열처리공학회지 (Journal of the Korean Society for Heat Treatment)

  • 제27권4호
  • /
  • Pages.191-201
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  • 2014
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  • 1225-1070(pISSN)
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  • 2508-4046(eISSN)
한국열처리공학회 (The Korean Society for Heat Treatment)
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침탄처리된 기어의 미세 조직학적 손상 원인분석

Failure Analysis of Carburized Gears by Microstructural Observation

  • 전해동 (마스터 컴퍼니 기술 연구소) ;
  • 장성호 (금오공과대학교 대학원) ;
  • 김경욱 (금오공과대학교 대학원) ;
  • 국연호 (금오공과대학교 대학원)
  • 투고 : 2014.04.24
  • 심사 : 2014.05.16
  • 발행 : 2014.07.30
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초록

The gear was made of SNC815 case-carburized, quench hardened and tempered steel. The gears were failed far earlier than the expected service life used in the industrial site. Causes of the failed gear were analyzed by microstructure observation. By the SEM and micro structure examinations, the damaged surfaces had been weared and failed by fatigue. Through microscope observation on the damaged surface, it was found that the cause of failure was determined by external overloading and the initial stage of the damage was closely related to complex contact fatigue failure. The overload and contact fatigue contributed to the early failure cause.

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참고문헌

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