双层嵌套对接焊缝TOFD与相控阵超声技术应用方法研究
赖传理,谭云华
(东方电气集团 东方锅炉股份有限公司,四川 自贡 643001)
摘要:在压力容器制造中,部分容器筒体常采用双层嵌套结构,可有效增加其受力安全性。双层嵌套对接焊缝一般采用脉冲反射法超声波技术和射线检测技术,但一直存在止裂焊缝附近缺陷难以分辨的问题。TOFD和相控阵为近年来快速发展应用的超声检测新技术,针对某双层嵌套对接焊缝结构,制定了TOFD、相控阵超声检测工艺,进行了新技术和常规方法的对比检测,并进行了缺陷解剖,充分显示了TOFD和相控阵技术对该结构的检测优势和有效性,对类似结构焊缝采用TOFD和相控阵超声检测提供了较好的参考价值。
关键词:双层嵌套焊缝;TOFD;相控阵;S扫查;E扫查
中图分类号:TB551          文献标志码:A            文章编号:1006-0316 (2013) 10-0011-04
Research of TOFD and PA examination methods for two-double butt weld
LAI Chuan-li,TAN Yun-hua
( Dong Fang Boiler Group Co. Ltd., Dongfang Electric Corporation, Zigong 643001, China )
Abstract:Two-double butt welds are applied to some special pressure vessel, it is propitious to increasing security. Pulse echo method and radiographic examination are usually to be used to examine two-double butt welds, but it is difficult to identify defect near pontes. TOFD and PA have many particular advantages, this article put forward the method of testing Two-double butt welds using TOFD and PA. The results of testing and dissecting shows the method is very effectual for Two-double butt welds.
Key words:two-double butt welds;TOFD;PA;S-scan;E-scan

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收稿日期:2012-11-12
作者简介:赖传理(1963-),四川自贡人,本科,工程师,主要从事无损检测技术和管理工作。
 

 

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