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The solidification and transformation characteristics of a series of highly alloyed stainless steels small-scale laboratory ingots containing various Ni, Cr, Si, Mo and N concentration have been made. The results have been compared with predictions from both empirical and more rigorous thermodynamic techniques (MTDATA). It was found that the liquidus temperature could be predicted with reasonable accuracy by using the commonly accepted FeNiCr phase diagram in conjunction with binary depression summation for minor elements. The use of MTDATA resulted in large liquidus discrepancies due to an erroneous effect of Si, and cannot therefore be recommended without additional fundamental work. However, the use of MTDATA in its full 12 element version did results in accurate prediction of primary solidification phase for the majority of the steels. The room temperature residual ferrite content can be predicted with reasonable accuracy using traditional techniques. The results of the investigation have been used to determine suitable compositions for continuous casting trials for a range of steel grades.

Additional information

Authors: ALLAN C, British Steel plc, London (GB)
Bibliographic Reference: EUR 13941 EN (1997) 85pp., FS, ECU 16.50
Availability: Available from the (2)
ISBN: ISBN 92-827-9302-8
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