Journal of the Korean Society for Heat Treatment (열처리공학회지)

The Korean Society for Heat Treatment (한국열처리공학회)
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Analysis of Cracking Phenomenon Occurring During Hot Rolling of Fe-23Mn High-manganese Steels with Different Aluminium and Carbon Contents

알루미늄과 탄소 함량에 따른 Fe-23Mn계 고망간강의 열간 압연 시 발생하는 균열 현상 분석

  • Lim, Hyeon-Seok (Department of Materials Science and Engineering, Seoul National University of Science and Technology) ;
  • Lee, Seung-Wan (Department of Materials Science and Engineering, Seoul National University of Science and Technology) ;
  • Hwang, Byoungchul (Department of Materials Science and Engineering, Seoul National University of Science and Technology)
  • 임현석 (서울과학기술대학교 신소재공학과) ;
  • 이승완 (서울과학기술대학교 신소재공학과) ;
  • 황병철 (서울과학기술대학교 신소재공학과)
  • Received : 2016.05.23
  • Accepted : 2016.07.03
  • Published : 2016.07.30
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Abstract

In this study, a microstructural investigation was conducted on the cracking phenonmenon occurring during hot rolling of Fe-23Mn high-manganese steels with different aluminium and carbon contents. Particular emphasis was placed on the phase stability of austenite and ferrite dependent on the chemical composition. An increase in the aluminum content promoted the formation of ferrite band structures which were easily deformed or cracked. In the steels containing high carbon contents of 0.4 wt.% or higher, on the other hand, the volume fraction and thickness of ferrite bands decreased and thus the cracking frequency was significantly reduced. Based on these findings, it is said that the microstructural evolution occurring during hot rolling of high-manganese steels with different aluminium and carbon contents plays an important role in the cracking phenomenon. To prevent the cracking, therefore, the formation of second phases such as ferrite should be minimized during the hot rolling by the appropriate control of the chemical composition and process parameters

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References

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