Warm working characterization of low carbon steel in hot rolling

In present investigation, warm working characteristics of ferrite were studied for 0.044C-1.51Cu-1.52Mn-0.064Ti steel by Scanning Electron Microscopy images, Energy-dispersive X-ray spectroscopy and Transmission Electron microscopy. The specimens were subjected to multi-pass hot rolling at 800 °C and 850 °C with holding time of 10 minutes. The result shows that Cu precipitation take place during the formation of warm worked ferrite and there is evidence of formation of Cu precipitates at the boundaries of newly born ferrite grains. This has the implication of inhibition of grain boundary movement; hence ferrite grains of size 1-4 micron are formed. It is also observed that the intra-granular fine precipitates of titanium carbosulphides/ sulphides, copper particles at the boundaries and irregular and massive oxysilicates at the large angle grain boundaries.