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 Wysłany: Czw 14:41, 13 Sty 2011 Temat postu: Moncler jacken Weld eddy current testing technolog |
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Weld eddy current testing technology
Are subject to different magnitude of the shock load cycles, to a certain number of times and repeated shock loads and corrosion under climate change, likely to cause metal fatigue, the incentive for the formation of industrial accidents, so their detection can not be almost as. 3.4 Theme Park theme park amusement ride amusement ride subject to various periodic load and shock, likely to cause metal fatigue in the weld force are more likely to fracture. Temperate and tropical theme park to be open all year round, because of its fast and reliable eddy current inspection has become the best choice, whether or not to automatically scan, in-service testing has become the new trend of non-destructive testing, reduce manpower and time to reduce maintenance costs and improve quality. Looking 4 eddy current weld inspection with electronic technology, eddy current technology and the integration of computer technology, the new eddy current device has a multi-functional, multi-purpose, small size, light weight, portable and easy to move, easy to use and so on. Ferromagnetic eddy current weld inspection use smart portable device,[link widoczny dla zalogowanych], equipped with special sensors, which can effectively inhibit the lift-off effect, inhibition of the weld heat affected zone and the rough surface of the formation of solder interference signal, get a clear, stable and reliable detection of signals. Eddy current method can detect the metal surface,[link widoczny dla zalogowanych], subsurface defects, non-metallic weld surface coating thickness can be detected even more than 2ram, and in fact the general steel paint coating thickness of only 0.3 ~ O. 4mm. Moreover, in the wet, wind, light or 111111 (Continued from page 92) should be immediately removed from oven, be careful not to miss, so drying time is too long lead to penetration testing sensitivity. References: [1] Chinese Mechanical Engineering Society of Nondestructive Testing Branch Code. Penetration testing [M]. North 98 * can also be detected in the water. In contrast,[link widoczny dla zalogowanych], eddy current testing cost is not high, no to paint, and the detection speed. If coupled with automated auxiliary equipment, will further improve the detection speed and efficiency, and can reach the detection of some of the more dangerous position,[link widoczny dla zalogowanych], reducing the risk of testing personnel. It is worth noting that, although the new eddy current method has many advantages, but the inspectors have a higher level of technology requirements. Ferromagnetic materials on the surface eddy current method detection sensitivity is high, while the penetration depth is very shallow, testing different materials require different standard test block, when necessary, use a specific frequency range and the corresponding probe for detection. In addition, the crack below the surface of ferromagnetic materials can not be detected. In addition, the lift-off effect, the end effects, edge effects and side effects such as the detection angle of the signal is still a certain influence on the dirty, too rough, rugged and difficult to weld the surface of tumor detection, testing personnel must carefully distinguish patient. Engineering, to the minimum detectable crack depth, as the condition may be, generally in the 0.5 ~ 2mm. Despite the current testing method has some limitations, but that is by far the most effective non-removal of the coating method for weld inspection in service, has been widely used in Europe, and developed an appropriate standard BS (EN) 1711:2000 L3j . The world's major classification societies have endorsed this approach, such as Lloyd's Register, the United States and Norway Classification Society. I firmly believe that, with the eddy current testing technology continues to depth, the innovation of new equipment and sensors, the device sensitivity and reliability will continue to improve, to better meet the site requirements. Meanwhile,[link widoczny dla zalogowanych], the multi-information fusion technology applications (such as the combination of metal magnetic memory testing technique MMMT), will further enhance the results of the electromagnetic Weld confidence. At present, the industry standard for the methodology are in the pipeline is expected to be developed in the near future and enacted. References: [13 of Jilin, Linjun Ming, GAO Chun-law. Electromagnetic detection of [M]. Beijing: Mechanical Industry Press, 2000. [2] Lin Junming, Zhang Kailiang, Linfa Bing, et al. Rapid detection and weld crack depth measurement I-A]. Non-destructive testing of the Eighth National Conference and International Symposium NDT Proceedings [M / CD]. Suzhou: 2003. [3] BS (EN) 1711:2000, Non-DestructiveExaminationofWelds: EddyCurrentExaminationofWeldyCom-plexPlaneAnalysis [s]. 11111111111 Beijing: Mechanical Industry Press, 1986. [2] HB/Z61 ~ 1998, penetration test [s]. [3] American Society for Nondestructive Testing Programme, the United States Commission on translation of non-destructive testing manual proofreader. Nondestructive Testing Handbook Volume penetration of the United States [M]. Shanghai: World Publishing Company, 1994.
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