Aero Engine Threaded Fastening Solution: High-Temperature Alloy Insert Case Study
Published2026-08-09
Application of Inconel X-750 inserts in turbofan engine combustion chamber mounting bosses, covering design requirements, installation process, and quality verification.
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Project Background
A turbofan engine combustion chamber mounting boss experienced thread wear and loosening under 550°C continuous temperature and vibration. Inconel X-750 inserts were selected for thread reinforcement.
Technical Requirements
- Operating temp: 550°C continuous, 600°C peak
- Vibration: Random 10g RMS, 20-2000Hz
- Fatigue life: ≥10^6 thermal cycles
- Thread spec: M10×1.5-2D
Quality Verification Results
High-temp tensile: 1180MPa (req ≥1000MPa), Vibration fatigue: 1.5×10^6 cycles, Thermal cycling: 1200 cycles. All tests passed AS9100D requirements.