Morphology Control of Copper Sulfide in Strip Casting of Low Carbon Steel

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概要

• 論文の詳細を見る

• Copper and sulfur are the typical residual elements and impurities in steel. Previously, we reported the precipitation of very fine particles of Cu2S in copper and sulfur containing steel by strip casting process. In the present paper, the morphologies of copper sulfides in strip casting low carbon steels were distinguishably investigated by Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM).Four kinds of copper sulfide with different morphology were observed, namely duplex inclusion of oxide and sulfide (OS), plate-like copper sulfide (PS), shell-like copper sulfide surrounding the inclusions (SS), and nano-scale copper sulfide (NS), and their formation mechanisms were discussed.The OS is considered to firstly form as molten manganese silicate in molten steel, and grow up with the formation of sulfide inside of the silicate after the solidification of steel. The PS is considered to precipitate from the γ-Fe phase with plate-like shape due to semicoherency with the γ-Fe matrix. The SS is considered to precipitate in lower temperature ranges on the other pre-formed inclusions such as MnS, oxide and also Cu2−xS. The NS is considered to form in the low temperature range of γ-Fe and especially in α-Fe phase as very fine particles due to the high supersaturation, low diffusivity of component elements and the coherency with the α-Fe matrix.Based on this classification, formation stage of oxide, MnS and Cu2S was clarified and described as like TTT diagram.

• 社団法人 日本鉄鋼協会の論文
• 2006-05-15

著者

• Yang J

  Department Of Materials Physics And Energy Engineering Graduate School Of Engineering Nagoya Univers

• Yang J

  Tsinghua Univ. Beijing Chn

• Yang Jian

  Nagoya Univ. Nagoya Jpn

• Yang Jian

  Department Of Materials Physics And Energy Engineering Graduate School Of Engineering Nagoya Univers

• Nagai Kotobu

  National Institute For Materials Science

• Nagai Kotobu

  Steel Research Center National Institute For Materials Science

• Kuwabara Mamoru

  Dept. of Materials, Physics and Energy Eng. Nagoya Univ.

• KUWABARA Mamoru

  Graduate School of Engineering, Nagoya University

• YANG Jian

  Graduate School of Engineering, Nagoya University

• LIU Zhongzhu

  Graduate School of Engineering, Nagoya University

• KOBAYASHI Yoshinao

  National Institute for Materials Science

• KOBAYASHI Yoshinao

  Steel Research Center, National Institute for Materials Science

• LIU Zhongzhu

  Steel Research Center, National Institute for Materials Science

• Yang Jian

  Graduate School Of Engineering Nagoya University

• Liu Zhongzhu

  Graduate School Of Engineering Nagoya University

• Kobayashi Yuko

  National Institute For Materials Science

• Kobayashi Yoshinao

  Department Of Metallurgy And Ceramics Science Graduate School Of Science And Engineering Tokyo Insti

• Nagai K

  National Institute For Materials Science

• Kuwabara Mamoru

  Shougang Res. Inst. Of Technol.

• Kuwabara Mamoru

  Graduate School Of Engineering Nagoya University

• Liu Z

  Department Of Materials Physics And Energy Engineering Graduate School Of Engineering Nagoya Univers

• Yang J

  Department Of Materials Physics And Energy Engineering Graduate School Of Engineering Nagoya Univers

• Liu Zhongzhu

  Graduate School Of Engineering Nagoya Univ.

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