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a ti 2 Medium-temperature ZR-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 failure to meet service requirements, lower high-temperature performance of welded joints, and changes in mechanical properties, and achieve preparation and The effect of safe use process, increased use temperature, and low price

Active Publication Date: 2022-04-05
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 base metal undergoes a phase transformation at around 1050 °C, which also changes its mechanical properties, so that it cannot reach Ti 2 Service requirements for AlNb-based alloy base metals; finally, 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

[0059] In this example, Ti 2 Homogenous brazing of AlNb-based alloys, by weight percent, Ti 2 The composition and content of medium-temperature Zr-based solder for AlNb-based alloys are: Fe 10% to 15%, Nb 10% to 15% or Cu 5 to 10%, Al, B, Co, Cr, Mn , Mg, Ni, Ag and Zn one or two or more ≤ 5%. Among them, the addition amount of each element is Al: 0-5%, B: 0-3%, Co: 0-5%, Mn: 0-5%, Cr: 0-5%, Mg: 0-5%, Ni: 0-5%, Ag: 0-4% and Zn: 0-4%; the rest is Zr 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: Ti, 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:

[0060] (1) Add one element alone, Al, B, Co, Cr, Mn, Mg, Ni, Ag, Zn, Ti, Hf, V, Ta, Mo, W, Au, Si, Sn, Pd and Ga, add The amount is 3%;

[0061] (2) Add two element...

Embodiment 2

[0102] In this example, Ti 2 Dissimilar brazing of AlNb-based alloys and γ-TiAl-based alloys, by weight percent, Ti 2 The composition and content of the medium-temperature Zr-based solder for AlNb-based alloys are: Fe 15% to 20%, Nb 8% to 12% or Cu10 to 20%. Al, B, Co, Cr, Mn, One or more than two of Mg, Ni, Ag and Zn≤5%. Among them, the addition amount of each element is Al: 0-5%, B: 0-3%, Co: 0-5%, Mn: 0-5%, Cr: 0-5%, Mg: 0-5%, Ni: 0-5%, Ag: 0-4% and Zn: 0-4%; the rest is Zr 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: Ti, Hf, V, Ta, Mo , W, Au, Si, Sn, Pd, Ga, etc. or two or more, with a total content of 0.5%; among them, the combinations of minor elements and trace elements are listed as follows:

[0103] (1) Add one element alone, Al, B, Co, Cr, Mn, Mg, Ni, Ag, Zn, Ti, Hf, V, Ta, Mo, W, Au, Si, Sn, Pd and Ga, add The amount is 2%...

Embodiment 3

[0145] In this example, Ti 2 AlNb-based alloys with α 2 -Ti 3 Dissimilar brazing of Al-based alloys, by weight percent, Ti 2 The composition and content of medium-temperature Zr-based solder for AlNb-based alloys are: Fe 25% to 30%, Nb 5% to 10% or Cu13% to 17%, choose one of the two, Al, B, Co, Cr, Mn , Mg, Ni, Ag and Zn one or two or more ≤ 5%. Among them, the addition amount of each element is Al: 0-5%, B: 0-3%, Co: 0-5%, Mn: 0-5%, Cr: 0-5%, Mg: 0-5%, Ni: 0-5%, Ag: 0-4%, and Zn: 0-4%; the rest is Zr 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: Ti, 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:

[0146] ((1) Adding one element alone, Al, B, Co, Cr, Mn, Mg, Ni, Ag, Zn, Ti, Hf, V, Ta, Mo, W, Au, Si, Sn, Pd...

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Abstract

The invention belongs to the field of welding, in particular to a Ti 2 The invention relates to a medium-temperature Zr-based solder special 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 composition and content of the solder are: Fe 5% to 30%, Nb 1% to 15% or Cu 1% to 20%, choose one of the two, and a small amount of elements Al, B, Co, Cr , one or more of Mn, Mg, Ni, Ag and Zn≤5%, one or more of trace elements Ti, Hf, V, Ta, Mo, W, Au, Si, Sn, Pd, Ga≤ 2%, the rest is Zr 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 960 DEG C to 1030 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 medium-temperature Zr-based solder special 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): B23K35/32B23K1/008B23K1/002B23K3/08B23K103/24
CPCB23K35/325B23K1/008B23K1/002B23K3/08B23K2103/24
Inventor 蔡雨升吉海宾赵子博王清江雷家峰杨锐
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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