On-Line Monitoring of Liquid Metal Quality by Focused Ultrasound

聚焦超声波在线监测液态金属质量

• 批准号: 12555207
• 负责人: IHARA Ikuo
• 金额: $ 4.1万
• 依托单位: Nagaoka University of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12555207/
• 关键词: Ultrasound; Molten metal; On-line monitoring; Cleanliness; Inclusion; High temperature sensor; Numerical simulation; Focused ultrasound; 波動伝播シミュレーション

A high performance ultrasonic sensor that provides a high spatial resolution measurement in high temperature environments has been developed in order to make an on-line monitoring of molten metal quality. Several experiments have been carried out using the developed focused sensors at 10 MHz in a pulse echo mode to investigate the performance of the developed monitoring system. Molten zinc, aluminum, and magnesium were used in the experiments. The main results obtained are the following:(1) It has been shown that a numerical simulation technique with a finite difference method is a very useful tool for better designing high performance ultrasonic sensors with a clad buffer rod. Using such simulation, focused ultrasonic sensors having excellent wave guidance ability with high signal to noise ratio have been successfully developed.(2) Laboratory validation of the use of focused ultrasonic sensors for inclusion particle detection in molten aluminum at 800 ℃ as well as molten zinc at 650 ℃ has been demonstrated. Back-scattered signals from particles in both molten metals are clearly visible at the focal region of the lens.It is therefore considered that the developed ultrasonic technique is a promising candidate for on-line monitoring during molten metal processing.

为了实现金属熔体质量的在线监测，研制了一种在高温环境下提供高空间分辨率测量的高性能超声波传感器。利用研制的聚焦传感器在10 MHz的脉冲回波模式下进行了多次实验，以考察所研制的监测系统的性能。实验中使用了熔融的锌、铝和镁。主要研究结果如下：(1)研究表明，有限差分数值模拟技术是设计高性能复合式缓冲杆超声传感器的有效工具。利用这种模拟方法，成功地研制出具有良好波导性和高信噪比的聚焦超声传感器。(2)在实验室验证了聚焦超声传感器用于800℃铝熔体和650℃锌熔体中夹杂物颗粒检测的有效性。两种金属熔体中颗粒的背向散射信号在透镜焦区清晰可见，因此认为所开发的超声技术是一种很有前途的在线监测金属熔体加工过程的方法。

项目成果

I. Ihara, H. Aso, Y. Dikky Burhan, C.-K. Jen, S. Kamado, and Y. Kojima: "Particle Detection in Liquid Metals using Focused Ultrasonic Probes"The 6th Far-East Conference on Non-Destructive Testing (FENDT 2002), in conjunction with The 50th Anniversary Conf

I. Ihara、H. Aso、Y. Dikky Burhan、C.-K。

I.IHARA, C-K.JEN, D.RAMOSFRANCA: "Materials Evaluations in Molten Metal Using a Focused Ultrasonic Sensors : Application to Molten Zinc"Advances in Technology of Materials and Materials Processing Journal. 3. 45-50 (2001)

I.IHARA、C-K.JEN、D.RAMOSFRANCA：“使用聚焦超声波传感器对熔融金属进行材料评估：在熔融锌中的应用”材料技术进展和材料加工杂志。

I.Ihara, Y.Dikky Burhan, S.Kamado, H.Aso, Y.Kojima: "On-line Monitoring of Liquid Magnesium using a High Temperature Ultrasonic Probe"2nd International Conference on Platform Science and Technology for Advanced Magnesium Alloys ( PSTAM2003 ), Osaka. (2003

I.Ihara、Y.Dikky Burhan、S.Kamado、H.Aso、Y.Kojima：“使用高温超声波探头在线监测液态镁”第二届先进镁合金平台科学与技术国际会议（PSTAM2003）

I. Ihara, Y. Dikky Burhan, S. Kamado, H. Aso, and Y. Kojima: "On-line Monitoring of Liquid Magnesium using a High Temperature Ultrasonic Probe"2nd Innternational Conference on Platform Science and Technology for Advanced Magnesium Alloys (PSTAM 2003), Osa

I. Ihara、Y. Dikky Burhan、S. Kamado、H. Aso 和 Y. Kojima：“使用高温超声波探头在线监测液态镁”第二届先进镁合金平台科学与技术国际会议（

C-K.JEN, D.R.FRANCA, Z.SUN, I.IHARA: "Clad Polymer Buffer Rods for Polymer Process Monitoring"Ultrasonics. 39・2. 81-89 (2001)

C-K.JEN、D.R.FRANCA、Z.SUN、I.IHARA：“用于聚合物过程监控的包覆聚合物缓冲棒”超声波 39・2。