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In this study, the effect of processing parameters on instability of the steel (S10C) during the hot bar rolling process was investigated numerically. Plastic work was used for deriving a criterion to judge a surface nonuniform deformation due to the instability. The processing map was formulated based on the instability criterion derived from the plastic work approach and the experimental observations obtained from the hot compression tests. The effects of roll pass geometry and temperature were examined with the help of a parametric study by employing the processing map with three dimensional rigid thermo-viscoplastic finite element analyses based on the plastic work approach proposed in the present investigation. Based on this approach, processing conditions for reducing the instability were determined. According to this investigation, the roll pass design was determined and the initial processing temperature in the hot bar rolling process recommended for reducing flow instability of the process.

목차

Abstract

1. Introduction

2. Experimental

3. FE Analyses

4. Results and discussion

5. Conclusions

Acknowledgement

References



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UCI(KEPA) : I410-ECN-0101-2009-550-016796701