Refinement of As-cast Austenite Grain in Carbon Steel by Addition of Titanium

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概要

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• Effects of Ti addition on as-cast austenite structure of S45C steel have been investigated by means of furnace cooling experiment at a cooling rate of 0.03°C/s, focusing on the Ti addition ranging from 0 to 0.5 mol%. The Ti addition reduces average austenite grain diameter down to a size comparable to secondary dendrite arm spacing. In samples with the Ti addition, the austenite grain boundary is located at inter-dendritic position where Ti(C,N) particles exist and the refinement of austenite grain structure is ascribable to pinning effect of the Ti(C,N) particle formed in L+γ-Fe+Ti(C,N) phase field. The increment of Ti addition does not substantially change the size of Ti(C,N) particle but increases the number of the Ti(C,N) particles, leading to further refinement of the austenite grains.

• 社団法人 日本鉄鋼協会の論文
• 2009-09-15

著者

• Matsuura Kiyotaka

  Div. Of Materials Sci. And Engineering Graduate School Of Engineering Hokkaido Univ.

• Matsuura Kiyotaka

  Division Of Materials Science And Engineering Hokkaido University

• Ohno Munekazu

  Division Of Materials Science And Engineering Graduate School Of Engineering Hokkaido University

• Ohno Munekazu

  Division Of Material Science And Engineering Graduate School Of Engineering Hokkaido University

• Matsuura Kiyotaka

  Graduate School of Engineering, Hokkaido University

• Matsuura Kiyotaka

  Division Of Material Science And Engineering Hokkaido University

• Ohsasa K

  Graduate School Of Engineering Hokkaido University

• Ohsasa Kenichi

  Graduate School Of Engineering Hokkaidou Univ.

• Ohsasa Kenichi

  Division Of Molecular Chemistry Graduate School Of Engineering Hokkaido University

• SASAKI Masayoshi

  Hokkaido University

• Ohsasa Kenichi

  Dep. Of Materials Sci. And Engineering Akita Univ.

• Sasaki Masayoshi

  Hokkaido Kushiro Fisheries Experimental Station

• Ohsasa Kenichi

  Division of Materials Science and Engineering, Graduate School of Engineering, Hokkaido University

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