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Nickel-cobalt-based wrought superalloy and preparation method thereof

A technology for deforming high-temperature alloys and high-temperature alloys, which is applied in the field of high-temperature alloys to achieve excellent heat and corrosion resistance, no pollution cost, and easy operation

Active Publication Date: 2020-08-14
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, there is currently no related technology for strengthening alloys by introducing special grain boundaries in nickel-cobalt-based wrought superalloys

Method used

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  • Nickel-cobalt-based wrought superalloy and preparation method thereof
  • Nickel-cobalt-based wrought superalloy and preparation method thereof
  • Nickel-cobalt-based wrought superalloy and preparation method thereof

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preparation example Construction

[0051] Specifically, the preparation method of the nickel-cobalt-based deformed superalloy provided in the embodiment of the present invention includes the following steps:

[0052] Solution treatment: the hot-rolled sheet (that is, the nickel-cobalt-based superalloy after hot-rolling treatment) is solution-treated at a temperature of 0.85-0.95Tm for 2-4h, and then water-cooled to room temperature, and the solution-treated sheet is Pickling and drying. Here, the Tm mentioned in the present invention refers to the melting point temperature of the nickel-cobalt-based superalloy.

[0053] Deformation treatment: cold rolling the plate after solid solution treatment with a total deformation of 50-80%, lubricated with emulsion, and the reduction rate of each pass is 10-15%.

[0054] Annealing treatment: Before annealing, wash and dry the cold-rolled sheet with alkali, then anneal the cold-rolled sheet at a temperature of 0.8-0.9Tm in a vacuum or a hydrogen-reducing environment for ...

Embodiment 1

[0062] In this embodiment, a nickel-cobalt-based deformed superalloy is prepared, which includes the following steps:

[0063] Preparation of ingots: Put the raw materials into a high-frequency vacuum induction melting furnace, heat the temperature to 1500°C, and the vacuum degree is 0.5×10 -2Pa, after all the raw materials are melted, it is refined at a temperature of 1550°C for 6 minutes, and then an inert gas is introduced, and a crucible is cast into an ingot. Among them, the formula of raw materials is as follows: Co 25%, Ta 2%, Cr 15%, Ti 5.5%, Al 2%, W 2%, Mo 2%, Nb 1%, Mn 0.5%, V 0.1%, C 0.003% , Zr 0.02%, B 0.02%, and the balance is Ni. Among them, the Tm of the nickel-cobalt-based superalloy is 1335°C, and the solid solution temperature of the precipitated phase is 1160°C.

[0064] Preparation of electroslag refining ingot: After the ingot is cooled, cut the riser of the ingot and polish the surface, use the polished ingot as the electrode of electroslag remelting,...

Embodiment 2

[0072] In this embodiment, a nickel-cobalt-based deformed superalloy is prepared, which includes the following steps:

[0073] Preparation of ingots: Put the raw materials into the high-frequency vacuum induction melting furnace according to the above ratio, heat the temperature to 1600°C, and the vacuum degree is 0.6×10 -2 Pa, after all the raw materials are melted, refine at a temperature of 1550°C for 5 minutes, then pass in an inert gas, and cast a crucible into an ingot. Among them, the formula of raw materials is as follows: Co 25%, Ta 2%, Cr 15%, Ti 5.5%, Al 2%, W2%, Mo 2%, Nb 1%, Mn 0.5%, V 0.1%, C 0.003%, Zr 0.02%, B 0.02%, and the balance being Ni. Among them, the Tm of the nickel-cobalt-based superalloy is 1335°C, and the solid solution temperature of the precipitated phase is 1160°C.

[0074] Preparation of electroslag refining ingot: After the ingot is cooled, cut the riser of the ingot and polish the surface, use the polished ingot as the electrode of electrosl...

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Abstract

The invention relates to a nickel-cobalt-based wrought superalloy and a preparation method thereof, and relates to the technical field of superalloys. According to the mainly adopted technical scheme,the nickel-cobalt-based wrought superalloy is the characterized in that the nickel-cobalt-based wrought superalloy has a special grain boundary, and the volume fraction of the special grain boundaryis larger than or equal to 25%; the preparation method of the nickel-cobalt-based wrought superalloy comprises the following steps that solution treatment is carried out on the nickel-cobalt-based wrought superalloy subjected to hot rolling treatment; the nickel-cobalt-based superalloy subjected to solution treatment is subjected to cold rolling with the total deformation of 50%-80%; in a vacuum or hydrogen reduction environment, the nickel-cobalt-based superalloy subjected to deformation treatment is annealed for 5 min-30 min at the temperature of 0.8 Tm-0.9 Tm; and aging treatment is carriedout on the annealed nickel-cobalt-based superalloy to obtain the nickel-cobalt-based wrought superalloy. The preparation method of the nickel-cobalt-based wrought superalloy is mainly used for introducing the special grain boundary into the nickel-cobalt-based wrought superalloy, the volume fraction of the special grain boundary is increased, the strength of the alloy is improved on the premise that the alloying degree is not increased, and a strength guarantee is provided for the nickel-cobalt-based wrought superalloy as a high-temperature structural part.

Description

technical field [0001] The invention relates to the technical field of high-temperature alloys, in particular to a nickel-cobalt-based deformed high-temperature alloy and a preparation method thereof. Background technique [0002] Superalloys are key materials in the fields of aviation power, gas turbines, supercritical power plants, nuclear energy and petrochemicals, and their performance is an important symbol that determines the level of national technological development. Plates or foils of wrought superalloys can be used as thermal protection components for aircraft outer panels, flame tubes or combustion chambers of engines; these applications have harsh service environments and require wrought superalloys to be lightweight, heat-resistant, corrosion-resistant, and long-lasting at high temperatures. characteristics, to meet the lightweight and high Mach performance index of the aircraft, so that it has excellent maneuverability. [0003] With the development of techno...

Claims

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Application Information

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IPC IPC(8): C22C19/05C22C30/00C22F1/10C22F1/02C22C1/02
CPCC22C1/023C22C19/055C22C19/056C22C30/00C22F1/002C22F1/02C22F1/10
Inventor 张瑞王新广崔传勇周亦胄孙晓峰
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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