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A kind of nickel base superalloy and design method thereof

A technology of nickel-based superalloy and design method, which is applied in the direction of additive manufacturing and additive processing, and can solve the problems of easy cracks, low high-temperature strength of the alloy, and poor formability

Active Publication Date: 2022-05-24
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When using alloys developed for traditional preparation technologies for additive manufacturing, such as deformed alloys such as GH4169 and GH3536, although they can be formed, these alloys have low high-temperature strength and are not suitable for components that require high-temperature mechanical properties; However, cast superalloys such as K465, K438, and K417 with high high-temperature performance are prone to cracks and other defects during the additive manufacturing process, and the formability is extremely poor.

Method used

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  • A kind of nickel base superalloy and design method thereof
  • A kind of nickel base superalloy and design method thereof
  • A kind of nickel base superalloy and design method thereof

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Embodiment 1

[0051] This embodiment designs a nickel-based superalloy for additive manufacturing, which mainly includes the following steps:

[0052] 1) Preliminary selection of alloy composition

[0053] According to the design principle of traditional superalloy composition, the composition of solid solution elements and grain boundary strengthening elements in a nickel-based superalloy is generally determined, specifically Ni-8Cr-5Co-2Mo-5W-0.05C (for the nickel-based superalloy , including Cr(8wt%), Co(5wt%), Mo(2wt%), W(5wt%), C(0.05wt%), Al(0~7wt%), Ti(0~5wt%), Ni (margin)).

[0054] Then, adjust the γ′-Ni in the nickel-based superalloy 3 Contents of Al second phase forming elements Al and Ti (the adjustment range of Al is 0 to 7 wt %, and the adjustment range of Ti is 0 to 5 wt %). Using Thermo-Calc thermodynamic calculation software to calculate the effect of Al and Ti content on γ′-Ni in alloy 3 The influence of Al second phase content (see Table 1 for details). The electron ...

Embodiment 2

[0071] This embodiment designs a nickel-based superalloy for additive manufacturing, which mainly includes the following steps:

[0072] 1) Preliminary selection of alloy composition

[0073] According to the design principle of traditional superalloy composition, the composition of solid solution elements and grain boundary strengthening elements in a superalloy is generally determined, specifically Ni-10Cr-10Co-3Mo-2W-0.5Hf-0.05C (for the nickel-based high temperature Alloys, including Cr(10wt%), Co(10wt%), Mo(3wt%), W(2wt%), Hf(0.5wt%), C(0.05wt%), Al(0~7wt%), Ti (0 to 5 wt %), Ni (remainder)).

[0074] Then, the γ′-Ni in the nickel-based superalloy is adjusted 3 Contents of Al second phase forming elements Al and Ti (the adjustment range of Al is 0 to 7 wt %, and the adjustment range of Ti is 0 to 5 wt %). γ′-Ni in alloys with different Al and Ti contents was calculated by Thermo-Calc thermodynamic calculation software 3 Al second phase content (adjustment of the conte...

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Abstract

The invention relates to a nickel-based superalloy and a design method thereof, and relates to the technical fields of alloy design and additive manufacturing. The main technical solution is as follows: a nickel-based superalloy is prepared by an additive manufacturing process, and the nickel-based superalloy is used to promote γ′-Ni 3 The content of the alloying elements precipitated in the second phase of Al satisfies: make the γ′-Ni in the nickel-based superalloy 3 The volume fraction of the Al second phase is 45-60%, and the content of Ti element in the nickel-based superalloy is 0-4wt%; 3 The alloying elements precipitated in the second Al phase include Al elements, preferably Ti and / or Ta elements. In the present invention, the γ′-Ni in the nickel-based superalloy 3 Al second phase content is used as a key parameter to balance high temperature mechanical properties and additive manufacturing formability, and it is proposed that γ′‑Ni 3 The content of Al phase is controlled in the range of 45-60%, so as to take into account the mechanical properties and formability of the nickel-based superalloy. The invention can provide guiding ideas for the research and development of high-performance nickel-based superalloys for additive manufacturing.

Description

technical field [0001] The invention relates to the technical field of alloy design and additive manufacturing, in particular to a nickel-based superalloy and a design method thereof. Background technique [0002] Nickel-based superalloys have excellent physical and mechanical properties, and can work reliably for a long time in high temperature and complex stress environments. They are widely used in the manufacture of hot-end components for aviation, aerospace, and ship engines. [0003] At present, the preparation technology of nickel-based superalloy components mainly includes investment casting technology, powder metallurgy technology and deformation technology. In order to adapt to different preparation technologies, researchers have developed different kinds of alloy materials, such as cast alloys such as K465, K438, and K417, powder alloys such as FGH95, FGH96, and FGH97, and deformed alloys such as GH4169, GH3536, and GH3230. The above-mentioned different kinds of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C19/05B22F1/00B22F10/28B33Y70/00
CPCB22F1/0003C22C19/056C22C19/057B33Y70/00
Inventor 梁静静周亦胄李金国孙晓峰
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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