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A kind of chromium-cobalt-based superalloy and its application

A high-temperature alloy, cobalt-based technology, applied in the field of alloys, can solve the problems of lack of coherent strengthening mechanism and no major progress in high-temperature performance, and achieve the effect of enhancing thermal corrosion resistance and tensile performance

Active Publication Date: 2020-11-24
东北大学秦皇岛分校
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] Traditional cobalt-based superalloys mainly rely on carbide strengthening, lacking a coherent strengthening mechanism similar to the γ / γ′ two-phase structure in nickel-based superalloys, and there is no major progress in the research and development of high-temperature properties

Method used

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  • A kind of chromium-cobalt-based superalloy and its application
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  • A kind of chromium-cobalt-based superalloy and its application

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Embodiment Construction

[0051] The present invention will be further described below in conjunction with specific implementation cases, but the present invention is not limited to these embodiments, and examples of said embodiments are shown in the accompanying drawings.

[0052] This embodiment prepares a chromium-cobalt-based superalloy, which is composed of Cr, Co, Ni, Al and Ti elements, and the atomic percentage content of Cr is 2 at.%, Ni is 30 at.%, Al is 7.5 at.%, Ti %, the balance is Co; the sum of the atomic percentages of Al and Ti is not more than 10 at.%, and the sum of the atomic percentages of Cr, Co, Ni, Al and Ti is 100 at. %;

[0053] In this example, four cobalt-based superalloy ingots were prepared, followed by heat treatment, and the structure and performance of the chromium-containing cobalt-based superalloy and the other three cobalt-based superalloys were compared and analyzed:

[0054] In this example, four cobalt-based superalloy ingots were prepared by using a vacuum induc...

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Abstract

A chromium-cobalt-based superalloy and its application, belonging to the field of alloys, the chromium-cobalt-based superalloy is composed of Cr, Co, Ni, Al and Ti elements, and the atomic percentage of Cr is (1-2) at.%, Ni is (24-34) at.%, Al is (6.5-8.5) at.%, Ti is (1.5-3.5) at.%, and the balance is Co; the sum of the atomic percentages of Al and Ti is not more than 10 at.%, the sum of the atomic percentages of Cr, Co, Ni, Al and Ti is 100 at.%. The cobalt-based high-temperature alloy containing chromium element of the present invention has excellent high-temperature corrosion resistance and tensile performance, and the alloy of the present invention is applied to high-temperature component materials for aerospace engine manufacturing, industrial gas turbine manufacturing, and heat exchanger manufacturing.

Description

technical field [0001] The invention belongs to the field of alloys, in particular to a cobalt-based superalloy containing chromium and its application. Background technique [0002] Superalloys refer to a class of austenitic metal materials that use iron, cobalt, and nickel as the matrix and can serve stably for a long time in a high-temperature environment above 600°C and under certain stress conditions. They have good structural stability and excellent high-temperature strength. And thermal fatigue resistance, also has excellent oxidation resistance and thermal corrosion resistance. Among them, the most widely used is the nickel-based superalloy, which is due to the existence of the γ / γ′ two-phase structure in the nickel-based superalloy, which effectively strengthens the alloy. However, after decades of performance improvement, the nickel-based superalloy , the working temperature has reached the theoretical limit value, it is difficult to meet the continuously increasi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C19/07C22F1/10
CPCC22C19/07C22F1/10
Inventor 高秋志张海莲屈福刘子昀
Owner 东北大学秦皇岛分校
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