Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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The Influence of Annealing Temperature on Mechanical Properties and Friction Coefficient of Coating Layer in Galvannealed Sheet Steel

용융아연도금강판에서 어닐링 온도변화에 따른 화합물화가 도금층 기계적 특성 및 마찰계수에 미치는 영향

  • 전성진 (부산대학교 정밀기계공학과) ;
  • 이정민 (부산대학교 정밀기계공학과) ;
  • 김동환 (진주국제대학교 자동차공학부) ;
  • 김동진 (POSCO 자동차강재 가공연구센터) ;
  • 강연식 (POSCO 자동차강재 가공연구센터) ;
  • 김병민 (부산대학교 정밀기계공학과)
  • Published : 2005.11.01
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Abstract

In the modern days, a galvannealed sheet steel (GA) instead of a cold rolled steel sheet has been widely used as an alternative to extend the life of automotive body. Accordingly, the mechanical properties of GA for automobiles were taken into account and studied by examining their variation with annealing temperature. To clarify the effect of surface features on the mechanical and frictional properties of GA, the several tests such as nanoindentation, Vickers hardness and nano scratch test were executed. The frictional characteristics of coating layers of GA were examined through nano scratch test in this study. The friction coefficient of coating layers on the surface was obtained from the nano scratch. The variation of friction coefficient versus velocity and pressure was taken into consideration in this paper. Hardness and elastic modulus of coating layer were increased as increasing annealing temperature.

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References

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