Advancing Steel Cleanliness Evaluation through High-Frequency Ultrasonic Measurement and Its Future Prospects

Products/R&D

2025/07/11

To assess steel cleanliness—the degree to which impurities are absent—we have established a high-frequency ultrasonic evaluation method in addition to conventional microscopic observation.
By using this ultrasonic flaw detector, minute non-metallic inclusions (impurities) inside the steel can be detected over a wider area and in a shorter time than before. Consequently, steel quality can now be judged with greater accuracy.

The technique is currently applied to in-house steel inspections, contributing significantly to quality improvement. Looking ahead, we plan to extend its use to high-strength materials such as spring steel and to accelerate product development by enabling rapid quality evaluations from the earliest stages of R&D.

⇒Equipment overview: Mitsubishi Steel Technical Review, Vol. 37, 2023 (see pp. 71–72)
https://www.mitsubishisteel.co.jp/product/research-development-center/pdf/G2023_vol37.pdf