Journal of the Korean Society for Heat Treatment (열처리공학회지)

The Korean Society for Heat Treatment (한국열처리공학회)
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High Temperature Oxidation Behavior and Surface Defect in Fe-25Mn-1.5Al-0.5C Steel

Fe-25Mn-1.5Al-0.5C강의 고온 산화 거동과 표면 결함

  • 박신화 (포항산업과학연구원) ;
  • 홍순택 (포항제철(주) 기술연구소) ;
  • 김태웅 (포항제철(주) 기술연구소) ;
  • 정인상 (경북대학교 공과대학 금속공학과)
  • Received : 2000.03.22
  • Published : 2000.05.30
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Abstract

The high temperature oxidation behavior and the surface defect in Fe-25Mn-1.5A1-0.5C steel was investigated by XRD (X-ray Diffractin) and electron microscopy. The intra- and inter-granular oxides were formed by the selective oxidation of manganese and aluminum, which were identified to MnAl2O4 phase. Aluminum nitride (AlN) was formed in front of these oxides. The ${\gamma}$-matrix was transformed to ${\alpha}$- and ${\varepsilon}$- phases by the selective oxidation of manganese. The surface defect, micro-scab was induced by the difference of the high temperature ductility between the matrix and the inter-granular oxide.

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