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通过小型铝合金熔体的脱氢实验,研究了旋转喷枪微气泡净化法的脱氢规律。实验表明旋转喷枪转速、氩气流量、净化处理时间和喷枪埋入深度是影响铝合金熔体脱氢效果的主要因素。在铝合金熔体微气泡法处理时,存在一个最佳的氩气流量.氩气流量偏离这个最佳值对脱氢不利。随着旋转喷枪转速的增加,铝合金熔体的脱氢率也随之增加,并且逐步趋于平缓.净化处理时间超长,喷枪埋入熔体内越深,对脱氢越有利。获得理想的脱氢效果必须几个因素相互协调。在实验过程中,已经能够在10分钟内将铝合金熔体中的氢含量从0.32ml/100gAl,降低至0.075ml/100gAl说明铝合金熔体微气泡净化法具有良好的脱氢效果。
Through dehydrogenation experiment of small aluminum alloy melt, the dehydrogenation rule of the rotary spray gun microbubble purification method was studied. Experiments show that the main factors affecting the dehydrogenation effect of aluminum alloy melt are rotating speed of gun, argon flow, purifying time and depth of gun embedding. There is an optimum flow rate of argon gas in the aluminum alloy melt microbubble process, and the deviation of argon flow rate from this optimum value is detrimental to dehydrogenation. With the increase of rotating speed of gun, the dehydrogenation rate of aluminum alloy melt also increases, and gradually tends to be gentle.The purification time is too long, the deeper the gun is buried in the melt, the more favorable to dehydrogenation. There are several factors that must be coordinated to achieve the desired dehydrogenation effect. During the experiment, it has been possible to reduce the hydrogen content in the aluminum alloy melt from 0.32 ml / 100 g Al to 0.075 ml / 100 g Al in 10 minutes to show that the aluminum alloy melt microbubble purification method has a good dehydrogenation effect.