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- 자기펄스 압축성형법에 의한 다이아몬드 공구용 세그먼트 분말 성형
- 윤종수, 이정구, 이민구, 이창규, 박문석, 홍순직
- Consolidation of Segment Powder for Diamond Tool by Magnetic Pulsed Compaction
- J.S. Yun, J.G. Lee, M.K. Lee, C.K. Rhee, M.S. Park, S.J. Hong
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Journal of Korean Powder Metallurgy Institute 2008;15(5):378-385
DOI: https://doi.org/10.4150/KPMI.2008.15.5.378
2한국원자력연구소
3한국원자력연구소
4한국원자력연구소
5신한다이아몬드㈜
6공주대학교 신소재공학부
1Division of Advanced Materials Engineering, Kongju National University
2Nuclear Nano Materials Development lab. Korea Atomic Eergy Research Institute
3Nuclear Nano Materials Development lab. Korea Atomic Eergy Research Institute
4Nuclear Nano Materials Development lab. Korea Atomic Eergy Research Institute
5Shinhan diamond
6Division of Advanced Materials Engineering, Kongju National University
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Abstract
This article presents the successful consolidation of the mixed Co and Diamond powders for a drilling segment by the combined application of magnetic pulsed compaction (MPC) and subsequent sintering, and their properties were analyzed. Homogeneous hardness (Hv 220) and density (97%) of sintered bulks fabricated by MPC were obtained by the new technique, where higher pressure has been employed for short period of time than that of general process. A fine microstructure and homogeneous hardness in the consolidated bulk were observed without cracks. Relatively higher drilling speed of 9.61 cm/min and life time of 6.55 m were found to the MPCed specimens, whereas the value of the specimens fabricated by general process was 11.71 cm/min and 7.96 m, respectively. A substantial improvement of mechanical properties of segment was achieved through this study.
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