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자동차 엔진용 소결 밸브시트의 미세조직과 기계적 성질에 미치는 고체윤활제의 영향 KCI 등재

Effects of Solid Lubricants on Microsteucture and Mechanical Proerties of Sintered Valve Seats for Automobile Engine

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한국분말야금학회지 (Journal of Korean Powder Metallurgy Institute)
한국분말재료학회(구 한국분말야금학회) (Korean Powder Metallurgy Institute)
초록

Engine valve seat is a functionally important part for maintaining engine performance. The progress of automotive technology has increased the severity of conditions to which it is exposed, especially as regards LPG fuel engines and turbocharger. Therefore, it requires excellent heat and wear resistance to meet the severe condition inside the engine. In the present study, effects of solid lubricants such as CaF, MnS and MoS on microstructure and mechanical properties of sintered Fe alloys for valve srats have been investigated for the development of valve seat material with high temerature wear resistance. As a results of engine simulation test, 0.5 wt% CaF specimen showed the most excellent property, but in the overall aspect of view valve recession has increased with increasing the amount of solid lubricants.

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