Nickel-based wrought superalloy and preparation method thereof

By controlling the content of key elements and adding Hf elements, and combining with heat treatment technology, the γ′ phase is increased from the nanoscale to the micron level, which solves the problem that nickel-based deformation high-temperature alloys are difficult to meet the service performance and thermal deformation capabilities at the same time, achieving high temperature strength, durability and rapid blanking effects.

CN120041708AActive Publication Date: 2025-05-27INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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Patent Information

Application Number
CN202510210984.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-02-25
Publication Date
2025-05-27
Estimated Expiration
2045-02-25

AI Technical Summary

Technical Problem

The existing nickel-based deformation high-temperature alloys are difficult to meet the problems of service performance and thermal deformation capabilities at the same time.

Method used

By controlling the content of key elements in the alloy, such as the sum of weight percentages of Al, Ti and Nb, and the ratio of Ti and Al is 0.2-1, the precipitation strengthening and solid solution strengthening of the alloy are improved. At the same time, by adding Hf elements and heat treatment processes, the γ′ phase is increased from the nanoscale to the microscale, promoting dynamic recrystallization and refinement of grains.

Benefits of technology

The high-temperature strength and durable properties of the alloy are achieved, which reduces deformation resistance, ensures that the alloy can be opened quickly without cracking, and improves production efficiency and tissue uniformity.

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Abstract

The invention relates to a nickel-based wrought superalloy and a preparation method thereof, and relates to the technical field of wrought superalloy, and the nickel-based wrought superalloy comprises the following chemical components by weight: 0.01-1 wt% of C, 0.01-1 wt% of S, 0.01-1 wt% of Ni, 0.01-1 wt% of Ni, 0.01-1 wt% of Ni, 1 to 8 wt% of Al; 5 to 25 wt% of Co; 1 to 5 wt% of W; 8 to 18 wt% of Cr; 1 to 8 wt% of Mo; 1 to 5 wt% of Nb; 1 to 3 wt% of Ti; v: 0.1 to 1 wt%; hf: 0.1 to 2 wt%; and the balance of Ni. The sum of the weight percentages of precipitation strengthening elements Al, Ti and Nb of the alloy is greater than or equal to 7wt%; the weight percentage ratio of the element Ti to the element Al is 0.2-1, the high-temperature strength and durability of the alloy are ensured, meanwhile, by adding a certain amount of the element Hf into the alloy, the size and shape of the gamma'phase are improved, the hot working plasticity of the alloy is facilitated, and the problem that an existing nickel-based wrought superalloy is difficult to meet the service performance and the thermal deformation capacity at the same time is solved.
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