Effect of electropulsing treatment on the mechanical properties of Q235 steel strip

The elctropulsing treatment (EPT) has been successfully applied to the processing of a low carbon Q235 steel strip. Comparing with the conventional heat treatment (CHT), a proper EPT is capable of achieving the similar or even better effect on the mechanical properties of the steel strip. It was fou...

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Bibliographic Details
Published in:Steel in translation 2013-06, Vol.43 (6), p.344-347
Main Authors: Chen, Suwen, Tang, Guoyi, Song, Shenhua, Song, Guolin, Gromov, V. E.
Format: Article
Language:English
Subjects:
Carbon
Chemistry and Materials Science
Cold rolling
Electric potential
Killed steels
Materials Science
Mechanical properties
Recrystallization
Steels
Strip steel
Vanadium
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Summary:The elctropulsing treatment (EPT) has been successfully applied to the processing of a low carbon Q235 steel strip. Comparing with the conventional heat treatment (CHT), a proper EPT is capable of achieving the similar or even better effect on the mechanical properties of the steel strip. It was found that the optimum combination of the EPT parameters are 180 V in voltage and 500 Hz in frequency (180 V-500 Hz) leading to a combination of tensile strength-elongation of 371 MPa-47.5%. Optical microscopy analyses indicates that the EPT/180 V-500 Hz for Q235 steel strip can accelerate the formation of the completely recrystallized microstructure in which the grain size become relatively finer and more uniform compared to the elongated one formed in the cold-rolled sample. Such phenomenon is consistent with the improvement of the mechanical performance of the Q235 steel sample under the EPT. However, the EPT with inadequate frequency can only result in partial recrystallization of the grains, while the one with an exceed frequency may lead to the apparent grain growth within the sample. Both cases can not produce satisfactory combination of strength and ductility for the steel samples.
ISSN:0967-0912
1935-0988
DOI:10.3103/S0967091213060041