Korean Journal of Metals and Materials (대한금속재료학회지)

The Korean Institute of Metals and Materials (대한금속재료학회)
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The Effect of Mo and Cr addition on the Deep Drawability of Dual Phase Steel Sheets

이상조직강판의 성형특성에 미치는 Mo와 Cr첨가의 영향

  • Han, Seong Ho (Automotive Steel Products Research Group, Technical Research Laboratories. POSCO) ;
  • Ahn, Yeon Sang (Automotive Steel Products Research Group, Technical Research Laboratories. POSCO) ;
  • Chin, Kwang Geun (Automotive Steel Products Research Group, Technical Research Laboratories. POSCO) ;
  • Kim, In Bae (School of Materials Science and Engineering, Pusan National University)
  • 한성호 (포스코기술연구소 자동차소재연구그룹) ;
  • 안연상 (포스코기술연구소 자동차소재연구그룹) ;
  • 진광근 (포스코기술연구소 자동차소재연구그룹) ;
  • 김인배 (부산대학교 재료공학부)
  • Received : 2008.07.08
  • Published : 2008.11.25
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Abstract

The need to lower the weights of automotive vehicle and to improve the safety of cars has resulted in the development of high strength steels such as TRIP(Transformation Induced Plasticity) and DP (Dual Phase) steel. It is well known that the higher strength of steel shows the poorer press formability. Among the high strength steels, DP steel shows several good characteristics such as low yield ratio, high initial n value, high elongation, high bake hardenability and anti-aging property. However, there's a certain limit in application of DP steels to the automotive panel parts because their poor deep drawbility caused by martensite. In this study, the effect of alloying elements on the deep drawability and recrystallization texture in TS 440MPa grade DP steel with 0.015~0.02% carbon has been investigated on the base of SEM, TEM, XRD and EBSD analysis.

Keywords

References

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