Grain boundary segregation of minor arsenic and nitrogen at elevated temperatures in a microalloyed steel |
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| Authors: | Yuan-zhi Zhu Zhe Zhu Jian-ping Xu |
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| Affiliation: | 1.The Key Laboratory of the Ministry of Education of China for Ferrous Metallurgy and Resources Utilization,Wuhan University of Science and Technology,Wuhan,China;2.School of Materials and Metallurgy,Wuhan University of Science and Technology,Wuhan,China |
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| 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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