Journal of Welding and Joining

The Korean Welding and Joining Society (대한용접접합학회)
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VHCF Characteristics of SCMH2 Steel Depending on the Surface Treatment Conditions

SCMH2 고속회전축재의 표면처리조건에 따른 VHCF 피로특성에 관한 연구

  • Suh, C.M. (School of Mechanical Engineering, Kyungpook National University) ;
  • Suh, C.H. (Daegu Mechatronics & Materials Institute) ;
  • Suh, M.S. (Korea Institute of Energy Research)
  • Received : 2013.06.23
  • Accepted : 2013.08.26
  • Published : 2013.08.31
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Abstract

SCMH2 steel is widely used in the industrial members of car and tractor. This study focused on material properties and evaluation technology of the SCMH2 steel regarding the surface treatment followed by carburizing and nitriding, by means of impact test, hardness test. and fatigue test including HCF (high cycle fatigue) and VHCF (very high cycle fatigue). Drop weight impact tester (Instron, 9250 Hv) and Cantilever type rotating-bending fatigue tester (YRB200, 3150 rpm) were used to characterize the SCMH2 standard specimen before and after carburizing/nitriding. In order to understand those effects on fatigue characteristics and material properties, the fractured surfaces were carefully observed and analyzed by SEM (scanning electron microscope) and EDS (energy-dispersive X-ray spectroscopy).

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References

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