Al-Si-Cu系鋳造合金の凝固組織に及ぼすストロンチウム及びTi-B添加と冷却速度の影響

• 姜 孝京

  九州大学大学院

• 宮原 広郁

  同大学工学部　工博

• 大城 桂作

  同大学工学部　工博

書誌事項

タイトル別名

• Effects of Sr, Ti-B and Cooling Rate on Solidification Structures of Al-Si-Cu Cast Alloy
• Al Si Cuケイ チュウゾウ ゴウキン ノ ギョウコ ソシキ ニ オヨボス

抄録

  The effects of cooling rate and addition of Sr and Ti-B on microstructural features such as grain size, dendrite arm spacing, morphologies of eutectic silicon and iron rich compound were investigated for the Al-6.55%Si-2.78%Cu-0.59% Fe-0.38% Mg-0.34%Mn alloy (JIS AC4B). This alloy solidifies in the order of primary α (Al) , α + α-AlFeMnSi eutectic, α + Si eutectic, α + β-AlFeMnSi eutectic, α + Si + Mg₂Si eutectic and α + Si + Al₂Cu eutectic. The grain size, dendrite arm spacing, size of eutectic silicon particles and length of needle-like iron rich compound decrease as the cooling rate increases, and they are in linear relation on the logarithmic scale. The addition of a small amount of Ti-B markedly refines the grain size while practically unaffects the other solidification structures. At the cooling rates of 2.7K/s, 14.4K/s and 108.1K/s, the eutectic silicon crystals fully modify with the addition of Sr more than 60ppm, 13ppm and 5ppm respectively. The addition of Sr and a higher cooling rate tends to increase the formation of chinese script type iron rich compound.

収録刊行物

• 鋳造工学

  鋳造工学 69 (5), 383-390, 1997

  公益社団法人 日本鋳造工学会

キーワード

• Al-Si-Cu cast alloy
• solidification structure
• modification
• Sr
• Ti-B

詳細情報

• CRID: 1390001206506867328
• NII論文ID: 10003800229
• NII書誌ID: AN10514770
• DOI: 10.11279/jfes.69.383
• ISSN: 21855374
• ISSN: 13420429
• NDL書誌ID: 4217017
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4217017
• 本文言語コード: en
• データソース種別:
  • JaLC
  • NDL
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可