Centrifugal precision cast TiAl turbocharger wheel using ceramic mold
✍ Scribed by Wang Shouren; Guo Peiquan; Yang Liying
- Publisher
- Elsevier Science
- Year
- 2008
- Tongue
- English
- Weight
- 790 KB
- Volume
- 204
- Category
- Article
- ISSN
- 0924-0136
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✦ Synopsis
It is the potential candidate for gamma TiAl-based alloys that would replace Ni-based superalloys, which are being used in fabrication of the turbocharger wheel currently. Cast Ti-47Al-2Cr-2Nb alloys due to their specific performance requirement are now on the verge of a commercial application. A novel precision casting technique, which combines the ceramic mold casting with centrifugal casting, was described in this work. Multiple-section ceramic mold was designed and fabricated successfully. All the mold sections fit together to form a cavity and then open in many directions to eject the molded part. Microstructures and mechanical properties of cast Ti-47Al-2Cr-2Nb alloys under the action of centrifugal force are discussed.