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백운봉(U. B. Baek),박종서(J. S. Park),박휘립(H. R. Park),김동진(D. J. Kim),최병호(B. H. Choi) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.11
Gear is the one of most widely used device for transmitting power. In the design of gear ensuring reliability, bending strength of tooth root, pitting resistance of contact surface, and scoring strength are considered to determine transmitting power of gear. In 1892, W. Lewis designed tooth of gear by simplifying it as cantilever beam to calculate bending strength of gear tooth. But the bending strength is the fatigue phenomenon related to crack initiation in tooth root. This paper presents high cycle fatigue properties of carburized SCM420H steel which is widely used as the material for gear and failure analysis of gear are also performed.