분말압출법으로 제조된 /2024Al 복합재료에 있어서 압출온도와 다이각이 기계적 성질에 미치는 영향
(주)코리아스칼라
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- 2016.04.01
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- 1995.03
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서지정보
ㆍ발행기관 : 한국분말야금학회
ㆍ수록지정보 : 한국분말야금학회지 / 2권 / 1호
ㆍ저자명 : 성병권, 이성호, 이지환, 유연철
영어 초록
Effects of the extrusion temperature and die angle on the tensile properties of SiCIyAl composites in powder extrusion have been investigated. SiCP/Al composites were extruded at various extrusion temperatures (450, 500, ) under the extrusion ratio of 25 : 1. The ram speed was maintained at 13 cm/min for all the extrusion conditions. The surface of the extruded rod appeared to be smooth without tearing at 450 and 50, whereas it was very rough due to tearing at . It was found that the tensile strength and elongation of the composites extruded at are greater than those of composites extruded at This is due to the easier plastic deformation of composite extruded at , compared with the composites extruded at . The effect of die angle was examined under 20=60, 120, die angles at extrusion temperature of under 25:1 extrusion ratio. The tensile strength of the composites extruded with 20=approved to be higher than that of the composties extruded with 28 : 120 and This is attributable to the higher extrusion pressure, which mixed composite powders could be densely consolidated at elevated temperatures, resulting from high friction force between billet and sliding surface of conical die.
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