Effect of solidification rate on microstructure evolution in dual phase
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Effect of solidification rate on microstructure evolution in dual phase
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received: 16 June 2016 accepted: 04 October 2016 Published: 19 October 2016
Effect of solidification rate on microstructure evolution in dual phase microalloyed steel A. G. Kostryzhev1, C. D. Slater2, O. O. Marenych1 & C. L. Davis2 In steels the dependence of ambient temperature microstructure and mechanical properties on solidification rate is not well reported. In this work we investigate the microstructure and hardness evolution for a low C low Mn NbTi-microalloyed steel solidified in the cooling rate range of 1–50 Cs−1. The maximum strength was obtained at the intermediate solidification rate of 30 Cs−1. This result has been correlated to the microstructure variation with solidification rate. At present, three major concepts to produce strip steel operate in industry: 1 – casting of a >200 mm thick slab, multi pass rough rolling on a reversing mill, finish rolling on a 5–7 stand continuous rolling mill; 2 – casting of a 50–70 mm thick slab, 0–2 rough rolling passes, finish rolling on a 5–7 stand continuous rolling mill (Compact Strip Production technology); 3 – casting of a
