Journal of the Korean Society of Industry Convergence (한국산업융합학회 논문집)

The Korean Society of Industry Convergence (한국산업융합학회)
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Reliability Evaluation of Hardness and Impact Absorption Energy of Tempered Structure Steel SCM435

뜨임한 구조용강 SCM435의 경도 및 충격 흡수에너지에 대한 신뢰성 평가

  • Yun, Seo-Hyun (Interdisciplinary Program of Marine Convergence Design, Pukyong National University) ;
  • Gu, Se-Hun (Dept. of Materials Science and Engineering, Pukyong National University) ;
  • Nam, Ki-Woo (Dept. of Materials Science and Engineering, Pukyong National University)
  • 윤서현 (부경대학교 마린융합디자인협동) ;
  • 구세훈 (부경대학교 재료공학과) ;
  • 남기우 (부경대학교 재료공학과)
  • Received : 2019.10.18
  • Accepted : 2019.12.05
  • Published : 2019.12.31
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Abstract

SM45C steel, which is widely used for mechanical structure, was carburized at 870℃ for 4 hours and tempered at 300℃ and 400℃ for 1, 3 and 6 hours. The tempered materials were evaluated for tensile test, hardness test and impact test. In particular, the hardness and the absorption energy were evaluate the reliability by the Weibull statistical analysis. 300℃-1h specimen is considered to be the best heat treatment condition in the tensile stress and the observation of fracture surface. 300℃-1h specimen showed larger shape and scale parameter than the other specimens, and Rockwell hardness variance was small and showed the best characteristics. 400℃-3h specimen showed larger shape and scale parameter than the other specimens, the dispersion of impact absorption energy is small, and showed excellent characteristics.

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References

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