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A kind of tininbzr high-temperature solder for tial alloy and preparation method and brazing method thereof

A high-temperature brazing material and brazing method technology, which is applied in metal processing equipment, welding equipment, manufacturing tools, etc., can solve the problems of limiting the high-temperature performance of joints, not mentioning the high-temperature performance of joints, etc., to ensure temperature-resistant performance and low cost. , to ensure the effect of high temperature performance

Active Publication Date: 2021-12-24
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Abstract
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  • Application Information

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Problems solved by technology

And the high temperature performance of the joint is not mentioned in the relevant reports, it is generally believed that the existence of the Cu-containing compound phase will limit the high temperature performance of the joint
[0006] In addition, some people use Ti-40Ni-20Nb (at.%) as the solder, and the maximum room temperature shear strength of the joint is 308MPa under the brazing specification of 1220°C / 10min, but when tested at 600°C, its shear strength Has dropped to 172MPa

Method used

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  • A kind of tininbzr high-temperature solder for tial alloy and preparation method and brazing method thereof
  • A kind of tininbzr high-temperature solder for tial alloy and preparation method and brazing method thereof
  • A kind of tininbzr high-temperature solder for tial alloy and preparation method and brazing method thereof

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Embodiment Construction

[0037] Below in conjunction with embodiment technical solution of the present invention will be described in further detail:

[0038] The following table shows the embodiments of the TiNiNbZr high-temperature brazing filler metal described in the technical solution of the present invention and the composition and weight percentage composition of each embodiment.

[0039]

[0040]

[0041] The TiNiNbZr high-temperature solder described in the foregoing embodiments is prepared according to the following process route:

[0042] (1) Select high-purity Ti, Ni, Nb, Zr with a purity of not less than 99.0%, and weigh by weight;

[0043] (2) Under the protection of argon, the above-mentioned simple substance is smelted into a solder alloy ingot by an arc melting method;

[0044] (3) Prepare solder by one of the following methods:

[0045] A, using argon atomization powder making equipment to prepare alloy powder solder;

[0046] B. Under the protection of argon, use the quench...

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Abstract

The invention relates to a TiNiNbZr high-temperature brazing filler metal for TiAl alloy, a preparation method and a brazing method thereof. The composition and weight percentage of the TiNiNbZr high-temperature brazing filler metal are: Ni: 18.5-21.5, Nb: 14.0-17.0, Zr: 8.0-9.5, Ti: margin. Using the brazing filler metal of the present invention at a brazing temperature of 1005°C to 1015°C for 9 to 11 minutes, the corresponding tensile strength of the brazed joint at room temperature reaches 372.3MPa to 382.9MPa, and the tensile strength at 750°C reaches 326.2MPa to 339.5MPa, which is higher than that at room temperature. The strength is maintained at 85.2% to 91.2%.

Description

technical field [0001] The invention belongs to the technical field of welding, and relates to a TiNiNbZr high-temperature brazing filler metal for TiAl alloy, a preparation method and a brazing method thereof. The TiNiNbZr high-temperature solder and its brazing method are suitable for the brazing connection of the TiAl alloy itself and other dissimilar metals. Background technique [0002] TiAl alloy is an intermetallic compound alloy, which has the advantages of low density, high specific strength, high specific stiffness, good oxidation resistance and creep resistance. It is one of the new lightweight high-temperature structural materials and has good application prospects in the aerospace field. Since the density of TiAl alloy is about 3.7~3.9g / cm 3 , less than half of the nickel-based superalloy, so using it to partially replace the nickel-based superalloy can achieve a significant weight reduction of related hot-end components, which is of great significance for imp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/32B23K1/008B23K103/14
CPCB23K35/325B23K1/008B23K35/0233B23K2103/14
Inventor 熊华平尚泳来任海水静永娟程耀永
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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