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熔模精密鑄造加工中避免粘砂的五點
來源: | 作者:hkw935742 | 發布時間: 2014-03-26 | 658 次瀏覽 | 分享到:

   1)要正確選擇型殼耐火材料。做高錳鋼和高合金鋼鑄件時,型殼面層應使用中性耐火材料,如電熔剛玉等。

   2)面層制殼耐火材料要純,有害雜質含量不應超過允許范圍。

   3)合金在熔煉及澆注時,應盡可能避免氧化并充分脫氧,去除金屬液中的氧化物。

   4)在可能條件下,適當降低金屬液澆注溫度。

   5)改善型殼散熱條件,防止局部過熱。

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