treatment time of ultrasonic 超声波处理时间
In this study, the effect of ultrasonic treatment time on crystallization structure of industry pure aluminum ingots was investigated.
研究了超声波处理时间对工业纯铝铸锭结晶组织的影响，即添加除气剂又进行超声波处理的情况。
In this study, the effect of ultrasonic treatment time on crystallization structure of industry pure aluminum ingots was investigated. e. g. : with degasser and ultrasonic.
前言：研究了超声波处理时间对工业纯铝铸锭结晶组织的影响，即添加除气剂又进行超声波处理的情况。
The results were attained in the experiments: by using the method of ultrasonic with optimum ultrasonic treatment time, the grain refinement rate of industry pure aluminum ingot is increase obviously.
研究结果表明，采用合适的超声波处理时间，可以提高工业纯铝铸锭的细化率。
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