不等厚度锥体与筒体优角对接焊缝的多分区TOFD检测方法

The method of multi-zone TOFD detection of unequal thickness cone and cylinder reflex angle butt weld

压力容器设备制造过程中,许多特殊对接焊缝结构难以使用常规的TOFD检测工艺对其进行体积性检测。针对一种不等厚度锥体与筒体优角对接环焊缝的TOFD检测进行分析研究,从TOFD基础理论、特殊试块设计制作、TOFD扫描计划编制、检测验证以及最终检测结果进行了介绍,结果表明,该检测方法可应用于工程实践。

In the manufacturing process of pressure vessel equipments,there are many special butt welds structures,some of which are difficult to use the conventional TOFD(Time of flight diffraction)detection process for volume detection.In this paper,the TOFD test for the butt girth weld between cone and cylinder with different thickness was analyzed and studied.The whole process was introduced from the basic theory of TOFD,the design and manufacture of special block,the preparation of TOFD scan plan,the test verification and the analysis of the final test results.The results were satisfactory and can be applied to engineering practice.