Casting Blanks Cleanliness Evaluation Based on Ultrasonic Microscopy and Morphological Filtering
| Autor: | Min Li, Heng Ding, Qingting Qian, Xue Li, Zhu Wang |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
lcsh:TN1-997
Microscope Materials science morphological filtering Acoustics 0211 other engineering and technologies 02 engineering and technology 01 natural sciences law.invention Background noise law 0103 physical sciences Microscopy General Materials Science ultrasound signal processing Anisotropy 010301 acoustics lcsh:Mining engineering. Metallurgy 021102 mining & metallurgy ultrasonic microscopy Metals and Alloys Process (computing) Refraction casting blanks cleanliness evaluation Casting (metalworking) Ultrasonic sensor |
| Zdroj: | Metals, Vol 10, Iss 796, p 796 (2020) Metals Volume 10 Issue 6 |
| ISSN: | 2075-4701 |
| DOI: | 10.3390/met10060796 |
| Popis: | The cleanliness of the casting blanks could seriously affect the quality of downstream products. Recently, ultrasound technology has been introduced to detect the inclusions in metal materials. However, due to the anisotropy of the material crystal, the ultrasonic wave has the characteristics of multiple scattering and refraction in its propagation process. This makes it difficult to evaluate the casting blanks cleanliness effectively, for the inclusion echoes are submerged in the background noise. Therefore, the ultrasonic microscope is innovatively proposed to carry out efficient scanning on the casting blanks. In the meantime, the morphological filtering algorithm has the advantages of fewer parameters and faster calculation speed which can be used to increase the signal-to-noise ratio of ultrasound images and extract the defect features more efficiently. In order to verify the effectiveness of the proposed method, specimens were taken from three strands of continuous caster for detection and analysis. The experimental results show that the second strand has the best quality and the cleanliness is 2.2/mm3, which is obviously better than the other two strands. This method will provide a new technology for the quantitative evaluation of the internal quality of the casting blanks. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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