冷間加工後の熱処理によるSUS316FR ステンレス鋼の組織変化

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タイトル別名
  • Change in Structure of SUS316FR Stainless Steel by Heat-treatment after Cold Working
  • レイカン カコウ ゴ ノ ネツ ショリ ニ ヨル SUS316FR ステンレスコウ ノ ソシキ ヘンカ

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The change in structure of SUS316FR stainless steel caused by heat-treatment after cold working was investigated on the basis of Vickers hardness test, X-ray diffraction, and SEM observation. At the heat-treatment temperature below 300℃, Vickers hardness, HV, increased slightly, and half-value width of X-ray diffraction peak decreased slightly. These phenomena result from the diffusion of interstitial impurities to dislocation core. Between 300℃ and 500℃, HV was approximately constant, and the half-value width decreased. These phenomena result from the rearrangement of dislocations. At temperatures above 500℃, both HV and the half-value width decreased. The decrease in HV and the half-value width was thought to be caused by re-crystallization with the heat-treatment and large decrease of dislocation density. By the heat-treatment above 700℃, grain size was grown.

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