Modeling Pearlite Transformation in Super-high Strength Wire Rods: II. Simulation in Fe–C Base Multi-component Alloys

Abstract

A model of pearlite transformation developed in a companion paper was applied to the transformation in experimental multi-component super-high strength wire rods, which contained Si, Cr, Mn, V and Ti. It was assumed that the transformation occurred without partitioning of alloying elements below the nose temperature where patenting is usually performed. Calculated pearlite start and finish temperatures and lamellar spacing were in good agreement with experiment by Gleeble thermomechanical simulator. The importance of controlling recalescence was noted in order to make lamellar spacing as small as possible.

Modeling Pearlite Transformation in Super-high Strength Wire Rods: I. Modeling and Simulation in Fe–C–X Ternary Alloys

“…The pearlite start (Ps) and finish temperature (Pf) for CCT or TTT curves were determined from the points at which a dilatometric curve deviated from the straight line, as described elsewhere. 19) After specimens were polished and etched by 4% nital, the size and number of pearlite nodules were measured by software of quantitative analysis of 2D microstructure (ImagePro Plus) on the specimen surface of area 1.12 × 10 The interlamellar spacing was measured by surveying colonies for a minimum spacing. This method is widely used because the probability of lamellae being nearly perpendicular to the specimen surface is relatively high.…”