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ti 2 Alnb-based alloy homogeneous or dissimilar material brazing medium-temperature Ti-based solder and its preparation method and brazing process

A technology based on alloys and brazing filler metals, applied in welding/cutting media/materials, welding equipment, manufacturing tools, etc., can solve problems such as failure to meet service requirements, changes in mechanical properties, and reduced high-temperature performance of welded joints. The effect of safe use process, elevated use temperature, and good fluidity

Active Publication Date: 2021-10-22
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, the existing Ti-based solder has the following three deficiencies: first, Ti 2 As a titanium alloy material used at high temperature, AlNb-based alloys have a higher service temperature than ordinary titanium alloys. Using low-temperature Ti-based solders for welding (such as: Ti-Zr-Cu-Ni-based solders, etc.) will lead to high temperatures in welded joints. performance reduction; secondly, Ti 2 The commonly used solid solution temperature of AlNb-based alloy is 980℃ / 2~4h. If high-temperature Ti-based solder is used for welding (such as: Ti-Ni-Nb series, Ti-Cr-Ta / Nb series solder, etc.), it will cause The phase transformation of the base metal structure also changes its mechanical properties, so that it cannot reach Ti 2 The service requirements of AlNb-based alloy base metal; in addition, Ti 2 AlNb-based alloys also represent a class of titanium alloys with similar phase transition characteristics, and there are few studies on the brazing filler metals that can meet the brazing requirements of this type of titanium alloys.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] In this example, Ti 2 Homogenous brazing of AlNb-based alloys, by weight percent, Ti 2 AlNb-based alloy medium-temperature Ti-based solder: Ni 28%-33%, Co 2-7% or Mo 3%-7%, choose one of the two, Al, B, Fe, Cu, Cr, Mn, Mg, Ag , one or more of Nb and Zn≤5%. Among them, the addition amount of each element is Al: 0-5%, B: 0-3%, Fe: 0-5%, Cu: 0-5%, Mn: 0-5%, Cr: 0-5%, Mg: 0-5%, Ag: 0-4%, Nb: 0-5%, and Zn: 0-4%; the rest is Ti element and unavoidable impurity elements. Among the impurity elements of the solder, N<0.02wt.%, H<0.02wt.%, O<0.2wt.%; trace elements are common elements in titanium alloys, such as: Zr, Hf, V, Ta, W , Au, Si, Sn, Pd, Ga, etc., or two or more, with a total content of 1%; among them, the combinations of minor elements and trace elements are listed as follows:

[0058] (1) Add one element alone, Al, B, Fe, Cu, Cr, Mn, Mg, Ag, Nb, Zn, Zr, Hf, V, Ta, W, Au, Si, Sn, Pd and Ga, add The amount is 3%;

[0059] (2) Add two elements, Al+B, Al+Nb, Al+Cu, ...

Embodiment 2

[0100] In this example, Ti 2 Dissimilar brazing of AlNb-based alloys and γ-TiAl-based alloys, by weight percent, Ti 2 AlNb-based alloy medium-temperature Ti-based solder: Ni 30%-35%, Co 5-7% or Mo 1%-8%, choose one of the two, Al, B, Fe, Cu, Cr, Mn, Mg, Ag , one or more of Nb and Zn≤5%. Among them, the addition amount of each element is Al: 0-5%, B: 0-3%, Fe: 0-5%, Cu: 0-5%, Mn: 0-5%, Cr: 0-5%, Mg: 0-5%, Ag: 0-4%, Nb: 0-5%, and Zn: 0-4%; the rest is Ti element and unavoidable impurity elements. Among the impurity elements of the solder, N<0.02wt.%, H<0.02wt.%, O<0.2wt.%; trace elements are common elements in titanium alloys, such as: Zr, Hf, V, Ta, W , Au, Si, Sn, Pd, Ga, etc. or two or more, with a total content of 0.5%; the combinations of minor elements and trace elements are listed as follows:

[0101] (1) Add one element alone, Al, B, Fe, Cu, Cr, Mn, Mg, Ag, Nb, Zn, Zr, Hf, V, Ta, W, Au, Si, Sn, Pd and Ga, add The amount is 2%;

[0102] (2) Add two elements, Al+B, A...

Embodiment 3

[0143] In this example, Ti 2 AlNb-based alloys with α 2 -Ti 3 Dissimilar brazing of Al-based alloys, by weight percent, Ti 2 AlNb-based alloy medium-temperature Ti-based solder is: Ni 25% to 30%, Co 1 to 4% or Mo 2 to 5%, choose one of the two, Al, B, Fe, Cu, Cr, Mn, Mg, Ag, One or more of Nb and Zn≤5%. Among them, the addition amount of each element is Al: 0-5%, B: 0-3%, Fe: 0-5%, Cu: 0-5%, Mn: 0-5%, Cr: 0-5%, Mg: 0-5%, Ag: 0-4%, Nb: 0-5%, and Zn: 0-4%; the rest is Ti element and unavoidable impurity elements. Among the impurity elements of the solder, N<0.02wt.%, H<0.02wt.%, O<0.2wt.%; trace elements are common elements in titanium alloys, such as: Zr, Hf, V, Ta, W , Au, Si, Sn, Pd, Ga, etc. or two or more, with a total content of 2%; among them, the combinations of minor elements and trace elements are listed as follows:

[0144] (1) Add one element alone, Al, B, Fe, Cu, Cr, Mn, Mg, Ag, Nb, Zn, Zr, Hf, V, Ta, W, Au, Si, Sn, Pd and Ga, add The amount is 4%;

[0145] ...

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Abstract

The invention belongs to the field of welding, in particular to a Ti 2 AlNb-based alloy homogeneous or dissimilar material brazing medium-temperature Ti-based filler metal, its preparation method and brazing process. In terms of weight percentage, the composition and content of the solder are: Ni 15% to 40%, Co 1% to 15% or Mo 1% to 15%, choose one of the two, a small amount of elements Al, B, Fe, Cu , Cr, Mn, Mg, Ag, Nb and Zn or one or two or more ≤ 5%, trace elements Zr, Hf, V, Ta, W, Au, Si, Sn, Pd, Ga one or two or more ≤ 2%, and the rest is Ti element and unavoidable impurity elements. The preparation method of brazing material: 1. Weighing the raw materials; 2. Melting the master alloy of the brazing material; The brazing material of the present invention is brazed according to the brazing process of 980 DEG C to 1040 DEG C and 0 to 120 minutes. Compared with the existing solder, the brazing filler metal prepared by the invention has suitable melting point, excellent wettability and high-temperature mechanical properties, and the brazing filler metal preparation and brazing process are simple.

Description

technical field [0001] The invention belongs to the field of welding, in particular to a Ti 2 AlNb-based alloy homogeneous or dissimilar material brazing medium-temperature Ti-based filler metal, its preparation method and brazing process. Background technique [0002] As we all know, the engine is the heart of various aircraft, and the biggest constraint on its development is the development of aviation and aerospace engine materials. Due to the harsh service conditions of engines in the aviation and aerospace fields, this requires materials not only to have excellent room temperature performance, but also to have excellent high temperature performance. At the same time, the material must have good processing performance and high specific strength, so as to facilitate the processing of parts and reduce the specific gravity of components. [0003] Nickel-based superalloys have high specific strength, good oxidation resistance, excellent thermal corrosion resistance, and go...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/32B23K1/008B23K1/002B23K3/08B23K103/24
CPCB23K1/002B23K1/008B23K3/087B23K35/325B23K2103/24
Inventor 蔡雨升王清江杨锐
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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