• 제목/요약/키워드: Cermets

검색결과 66건 처리시간 0.034초

Dissolution and Reprecipitation Behavior of TiC-TiN-Ni Cermets During Liquid-Phase Sintering

  • Yoon, Choul-Soo;Shinhoo Kang;Kim, Doh-Yeon
    • The Korean Journal of Ceramics
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    • 제3권2호
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    • pp.124-128
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    • 1997

  • An attempt was made to understand the dissolution and reprecipitation behavior of the constituent phases such as TiC, TiN, and Ti(CN) in TiC-TiN-Ni system. During the liquid-phase sintering the TiC phase was found to dissolve preferentially in Ni binder. The solid-solution phase, Ti(CN), formed around the TiN phase, resulting in a core/rim structure. This result was reproduced when large TiC particles were used with fine TiN particles. The path for the microstructural change in TiC-TiN-Ni system was largely controlled by the difference in the interfacial energy of each phase with the liquid binder phase. The results were discussed with thermodynamic principles.

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초미립 서멧 절삭공구의 절삭성능과 기계적 특성 (Cutting Performance of Submicron Cermet Tools and Their Mechanical Properties)

  • 안동길
    • 한국정밀공학회지
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    • 제18권4호
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    • pp.182-189
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    • 2001

  • TiCN based submicron cermet and similar ISO grad of the conventional cermets with TiCN of different particle size were produced by PM process, and their microstructure, mechanical properties and cutting performance were compared. The microstructure of submicron cermet was more homogeneous and showed much finer microstructure, resulting in better hardness and fracture toughness. The submicron cermet tools achieved excellent cutting performance such as wear resistance and toughness in comparison with two grades of the conventional cermets in millimg test. The relationship between microstrucure, mechanical properties and cutting performance of these cermet tools was discussed. The submicron cermet tools revealed for their potential to wide application range and interrupt cutting because of their superior wear resistance and toughness combinations.

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드래그 피니싱 공정 기반 폴리싱 연마제를 이용한 초경 드릴 및 서멧 리머 공구의 가공 평가 (Machining Evaluation of Carbide Drill and Cermet Reamer Using Polishing Media Based on Drag Finishing Process)

  • 하정호;사민우
    • 한국기계가공학회지
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    • 제21권2호
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    • pp.23-30
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    • 2022

  • After drilling, reaming is required to process a workpiece for obtaining an excellent surface quality. In general, a cermet is defined as a "composite of a ceramic hard phase and metal-bonded phase." Cermets have excellent abrasion resistance, thermal resistance, and performance in finishing operations that require surface roughness and processing precision. However, although cermets have significant advantages, research on them is insufficient. In this study, workpiece SM45C was machined using drills and cermet reamers. The cermet reamer was processed for drag finishing for 0, 4, and 6 min. The experimental results showed the effects of drag finishing on surface roughness and dimensional accuracy.

  • https://doi.org/10.14775/ksmpe.2022.21.02.023 인용 PDF KSCI