A powder fed, microprocessor controlled plasma transferred arc (PTA) hard facing technique is described for facing valve seats. A comparison of this technique is made with the conventional oxy-acetylene flame welding process to show the differences in the metallurgical characteristics of the respective products. The merits of the PTA process are associated with a) its precision controllable heat source and lower energy consumption b) finer microstructure and narrower heat affected zone, c) its versatility for powders of different raw materials, d) higher volume production capability, and e) minimum raw material waste; however, it does not replace the flame welding process completely. The relative choice between the two processes will depend on investment costs, volume of production and metallurgical quality requirements of the final product. The present trend of increasing costs and shortages of strategic hard facing materials and needs for more hard faced valves for future engines make the PTA technique attractive for new demands in the automotive industry.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    A Powder Fed Plasma Transferred Arc Process for Hard Facing Internal Combustion Engine Valve Seats


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Milligan, J. (Autor:in) / Narasimhan, S. (Autor:in)

    Kongress:

    1980 Automotive Engineering Congress and Exposition ; 1980



    Erscheinungsdatum :

    01.02.1980




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    A powder fed plasma transferred arc process for hard facing internal combustion engine valve seats

    Milligan,J. / Narasimhan,S. / Eaton,Engine Components,Battle Creek,US | Kraftfahrwesen | 1980


    Rearward- and forward-facing seats

    De Haven, H. | Engineering Index Backfile | 1953


    Side-facing belted aircraft seats

    CORR{TILDE OVER (E)}A LUIS GUSTAVO D'ANDREA DEMÉTRIO / DE MELLO MATOS VIVIANE CAVALCANTE / GHARIA BEENAL et al. | Europäisches Patentamt | 2019

    Freier Zugriff

    SIDE-FACING BELTED AIRCRAFT SEATS

    DEMÈTRIO CORRÊA LUIS GUSTAVO D`ANDREA / DE MELLO MATOS VIVIANE CAVALCANTE / GHARIA BEENAL et al. | Europäisches Patentamt | 2018

    Freier Zugriff

    FACING SEATS-TYPE AUTOMATED DRIVING VEHICLE

    TAKAHASHI ARATO | Europäisches Patentamt | 2020

    Freier Zugriff