熱間加工用金型鋼のヒートクラック形成に及ぼす焼入れ冷却速度の影響 Effects of Cooling Rate from Austenitizing Temperature on Heat Crack Formation of Die Steel for Hot Working

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  Thermal fatigue behaviors of die steel for hot working were investigated, in which cylindrical test bars with U-notch were directly immersed in Al-alloy melt maintained at 923 K, and then cooled quickly to water. The relation between thermal heat cracking and the cooling rate from the austenitizing temperature was mainly discussed in this study. The number of heat cracks initiated at the notch root increased and the elongation and Charpy impact value decreased as the cooling rate of the quenching decreased. While the maximum crack length was the same for all specimens due to the same tensile strength, the total length of each crack increased as the cooling rate decreased. It has therefore been concluded that raising the toughness and elongation by quenching at a fast cooling rate is effective for improving the die life.

収録刊行物

  • 鋳造工学 = Journal of Japan Foundry Engineering Society

    鋳造工学 = Journal of Japan Foundry Engineering Society 70(3), 180-185, 1998-03

    公益社団法人 日本鋳造工学会

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各種コード

  • NII論文ID(NAID)
    10002553574
  • NII書誌ID(NCID)
    AN10514770
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    13420429
  • NDL 記事登録ID
    4437163
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z17-277
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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