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共振式超声波测厚最大特点是可以进行单面测量、准确度高、经济。这些特点使得它已成为现代工业生产部门与维修部门工作中一种重要的检查工具。以前,厚度测量大都是采用钻孔方法进行机械测量的,这种检测方法是破坏性的,时间长、不经济、而且不精确,因为材料背面污垢层的厚度亦被计算入厚度值内,而超声波共振式厚度仪所测出的是不包括背面污垢层在内的厚度。在设备维修工作中,有两种基本的超声检验方法,脉冲反射法和共振法,前者主要用来测厚,尤其是高温设备的壁厚和检查应力腐蚀破裂、晶间腐蚀与高温氢脆等。后者主要用来检测腐蚀后设备的剩余壁厚与腐蚀率。现就有关共振式超声测厚仪的制造与使用作一简单介绍。
Resonance ultrasonic thickness measurement is the biggest characteristic of single-sided measurement, high accuracy and economy. These characteristics make it an important inspection tool in the work of modern industrial production and maintenance departments. In the past, thickness measurements were mostly mechanical measurements using drilling methods that were destructive, long-lasting, uneconomical, and inaccurate because the thickness of the fouling layer on the back of the material was also calculated into the thickness value and Ultrasonic resonance thickness measured by the instrument does not include the back of the dirt layer thickness. In the equipment maintenance work, there are two basic ultrasonic testing methods, pulse reflection method and resonance method. The former is mainly used to measure the thickness, especially the wall thickness of the high temperature equipment and check the stress corrosion cracking, intergranular corrosion and high temperature hydrogen embrittlement . The latter is mainly used to detect the residual wall thickness and corrosion rate of the equipment after corrosion. Now on the resonant ultrasonic thickness of the manufacture and use for a brief introduction.