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Consolidation of Segment Powder for Diamond Tool by Magnetic Pulsed Compaction

자기펄스 압축성형법에 의한 다이아몬드 공구용 세그먼트 분말 성형

  • Yun, J.S. (Division of Advanced Materials Engineering, Kongju National University) ;
  • Lee, J.G. (Nuclear Nano Materials Development lab. Korea Atomic Eergy Research Institute) ;
  • Lee, M.K. (Nuclear Nano Materials Development lab. Korea Atomic Eergy Research Institute) ;
  • Rhee, C.K. (Nuclear Nano Materials Development lab. Korea Atomic Eergy Research Institute) ;
  • Park, M.S. (Shinhan diamond) ;
  • Hong, S.J. (Division of Advanced Materials Engineering, Kongju National University)
  • Published : 2008.10.28

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

References

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