| Autor: |
A. Gramlich, C. van der Linde, M. Ackermann, W. Bleck |
| Jazyk: |
angličtina |
| Rok vydání: |
2020 |
| Předmět: |
|
| Zdroj: |
Results in Materials, Vol 8, Iss , Pp 100147- (2020) |
| Druh dokumentu: |
article |
| ISSN: |
2590-048X |
| DOI: |
10.1016/j.rinma.2020.100147 |
| Popis: |
The transformation behavior of medium manganese steels after forging has been characterized using dilatometry in order to investigate the influence of the alloying elements. The alloys contain 4 wt.–% manganese, 0.5 wt.–% silicon, 0.035 wt.–% niobium and varying amounts of carbon (0.15–0.19 wt.–%), aluminum (0.025–0.5 wt.–%), molybdenum (0.02–0.2 wt.–%), titanium (0–0.02 wt.–%), and boron (0–0.06 wt.–%). The continuous cooling transformation (CCT) diagrams and a multiple linear regression (MLR) formula for calculating the martensite start (Ms) temperature is presented. The results are critically compared to a variety of formulae available in the literature. It is demonstrated within this study that molybdenum increases the Ms-temperature, silicon has no mandatory influence on the Ms-temperature and boron not only decreases the Ms-temperature but also increases the critical cooling rate. The new formula enables the precise setting of annealing parameters. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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