Large circular forgings for jet-engines have been produced by press or hammer involving many heatings. However, such production equipment is usually required to have a forging capacity above 10,000 tf, and the products qualities and material yields leave room for improvement. In order to solve the above problems, a rotary forging process was introduced into the working of Ti alloy materials. Prior to actual trial production, on model tests (1/8.8 scale) the design of the process and profiles were carried out using lead and Ti-6 Al-4 V. According to a 10 inclining upper die of an actual press, temperature drop of the material surface in contact with the rotary dies decreased, and actual cup-shape engine disks (715 x 280 h) were successfully formed without cracks, underfilling or other problems. These samples had thin alpha-casings (nearly 0.15 mm) and high material yields (nearly 70 %), and showed as good and homogeneous mechanical properties as those produced by the conventional forging process.


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    Title :

    Rotary forging of Ti alloy products for airplane engine


    Additional title:

    Drehschmieden von Ti-Legierungsprodukten fuer Flugzeugmotor
    Titel japanisch


    Contributors:
    Nishiguchi, M. (author) / Fukuyasu, T. (author) / Hayamizu, Y. (author) / Satou, Y. (author)

    Published in:

    Publication date :

    1989


    Size :

    10 Seiten



    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    Japanese




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