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Research the Ultrasonic C-Scan Technique for EBW Seam of Large Force Bearing Structural Component

Author: ZhangLiJun
Tutor: XuYueLan；XuXiangQun
School: Nanjing University of Technology and Engineering
Course: Materials Engineering
Keywords: large force bearing Structural Component EBW( electron beam weld) ultrasonic C-Scan
CLC: TG441.7
Type: Master's thesis
Year: 2009
Downloads: 68
Quote: 1
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Abstract


Based on the project, aim at the develop current of MBTC(main battle tank),infantry combat vehicle,light track combat vehicle and amphibious armored combat vehicle applied the EBW(electron beam welding) technique.Studied the ultrasonic immersion C-Scan testing method of EBW seam of large force bearing Structural Component which is gear wheel of tank and armored car etc,offer academic basis and technique artifice for quality stability in batching produce.During the manufacture of large force bearing Structural Component (e.g. gear wheel) of tank and armored car, the EBW is greatly applied. Defects such as incomplete fusion, partially weld, pore often occur in process, which affects the quality and reliability of parts directly. Based on the test of EBW seam of gear wheel of tank and armored car, We have discussed the feasibility of the method of ultrasonic testing of force bearing Structural Component which is tank and armored car; designed and developed of the ultrasonic immersion C-Scan testing system of EBW seam of force bearing Structural Component which is tank and armored car; carried the ultrasonic immersion C-Scan testing of EBW seam of force bearing Structural Component which is tank and armored car out.By analysis visual C-scan images that the ultrasonic testing system provided, not only the defect identification and location can be realized, but also the defect size measurement can be done with high precision. All the studies and practical inspection we made showed that this ultrasonic testing system is high in sensitivity, efficient in inspection and good in reliability. It is an ideal method to test the EBW seam of gear wheel.Chapter this article the background and the requirements of this project, and the significance of the research of ultrasonic immersion C-Scan testing method used to large force bearing Structural Component which is gear wheel of tank and armored car etc,than states the presently applicated EBW technique,ultrasonic automatic testing technique.ultrasonic C-Scan testing and NDT(Nondestructive Testing) technique of EBW.This article mainly states the basic theory of using ultrasonic C-Scan testing technique to test the EBW seam. After stated the importance of ultrasonic test technique to ensure the quality of welding ling, it analyzed the characteristics of the annular electron beam weld and its flaw distribution. Than based on the ultrasonic test technique, the way of how to test the welding ling with ultrasonic was made out. such as to choose the way of test, ultrasonic imaging and presentation, the style of probe, the couplant. and so on. At last, the theory of automatically adjusting the water path length is put forward, finished plan design of ultrasonic immersion C-Scan testing.Completed the C-scan system design, with a choice of multi-channel ultrasonic detection equipment, mechanical systems, motion control systems, data acquisition systems, software, as well as probes were carried out functions such as the introduction and selection program. Four identified flooding automatic C-scan system program, the largest diameter scanningΦ60mm, weight 200kg.Conducted detection technology to the ultrasonic immersion C-scan and the choice of experimental studies, involving the comparison sample production, scanning the selection of the path, the ultrasonic parameters, and so on. Compared to the use of the sample tube and weld seam ring for specific experimental studies, has been the best detection process parameters, and the parameters of the implementation of ring the ultrasonic immersion C-Scan detection, was satisfied with the results.

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Welding, metal cutting and metal bonding > Welding process > General approach > Welding defects and quality inspection
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