분말야금공법으로 제조된 CAD/CAM용 Co-Cr-Mo 합금의 미세조직 및 기계적 특성
Microstructure and Mechanical Properties of Co-Cr-Mo alloy for CAD/CAM Applications fabricated by Powder Metallurgy Process
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차성수:Cha Sung-Soo
저자없음:No authors listed
KMID : 0362120150370040235
Abstract
Purpose: The aims of this study are compare with microstructure and mechanical properties of Co-Cr-Mo alloys fabricated by powder metallurgy(P/M) process and casting process respectively.
Methods: Microstructure and micro-hardness were tested by SEM and Vickers Hardness Tester. The sintered specimen was produced by furnace-coolling after sintering, however the casting specimen were produced thru aircooling and water-cooling after the casting. For observation of phase transformation during sintering, DSC analyzing was carried out.
Results: Mean pore size of sintered Co-Cr-Mo alloy was 4.32㎛ and that of casting alloy was 1.63㎛. Hardness of sintered alloy was lower than water-quenched casting alloy.
Conclusion: Proper sintering temperature of Co-Cr-Mo alloy was above 1,200℃ and pore size of casting specimen were finer than sintered specimen, but hardness were similar.
키워드
Co-Cr-Mo alloy; Powder metallurgy; CAD/CAM; Sintering Microstructure; Mechanical Property
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