Abstract
Auger electron spectroscopy (AES) was used to investigate the grain boundary segregation of arsenic and nitrogen in a kind of microalloyed steel produced by a compact strip production (CSP) technology at 950 to 1100°C, which are similar to the hot working temperature of the steel on a CSP production line. It was discovered that arsenic segregated on grain boundaries when the steel was annealed at 950°C for 2 h. When the annealing temperature increased to 1100°C, arsenic was also found to have segregated on grain boundaries in the early annealing stage, for instance, within the first 5 min annealing time. However, if the holding time of the steel at this temperature increased to 2 h, arsenic diffused away from grain boundaries into the matrix again. Nitrogen was not found to have segregated on grain boundaries when the steel was annealed at a relatively low temperature, such as 950°C. But when the annealing temperature increased to 1100°C, nitrogen was detected to have segregated at grain boundaries in the steel.
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This work was financially supported by the National Natural Science Foundation of China (No.50874083) and the Foundation of Hubei Educational Committee (No.Q20091110).
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Zhu, Yz., Zhu, Z. & Xu, Jp. Grain boundary segregation of minor arsenic and nitrogen at elevated temperatures in a microalloyed steel. Int J Miner Metall Mater 19, 399–403 (2012). https://doi.org/10.1007/s12613-012-0570-x
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DOI: https://doi.org/10.1007/s12613-012-0570-x