The effects of working mode, coating weight, thickness of substrate and iron content of coating on the peeling-off resistance of zinc and iron-zinc coatings have been investigated using a draw bead tester, which was designed to evaluate the peeling-off phenomena of coated materials. In the test, specimens are subjected to both bending-unbending deformation and the slide caused by the bead tip. The test was conducted under several working modes; i.e., proportion of the deformation to the slide was changed by altering draw bead conditions.The draw bead results showed that Fe-Zn coating were mainly peeled off by the deformation, while Zn coatings were removed chiefly by the slide. It was also revealed that the amount of peeling-off of the coatings was considerably affected by the working mode.The peeling-off resistance of galvannealed steel sheets was then investigated by the test. The results indicated that the amount of peeling-off was a function of coating weight, thickness of substrate and iron content.


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    Title :

    The Peeling-Off Resistance of Zinc and Iron-Zinc Coated Steel Sheets in Stamping


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE International Congress and Exposition ; 1989



    Publication date :

    1989-02-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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