AC4Bアルミニウム合金平板鋳物の強さとデンドライトアームスペーシングに及ぼす鋳物モジュラスの影響 Effect of casting modulus on mechanical strength and dendrite arm spacing of AC4B flat aluminum alloy castings

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The average cooling rate, dendrite arm spacing (DAS), tensile strength and hardness of AC4B aluminum alloy castings were investigated. The average cooling rate decreases with increasing thickness of the casting and increasing casting mass. The DAS increases and tensile strength and hardness decrease with increasing thickness of the casting. The solidification time, <i>t</i><sub>f</sub> of the casting was represented by <i>t</i><sub>f</sub>=<i>K</i>(<i>M</i>)<sup>n</sup>, using casting modulus, <i>M</i>=<i>V/S</i> (<i>V</i>: volume of a casting, <i>S</i>: surface area of a casting) as proposed by Chvorinov. In the present work, <i>n</i>=1.8 and <i>K</i>=138 were experimentally determined. The relationship between the <i>n</i>-th power of the casting modulus (<i>M</i>), and the average cooling rate (<i>V</i><sub>S</sub>), DAS (<i>D</i><sub>S</sub>), tensile strength (σ<sub>B</sub>) and hardness (HV) were linear on a logarithmic scale. The following equations were obtained in the present experiment for the casting modulus, the average cooling rate, dendrite arm spacing, tensile strength and hardness; <i>V</i><sub>S</sub>=360(<i>M</i>)<sup>-0.1</sup>, <i>D</i><sub>S</sub>=1.4(<i>M</i>)<sup>-0.6</sup>, <sub>B</sub>=200(<i>M</i>)<sup>-0.24</sup>, HV=40(<i>M</i>)<sup>-0.24</sup>, <sub>B</sub>=4800 V<sub>S</sub><sup>-2.0</sup>, HV=3000 <i>V</i><sub>S</sub><sup>-2.0</sup>, <i>D</i><sub>S</sub>=20 <i>V</i><sub>S</sub><sup>-0.6</sup>

収録刊行物

  • 軽金属

    軽金属 46(2), 55-60, 1996-02-28

    The Japan Institute of Light Metals

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各種コード

  • NII論文ID(NAID)
    10003793412
  • NII書誌ID(NCID)
    AN00069773
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    04515994
  • NDL 記事登録ID
    3926730
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z17-284
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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