The bake hardening effect depends on three parameters i.e. pre-straining, paint baking temperature and paint baking time. The combined effect of all these parameters results into the increase in yield strength, called the “baking effect”. This paper explains the individual effects of these parameters on the baking value. Tensile test were carried out for the 495 samples baked at baking temperature from 140°C to 250°C with differential baking time of 10, 15, 20, 25 and 30 minutes and differential pre-straining of 2%, 3% and 5%. The differences of yield strength between the unbaked and baked sample were calculated and the increase in yield strength was noted. After these laboratory trials 800 numbers of door outer panels of a small truck were formed and finish painted. The increment in yield strength after component forming and painting was determined by taking tensile samples from three different locations of 5 painted doors. This would help shop floor optimization of the process parameters and the compatibility with various painting process vis a vis increase in bake hardening strength. It is also leading to a future work to understand clearly the correlation between the baking temperature, increase in strength and the micro structural changes.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Bake Hardening Steel (BH220) Characterization


    Additional title:

    Sae Technical Papers


    Contributors:
    Galgali, B. R. (author) / Ogale, M. M. (author) / Ghosal, S. (author) / Joshi, S. P. (author)

    Conference:

    Commercial Vehicle Engineering Congress & Exhibition ; 2008



    Publication date :

    2008-10-07




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Bake Hardening Steel (BH220) Characterization

    Ghosal, S. / Galgali, B.R. / Ogale, M.M. et al. | British Library Conference Proceedings | 2008



    Effect of prestrain on ambient aging and bake hardening of bake hardening steel for automotive outer body panels

    Jeong,W.C. / POSCO Technical Research Lab,KR | Automotive engineering | 1996


    A mechanism of paint bake-hardening

    Okamoto, A. / Takeuchi, K. / Takagi, M. | Tema Archive | 1989


    Properties of weld joints of bake-hardening steel for automobile

    Katayama, T. / Matsui, F. / Yoshida, N. et al. | Tema Archive | 2004