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Aero Engine Disc Manufacturing Of Titanium Alloy Using Non Isothermal Forging Process
Abstract: Title: Aero-engine Disc Manufacturing of Titanium Alloy Using Non Isothermal Forging Process Abstract Titanium alloy (Ti-6AI-5Zr-0.5Mo-0.25Si) is a near alpha titanium alloy used in high temperature applications, where high creep resistance is required for many Aero-engines. The existing method of manufacturing this part is through isothermal process route which is costly and time consuming and doesn't meet Creep property requirements. Hence present discs manufactured using the available methods are used for restricted life for low power rated aero-engines. Hence, developing an alternate process to meet the higher requirements will enable to use same material with extended life for aero engine part applications. Alternate forging p_rocess (fig. 3) using non-isothermal route has been· established for this material as described in complete specification and the engine parts were successfuily developed and productionised with higher creep properties.
Notices, Deadlines & Correspondence
Patent Information
Applicants
Hindustan Aeronautics Limited
Inventors
1. Mr. M. Anil Kumar
2. Ms. Jayanthi A
Specification
ANNEXURE-I
Title:. Aero-Engine Disc Manufacturing of Titanium Alloy Using Non Isothermal Forging Process
We Claim,
1. Non-isothermal forging process for manufacturing compressor discs in hear alpha titanium alloy
of composition Ti-6AI-5Zr-0.5Mo-0.25Si has been developed as an alternate method to Isothermal
forging process t achieve Creep property of 0.1 %(max) plastic strain at 520"C, 300MPa for 100
hour duration.
2. Non -isothermal forging process involves
Upsetting the billet (3) using top die (1) and bottom die (2) in hydraulic
.,
press in two stages; first stage to be carried out in alpha-beta region
'
and second stage in beta region.
3.Die forging the upset (3) using top profile die (4) and bottom profile die
(5) in hammer in beta region.
4. During oil quenching in heat treatment process, quench delay to be maintained between 15 and 30
second.
Documents
Application Documents
| # | Name | Date |
|---|---|---|
| 1 | 202341067587-Other Patent Document-091023.pdf | 2023-10-19 |
| 2 | 202341067587-Form 5-091023.pdf | 2023-10-19 |
| 3 | 202341067587-Form 2(Title Page)-091023.pdf | 2023-10-19 |
| 4 | 202341067587-Form 1-091023.pdf | 2023-10-19 |