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ti 2 Medium-temperature Ti-based brazing filler metal for Alnb-based alloy homogeneous or dissimilar materials 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 reduced high-temperature performance of welded joints, failure to meet service requirements, and changes in mechanical properties. Safe and inexpensive results in lifting, preparation and use

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, 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 alloys is 980°C / 2~4h. If high-temperature Ti-based solders are used for welding (such as: Ti-Ni-Nb series, Ti-Cr-Ta / Nb series solders, 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 Medium-temperature Ti-based solder for AlNb-based alloys: Al 5%-10%, Co 20%-30% or Ni 20%-30%, Fe, Cu, B, Cr, Mn, Mg, Ag , one or more of Nb and Zn≤5%. Among them, the addition amount of each element is Fe: 0-5%, B: 0-3%, 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, Mo , 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, Fe, Cu, B, Cr, Mn, Mg, Ag, Nb, Zn, Zr, Hf, V, Ta, Mo, W, Au, Si, Sn, Pd and Ga, add The amount is 3%;

[0059] (2) Add two elements, Fe+B, Fe+Nb, Fe+Cu, Nb+Cr or Cu+B, etc., the a...

Embodiment 2

[0100] In this example, Ti 2 Dissimilar brazing of AlNb-based alloys and γ-TiAl-based alloys, by weight percent, Ti 2 Medium-temperature Ti-based solder for AlNb-based alloys: Al 5%-10%, Co 15%-20% or Ni 18%-25%, Fe, Cu, B, Cr, Mn, Mg, Ag , one or more of Nb and Zn≤5%. Among them, the addition amount of each element is Fe: 0-5%, B: 0-3%, 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, Mo , 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, Fe, Cu, B, Cr, Mn, Mg, Ag, Nb, Zn, Zr, Hf, V, Ta, Mo, W, Au, Si, Sn, Pd and Ga, add The amount is 2%;

[0102] (2) Add two elements, Fe+B, Fe+Nb, Fe+Cu, Nb+Cr or Cu...

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 Medium-temperature Ti-based solder for AlNb-based alloys: Al 5%-10%, Co 20%-23% or Ni 25%-30%, Fe, Cu, B, Cr, Mn, Mg, Ag , one or more of Nb and Zn≤5%. Among them, the addition amount of each element is Fe: 0-5%, B: 0-3%, 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, Mo , 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, Fe, Cu, B, Cr, Mn, Mg, Ag, Nb, Zn, Zr, Hf, V, Ta, Mo, W, Au, Si, Sn, Pd and Ga, add The amount is 4%;

[0145] (2) Add two elements, Fe+B, Fe+Nb, ...

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Abstract

The invention belongs to the field of welding, in particular to a Ti 2 The invention relates to a special medium-temperature Ti-based solder for brazing of the same material or different materials of AlNb-based alloys, a preparation method thereof, and a brazing process. In terms of weight percentage, the solder composition is as follows: Al 1% to 20%, Co 15% to 40% or Ni 15% to 40%, choose one of the two, Fe, Cu, B, Cr, Mn, Mg, Ag , one or more of Nb and Zn ≤ 5%, one or more of Zr, Hf, V, Ta, Mo, W, Au, Si, Sn, Pd, Ga ≤ 2%, the rest is Ti and not Avoid 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 970 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 The invention relates to a special medium-temperature Ti-based solder for brazing of the same material or different materials of AlNb-based alloys, a preparation method thereof, and a 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 res...

Claims

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Application Information

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