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복합학
지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 한양대학교 청정에너지연구소 Journal of Ceramic Processing Research Journal of Ceramic Processing Research 제5권 제1호
- 발행연도
- 2004.3
- 수록면
- 18 - 24 (7page)
이용수
초록· 키워드
The goal of the study was to fabricate laminated WC-Co cutting tools with residual thermoelastic stress states tailored to counteract the thermal and mechanical stresses imposed by machining. Cutting tools were fabricated using tape casting and bulk powder compaction of submicrometre and nanograin WC-Co powders. The weight fraction of cobalt in the tool was graded to produce residual compressive stresses in the tool surface. Spark plasma sintering (SPS) was used to fully densify the laminates while suppressing cobalt redistribution via sub-eutectic (solid state) sintering. Microstructural analysis showed that the cobalt binder was not well distributed around the WC grains after sintering. Contiguity of the WC grains was high, and segregation of cobalt was apparent. These factors are expected to hinder machining performance. However, the laminated tools performed similarly to commercially-available, monolithic tools in turning Ti-6Al-4V alloy. This demonstrates that the incorporation of residual stresses into the surface of the tool is beneficial for wear resistance. Refinement of powder processing methods to produce laminated WC-Co tools with a better distribution of cobalt should yield a further increase in machining performance.
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