The need to reduce the weight of automobiles has favored the widespread use of aluminum in automotive ventilation and cooling systems. Space, weight restrictions, the need for increased thermal efficiency, and recycling legislation have all contributed to new designs for heat exchangers. In many cases there has been a move to using extruded tube rather than seam-welded tube, leading to a reliance on the relatively more expensive clad fin. A new process, NOCOLOK Sil flux brazing, offers the potential for materials cost savings through the use of'in-situ' filer metal generation. This eliminates the need for using clad brazing materials. It can be applied to a number of alloy systems and product forms. This new technology is firmly rooted in the well established NOCOLOK non-corrosive aluminum brazing flux system. In many applications it can be substituted directly for the conventional non-corrosive flux system; the new process uses the same equipment and brazing cycle, while eliminating the use of clad materials. This new technology has been successfully used for brazing automotive heat exchangers. Fin-to-tube joints can be made in a controlled atmosphere furnace using unclad materials, and tube-to-tube joints can be made without brazing wire preform rings using any suitable heat source. The resulting joint quality is equivalent in every respect to that produced using the conventional non-corrosive flux/braze sheet process.


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    Titel :

    NOCOLOK Sil flux - a novel approach for brazing aluminum


    Weitere Titelangaben:

    NOCOLOK Sil Flux. Eine neue Aluminium-Hartlötmethode


    Beteiligte:
    Baldantoni, A. (Autor:in) / Janeway, B.J. (Autor:in) / Lanzon, D.C. (Autor:in) / Purdon, M.J. (Autor:in) / Timsit, R.S. (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    1994


    Format / Umfang :

    7 Seiten, 10 Bilder, 7 Quellen



    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    NOCOLOK flux and aluminum brazing

    Liu,J. / Thermal Dynamics,US | Kraftfahrwesen | 1996


    NOCOLOK Flux and Aluminum Brazing

    Liu, Johnny | SAE Technical Papers | 1996


    NOCOLOK Flux and Aluminum Brazing

    Liu, J. / Society of Automotive Engineers | British Library Conference Proceedings | 1996


    NOCOLOK[TM] Sil Flux - A Novel Approach for Brazing Aluminum

    Baldantoni, A. / Janeway, B. J. / Lauzon, D. C. et al. | British Library Conference Proceedings | 1994


    Nocolok brazing aluminum heat exchangers

    Liu,J. / Worlitz,T. / Dunham-Bush Fluid Cooling Div.,US | Kraftfahrwesen | 1995