熱延ステンレス鋼板のエッジシーム疵形成機構

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書誌事項

タイトル別名
  • Formulation Mechanism of Edge-Seam Defects on Hot-Rolled Stainless Steel
  • 熱延ステンレス鋼板のエッジシーム疵形成機構 : エッジシーム疵の制御に関する研究(第1報)
  • ネツエン ステンレス コウバン ノ エッジシームキズケイセイ キコウ : エッジシームキズ ノ セイギョ ニ カンスル ケンキュウ(ダイ1ポウ)
  • ―A Study of Edge-Seam Defect Control on Hot-Rolled Ferritic Stainless Steel Ⅰ―
  • ―エッジシーム疵の制御に関する研究 第1報―

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抄録

The formation mechanism of edge-seam defects at the edges of hot-rolled strips of ferritic stainless steel was examined experimentally using a ferritic stainless-steel slab and crystal plasticity finite element analysis. Wrinkles in rolled strips occur owing to differences in deformation between coarse grains formed in orientation rotation as the reduction ratio increases, determined on the basis of the crystal anisotropy of coarse grains with random orientations that were formed during slab heating. In the initial stage of hot rolling, the depth of wrinkles increases with the diameter of such grains. Because the T.D. deformation of {111} is small and that of {001} is large, a grain sandwiched between {111} and {001} grains undergoes a large amount of deformation owing to the large constraining force of the grain boundaries of such grains. As a result, the formation of edge-seam defects is divided into two stages. In the early stage, wrinkles are formed by the crystal anisotropy on the side of the slab. In the second stage, those wrinkles extend toward the strip surfaces as a result of bulging during horizontal hot rolling.

収録刊行物

  • 塑性と加工

    塑性と加工 54 (633), 913-917, 2013

    一般社団法人 日本塑性加工学会

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