Effect of RE on carbon recrystallization behavior of micro-alloy steel

With the development of metallurgical technology , rare earth in steel has been widely used. Rare in the steel can purify the molten steel , changed inclusions, micro- alloyed cast structure improvement , so as to improve the mechanical properties of steel , processing performance, corrosion resistance and so on. With the development of various industries , low carbon micro-alloyed steels have great potential in improving the strength and toughness . Improve the quality of steel to improve its strength and toughness ratio, and lower production costs have become an important research topic in the field of iron and steel materials . Micro- alloy hot-rolled steel in high temperature deformation dynamic recrystallization process can be refined strain softening behavior after the austenite and ferrite microstructure subsequent formation of hot-rolled steel and the final performance of a larger organization affected.

Inner Mongolia University of Technology researchers in the laboratory using thermal simulation techniques to study the effects of rare earth alloy low carbon micro recrystallization behavior , the results show that the rare earth component of the dynamic recrystallization critical strain εD influence is obvious, RE (mass fraction , the same below ) of 100 × 10-6 and 60 × 10-6 rare specimen reached its critical strain were higher than plus rare specimens , and when the deformation temperature reaches 910 ℃, with the increasing amount of non- rare-earth recrystallization happen again , that adding rare earth postponed dynamic recrystallization occurs with increasing amount of rare earth defer more significant role ; dual pass high temperature rolling, effect of RE on static recrystallization softening rate than cold rolling system significantly , compared with the samples without RE , rE join 100 × 10-6 deformation resistance there will be some improvement in the recrystallization prone to pass the time gap , while slightly less rare earth content had no significant effect .


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