Research on Magnetic Memory Characteristics of 2.25Cr1Mo Steel under Bend Deformation State

Abstract:

This paper has studied the feasibility of detection of bending deformation on hydrogenation reactor based on magnetic memory test. The bend specimens were made of 2.25Cr1Mo steel, which is always used in hydrogenation reactors. Specimens were divided into defect-free specimen, cracks specimen and welding specimen. And then three-point bending tests were done on the material test machine. The magnetic signals were detected by magnetic memory sensors to research different variation of magnetic signals on different bend stage. The ferromagnetic theory was used to explain the variation. It is feasible to preliminarily evaluate the bend state by the magnetic memory signal.

• Periodical: Applied Mechanics and Materials (Volume 151)
• Pages: 250-254
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.151.250
• Online since: January 2012
• Authors: Fei Fei Long, Guo Zhu Gao
• Keywords: Bend Deformation, Magnetic Memory, Steel 2.25Cr1Mo, Three-Point Bending Tests

References

[1] Mao Daxing, Li Pingjin, Quality Control in Supervising the Manufacture of Hydrogenated Reactor, J. Pressure Vessels. 122(2005) 22-25.

[2] Zhang Zhenrong, Zhang Wenhui, Lu Qingchun, Hydrogenation reactor History, J. CFHI Technology. 1(2004) 1-3.

[3] Dubov A A, Diagnostics of metal items and equipment by means of metal magnetic memory, C. Proceedings of CHSNDT 7th Conference on NDT and International Research Symposium. Shantou, China, Non-Destructive Testing Institution , CMES, (1999)181-187.

[4] Shen Gongtian, Wu Yan, Wang Yong, Study on the magnetic memory signals from the welding scar surface cracks of liquefied petroleum gas tank, J. Nondestructive Testing. 26(2004) 349-351.

[5] Dubov A A, Kolkolnikov S M, Quality assurance of welded joints in power, chemical and gas pipeline engineering by the method of metal magnetic memory, J. Welding in the World. 52(2008) 709-714.