침탄처리된 기어의 미세 조직학적 손상 원인분석Failure Analysis of the Carburized Gears by Microstructural Observation
- Other Titles
- Failure Analysis of the Carburized Gears by Microstructural Observation
- Authors
- 전해동; 장성호; 김경욱; 국연호
- Issue Date
- 2014
- Publisher
- 한국열처리공학회
- Keywords
- Case-carburized; Failed gear; Contact fatigue failure; Micro pit; Frictional heat of the surface; Model of crack generation
- Citation
- 열처리공학회지, v.27, no.4, pp.191 - 201
- Journal Title
- 열처리공학회지
- Volume
- 27
- Number
- 4
- Start Page
- 191
- End Page
- 201
- URI
- https://scholarworks.bwise.kr/kumoh/handle/2020.sw.kumoh/2087
- ISSN
- 1225-1070
- Abstract
- The gear was made of SNC815 case-carburized, quench hardened and tempered steel. The gearswere failed far earlier than the expected service life used in the industrial site. Causes of the failed gear wereanalyzed by microstructure observation. By the SEM and micro structure examinations, the damaged surfaceshad been weared and failed by fatigue. Through microscope observation on the damaged surface, it wasfound that the cause of failure was determined by external overloading and the initial stage of the damage wasclosely related to complex contact fatigue failure. The overload and contact fatigue contributed to the early failurecause.
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