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白剛玉是精密鑄造砂嗎

發布時間:2021-06-04

??? 白剛玉是以優質鋁氧化粉為原料,經電熔提煉結晶而成,具有韌性稍低,純度高、自銳性好、磨削能力強、發熱量小、效率高、耐酸堿腐蝕、耐高溫熱穩定性好。那么白剛玉是精密鑄造砂嗎?河南四成白剛玉廠家小編為您解答。

??? 篩分后的白剛玉根據粒度大小的不同,可用于研磨拋光、可用于固結磨具的制作、可用作耐火材料、也可用作食品添加劑,當然也可用于精密鑄造,白剛玉有時甚至會被稱為精度鑄造專用砂。


白剛玉是精密鑄造砂嗎


??? 精密鑄造用砂用白剛玉的幾個優點:

??? 1、白剛玉參與制作的殼型,其熱化學性能而穩定,流動性也高,且不會出現起層的問題;

??? 2、白剛玉強度高、低發氣、膨脹系數低,高溫條件下不會膨脹開裂;

??? 3、白剛玉砂本身耐高溫,用其鑄造不僅脫模性好,抗粘砂性能也很好,且殼層不會脫殼、固化的速度也很快。

??? 4、用白剛玉進行鑄造,其渙散性好,鑄件表面無論是光潔度還是平整度都能達到要求;

??? 白剛玉在精密鑄造方面的應用還是很廣的,是合金鑄件、芯面砂、涂料等常用的熔模鑄造制殼材料,在一定程度上甚至能夠取代鋯英砂的存在。

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