A notch-insensitive GH4141 high-temperature alloy forged bar and a preparation method thereof
By employing a process involving two homogenization heat treatments, multiple rapid forgings, and subsequent forging, the carbide distribution of GH4141 high-temperature alloy forging bars was controlled, solving the problems of low high-temperature creep performance and notch sensitivity. This resulted in notch-free material properties at high temperatures, meeting the high-end equipment requirements of aero-engines.
Patent Information
- Application Number
- CN202610484101.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2026-04-14
- Publication Date
- 2026-08-11
- Estimated Expiration
- 2046-04-14
AI Technical Summary
The existing GH4141 high-temperature alloy has low high-temperature creep performance and notch sensitivity, making it difficult to meet the material reliability and consistency requirements of aero-engines.
By employing a process involving two homogenization heat treatments, multiple rapid forgings, and subsequent forging, the types and distribution characteristics of carbide precipitation are controlled. Through a multi-directional forging method with large deformation, M6C carbide is ensured to precipitate along grain boundaries, while M23C6 carbide is minimized from precipitation. Combined with solution treatment and aging treatment, the microstructure is optimized.
The high-temperature notch creep rupture performance of GH4141 high-temperature alloy forged bars was significantly improved. The fracture location was located in the smooth section. The high-temperature notch creep rupture time of the material under the conditions of 732℃/603MPa was ≥40h, eliminating notch sensitivity and improving the strength and plasticity of the material.