대한기계학회논문집A (Transactions of the Korean Society of Mechanical Engineers A)

  • 제38권9호
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  • Pages.953-958
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  • 2014
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  • 1226-4873(pISSN)
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  • 2288-5226(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
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분말야금으로 제작된 M2 공구강과 Cu 간 기능성 경사 복합재의 물성 평가

Property Estimation of Functionally Graded Materials Between M2 Tool Steel and Cu Fabricated by Powder Metallurgy

  • 정종설 (서울과학기술대학교 NID 융합기술대학원) ;
  • 신기훈 (서울과학기술대학교 기계자동차공학과)
  • Jeong, Jong-Seol (Graduate School of NID Fusion Technology, Seoul Nat'l Univ. of Science and Technology) ;
  • Shin, Ki-Hoon (Dept. of Mechanical and Automotive Engineering, Seoul Nat'l Univ. of Science and Technology)
  • 투고 : 2014.04.14
  • 심사 : 2014.06.02
  • 발행 : 2014.09.01
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초록

형상적응형 냉각회로를 구비한 사출금형 및 히트 싱크를 가지는 절삭공구 (혹은 냉각 장치) 등과 같은 많은 응용 분야에서 기능성 경사 복합재(FGM)를 사용하여 필요한 강성을 약화시키지 않으면서 열전도 특성을 향상 시킬 수 있을 것으로 기대된다. 본 논문에서는 M2 공구강과 Cu 간의 FGM 히트 싱크를 가지는 절삭 공구 제작을 위한 기초연구로, M2 와 Cu 를 각각 100:0, 80:20, 60:40, 40:60, 20:80, 0:100 wt% 비율로 사전에 혼합한 금속분말을 분말야금법으로 가압성형 및 소결 제작 하였다. 각 시편의 단면을 광학현미경으로 관찰하여 소결 상태를 분석하였으며, 열전도도, 비열 및 열팽창계수 등 열전달 관련물성을 측정하고 분석하였다.

The use of functionally graded materials (FGMs) may enhance thermal conductivity without reducing the desired strength in many applications such as injection molds embedding conformal cooling channels and cutting tools with heat sinks (or cooling devices). As a fundamental study for cutting tools having FGM heat sinks between M2 tool steel and Cu, six FGM specimens (M2 and Cu powders were premixed such that the relative compositions of M2 and Cu were 100:0, 80:20, 60:40, 40:60, 20:80, and 0:100 wt%) were fabricated by powder metallurgy in this study. The cross sections of these specimens were observed by optical microscopy, and then the material properties (such as thermal conductivity, specific heat, and coefficient of thermal expansion) related to heat transfer were measured and analyzed.

키워드

참고문헌

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