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Improvement of All-Green Welding Spatter Adhesion Preventive Agent and Reliability Demonstration of Welded Zone

Research Project

Project/Area Number 17K06883
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Metal making/Resorce production engineering
Research InstitutionMiyakonojo National College of Technology

Principal Investigator

Takahashi Akihiro  都城工業高等専門学校, 機械工学科, 教授 (90370056)

Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2019: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2018: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords溶接施工 / スパッタ粒子 / 天然材料 / 強度保証 / 火山灰有効利用 / 溶接スパッタ付着防止剤 / 溶接接手 / 材料加工・処理 / 資源開発工学
Outline of Final Research Achievements

We have developed all-green spatter adhesion preventive agents made from volcanic ash and tap water for use in arc welding. In this study, we have prepared a total of 99 samples of volcanic ash and water. Relationship between the sample and anti-adhesion effect, contact angle measurement, mechanical properties of the weld zone and diffusional hydrogen content in welded plate are investigated. As a result, we have clarified the optimum mixing amount of volcanic ash and water showing the spatter adhesion preventive effect. Strength reliability of welded plate with coating of the sample is confirmed by mechanical test and the hydrogen content test. From spatter adhesion model experiment using only water, it is suggested that the spheroidization of the spatter particles after solidification is based on the heat transfer effect between the molten spatter and water.

Academic Significance and Societal Importance of the Research Achievements

水と火山灰を混合した新規溶接スパッタ付着防止剤の開発的研究を行った。その結果、スパッタ付着防止機能を十分に有し、誰でも簡易に作製できる低コストなアーク溶接用スパッタ付着防止剤を提案できた。最大のメリットは、有機合成物由来の現行品に比べ、著しく人体や地球環境に影響を及ぼさない点である。またスパッタ球状化モデル研究を実施し、溶融スパッタの凝固潜熱と水の蒸発顕熱の熱輸送原理に基づくスパッタ球状化メカニズムを考察した。この時、輸送された熱エネルギーをスパッタ重量で除したパラメータを新たに提案し、接触角との相関を得た。この点について学術的意義のある研究成果が得られたと考えている。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (7 results)

All 2019 2018 2017

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (6 results) (of which Int'l Joint Research: 6 results)

  • [Journal Article] Contact Angle Measurement of Arc Welding Spatter after Coating with Spatter Adhesion Preventive Agent2019

    • Author(s)
      A. Takahashi, N. Yamamoto, M. Tomiyama and T. Toyohiro
    • Journal Title

      Journal of Tropical Resources and Sustainable Science

      Volume: vol. 7 Pages: 17-19

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Presentation] A Study on Spatter Spheroidizing Mechanism in Metal Arc Welding2019

    • Author(s)
      Tatsuki Ando, Akihiro Takahashi, Naoyuki Yamamoto, Mitsuteru Tomiyama and Toshinobu Toyohiro
    • Organizer
      14th International Symposium on Advanced Science and Technology in Experimental Mechanics
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Welding Spatter Configuration under each Surface Condition during SUS304 Welding2019

    • Author(s)
      Tatsuki Ando, Akihiro Takahashi, Naoyuki Yamamoto and Mitsuteru Tomiyama
    • Organizer
      5th International Workshop on Fundamental Research for Science and Technology 2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Contact Angle Measurement of Arc Welding Spatter After Coating with Spatter Adhesion Preventive Agent2018

    • Author(s)
      A. Takahashi, N. Yamamoto and T. Toyohiro
    • Organizer
      International Conference on Science, Technology and Education 2018
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Solidification Behavior of Arc Welding Spatter on SUS304 Plate Coated by Spatter Adhesion Preventive Agent2018

    • Author(s)
      K. Minamihara, A. Takahashi, N. Yamamoto and T. Toyohiro
    • Organizer
      8th International Joint Symposium on Education Engineering 2018
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Spatter Adhesion Preventive Agent with Glassy Volcanic Ash Bolloon in SUS304 Welding2017

    • Author(s)
      D.Kawasaki, A.Takahashi, N.Yamamoto and T.Toyohiro
    • Organizer
      International Eorkshop on Fundamental Research for Science and Technology 2017
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Spatter Adhesion Inhibitor made of Volcanic Ash for Metal Arc Welding2017

    • Author(s)
      D.Kawasaki, A.Takahashi and N.Yamamoto
    • Organizer
      12th International Symposium on Advanced Science and Technology in Experimental Mechanics
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research

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Published: 2017-04-28   Modified: 2021-02-19  

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