Effect of rolling deformation on niobium carbide particle size distribution in low-carbon steel
1979; Taylor & Francis; Volume: 13; Issue: 3-4 Linguagem: Inglês
10.1179/msc.1979.13.3-4.228
ISSN2057-7834
Autores Tópico(s)Metallurgical Processes and Thermodynamics
ResumoAbstractAbstractThe present work is concerned with the effect of niobium on the recovery and recrystallization of steels containing 0.04–0.05%C, l.6%Mn, and 0.06–0.08%Nb. The effect of deformation on the average particle size of NbC has been studied by comparing controlled-rolled specimens with those which were not deformed, but were continuously cooled at a similar rate. The particle size was found to increase progressively with decreasing temperature in both experiments. In the rolled material, a decrease in the average particle size was observed immediately after the introduction of a rolling pass when rolling was carried out above 970°C. When rolling was continued into ferrite, two separate particle size distributions were obtained, the larger associated with precipitation in austenite and the finer with precipitation in the recently nucleated ferrite. The variation in austenite grain size with temperature was also considered, and the inhibition of recrystallization and grain growth associated with the stabilization of an austenite sub-boundary network.
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