Effect of Vanadium and Strain Rate on Hot Ductility of Low-Carbon Microalloyed Steels
| Autor: | Siying Song, Junyu Tian, Juan Xiao, Lei Fan, Yuebiao Yang, Qinpan Yuan, Xiaolong Gan, Guang Xu |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Metals, Vol 12, Iss 1, p 14 (2021) |
| Druh dokumentu: | article |
| ISSN: | 12010014 2075-4701 |
| DOI: | 10.3390/met12010014 |
| Popis: | Hot tensile tests were conducted in this study to investigate the effect of strain rate (10−3 and 10 s−1) and vanadium content (0.029 and 0.047 wt.%) on the hot ductility of low-carbon microalloyed steels. The results indicate that a hot ductility trough appears at a low strain rate (10−3 s−1) because of the sufficient time for ferrite transformation and the growth of second particles, but it disappears at a high strain rate (10 s−1). The hot ductility is improved with the increase in strain rate at 700 °C or higher temperatures. In addition, with the increase in vanadium content, the large amounts of precipitate and increased ferrite transformation result in poor hot ductility of steels fractured at a low temperature range (600~900 °C). However, when the steel is fractured at a high temperature range (1000~1200 °C), more vanadium in the solid solution in the austenite inhibits the growth of parental austenite grains and results in grain refinement strengthening, slightly improving the hot ductility. |
| Databáze: | Directory of Open Access Journals |
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