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이 논문의 연구 히스토리 (3)

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Wear of seating face of exhaust valve and seat insert are important for the performance and reliability of engine. To improve the quality of engine valve and seat insert, the wears of those seating face have to be inspected. A wear test machine of the engine valve and seat insert was used to study them. Test variable was cycle numbers which is a very important factor for wears of the two faces. Cycle numbers tested were 2.0? 0?, 4.0? 0?, 6.0? 0? and 8.0? 0?. Test speed was 25㎐, test temperature was 350℃, load was 1960N and fuel was LPG. Average Rmax of exhaust valve when cycle number is 2.0? 0? was 74.7㎛, and the average Rmax was increased by 1.5㎛/10?cycle. Average Rmax of seat insert when cycle number is 2.0? 0? was 82.9㎛ and the average Rmax was increased by 1.3㎛/10?cycle. Wear mechanisms of the two faces were tribochemical reaction. Reaction product was covered the faces and protected the wears of the two matrixes. O, C, V, Ca and N were observed in the reaction product.

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Abstract
1. 서론
2. 실험 방법 및 조건
3. 실험 결과
4. 토의
5. 결론
References

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UCI(KEPA) : I410-ECN-0101-2009-556-017190874