• Title/Summary/Keyword: Heat-treatment Technique

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

  • Lee, Sang-Cheol;Yu, Jeong-Cheol
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.8 no.4
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    • pp.938-945
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    • 2007

  • For middle & small sized metal heat treatment companies in Korea, this paper is crucial to have a systematic way of collecting and storing field data, and extracting relevant information when necessary. Therefore, it is concerned with developing a metal heat treatment program system for production technique control which is mainly focused on processing heat treatment filed data, converting the data into meaningful production technique control information, and illustrating a case study of a middle & small sized company in Busan province. Consequently, we are implemented a production information system for metal heat treatment a middle & small sized type company.

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

  • Choi, In-Chul
    • Journal of the Korean Society for Heat Treatment
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    • v.33 no.2
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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

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 (Ion Implantation으로 Ca를 첨가한 단결정 Al2O3의 Crack-like Pore의 Healing 거동 - I. Crack-like Pore의 형성과 Morphological Evolution)

  • 김배연
    • Journal of the Korean Ceramic Society
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    • v.34 no.8
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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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