急冷処理用冷却材としてのナノ流体の有効性評価

Yutaro Umehara, Tomio Okawa, Koji Enoki

研究成果: ジャーナルへの寄稿学術誌査読

2 被引用数 (Scopus)

抄録

Synopsis: Nanofluid is a liquid in which nanometer-sized particles are dispersed in base liquid. It is known that the critical heat flux and the wall superheat at the minimum heat flux in pool boiling are improved in nanofluids. In this research, performance of silica-water nanofluid as quenching coolant is explored experimentally since the above-mentioned parameters play important roles in this application. First, we investigated the immersion cooling of high-temperature test piece in the nanofluid; here, the test piece was cylindrical in shape and made of Inconel 718 or SUS304. It was confirmed that the test piece is cooled faster in the nanofluid than in distilled water. It was also found that non-uniformity of temperature in the test piece during quenching is mitigated in the nanofluid. This indicates that the silica nanofluid is considered a promising coolant to avoid the occurrence of hardening crack during quenching. Finally, Vickers hardness test was done for the Inconel 718 test piece. It was shown that the hardness tends to increase with an increase in the cooling rate even under the high cooling rate of about 1000 K/min although the difference of hardness was not noticeable between the experiments using the distilled water and the silica nanofluid as the quenching coolant.

寄稿の翻訳タイトルEvaluation of the performance of nanofluid as quenching coolant
本文言語日本語
ページ(範囲)1050-1058
ページ数9
ジャーナルTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
105
11
DOI
出版ステータス出版済み - 2019
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 凝縮系物理学
  • 物理化学および理論化学
  • 金属および合金
  • 材料化学

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