• 제목/요약/키워드: Heat Treatment Technique

검색결과 355건 처리시간 0.016초

금속열처리를 위한 생산정보시스템 구축 (Implementation of Production Information System for Metal Heat Treatment at Middle & Small Sized Companies)

  • 이상철;류정철
    • 한국산학기술학회논문지
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    • 제8권4호
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    • pp.938-945
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    • 2007

  • 본 연구는 국내의 금속열처리 중소기업을 대상으로 필요한 정보를 현장에서 수집하고 발취하는 체계적인 방법을 결정하는데 있다. 그러므로 본 연구는 부산지역에 소재한 중소기업을 중심으로 연구되었으며, 중요한 점은 열처리 공정 현장 데이터를 의미 있는 생산기술관리 정보 데이터로 변환하여 생산기술관리를 위한 금속열처리 프로그램을 개발하였다. 결론적으로 중소기업형 금속열처리의 생산정보시스템을 구축하였다.

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나노압입시험법을 이용한 열처리 소재의 미소 변형 거동 평가 (Characterizing Small-scale Mechanical Behaviors of Heat-treated Materials with Nanoindentation Technique)

  • 최인철
    • 열처리공학회지
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    • 제33권2호
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    • pp.72-79
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    • 2020

  • To improve the mechanical properties of most structural materials for industrial applications, the control of microstructure is essential by heat treatment process or plastic deformation process. Since the mechanical behavior of structural materials is significantly influenced by their microstructure, it is inevitably preceded to understand the relationship between microstructure and strengthening mechanisms of materials which can be easily changed by heat treatment. In this regard, the nanoindentation test is useful technique for analyzing the influence of the localized microstructural change on small-scale mechanical behavior of various structural materials. Here, the interesting studies performed on various heat-treated materials are reviewed with focus on micromechanical properties obtained by nanoindentation, which are reported in the available literature.

  • https://doi.org/10.12656/jksht.2020.33.2.72 인용 PDF KSCI

Ion Implantation으로 Ca를 첨가한 단결정 Al2O3의 Crack-like Pore의 Healing 거동 - I. Crack-like Pore의 형성과 Morphological Evolution (Effect of Ca Implantation on the Sintering and Crack Healing Behavior of High Purity Al2O3 Using Micro-lithographic Technique - I. Formation of Crack-like Pore and Its Morphological Evolution)

  • 김배연
    • 한국세라믹학회지
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    • 제34권8호
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    • pp.834-842
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    • 1997

  • Controlled Ca impurity implanted inner crack-like pore in the high purity alumina single crystal, sapphire, had been created by micro-fabrication technique, which includes ion implantation, photo-lithography, Ar ion milling, and hot press technique. The morphological change and the healing of cracklike pore in Ca doped high purity single crystal alumina, sapphire, during high temperature heat treatment in vacuum were observed using optical microscopy. The dot-like surface roughening was developed and hexagon like crystal appeared on inner surface of crack-like pore after heat treatment. Bar type crystals, probably CaO.6Al2O3, were observed on the inner surface after 1 hour heat treatment at 1, 50$0^{\circ}C$, but this bar type crystal disappeared after 1 hour heat treatment at 1, $600^{\circ}C$. This disappearance means that there should be a little increase of Ca solubility limit to alumina at this temperatures.

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