Effect of High Current Density Electropulsing on the Microstructure of Later-Serviced High Manganese Steel Crossing

Chin J Mater Res

2011, Vol. 25

Issue (4): 342-346 DOI:

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Effect of High Current Density Electropulsing on the Microstructure of Later-Serviced High Manganese Steel Crossing

YANG Zhinan, ZHANG Ming, ZHANG Fucheng, FENG Xiaoyong

State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004

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YANG Zhinan ZHANG Ming ZHANG Fucheng FENG Xiaoyong. Effect of High Current Density Electropulsing on the Microstructure of Later-Serviced High Manganese Steel Crossing. Chin J Mater Res, 2011, 25(4): 342-346.

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Abstract A kind of high current density electropulsing treatment was carried out on the surface of later-serviced high manganese steel crossing. The results show that specimen finished recrystallization at a relatively low temperature of 786 K, the recrystallization grain size of 29.3 μm was much finer than that of the specimen before treatment, and the microhardness decreased remarkably after treatment by high current density electropulsing. Electropulsing enhanced the recrystallization nucleation rate of the specimen which resulted in recrystallization being finished at low temperature rapidly. Enhancement of the nucleation rate mainly resulted from the increase in mobility of dislocationdiffusion ability of atoms and the frequency of the atoms. The fatigue life of high manganese steel was improved notably after treatment by high current density electropulsing.

Key words: metallic materials recrystallization electropulsing high manganese steel crossing

Received: 10 August 2010

ZTFLH:

TG142

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Supported by National Science Foundation for Distinguished Young Scholars No.50925522, National Natural Science Foundation of China No.50871094, Foundation for Innovative Research Groups of the National Science Foundation of China No.50821001, Excellent Youth Foundation of Hebei Province Scientific Committee No. E2009001632, and National Basic Research Program of China No.2010CB731606.

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https://www.cjmr.org/EN/ OR https://www.cjmr.org/EN/Y2011/V25/I4/342

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