Journal of the Korean Society for Heat Treatment (열처리공학회지)

The Korean Society for Heat Treatment (한국열처리공학회)
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Comparative Study on Microstructures of Hot-rolled STS 304L/A516-70N and STS 316L/A516-70N Clad Plates

열간압연으로 제조된 STS 304L/A516-70N과 STS 316L/A516-70N 클래드재들의 미세조직에 대한 비교 연구

  • Jin, Ju-Chan (Department of Materials Science and Engineering, Yonsei University) ;
  • Cho, Soochul (Special Steel Business Team, Dongkuk Steel) ;
  • Sim, Hoseop (Special Steel Business Team, Dongkuk Steel) ;
  • Lee, Young-Kook (Department of Materials Science and Engineering, Yonsei University)
  • 진주찬 (연세대학교 신소재공학과) ;
  • 조수철 (동국제강 특수강사업팀) ;
  • 심호섭 (동국제강 특수강사업팀) ;
  • 이영국 (연세대학교 신소재공학과)
  • Received : 2021.06.22
  • Accepted : 2021.07.06
  • Published : 2021.07.30
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Abstract

In the present study, we comparatively investigated the microstructures of two hot-rolled stainless steel clad plates; STS 304L - low carbon steel A516-70N and STS 316L - A516-70N. The STS 304L/A516-70N clad plate (Clad_304L_Ni) had a Ni-interlayer between stainless steel and carbon steel and a 90 ㎛ thick deformation band of unrecrystallized austenite grains on the stainless steel. The STS 316L/A516-70N clad plate (Clad_316L) had no interlayer and almost fully recrystallized austenite grains. Clad_304L_Ni exhibited the thinner a decarburized layer in carbon steel and a total carburized layer in stainless steel than Clad_316L. However, a severely carburized layer in stainless steel was thicker for Clad_304L_Ni than Clad_316L. Hardness profiles near the interface of clad plates matched well with microstructures at locations where the hardness values were measured.

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Acknowledgement

이 연구는 2020 년도 산업통상자원부 및 산업기술평가관리원(KIET) 연구비 지원에 의한 연구임(20010701).

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