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급속응고법으로 제조한 과공정 Al-Si 합금분말 압출재의 마멸특성
안영남,조규섭,나형용 ( Young Nam Ahn,Gue Serb Cho,Hyung Yong Ra ) 한국주조공학회 1994 한국주조공학회지 Vol.14 No.5
N/A Wear resistance and wear mechanism of hypereutectic Al- (15∼40 ) wt%Si alloys were investigated. Primary Si particles under 20㎛ size were formed in hypereutectic Al-Si alloy powders due to rapid solidification. But the Si particles of extruded bars were finely distributed in smaller size than that of atomized powders. The wear mechanism of hypereutectic Al-Si alloys was divided into three types of wear phenomena, which were abrasive wear, delamination wear and severe adhesive wear according to sliding speed and load. At low sliding speed and load, wear mechanism was abrasive wear, so Al-15wt%Si alloy showed the best wear resistance. At high sliding speed and load, wear mechanism was adhesive wear, and Al-40wt%Si alloy showed the best wear resistance.