The proposal for the next-generation microstructural control technique of steel by using ultra-fine lath austenitic starting structure

• Project/Area Number: 22686065
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Single-year Grants
• Research Field: Structural/Functional materials
• Research Institution: Kyushu University
• Principal Investigator: NAKADA Nobuo 九州大学, 工学研究院, 助教 (50380580)
• Project Period (FY): 2010 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥19,240,000 (Direct Cost: ¥14,800,000、Indirect Cost: ¥4,440,000); Fiscal Year 2011: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000); Fiscal Year 2010: ¥14,950,000 (Direct Cost: ¥11,500,000、Indirect Cost: ¥3,450,000)
• Keywords: 鉄鋼材料 / 超微細粒 / 相変態 / 組織制御 / マルテンサイト変態

Research Abstract

For the production of fine-grained structural steel, the microstructural characteristics of lath austenite formed by martensitic reversion and the microstructure transformed from it were investigated. As a result, it was confirmed in a model steel that the lath austenite has fine lath structure containing high-density dislocations. In addition, it was suggested that martensitic reversion takes place even in a low alloyed steel under the specific condition controlled by alloy designing and heat treatment.

Research Products

• [Presentation] せん断型逆変態により形成されるオーステナイト組織 (2012)
  • Author(s): 深川怜史、中田伸生、土山聡宏、高木節雄
  • Organizer: 日本鉄鋼協会春季講演大会
  • Place of Presentation: 横浜国立大学(横浜市)
  • Year and Date: 2012-03-29
• [Presentation] せん断型逆変態により生成したオーステナイト組織の特徴 (2011)
  • Author(s): 中田伸生
  • Organizer: 高温強度と組織形成の材料科学研究会(招待講演)
  • Place of Presentation: 樺川荘(高松市)
  • Year and Date: 2011-08-26
• [Presentation] せん断型逆変態により生成したオーステナイト組織の特徴 (2011)
  • Author(s): 中田伸生
  • Organizer: 高温強度と組織形成の材料科学研究会
  • Place of Presentation: 樺川荘(高松市)(招待講演)
  • Year and Date: 2011-08-26
• [Remarks]
  • URL: http://takaki.zaiko.kyushu-u.ac.jp/