Nickel-based superalloy materials and preparation methods for laser powder bed melting processes
By adjusting the elemental ratio and preparation process of nickel-based superalloys, a crack-free γ' phase-strengthened nickel-based superalloy was successfully prepared, solving the cracking problem in the laser powder bed melting process, improving the high-temperature mechanical properties of the alloy, and expanding its application in the aerospace field.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHANDONG UNIV
- Filing Date
- 2024-01-12
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies make it difficult to prepare crack-free γ' phase-strengthened nickel-based superalloys in laser powder bed melting processes, and traditional methods may lead to powder contamination and a decline in mechanical properties.
By adjusting the elemental composition of nickel-based superalloys, increasing the content of solid solution strengthening elements Cr, Co, W, and Mo, and optimizing the content of C, B, Zr, and Hf, nickel-based alloy powders were prepared using vacuum atomization, and the alloy was formed using laser powder bed melting process. The scanning strategy was optimized to suppress crack formation.
A crack-free forming nickel-based superalloy was achieved, with a room temperature tensile strength of 1100–1300 MPa, an elongation after fracture of over 12%, and a tensile strength increase of over 55% at 900℃ after heat treatment, meeting the performance requirements of the aerospace field.
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Figure CN117604329B_ABST