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자료유형
학술저널
저자정보
저널정보
한국생산제조학회 한국생산제조학회지 한국공작기계학회 논문집 Vol.15 No.6
발행연도
2006.12
수록면
32 - 37 (6page)

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Micron size Co-alloy(T800) powder was coated on Inconel 718 by HVOF thermal spraying for the studies of the improvement of durability of high speed spindle by using Taguchi program for the parameters of spray distance, flow rates of hydrogen and oxygen and powder feed rate. The optimal coating process was determined by the studies of coating properties such as micro-structure, porosity, surface roughness and micro hardness. Friction and wear behaviors of coatings were investigated by sliding wear test at room temperature and 1000OF(538℃). At both room temperature and 538℃ the sliding wear debris and friction coefficients of the coating were drastically reduced compared with the surface of non-coated parent material. This shows that Co-alloy powder coating is highly recommendable for the durability improvement surface coating of high speed air-bearing spindle. At high temperature wear traces and friction coefficients of both coating and non-coating were drastically reduced compared with those of room temperature since the brittle oxides were formed easily on the surface, and the brittle oxide phases were attrited by the reciprocating sliding wear according to the complicated mixed wear mechanisms These oxide particles, partially melts and the melts play role as lubricant and reduce the wear and friction coefficient. This also shows that Co-alloy powder coating is highly recommendable for the durability improvement surface coating on the surface vulnerable to frictional heat such as high speed spindles.

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Abstract
1. 서론
2. 실험방법
3. 실험결과 및 고찰
4. 결론
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