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Development of water simulation system for ultrasonic detection of inclusions in molten metals.

机译：开发用于超声波检测熔融金属中夹杂物的水模拟系统。

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摘要

In metal processing, metal cleanliness is a crucial process parameter for product manufacturing and recycling and, therefore, on-line ultrasonic methods to evaluate the cleanliness of molten metals are highly desired. In order to establish a procedure and to investigate the optimum system configurations, a water simulation system of ultrasonic detection has been constructed in this thesis. Measuring the concentrations, counting the numbers and measuring the size distributions of the polyvinyl chloride (PVC) particles in water is performed with the ultrasonic pitch-catch configuration. Ultrasonic signals scattered by the particles are detected and the single particle movement is successfully identified. This study verifies that the water simulation system can be employed to evaluate the cleanliness in water.; Ultrasonic probes directly associated to the system sensitivity are crucial for ultrasonic techniques. In this thesis, several materials and shapes of metallic buffer rods are investigated experimentally using an ultrasonic longitudinal wave transducer (UT). Furthermore, the ultrasonic wave patterns of different cross-section shapes of rods are investigated by scanning a small ball bearing immersed in water with pitch-catch mode. Finally, evaluation and recommendations for the application of these high performance metallic buffer rods is presented in this thesis.
机译：在金属加工中，金属清洁度是产品制造和回收的关键工艺参数，因此，非常需要在线超声方法来评估熔融金属的清洁度。为了建立程序并研究最佳的系统配置，本文构建了超声检测水模拟系统。使用超声波沥青捕集器配置可以测量水中的浓度，计算数量并测量水中聚氯乙烯（PVC）颗粒的尺寸分布。检测由粒子散射的超声波信号，并成功识别单个粒子的运动。该研究验证了水模拟系统可用于评估水中的清洁度。与系统灵敏度直接相关的超声波探头对于超声波技术至关重要。本文利用超声纵波换能器对金属缓冲棒的几种材料和形状进行了实验研究。此外，通过以节距捕获模式扫描浸没在水中的小滚珠轴承，研究了不同截面形状的棒的超声波模式。最后，本文对这些高性能金属缓冲棒的应用进行了评价和提出建议。

著录项

  • 作者

    Zhang, Yuanbei.;

  • 作者单位

    Concordia University (Canada).;

  • 授予单位 Concordia University (Canada).;
  • 学科 Engineering Mechanical.; Engineering Metallurgy.
  • 学位 M.A.Sc.
  • 年度 2003
  • 页码 106 p.
  • 总页数 106
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 机械、仪表工业;冶金工业;
  • 关键词

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