鋳物
Online ISSN : 2186-0335
Print ISSN : 0021-4396
ISSN-L : 0021-4396
検索
詳細検索
OR
閲覧
検索
63 巻, 3 号
選択された号の論文の9件中1～9を表示しています
すべての抄録を表示する
    • |<
    • <
    • 1
    • >
    • >|
研究論文
  • 汎用有限要素解析コードによる金型鋳物の変形予測
    金 基永, 佐久田 博司, 鈴木 俊夫, 梅田 高照
    1991 年 63 巻 3 号 p. 233-238
    発行日: 1991/03/25
    公開日: 2011/07/08
    DOIhttps://doi.org/10.11279/imono.63.3_233
    ジャーナル フリー
    抄録を表示する抄録を非表示にする
      Based on information obtained by experiments, deformation analysis of the casting was performed using a finite element code. Then a new prediction method for the casting deformation was proposed.
      When the same solidification contraction was input for all meshes in an analysis model, the casting did not show inward deformation. When different solidification contraction with location in the casting was input, the casting showed inward deformation. However in this case, the deformation of the casting increased with an increase in initial mold temperature, which was contrary to the experimental result.
      Therefore a new criterion to input the solidification contraction according to solidification conditions was necessary to predict the casting deformation. Nondimensional parameters were introduced assuming that solidification contraction varied according to local solidification time. This method was confirmed to be effective in prediction of the casting deformation.
      Deformation of the casting was completed near the end of solidification, and remained unchanged thereafter.
      Since the mold was composed of two nonsymmetrical parts, it bent nonsymmetrically and the maximum bending position shifted from the center, which was reflected to the final shape of the casting as a result. This was confirmed by analysis of the casting deformation considering the mold bending.
    抄録全体を表示
    PDF形式でダウンロード (633K)
  • 片状黒鉛鋳鉄の疲れ限度，減衰能におよぼすオーステンパ処理の影響
    水野 慎也, 日比野 義博, 関口 勉, 石川 秀雄
    1991 年 63 巻 3 号 p. 239-244
    発行日: 1991/03/25
    公開日: 2011/07/08
    DOIhttps://doi.org/10.11279/imono.63.3_239
    ジャーナル フリー
    抄録を表示する抄録を非表示にする
      Influence of austempering on the fatigue limit and the damping capacity of flake graphite cast iron was examined by control of chemical composition and austempering condition. In result, flake graphite cast iron has high damping capacity and high fatigue limit by austempering. The damping capacity becomes excellent as the carbon equivalent is increased and the austempering temperature is lowered. The latter results from the lower elastic modulus by the raising of lattice distortion. The fatigue limit becomes high as the carbon equivalent is decreased and the hardness is rised (HV 300 max.) . The fatigue limit of austempering higher than as cast at the same carbon equivalent and hardness.
    抄録全体を表示
    PDF形式でダウンロード (630K)
  • Mg および Mg-Li 合金のミクロ組織と性質に及ぼす Ca 添加の影響
    清水 光春, 竹内 宏昌
    1991 年 63 巻 3 号 p. 245-249
    発行日: 1991/03/25
    公開日: 2011/07/08
    DOIhttps://doi.org/10.11279/imono.63.3_245
    ジャーナル フリー
    抄録を表示する抄録を非表示にする
      Cast structure, hardness, damping capacity and corrosion resistance of Mg-0.5∼10 % Ca alloys and Mg-1∼20 % Li-0.5∼5 % Ca alloys were investigated. The secondary arm spacing of the Mg-0.5∼10 % Ca alloys decreased from 18μm to 15μm with increasing Ca content, whereas Rockwell hardness increased up to HRH 98. Mg-3 % Ca alloy showed the highest damping capacity value of 2.6×10-2.
      The secondary arm spacing of the Mg-Li-Ca alloys decreased more than that of Mg-Ca or Mg-Li alloys with increasing Ca content. Rockwell hardness of the ternary alloy also increased as Mg-Ca alloys. However damping capacity of those alloys decreased with increasing Ca content.
      The corrosion resistance of Mg-0.5 % Ca or Mg-1∼14 % Li alloys in 0.5 % NaCl solution was comparable to the commercial magnesium alloys, but the corrosion resistance of binary alloys with more than 1 % Ca or 16 % Li were considerably inferior.
    抄録全体を表示
    PDF形式でダウンロード (618K)
解説
技術報告
    • |<
    • <
    • 1
    • >
    • >|
feedback
 Top