Seed crystal alloy for the preparation of nickel-based single crystal blades

A nickel-based single crystal and seed crystal technology, applied in crystal growth, chemical instruments and methods, post-processing devices, etc., can solve problems affecting nickel-based single crystal blades, etc.

Active Publication Date: 2021-10-08
成都航宇超合金技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The reason for this situation is that the selected seed crystal alloy contains Al, Ti, Cr and other easily oxidizable elements. During the heating process of the directional solidification furnace, an oxide layer is easily formed on the surface of the seed crystal alloy, which prevents the The transition section replicates the orientation of the seed crystal alloy, thereby preventing the nickel-based single crystal blade from replicating the orientation of the seed crystal alloy, which affects the preparation of the nickel-based single crystal blade

Method used

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  • Seed crystal alloy for the preparation of nickel-based single crystal blades
  • Seed crystal alloy for the preparation of nickel-based single crystal blades
  • Seed crystal alloy for the preparation of nickel-based single crystal blades

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Embodiment

[0017] The nickel-based single crystal blade of DD32 is prepared by the seed crystal alloy of the present invention, and the DD32 nickel-based single crystal blade master alloy composition (by mass percentage) is as shown in Table 1:

[0018] Grade Ni Co(%) W(％) Mo(%) Al(％) Ta(%) Nb(%) Cr(％) Re(%) C(％) DD32 Bal 8-10 7.7-9.5 0.8-1.4 5.6-6.3 3.5-4.5 1.4-1.8 4.3-5.6 3.5-4.5 0.12-0.18

[0019] Table I

[0020] The composition of the seed crystal alloy 5 used (in terms of mass percentage, the impurity content is less, which is neglected here) is as shown in Table 2;

[0021]

[0022] Table II

[0023] Such as figure 1 As shown, the seed crystal alloy 5 with a size of φ11mmx25mm is first loaded into the single crystal casting cavity 1, and then the single crystal casting cavity with the seed crystal alloy 5 is sent into the directional solidification furnace for nickel-based single crystal Preparation of the blade. During the prep...

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Abstract

The invention discloses the technical field of preparation of single crystal blades, in particular to a seed crystal alloy used for the preparation of nickel-based single crystal blades, which is prepared from the following raw materials in terms of mass percentage: Co: 5-25 %, Mo: 2‑10%, Ta: 5‑20%, W: 1‑10%, Ni≥50%, and the rest are unavoidable impurities; the seed crystal alloy does not include Al, Ti, Cr and other easily oxidizable elements , can effectively prevent the oxidation of the seed crystal surface during the preparation of nickel-based single crystal blades, and reduce the possibility of failure of nickel-based single crystal blades to replicate the seed crystal orientation due to oxidation of the seed crystal surface; according to the prepared nickel-based single crystal blades The composition of the master alloy, by adjusting the melting point of the seed crystal alloy through Ta, Co, and Mo elements, can obtain a seed crystal alloy suitable for the preparation of nickel-based single crystal blades with different master alloy compositions, which significantly improves the scope of application of the seed crystal alloy .

Description

technical field [0001] The invention relates to the technical field of single crystal blade preparation, in particular to a seed crystal alloy used for preparing nickel-based single crystal blades. Background technique [0002] Nickel-based single crystal blades can usually be prepared by crystal selection method and seed crystal method. The crystal selection method is widely used in industrial production, but there is a risk of crystal selection failure in the crystal selection method, and it is difficult to accurately control the three-dimensional orientation of the nickel-based single crystal blade. However, if the seed crystal method is properly controlled, in theory, the nickel-based single crystal blade can completely replicate the orientation of the seed crystal, and can precisely control the three-dimensional orientation of the nickel-based single crystal blade to form a complete single crystal. Therefore, the nickel-based single crystal blade manufacturer Most of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C19/05C22C1/03C30B35/00
CPCC22C1/023C22C1/03C22C19/051C30B35/007
Inventor 宋扬王远斌肖锡铭张凡王勇
Owner 成都航宇超合金技术有限公司
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