열처리공학회지 (Journal of the Korean Society for Heat Treatment)

  • 제14권3호
  • /
  • Pages.155-159
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  • 2001
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  • 1225-1070(pISSN)
  • /
  • 2508-4046(eISSN)
한국열처리공학회 (The Korean Society for Heat Treatment)
권호 표지

열간단조 금형강의 열충격특성연구

Analysis of Thermal Shock in Tool Steels for Hot Forging

  • 김정운 (부산대학교 정밀정형 및 금형가공 연구센터) ;
  • 김봉준 (부산대학교 정밀정형 및 금형가공 연구센터) ;
  • 조이석 (부산대학교 정밀정형 및 금형가공 연구센터) ;
  • 문영훈 (부산대학교 정밀기계공학과)
  • Kim, J.W. (Engineering Research Center for Net Shape and Die Manufacturing, Pusan National University) ;
  • Kim, B.J. (Engineering Research Center for Net Shape and Die Manufacturing, Pusan National University) ;
  • Jo, I.S. (Engineering Research Center for Net Shape and Die Manufacturing, Pusan National University) ;
  • Moon, Y.H. (Dept. of Mechanical and Precision Engineering, Pusan National University)
  • 투고 : 2001.05.28
  • 발행 : 2001.05.31
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초록

The thermal shock resistance has been investigated and compared in three hot-work tool steels. The resistance to thermal shock is first of all a matter of good toughness and ductility. Therefore, a proper hot-work tool steel should be characterized by high fracture strength and high temperature toughness. In this study, new test method is proposed to measure the thermal shock resistance. New method is basically based on Uddeholm' thermal shock test but some modification has been properly applied. Based on these results, some critical temperature($T_{fractures}$) at which fracture occur can be measured to characterize the thermal resistance of the materials. The specific values of ${\Delta}T$, the temperature difference between holding temperature and $T_{fractures}$, has been successfully used as a measure of the thermal shock resistance in this study, the results showed that the thermal shock method used in this study was properly modified.

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