Light Metals 2013
Light Metals 2013
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2013年轻金属
DOI：
10.1002/9781118663189.ch162
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
Alba-Baena N
中科院分区：
文献类型：
--
作者：
Alba-Baena N
超声波处理是一种有效的铝熔体除气方法，具有经济、环保等优点。超声波脱气的根本原因是溶解的氢在气泡脉动的帮助下扩散到空化气泡中，随后从熔体中排出。本文研究了铸造铝硅合金超声除气动力学。通过空化气泡的产生、通过声流的熔体搅拌和气泡到熔体表面的浮选的相互作用来研究动力学。采用Foseco ALSPEK-H探针直接测量熔体中的氢浓度，沿着减压试验。使用短的超声处理时间的可能性进行了讨论。
Ultrasonic processing was shown to be an efficient means of aluminum melt degassing with benefits of being economical and environment friendly. The fundamental reason for ultrasonic degassing is known to be diffusion of dissolved hydrogen to cavitation bubbles assisted by their pulsation, and their subsequent evacuation from the melt. This paper reports on the kinetics of ultrasonic degassing of an Al-Si casting alloy. The kinetics is studied through interplay of cavitation bubble generation, melt agitation through acoustic streaming, and flotation of gas bubbles to the surface of the melt. Direct measurements of hydrogen concentration in the melt by Foseco ALSPEK-H probe are used along with a reduced-pressure test. The possibility of using short sonication times is discussed.