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Nickel base alloy welding wire for high-temperature alloy fusion welding and preparation method and application thereof

A technology of nickel-based alloys and superalloys, applied in welding equipment, welding equipment, metal processing equipment, etc., can solve the problems of unable to meet the requirements of use, unable to be prepared into wire, easy to form cracks, etc., to achieve moderate fluidity, temperature High, low erosion effect

Active Publication Date: 2020-06-23
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

Generally speaking, nickel-based superalloys have excellent high-temperature performance, but the superalloys contain high melting point elements such as Al, Ti, W, and Mo, which are relatively high in solder, and cracks are easily formed during welding, and the weldability is poor. The welding position of superalloy structural parts must have excellent temperature bearing capacity and must not have welding defects
Among the existing welding wires in our country, there are few welding wires that can be used for fusion welding of superalloys, especially nickel-based superalloys with excellent high-temperature performance.
Moreover, the welding wire materials for high-performance welding of high-temperature alloys are usually similar in chemical composition to high-temperature alloys, with excellent high-temperature strength and high-temperature deformation resistance, and cannot be prepared into wire materials by traditional drawing methods.

Method used

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  • Nickel base alloy welding wire for high-temperature alloy fusion welding and preparation method and application thereof
  • Nickel base alloy welding wire for high-temperature alloy fusion welding and preparation method and application thereof
  • Nickel base alloy welding wire for high-temperature alloy fusion welding and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] In this embodiment, the base material to be welded is nickel-based superalloy K4951.

[0030] The chemical composition of the welding wire in this example is (wt.%): C 0.8%, Cr 15.0%, Co 15.5%, Al 8.5%, W5.5%, Mo 4.5%, Nb 4.5%, Y 0.5%, Fe 0.5%, Si 0.5%, the rest is Ni, the master alloy ingot is smelted in a vacuum melting furnace, and the master alloy ingot is smelted in a vacuum induction furnace. Master alloy ingots were produced.

[0031] Welding wire preparation method: Melt the master alloy ingot in a directional solidification furnace at a melting temperature of 1400°C, pour the melted master alloy liquid into an alumina ceramic shell with a cavity diameter of 2.1mm through the liquid outlet, and fill it with Pull out the ceramic shell at a pulling speed of 1 mm / min for directional solidification; break the solidified and cooled ceramic shell, take out the welding wire, and remove the scale on the welding wire on a centerless grinder to obtain the welding wire ma...

Embodiment 2

[0034] In this embodiment, the base material to be welded is nickel-based superalloy K4951.

[0035] The chemical composition of the welding wire in this example is (wt.%): C 0.5%, Cr 5.0%, Co 1.5%, Al 2.5%, W2.5%, Mo 1.5%, Nb 1.8%, Y 0.5%, Fe 0.5%, Si 0.3%, the rest is Ni, the master alloy ingot is smelted by vacuum melting furnace, and the master alloy ingot is smelted by vacuum induction furnace. , to obtain a master alloy ingot.

[0036] Welding wire preparation method: Melt the master alloy ingot in a directional solidification furnace at a melting temperature of 1600°C, pour the melted master alloy liquid into an alumina ceramic shell with a cavity diameter of 1.1 mm through the liquid outlet, and fill it with Pull out the ceramic shell at a pulling speed of 1mm / min for directional solidification; break the solidified and cooled ceramic shell, take out the welding wire, and remove the scale on the welding wire on a centerless grinder to obtain the welding wire material ...

Embodiment 3

[0039] In this embodiment, the base material to be welded is nickel-based superalloy K4951.

[0040]The chemical composition of the welding wire in this example is (wt.%): C 0.3%, Cr 10.0%, Co 2.5%, Al 4.5%, W7.5%, Mo 8.5%, Nb 7.5%, Y 0.5%, Fe 0.3%, Si0.5%, the rest is Ni, the master alloy ingot is smelted by vacuum melting furnace, and the master alloy ingot is smelted by vacuum induction furnace. , to obtain a master alloy ingot.

[0041] Welding wire preparation method: Melt the master alloy ingot in a directional solidification furnace at a melting temperature of 1500°C, pour the melted master alloy liquid into an alumina ceramic shell with a cavity diameter of 1.9 mm through the liquid outlet, and fill it with Pull out the ceramic shell at a pulling speed of 1mm / min for directional solidification; break the solidified and cooled ceramic shell, take out the welding wire, remove the scale on the welding wire on a centerless grinder, and obtain the welding wire with a diame...

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Abstract

The invention discloses a nickel base alloy welding wire for high-temperature alloy fusion welding and a preparation method and application thereof, and belongs to the technical field of high-temperature alloy fusion welding materials. The nickel base alloy welding wire is prepared from the chemical components in percentage by weight: 0-1% of C, 5.0-25.0% of Cr, 1.5-25.5% of Co, 1-12.5% of Al, 0.5-20.5% of W, 1.5-10.5% of Mo, 0.8-12.5% of Nb, 0-1.0% of Y, 0-1.0% of Fe, 0-2.0% of Si, and the balance of Ni. The nickel base alloy welding wire is prepared by a directional solidification method, and is used for high-temperature alloy fusion welding connection. A welding current is 20-35A, and a voltage is 10-12V. The casting defect repairing problem of a precipitation strengthening nickel basehigh-temperature alloy is solved, the current situation that the nickel base high-temperature alloy welding wire is difficult to prepare due to the fact that the deformation resistance of the nickel base high-temperature alloy is high is changed, and important application value is achieved.

Description

technical field [0001] The invention relates to the technical field of high-temperature alloy connection, in particular to a nickel-based alloy welding wire for high-temperature alloy fusion welding and its preparation method and application. The welding wire is suitable for high-temperature alloy fusion welding connection. Background technique [0002] With the development of overall precision casting technology, cast superalloys are gradually being widely used in the aerospace industry. However, as the temperature of the air inlet of the advanced aero-engine turbine and the thrust-to-weight ratio are getting higher and higher, and the requirements for reducing the weight of the engine are becoming more and more stringent. As the structure of superalloy structural parts is becoming more and more complex, the precision is getting higher and higher, and the manufacturing difficulty is increasing. The final structure cannot be realized by precision casting alone. It must be co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B23K35/40B23K31/02
CPCB23K35/3033B23K35/40B23K31/02B23K35/0261
Inventor 孙元侯星宇王龙杨彦红周亦胄
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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