Development of high-strength frictional materials for seawater

• Project/Area Number: 17K06959
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Naval and maritime engineering
• Research Institution: Tokyo University of Marine Science and Technology
• Principal Investigator: FUJINO Toshikazu 東京海洋大学, 学術研究院, 准教授 (70508514)
• Co-Investigator(Kenkyū-buntansha): 地引 達弘 東京海洋大学, 学術研究院, 教授 (40322094) ; 菅原 隆志 東京海洋大学, 海洋工学部, 助手 (90456319) ; 徳田 祐樹 地方独立行政法人東京都立産業技術研究センター, 開発本部開発第二部表面・化学技術グループ, 副主任研究員 (30633515) ; 柳澤 憲史 長野工業高等専門学校, 機械工学科, 准教授 (90585580)
• Project Period (FY): 2017-04-01 – 2020-03-31
• Project Status: Completed (Fiscal Year 2019)
• Budget Amount: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000); Fiscal Year 2019: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2017: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
• Keywords: 海洋環境 / トライボロジー / 表面改質 / 耐食性 / 低摩擦 / 耐摩耗性 / 高強度摩擦材

Outline of Final Research Achievements

Friction reforming technique is a technical treatment to create a coating layer of hard powder by continuously feeding a mixed of hard fine powder that easily alloys with the base material and carrier powder between a base material and a tool and rubbing them under local high pressure. In this study, this friction reforming technique and heat treatment were used to provide a high strength metals with a surface having high adhesion and corrosion resistance, low friction and excellent wear resistance in seawater. And then, we obtained useful results that contribute to the development of high strength frictional materials that can be used in seawater through various evaluation test.

Academic Significance and Societal Importance of the Research Achievements

海水中用高強度摩擦材に必要とされる条件は，耐食性と低摩擦・耐摩耗性を有することが挙げられるが，これらを海洋環境の汚染なく満足する摩擦材は強度・耐久性に難がある高分子材料を除けばほとんどなく，またこの分野の研究自体極めて少ないのが現状である．本研究では，強度の高い金属に，優れた耐食性と低摩擦かつ優れた耐摩耗性を独創的な方法で付与し，海水中にて使用可能な高強度の摩擦材の開発に資する有益な成果を得ることができた．これは学術的にも社会的にも意義のあることである．

Research Products

• [Journal Article] Electrochemical analysis of corrosion and wear resistance characteristics of stainless steel modified by friction reforming under micro-reciprocating frictional conditions in seawater (2018)
  • Author(s): Yao Zhu, Toshikazu Fujino, Tatsuhiro Jibiki
  • Journal Title: Mechanical Engineering Letters Volume: 4 Pages: 18-00177
  • NAID: 130007402127
  • Peer Reviewed
• [Journal Article] 摩擦改質と浸炭熱処理援用による表面改質層を有する合金鋼の海水中における耐食性と摩擦・摩耗特性 (2017)
  • Author(s): 陳函、大和田貴理子、菅原隆志、藤野俊和、地引達弘
  • Journal Title: 日本マリンエンジニアリング学会誌 Volume: 52-6 Pages: 112-119
  • NAID: 130006314666
  • Peer Reviewed
• [Journal Article] Electrochemical Analysis of Various Materials Modified for the Marine Environment by Friction Reforming (2017)
  • Author(s): Yao Zhu, Toshikazu Fujino, Tatsuhiro Jibiki
  • Journal Title: ECS Transactions Volume: 80-10 Pages: 1415-1426
  • Peer Reviewed
• [Journal Article] Thermodynamic Discussion of Various Materials Modified by Friction Reforming for Adaptation to a Marine Environment (2017)
  • Author(s): Kiriko Owada, Toshikazu Fujino, Tatsuhiro Jibiki
  • Journal Title: Proceedings of International Symposium on Marine Engineering (ISME) October 15-19, 2017, Tokyo, Japan. Volume: C14-103 Pages: 423-428
  • NAID: 130006742848
  • Peer Reviewed
• [Presentation] 海水中における摩擦改質と熱処理援用による表面改質層を有するステンレス鋼の耐食性と耐摩耗性 (2018)
  • Author(s): 豊田健一郎，藤野俊和，菅原隆志，地引達弘，岡部森，長谷川慎二
  • Organizer: 日本トライボロジー学会トライボロジー会議2018秋伊勢
• [Presentation] Electrochemical discussion of various materials modified by friction reforming adapted to marine environment (2017)
  • Author(s): Zhu Yao, Toshikazu Fujino, Tatsuhiro Jibiki
  • Organizer: 232nd ECS Meeting
  • Int'l Joint Research