冷延後焼鈍した高密度焼結鉄板の成形性とその集合組織について

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  • The Formability and Texture of High-density Sintered Iron Sheets Annealed after Cold-rolling
  • レイエン ゴ ショウドン シタ コウミツド ショウケツ テッパン ノ セイケイセイ ト ソノ シュウゴウ ソシキ ニ ツイテ

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The formability of high-density iron sheets, sintered at 850°C for 4 hours in hydrogen, subsequently coldrolled, and annealed in a two-stage process, was examined by using the Erichsen cupping test, the deep drawing test, and r-value measurement. The annealing textures of the iron sheets were also investigated by means of an X-ray pole figure method and magnetic torque curve analysis. The results obtained are summarized as follows: (1) The formability of high-density sintered iron sheets in this study was similar to that of low carbon iron sheets. (2) The high-density sintered iron sheets which were reduced within the range of 85% to 90% by the secondary cold-rolling before annealing, were mechanically isotropic in the sheet plane. (3) The annealing textures of high-density sintered iron sheets which were mechanically isotropic in the sheet plane, showed that the intensity of (111) [112] and (211) [011] orientations was strong, whereas that of (110) [001] and (110) [110] orientations was weak, and the (100) [011], (100) [012] and (311) [136] orientations appeared slightly in the texture of the sheets.

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