The final microstructure of DP and TRIP assisted steels can evolve after hot working (hot rolling) or during post heat treatment process. In the formation of the final structure a number of different technological parameters have important roles, e.g. end temperature of rolling, cooling rates, temperature of intercritical annealing, etc. As a result of the individual factors and their combinations a lot of product technology routes are feasible. The effect of the different combinations of these technological parameters on the microstructure can be mapped by the special Jominy end-quench test (so called intercritical Jominy end-quench test) described in this paper. Unlike the traditional Jominy test, in this case there is a partial anstenizing between A1 and A3 temperatures which results in a given amount of ferrite in the microstructure before quenching. The method developed can be applied for mapping DP and TRIP assisted steels' microstructure in a wide range of technological parameters. The analysis of measured and calculated data can help us find the technological parameters optimal from the microstructural point of view.
参考文献
| [1] | Girault E et al.Metallographic Methods for Revealing the Multiphase Microstructure of TRIP-Assisted Steels[J].Materials Characterization,1998,40:111-118. |
| [2] | Felde I;Réti T;Kohlhéb R;Buza G Vero B Gergely M.Application of Computer Simulation in Heat Treating of Steels[A].,1999:687-695. |
| [3] | Miettinen J .Austenite decomposition analysis package ADC for steels - User manual of DOS version Report TKK-MK-12[R].Laboratory of Metallurgy, Helsinki University of Technology,1997. |
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