| Dissolving of Nb and Ti carbonitride precipitates in microalloyed steels |
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| 作者单位： | Wenjin Nie，Shanwu Yang，Shaoqiang Yuan，and Xinlai He
Materials Science and Engineering School，University of Science and Technology Beijing，Beijing 100083，China |
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| 基金项目： | 国家重点基础研究发展计划(973计划) |
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| 摘 要： | The dissolving behaviour of Nb and Ti carbonitride precipitates in microalloyed steels during isothermal holding at 1300℃ was investigated by Transmission electron microscopy (TEM) and energy dispersion x-ray spectrum (EDX). It was found that all precipitates in Nb-Ti microalloyed steel are (Nb, Ti)(C, N). With holding time increasing, the atomic ratio of Nb/Ti in precipitates decrease gradually. These precipitates still existe even after holding for 48 h at 1300℃while Nb(C, N) precipitates dissolve away in Nb microalloyed steel only after 4 h at the same temperature. These results show that formation and thermostability of precipitates are considerably influenced by interaction between Nb and Ti.
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Dissolving of Nb and Ti carbonitride precipitates in microalloyed steels |
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| Authors: | Wenjin Nie Shanwu Yang Shaoqiang Yuan Xinlai He |
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| Abstract: | The dissolving behaviour of Nb and Ti carbonitride precipitates in microalloyed steels during isothermal holding at 1300℃ was investigated by Transmission electron microscopy (TEM) and energy dispersion x-ray spectrum (EDX). It was found that all precipitates in Nb-Ti microalloyed steel are (Nb, Ti)(C,N). With holding time increasing, the atomic ratio of Nb/Ti in precipitates decrease gradually. These precipitates still existe even after holding for 48 h at 1300℃ while Nb(C,N) precipitates dissolve away in Nb microalloyed steel only after 4 h at the same temperature. These results show that formation and thermostability of precipitates are considerably influenced by interaction between Nb and Ti. |
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| Keywords: | dissolving (Nb Ti)(C N) TEM EDX |
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