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2008 Fiscal Year Annual Research Report

溶接時の温度分布及び材料特性制御による船体ブロックの高精度ニアネットシェイプ工作

Research Project

Project/Area Number 20360393
Research InstitutionOsaka University

Principal Investigator

望月 正人  Osaka University, 大学院・工学研究科, 准教授 (10304015)

Co-Investigator(Kenkyū-buntansha) 三上 欣希  大阪大学, 大学院・工学研究科, 助教 (40397758)
Keywords溶接変形 / ニアネット / プロセス中制御
Research Abstract

船舶における建造及び艤装時に代表されるように,溶接構造物において工作精度を高めることは,コスト面のみならず性能面にも影響を及ぼす重要なテーマである.溶接変形はその代表的なものであり,これまでは,溶接前の対策として溶接変形を拘束の力で完全に抑制することは困難なことから,溶接後に熱加工(線状加熱や「お灸」)や機械加工などの後処理によって変形を矯正している場合が多い.しかし,生産プロセス全体の効率を考えると,溶接後に何らの処理を加えることなしに溶接プロセス中に変形を制御してしまうのが好ましい.そこで,溶接施工終了後そのままの状態で必要な部材形状・寸法精度を確保することを目指した,高精度ニアネットシェイプ工作法を開発し,(1)温度分布制御による溶接変形アクティブインプロセスコントロール法の実用化,(2)材料特性制御による溶接変形コントロール法の確立,(3)温度分布制御・材料特性制御ハイブリッド溶接コントロール法への展開,(4)高信頼性変形制御継手の溶接方法の確立,の4項目を具体的な目標として本研究を進めた.初年度となる本年度は,溶接変形コントロールのために有効な温度分布制御指針についての検討,溶接変形コントロールに有効な材料特性の把握,材料特性による溶接変形コントロールに及ぼす溶接施工条件の影響に関する基礎的検討,温度分布制御・材料特性制御による溶接変形制御継手の継手性能評価,実際の使用形態を考慮した施工性の評価,などについての具体的成果を得た.

  • Research Products

    (25 results)

All 2009 2008

All Journal Article (15 results) (of which Peer Reviewed: 13 results) Presentation (10 results)

  • [Journal Article] Thermal Elastic-Plastic Analysis Considering Temperature Rise by Rapid Plastic Deformation in Undermatched Joints2009

    • Author(s)
      M. Mochizuki, G. B. An, M. Toyoda
    • Journal Title

      Trans. ASME, J. Pressure Vessel Technology Vol. 131, N0. 3

      Pages: DOI : 10.1115/1.3027477

    • Peer Reviewed
  • [Journal Article] Effect of Distance from the Center of Weld to the Fixed End on Residual Stress and Stress Intensity Factor of the Piping Weld2009

    • Author(s)
      K. Miyazaki, M. Numata, K. Saito, M. Mochizuki
    • Journal Title

      Trans. ASME, J. Pressure Vessel Technology Vol. 131, No. 2

      Pages: DOI : 10.1115/1.3007428

    • Peer Reviewed
  • [Journal Article] Angular Distortion of Fillet Welded T Joint Using Low Transformation Temperature Welding Wire2009

    • Author(s)
      Y. Mikami, Y. Morikage, M. Mochizuki, M. Toyoda
    • Journal Title

      Science and Technology of Welding and Joining Vol. 14, No. 2

      Pages: 97-105

    • Peer Reviewed
  • [Journal Article] 溶接変形に及ぼす始終端部の影響に関する解析的検討2008

    • Author(s)
      望月正人, 三上欣希, 山崎紘樹, 豊田政男
    • Journal Title

      溶接学会論文集 第26巻, 第2号

      Pages: 145-151

    • Peer Reviewed
  • [Journal Article] Study of Weldability for Circularly Heat Input2008

    • Author(s)
      H. Shirai, S. Okano, M. Mochizuki, M. Toyoda
    • Journal Title

      Materials Science Forum Vols. 580-582

      Pages: 667-670

    • Peer Reviewed
  • [Journal Article] Angular Distortion Reduction by In-Process Control Welding Using Back Heating Sources2008

    • Author(s)
      S. Okano, M. Mochizuki, M. Toyoda
    • Journal Title

      Materials Science Forum Vols. 580-582

      Pages: 585-588

    • Peer Reviewed
  • [Journal Article] Measurement of Through-Thickness Residual Stress in Primary Piping. of GirthWelded Joint2008

    • Author(s)
      M. Mochizuki, S. Okano, G. B. An, M. Toyoda
    • Journal Title

      Materials Science Forum Vols. 580-582

      Pages: 577-580

    • Peer Reviewed
  • [Journal Article] Geometrical and Welding Conditions on Through-Thickness Residual Stress inPrimary Piping of Girth Welded Joints2008

    • Author(s)
      J. Katsuyama, M. Mochizuki, H. Mori, W. Asano, G. B. An, M. Toyoda
    • Journal Title

      Materials Science Forum Vols. 580-582

      Pages: 573-576

    • Peer Reviewed
  • [Journal Article] Investigation of Wall Thinning and Residual Stress Measurements in Welded Steel Plates by Electromagnetic Acoustic Resonance2008

    • Author(s)
      K. Mitani, M. Mochizuki, M. Toyoda
    • Journal Title

      Materials Science Forum Vols. 580-582

      Pages: 113-116

    • Peer Reviewed
  • [Journal Article] 表層加工された低炭素ステンレス鋼溶接部における粒界すべり挙動に及ぼす残留応力および加工硬化の影響2008

    • Author(s)
      森裕章, 勝山仁哉, 望月正人, 西本和俊
    • Journal Title

      日本保全学会誌 第7巻, 第1号

      Pages: 36-41

    • Peer Reviewed
  • [Journal Article] Effect of Geometric Imperfections and Mechanical Properties on Bending Capacity of High-Strength Linepipes2008

    • Author(s)
      T. Satoh, Y. Mikami, M. Mochizuki, N. Suzuki, M. Toyoda
    • Journal Title

      Proc. 8th Int. Welding Symp. Japan Welding Society, Special Session : Pipeline Technology Now and Then

      Pages: 119-125

  • [Journal Article] Weld Microstructure and Distortion Controls by Considering Process MechanicS2008

    • Author(s)
      M. Mochizuki, Y. Mikami, s. Okano
    • Journal Title

      61st Annual Assembly of International Institute ofWelding IIW Doc. X-1644-08

  • [Journal Article] Parametric Study on the Effect of Geometric Imperfections on the Bending Capacity of High-Strength Linepipes2008

    • Author(s)
      T. Sato, Y. Mikami, M. Mochizuki, N. Suzuki, M. Toyoda
    • Journal Title

      Proc. 7th Inf. Pipeline Conf

      Pages: IPC2008-64544

    • Peer Reviewed
  • [Journal Article] Effect of Surface Machining and Butt-Welding on Residual Stress and Hardness of Type 316L Stainless Steel Pipes2008

    • Author(s)
      W. Asano, J. Katsuyama, K. Onizawa, M. Mochizuki, M. Toyoda
    • Journal Title

      Proc. 2008 ASME Pressure Vessels and Piping Conf

      Pages: PVP2008-61441

    • Peer Reviewed
  • [Journal Article] Effect of Transformation Temperature of Weld Metal on Welding Distortion2008

    • Author(s)
      Y. Morikage, T. Kubo, K. Yasuda, Y. Mikami, M. Mochizuki
    • Journal Title

      Proc. 27th Int. Conf. Offshore Mechanics and ArcticEngineering

      Pages: OMAE2008-57709

    • Peer Reviewed
  • [Presentation] Study on Effect of Welding Heat Input on Welded Joints Performance of Ultra-Fine Grained Steel2008

    • Author(s)
      A. Kubo, H. Iwahashi, S. Okano, M. Mochizuki, M. Toyoda. T. Nakamura, K. Hiraoka
    • Organizer
      Proc. 8th Int. Welding Symp. Japan Welding Society
    • Place of Presentation
      京都
    • Year and Date
      2008-11-18
  • [Presentation] Analytical Examination Concerning Strain Behavior Effecting Solidification Cracking Susceptibility in Low Carbon Austenitic Stainless Steel Laser Weld2008

    • Author(s)
      J. Yamada, S. Okano, H. Mori, M. Mochizuki, K. Nishimoto
    • Organizer
      Proc. 8th Int. Welding Symp. Japan Welding Society
    • Place of Presentation
      京都
    • Year and Date
      2008-11-18
  • [Presentation] Observation of Fatigue Crack Propagation Paths in Ferrite-Martensite LamellarSteels2008

    • Author(s)
      A. Inao, Y. Mikami, K. Nakashima, H. Shimanuki, M. Mochizuki, M. Toyoda
    • Organizer
      Proc. 8th Int. Welding Symp. Japan Welding Society
    • Place of Presentation
      京都
    • Year and Date
      2008-11-18
  • [Presentation] A 3-D Analytical Study of the Microscoがc Stress Distribution Considering theHeterogeneity of Microscopic Structure of Steel2008

    • Author(s)
      R. Uraguchi, Y. Mikami, R. Higuchi, M. Mochizuki, M. Toyoda
    • Organizer
      Proc. 8th Int. Welding Symp. Japan Welding Society
    • Place of Presentation
      京都
    • Year and Date
      2008-11-18
  • [Presentation] Basic Development of Structure Distortion Evaluation System Using Inherent Strain2008

    • Author(s)
      M, Hasegawa, R. Hamanaka, S. Okano, Y. Mikami, M. Mochizuki, M. Toyoda
    • Organizer
      Proc. 8th Int. Welding Symp. Japan Welding Society
    • Place of Presentation
      京都
    • Year and Date
      2008-11-18
  • [Presentation] A Parametric Study on the Effect of the Transformation Expansion of High-strength Weld Metals on the Restraint Stress2008

    • Author(s)
      Y. Mikami, M. Mochizuki, M. Toyoda
    • Organizer
      Proc. 8th Int. Welding Symp. Japan Welding Society
    • Place of Presentation
      京都
    • Year and Date
      2008-11-18
  • [Presentation] Effect of Welding Conditions on Reduction of Angular Distortion by In-Process Control Welding using Back Heating Source2008

    • Author(s)
      S. Okano, M. Mochizuki, M. Toyoda
    • Organizer
      Proc. 8th Int. Welding Symp. Japan Welding Society
    • Place of Presentation
      京都
    • Year and Date
      2008-11-18
  • [Presentation] Effects of Geometric Imperfections and Mechanical Properties on Bending Capacity of High-Strength Line Pipes2008

    • Author(s)
      T. Sato, Y. Mikami, M. Mochizuki, N. Suzuki, M. Toyoda
    • Organizer
      Proc. 8th Int. Welding Symp. Japan Welding Society
    • Place of Presentation
      京都
    • Year and Date
      2008-11-18
  • [Presentation] Numerical Simulation of Transformation-Induced Microscopic Residual Stress in Ferrite- Martensite Lamellar Steel2008

    • Author(s)
      Y. Mikami, M. Mochizuki, M. Toyoda
    • Organizer
      Abstract Book for Int. Conf. Advanced Structural andFunctional Materials 2008
    • Place of Presentation
      吹田
    • Year and Date
      2008-11-10
  • [Presentation] Computational Simulation of Weld Microstructure and Distortion by Considering Process Mechanics2008

    • Author(s)
      M. Mochizuki, Y. Mikami, S. Okano, s. Itoh
    • Organizer
      Abstract Book for Int. Conf. Advanced Structural andFunctional Materials 2008
    • Place of Presentation
      吹田
    • Year and Date
      2008-11-10

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Published: 2010-06-11   Modified: 2016-04-21  

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