, W 2.0~10.0%, Al 0.5~6.5%, Mo 0.5~8.5%, Ti 0~7.0%, Si 0~ 7.0%, B 0-4.5%, Fe 0-5.5%, Ni is the balance. The foil brazing filler metal is prepared by a melt rapid quenching method, and is used for high temperature alloy brazing or TLP connection. The heating temperature is 1170-1290° C., and the holding time is 10-300 minutes. The invention solves the problem of high-performance connection of superalloys and has important application value.

Description

technical field [0001] The invention relates to the technical field of high-temperature alloy connection, in particular to a nickel-based foil strip solder for high-temperature alloy connection, a preparation method and application thereof, and the solder alloy is suitable for vacuum brazing of high-temperature alloys. Background technique [0002] Superalloys refer to high-alloyed iron-based, nickel-based or cobalt-based austenitic metal materials that can withstand relatively large and complex stresses at high temperatures above 600 °C and have surface stability. In the hot end parts of industrial gas turbines and aero engines. However, since the design of turbine working blades, guide vanes and other parts usually adopts complex internal cooling structure, it is difficult to realize the final structure only by precision casting technology, so it is necessary to use reliable connection technology to separate the complex blades cast and components for high-performance conn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30
CPCB23K35/304
Inventor 侯星宇孙元刘纪德李博周亦胄
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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