利用超声波在线检测液态金属洁净度的模拟研究

通过水模型实验研究了利用超声波在线检测液态金属中夹杂物的可能性。首先考察和比较了不同性质的夹杂物对超声波传播规律的影响,发现当溶液中存在夹杂物时超声波声压减小,超声波的波形也发生明显变化,而且不同性质的夹杂物对超声波的影响也存在较大差异。进一步考察夹杂物浓度和粒径对超声波传播的影响,发现随着夹杂物浓度的增加和粒径的增大,超声波声压逐渐减小,而且声压对上述因素的微小变化反应灵敏。研究表明,利用超声波在线检测液态金属洁净度是可能的。

Model study on in-situ detection of inclusion in liquid metal by ultrasonic waves

The possibility of using ultrasonic waves to in-situ detect the inclusions in liquid metals is researched by a water model. The effects of inclusions with different properties on ultrasonic waves propagating through water are examined and compared. It is found that the intensity of ultrasonic waves decreased and the wave pattern also changed obviously when there were inclusions in the solution. Furthermore, the changes mentioned above for different inclusions were not similar. The influences of concentrations and particle sizes of inclusions on the diffusing of waves are also studied. The detected pressure of the ultrasonic waves became smaller with the increasing of the inclusion concentration and particle sizes,and the fluctuations of the waves were sensitive to the changes of the above two factors. From the experiment results, it can be concluded that acoustic waves can be used to detect the inclusions in liquid metal directly.