Advanced high strength steel is becoming more ubiquitous in automotive bodies and structures as a method of reducing weight while maintaining crash worthiness. The alloying elements which strengthen AHSS such as Mn, Si, Al, Mo, V, and Nb are of significant levels (up to 24wt% Mn and 6wt% Al for example) to cause concerns when recycling AHSS scrap into new steel. Some of the elements are difficult to remove from the melt and are costly to re-alloy when producing new AHSS steel. Projections from the automotive industry suggest AHSS could account for 64.7% of a vehicle's body and structure by 2020. Such a rise has proven to significantly increase the residual levels of future automotive shred and justifies a need to develop a recycling process that can effectively separate AHSS shred from a scrap stream so that it might be recycled into new AHSS steel. Currently there are no technologies being used to separate AHSS; however, characterization technologies such as x-ray fluorescence and electromagnetic separation could be implemented to accomplish such a task. Without dramatically shifting the automotive recycling industry away from non-discriminate shredding of an end-of-life (EOL) vehicle, the challenges of separation remain the most daunting task in recycling electronics from automobiles. As the proportion of electronics increases as modern cars are recycled, the environmental problems associated with landfilling PCBs such as the heavy metal content will garner more attention, as will the value of the materials currently being discarded. Several existing technologies such as eddy current separation and dense media separation could be altered to isolate electronic components. The developing field of object recognition and separation demonstrates the potential for isolation based on the unique physical properties of PCBs. As the manufacturing of automobiles takes technological steps forward through the increased use of AHSS and electronics, the recycling industry must take steps to move forward as well; to be equipped to address the shift in incoming scrap and the expectations for output quality.


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    Title :

    Importance of advanced high-strength steels and electronic units on the recycling of automobiles: a review


    Additional title:

    Bedeutung hochfester Mehrphasenstähle und elektronischer Bauteile für das Recycling von Kraftfahrzeugen: eine Übersicht


    Contributors:


    Publication date :

    2012


    Size :

    11 Seiten, 7 Bilder, 7 Tabellen, 40 Quellen



    Type of media :

    Conference paper


    Type of material :

    Storage medium


    Language :

    English




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