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Mixed powder brazing filler metal, preparation method thereof, welding interlayer and welding method

A technology of mixing powder and welding method, which is applied in the direction of welding equipment, welding medium, welding/cutting medium/material, etc., can solve the problem of lack of fiber material, etc., and achieve the effect of high weld strength

Pending Publication Date: 2022-04-22
CHINA-UKRAINE INST OF WELDING GUANGDONG ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the prior art, there is a lack of fiber materials that can meet both small gap welding and large gap welding, and ensure that the welded seam after welding has excellent mechanical properties.

Method used

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  • Mixed powder brazing filler metal, preparation method thereof, welding interlayer and welding method
  • Mixed powder brazing filler metal, preparation method thereof, welding interlayer and welding method
  • Mixed powder brazing filler metal, preparation method thereof, welding interlayer and welding method

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preparation example Construction

[0038] Second, embodiments of the present invention provides a method for preparing the above-described mixed powder filler, comprising: mixing the first nickel-based alloy powder and the second nickel-based alloy powder according to the proportion.

[0039] Third, embodiments of the present invention provides a welding intermediate layer, prepared by the above-described mixed powder filler. Specifically, the mixed powder fiber is placed between two materials to be welded, and then continues to weld, and then forms a welding intermediate layer.

[0040] Fourth, embodiments of the present invention provides a welding method, comprising: the above-described mixed powder filler is disposed between the butt welding surfaces of the nickel-based superalloy to be welded, and then welded. Among them, the welding conditions include: temperature of 1180-1270 ° C, pressure of 0.1-10MPa, holding time of 0.5-8 hours. The use of the above welding conditions can ensure the smooth progress of wel...

Embodiment 1

[0043]Embodiments of the present invention provides a mixed powder filler comprising a 70% first nickel-based intermediate layer alloy powder and 30% second nickel-based alloy powder. Among them, the chemical composition of the first nickel-based alloy powder: C0.1%, Cr12.5%, Co6.8%, Mo0.9%, W4.5%, Al2.9%, Ti4.7%, Nb1.2%, Ta3.4%, Re2.9%, B1.6%, V1.2%, Ru1.5%, Si0.3% and the residual amount is nickel, the particle size of the first nickel-based alloy is 400 mesh, the particle size of the second nickel-based alloy is 100 mesh, the composition of the second nickel-based alloy is consistent with the composition of nickel-based superalloy, and the nickel-based superalloy is IC10 directional solidification superalloy bar, purchased from the Institute of Metal Research of the Chinese Academy of Sciences, the first nickel-based alloy powder and the second nickel-based alloy powder are prepared by aerosol method.

[0044] The present embodiment provides a welding method comprising:

[004...

Embodiment 2

[0050] Embodiments of the present invention provides a mixed powder brazing material comprising 60% first nickel-based alloy powder and 40% second nickel-based alloy powder. Among them, the chemical composition of the first nickel-based alloy powder: C0.1%, Cr12.4%, Co6.8%, Mo0.9%, W4.5%, Al2.9%, Ti4.7%, Nb1.2%, Ta3.4%, Re3.0%, B1.7%, V1.2%, Ru2.4%, Si0.3% and the margin is nickel, the particle size of the first nickel-based alloy is 500 mesh, the particle size of the second nickel-based alloy is 150 mesh, the composition of the second nickel-based alloy is consistent with the composition of nickel-based superalloy, and the nickel-based superalloy is IC10 directional solidification superalloy bar, purchased from the Institute of Metal Research, Chinese Academy of Sciences.

[0051] The present embodiment provides a welding method comprising: the cleaning of the IC10 bar to be welded in the fixture, the welding bar sandwiched between the above-described mixed powder fiber compositi...

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Abstract

The invention relates to the technical field of welding, in particular to mixed powder brazing filler metal, a preparation method of the mixed powder brazing filler metal, a welding middle layer and a welding method. The mixed powder brazing filler metal is used for brazing or TLP diffusion welding of large gaps and small gaps of the nickel-based high-temperature alloy; the mixed powder brazing filler metal comprises, by weight, x% of first nickel-based alloy powder and (100-x)% of second nickel-based alloy powder, and x ranges from 50 to 70. The fiber material has good wettability and diffusivity, the post-welding gap is 0.10 mm-0. 40 mm, that is, large-gap welding and small-gap welding of brazing or TLP diffusion welding are met at the same time, and the welding seam strength is high.

Description

Technical field [0001] The present invention relates to the field of welding technology, in particular, to a mixed powder filler and a preparation method thereof, a welding intermediate layer and a welding method. Background [0002] Nickel-based superalloys, with their excellent high-temperature mechanical properties, microstructure stability, oxidation resistance and thermal corrosion resistance, have become the preferred materials for the manufacture of turbine blades, guide vanes and other key hot-end components for aero engines and industrial gas turbines. In order to improve the temperature carrying capacity of nickel-based superalloy blades, it is necessary to design them into a more complex hollow structure with internal air-cooled channels, but relying on current casting technology, it is difficult to cast blades with complex structures at one time, and it is necessary to manufacture them with high-performance joining technology. [0003] The most common joining methods...

Claims

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Application Information

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IPC IPC(8): B23K35/28B23K35/30B23K35/40
CPCB23K35/286B23K35/304B23K35/3046B23K35/308B23K35/40
Inventor 李琪刘凤美熊敏高海涛何煌易耀勇温志峰张雪莹李丽坤
Owner CHINA-UKRAINE INST OF WELDING GUANGDONG ACAD OF SCI
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