Research of Scanning Acoustic Microscope Thickness Measurement Method for Zirconium Alloy Multilayered Composite Material
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摘要: 锆合金多层复合材料采用多层结构,最外层为锆合金包壳,厚度约为0.3～0.6 mm,中间层为某种金属粉末的轧制物。轧制工艺需要精确测量各复合层在轧制后的厚度以对轧制过程进行质量控制;常规超声波测厚技术由于灵敏度和分辨率的限制无法满足包壳测厚要求。本文提出将超声扫描显微(SAM)测厚技术用于锆合金包壳的厚度测量,并对其测厚机理进行理论分析,开展SAM测厚技术的实验验证。结果表明,采用SAM技术可以有效对厚度约为0.3～0.6 mm的锆合金多层复合材料包壳进行厚度测量。Abstract: The zirconium cladding material is a kind of multilayer structure. The outer layer is zirconium alloy cladding and the middle layer is some kind of metal powder rolling products. The thickness of the zirconium cladding is about 0.3mm to 0.6mm. To satisfy the quality control requirement of the rolling technology, accurate thickness of the compound layer needs to be measured. The traditional ultrasonic thickness measurement method can not meet the requirements because of its poor sensitivity and resolution ratio. In this paper, SAM thickness measurement technology is used to measure the thickness of the zirconium cladding, and the thickness mechanism is analyzed theoretically. The experimental verification is carried out. The experiment shows that SAM is available for the thickness measurement of the cladding with thickness of 0.3mm to 0.6mm.
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