Turbine engine casing fabrication and heat treatment
Patent Information
- Authority / Receiving Office
- EP · EP
- Patent Type
- Applications
- Current Assignee / Owner
- GKN AEROSPACE SWEDEN AB
- Filing Date
- 2024-09-04
- Publication Date
- 2026-06-24
AI Technical Summary
The high cost and challenges of manufacturing low pressure turbine (LPT) casings using expensive materials like Waspaloy, which is prone to Strain Age Cracking and has a narrow forgability window, making it difficult to produce large crack-free parts sustainably.
A method of heat treatment for a Ni-Cr-Co-Mo-Al-Ti alloy, specifically heating the component to temperatures between 920°C to 1120°C for less than 0.75 hours, followed by carbide stabilisation at 825°C to 843°C for about 4 hours, to optimize tensile strength, modulus of toughness, low-cycle fatigue, and creep properties, while reducing manufacturing costs.
The method achieves improved mechanical properties, including a significant increase in containment factor, while reducing manufacturing costs by using a more cost-effective alloy, thus providing a viable alternative to expensive materials like Waspaloy.
Smart Images
Figure EP2024074676_27032025_PF_FP_ABST