VHCF Characteristics of SCMH2 Steel Depending on the Surface Treatment Conditions

Suh, C.M.; Suh, C.H.; Suh, M.S.

doi:2013.31.4.47

J Weld Join > Volume 31(4); 2013 > Article

Research Paper

Journal of KWJS 2013;31(4):47-53.
DOI: https://doi.org/10.5781/KWJS.2013.31.4.47 Published online August 31, 2013.

VHCF Characteristics of SCMH2 Steel Depending on the Surface Treatment Conditions

C.M. Suh¹, C.H. Suh², M.S. Suh³

Correspondence: M.S. Suh,
Email: mssuh@kier.re.kr

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).

Key Words: SCMH2, VHCF(Very High Cycle Fatigue), Impact, Carburizing, Nitriding