電子線後方散乱回折法による浸炭焼入鋼の 硬化層深さと残留応力の評価

坂井田 喜久, 稲山 朝仁, 矢代 茂樹

研究成果: Contribution to journalArticle査読

抄録

A chromium-molybdenum steel composed of 0.20 mass% carbon was used as a starting material. Two kinds of specimens having different case depths were made by carburizing and quenching. Using the scanning electron microscope, the crystallographic information was measured on the cross-sectional hardened layer by electron backscattering diffraction method. The kernel average misorientation, <i>Θ</i>, of the inverse pole figure were calculated from the carburized surface to the interior of each specimen. The area-average, <i>Θ<sub>mean</sub></i>, was compared to the case depth and the cross-sectional residual stress distribution measured by x-ray. As a result, the area-average of the hardened layer was larger than that of the interior of specimen after heat treatment. The estimated depth of the increment in the <i>Θ<sub>mean</sub></i> found to accord to the case depth and be proportional to the depth in which large compressive residual stress was distributed on the gradually polished surface. Therefore, the case depth and eigen strain distribution that induce the compressive residual stress can be indirectly estimated by electron backscattering diffraction method.
寄稿の翻訳タイトルEvaluation of Residual Stress and Case Depth in Carburized and Quenched Chromium-Molybdenum Steel by Electron Backscattering Diffraction Method
本文言語日本語
ページ(範囲)557-562
ページ数6
ジャーナルZairyo/Journal of the Society of Materials Science, Japan
63
7
DOI
出版ステータス出版済み - 7 2014

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