Centrifugal casting has been used to cast TiAl car valves. The casting has been carried out in vacuum using induction melting furnace coupled to a CaO crucible, which offers a maximum superheat of approximately 180 degree C and much improved filling over normal cold wall induction furnace. In this work, the effects of the casting conditions, including superheat, rotation speed at one mould temperature have been investigated in terms of the product integrity and porosity and the microstructure of the valves. The mechanical properties and oxygen contents of cast stems with various degrees of superheat have been measured at room temperature. The as-cast car valves and some HIPped car valves have been successfully engine-tested. The feasibility for mass production of TiAl car valves and realistic costing for producing car valves using centrifugal casting and CaO crucible are currently also being assessed.


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    Titel :

    Single step centrifugal casting TiAl automotive valves


    Weitere Titelangaben:

    Schleudergießen von TiAl-Fahrzeugventilen


    Beteiligte:
    Liu, K. (Autor:in) / Ma, Y.C. (Autor:in) / Gao, M. (Autor:in) / Rao, G.B. (Autor:in) / Li, Y.Y. (Autor:in) / Wei, K. (Autor:in) / Wu, Xinhua (Autor:in) / Loretto, M.H. (Autor:in)

    Erschienen in:

    Intermetallics ; 13 , 9 ; 925-928


    Erscheinungsdatum :

    2005


    Format / Umfang :

    4 Seiten, 8 Quellen




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch




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    Choudhury, A. / Blum, M. / Jarczyk, G. et al. | British Library Conference Proceedings | 1997



    Low Cost Production of TiAl Automotive Valves Using Cold Wall Induction Melting and Permanent Mold Centrifugal Casting

    Choudhury, A. / Blum, M. / Jarczyk, G. et al. | British Library Conference Proceedings | 1997



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