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

doi:10.4150/KPMI.2008.15.5.378

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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; Journal of Korean Powder Metallurgy Institute 2008;15(5):378-385
DOI: https://doi.org/10.4150/KPMI.2008.15.5.378

¹공주대학교 신소재공학부
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.

Keywords: Magnetic pulsed compaction (MPC);Core drill;Diamond;Co powder;

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