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Quality Measurement Techniques for Hot-rolling Rolls

机译:热轧卷的质量测量技术

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This paper describes state-of-the-art nondestructive testing techniques developed at JFE steel for the hot-rolling of steel sheets. The following are reported: (1) A technique for high-resolution ultrasonic detection of internal flaws in deep positions through a combination of focused beam testing and a synthetic aperture method; (2) A technique for detecting surface flaws with a high signal-to-noise ratio using a newly developed broad-bandwidth surface wave probe; (3) An intelligible display technique for mapping the flaws detected in the surface testing. The development of these techniques has made it possible to thoroughly evaluate the soundness of work-rolls. The techniques are now being applied to actual production processes to maintain a high surface quality for sheet steel and to prevent work-roll troubles caused by internal flaws and surface flaws.
机译:本文介绍了JFE钢开发的用于钢板热轧的最新无损检测技术。报告如下:(1)通过聚焦光束测试和合成孔径方法相结合的高分辨率超声检测深处内部缺陷的技术; (2)使用新开发的宽带表面波探头以高信噪比检测表面缺陷的技术; (3)一种可理解的显示技术,用于映射在表面测试中检测到的缺陷。这些技术的发展使得有可能彻底评估工作辊的可靠性。该技术现已应用于实际生产过程中,以保持钢板的高质量表面质量,并防止内部缺陷和表面缺陷引起的工作辊故障。

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