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PTA법에 의한 TiC입자 표면강화 AI합금의 미세구조와 마모특성에 관한 연구
민준원(J.W.Min),유승을(S.E.Yoo),문정훈(J.H.Moon) 한국자동차공학회 1998 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1998 No.11_2
In this study. AC4C aluminium alloy hardfacing with TiC particles was conducted by plasma transferred arc method. Bead appearance, microstructure. wear behavior was characterized according to the torch current, powder feed rate and wear condition. The width and depth of bead was mainly increased with torch current. The comparison of wear behavior between AC4C alloy and PTA treated AC4C alloy showed the enhancement of wear resistance.<br/>
김관회(K.H. Kim),이용성(Y.S. Lee),유승을(S.E. Yoo),최영민(Y.M. Choi),정광철(G.C. Jung) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.11_1
To improve startability of engine at low temperature, two characteristics of glow plug are needed. The first is fast heat-up charateristic that decreases the waiting time to start and the second is duralibity that stands in combustion chamber that is under the condition of high temperature, high pressure and corrosion. Metal glow plug have been used has some limit to enhance heat-up speed and duralibity at the same time, so we developed ceramic glow plug. It takes for ceramic glow plug 3 seconds on average to 800℃ . This property of ceramic glow plug is 2 times as fast as that of metal. The result of duralibity test, 1 minute on-off test under 11 voltage, shows that no sign of shortage can be observed<br/>