• Title/Summary/Keyword: 자기상

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Relationship between Magnetic and Mechanical Properties of Cermet Tools (절삭공구용 서멧의 자기적 특성과 기계적 성질의 관계)

  • Ahn, Dong-Gil;Lee, Jeong-Hee
    • Journal of the Korean Society for Nondestructive Testing
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    • v.20 no.3
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    • pp.231-237
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    • 2000

  • The commercial cermet cutting tools consist of multi-carbide and a binder metal of iron group, such as cobalt and nickel which are ferromagnetic. In this paper, a new approach to evaluate the mechanical properties of TiCN based cermet by magnetic properties were studied in relation to binder content and sintering conditions. The experimental cermet was prepared using commercial composition with the other binder contents by PM process. It was found that the magnetic properties of the sintered cermets remarkably depended on the microstructure and the total carbon content. The magnetic saturation was proportional to increment of coercive force. At high carbon content in sintered cermet, the magnetic saturation was increased by decreasing the concentration of solutes such as W, Mo, Ti in Co-Ni binder. As the coercive force increases, the hardness usually increases. The strength and toughness of the cermet also increased with increasing the magnetic saturation. The measurement of magnetic properties made it possible to evaluate the mechanical properties in the cermet cutting tools.

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