Ultrasonic Nondestructive Testing and Evaluating System for
the Brazing Quality of a Guide Ring

doi:10.1007/s12204-012-1319-4

上海交通大学学报（英文版） ›› 2012, Vol. 17 ›› Issue (5): 527-530.doi: 10.1007/s12204-012-1319-4

Ultrasonic Nondestructive Testing and Evaluating System for the Brazing Quality of a Guide Ring

GAO Shuang-sheng1 (高双胜), CHI Da-zhao2* (迟大钊), GANG Tie2 (刚铁)

(1. School of Material Science and Engineering, Shenyang Aerospace University, Shenyang 110136, China; 2. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China)

出版日期:2012-10-30 发布日期:2012-11-16
通讯作者: CHI Da-zhao2* (迟大钊) E-mail:dzchi@hit.edu.cn

Ultrasonic Nondestructive Testing and Evaluating System for the Brazing Quality of a Guide Ring

GAO Shuang-sheng1 (高双胜), CHI Da-zhao2* (迟大钊), GANG Tie2 (刚铁)

(1. School of Material Science and Engineering, Shenyang Aerospace University, Shenyang 110136, China; 2. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China)

Online:2012-10-30 Published:2012-11-16
Contact: CHI Da-zhao2* (迟大钊) E-mail:dzchi@hit.edu.cn

摘要/Abstract

摘要： The important status of guide ring in large power plants and its manufacturing methods were introduced. The advantages of manufacturing methods including welding and electrolysis were discussed. In order to ensure the brazing quality of the guide ring, ultrasonic nondestructive testing (UNDT) method was used in this study. According to the features of the defects that may show up during brazing, the feasibility and reliability of UNDT were proved in theory. Based on the theory, an ultrasonic C-scan imaging test method was developed using a water immersion focusing probe. According to the features of the inspected images, the defects were segmented using a morphology image processing based method. The defects can be localized and sized by employing the algorithm of area reconstruction. At last, the combination ratio of brazing interface can be calculated and the brazing quality of the guide ring can be evaluated.

关键词: guide ring, braze, ultrasonic testing, image processing

Abstract: The important status of guide ring in large power plants and its manufacturing methods were introduced. The advantages of manufacturing methods including welding and electrolysis were discussed. In order to ensure the brazing quality of the guide ring, ultrasonic nondestructive testing (UNDT) method was used in this study. According to the features of the defects that may show up during brazing, the feasibility and reliability of UNDT were proved in theory. Based on the theory, an ultrasonic C-scan imaging test method was developed using a water immersion focusing probe. According to the features of the inspected images, the defects were segmented using a morphology image processing based method. The defects can be localized and sized by employing the algorithm of area reconstruction. At last, the combination ratio of brazing interface can be calculated and the brazing quality of the guide ring can be evaluated.

Key words: guide ring, braze, ultrasonic testing, image processing

中图分类号:

TG 115.28

GAO Shuang-sheng1 (高双胜), CHI Da-zhao2* (迟大钊), GANG Tie2 (刚铁). Ultrasonic Nondestructive Testing and Evaluating System for the Brazing Quality of a Guide Ring[J]. 上海交通大学学报（英文版）, 2012, 17(5): 527-530.

GAO Shuang-sheng1 (高双胜), CHI Da-zhao2* (迟大钊), GANG Tie2 (刚铁). Ultrasonic Nondestructive Testing and Evaluating System for the Brazing Quality of a Guide Ring[J]. Journal of shanghai Jiaotong University (Science), 2012, 17(5): 527-530.

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Ultrasonic Nondestructive Testing and Evaluating System for the Brazing Quality of a Guide Ring

Ultrasonic Nondestructive Testing and Evaluating System for the Brazing Quality of a Guide Ring

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