• 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.

• 열처리공학회지
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• 제12권1호
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• pp.78-91
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• 1999

• 열처리공학회지
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• 제2권3호
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• pp.5-11
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• 1989

• 열처리공학회지
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• 제17권1호
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• pp.36-43
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• 2004

• 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.

• 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.

• 한국정밀공학회지
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• 제18권4호
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• pp.78-84
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• 2001

This study deals with the heat-treatment technique of SM45C steel with respect to less of deformation in control. The whole process for the production of landing gear must go through with uniformally controlled heat treatment, where as most deformation usually occur in nonuniform cooling environment. When a heated metal is submerged into a certain quenchant, the rate of cooling rapidity can be measured rather slow during the early stage of the procedure due to an Occurrence of a vapor blanked. As the additional course of cooling action is applied and the vapor from a vapor blanked is destroyed simultaneously, the speed of cooling promptness can be considered rather swift. The object of this study is to control the certain deformations as in the procedure of a heat treatment for landing gear by analyzing and improving the conditions of different substance of quenching liquids. Several noticeable curves indicating the temperature variation on the ap-plied metals during the cooling procedures, along with detectable rates of water verses oil and that of different polymer solutions are illustrated.

• 열처리공학회지
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• 제20권5호
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• pp.250-258
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• 2007

• 열처리공학회지
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• 제20권4호
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• pp.209-216
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• 2007

• 열처리공학회지
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• 제2권3호
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• pp.17-20
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• 1989