The Effects of the Tempering Temperatures on the Mechanical Properties of the Carbon Tool Steel(SK5M) for Flat Spring

박판 스프링용 탄소공구강대(SK5M)의 기계적 성질에 미치는 뜨임 온도의 영향

  • Won S.T. (Die & Mould Design. Dept., SNUT) ;
  • Sim K.S. (Die & Mould Design. Dept., SNUT) ;
  • Lim C.R. (Daewon Kang Up Co., Ltd.)
  • Published : 2006.05.01

Abstract

This study examined the effects of the tempering temperatures($360-420^{\circ}C$) on the mechanical properties of the carbon tool steel (SK4M) for flat spring. Hardness test, tensile test and fatigue test were performed at room temperature($20^{\circ}C$). The tensile strength and yield strength of $390^{\circ}C\;and\;420^{\circ}C$ tempered SK5M were 0.93-0.97 times and 0.81-0.87 times those of $360^{\circ}C$ tempered SK5M, respectively. The fatigue limit of $360-420^{\circ}C$ tempered SK5M were 35-40% of tensile strength of $360-420^{\circ}C$ tempered SK5M, respectively.

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