대한기계학회논문집A (Transactions of the Korean Society of Mechanical Engineers A)

  • 제39권8호
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  • Pages.765-772
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  • 2015
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  • 1226-4873(pISSN)
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  • 2288-5226(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
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다양한 조건에 따른 주철 소재의 마찰/마모 특성에 관한 연구

Investigation of Friction and Wear Characteristics of Cast Iron Material Under Various Conditions

  • 투고 : 2014.11.26
  • 심사 : 2015.06.03
  • 발행 : 2015.08.01
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초록

주철은 산업현장에서 중장비나 철도차량 등과 같은 다양한 기계장치의 주재료로 널리 사용된다. 이러한 기계장치의 운전 성능은 접촉 특성에 따라 크게 좌우되며 이를 개선시키기 위한 연구들이 진행되고 있다. 본 연구에서는 모래와 알루미나 입자가 주철의 마찰/마모 특성에 미치는 영향에 대해 다양한 조건에서의 미끄럼 실험을 통해 규명하였다. 입자의 크기 및 시편 온도 등을 변수로 하여 스틸 볼이 pin 으로 장착된 pin-on-reciprocator 방식의 트라이보테스터를 사용하여 실험을 진행하였다. 주사전자현미경(Scanning Electron Microscope), confocal microscope 와 3d profiler 를 이용해서 주철 시편과 스틸 볼의 마모 표면을 관찰하고 마모량을 정량적으로 측정하여 마모 특성을 파악하였다. 실험 결과 주철의 마찰/마모 특성은 입자 주입에 의해 크게 달라짐을 알 수 있었다. 또한, 주철 시편에 가해준 온도에 따라 마찰/마모 특성이 크게 달라지는 것을 확인하였다. 이 연구의 결과는 산업에서 주철 재료의 트라이볼로지 특성을 이해하는데 도움이 될 것이다.

Cast iron is widely used in fields such as the transport and heavy industries. For parts where contact damage is expected to occur, it is necessary to understand the friction and wear characteristics of cast iron. In this study, we use cast iron plates as the specimens to investigate their friction and wear characteristics. We perform various experiments using a reciprocating type tribotester. We assess the frictional characteristics by analyzing the friction coefficient values that were obtained during the sliding tests. We observe the wear surfaces of cast iron and steel balls using a scanning electron microscope, confocal microscope, and 3d profiler. We investigate the friction and wear characteristics of cast iron by injecting sand and alumina particles having various sizes. Furthermore, we estimate the effect of temperature on the friction and wear characteristics. The results obtained are expected to aid in the understanding of the tribological characteristics of cast iron in industry.

키워드

참고문헌

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