Abstract：The thermal simulation of compression was carried out by finite element method. The effect of uneven distribution of strain during compression on dynamic recrystallization and grain size of austenite was analyzed. The results show that dynamic recrystallization of austenite in the zone of largest effective plastic strain doesn’t be most complete, while shear strain has more strong effect on dynamic recrystallization. Dynamic recrystallization occurs most completely in the zone of largest shear strain, making grain size minimum. Under the given deformation condition with largest strain of 62%, there is a critical value for the effect of effective plastic strain on grain refinement. When the effective plastic strain is larger than 0.96, the austenite grains in noncomplete dynamic recrystallized zone can’t be refined further. However, austenite grains are refined continuously with the increasing of shear strain. Thus, shear strain has much more effect on austenite grain refinement. The method in which the zone where the effective plastic strain equals to real strain is chosen to determine the grain size, is not reasonable, and further research is required.
魏洁;李权;唐广波;刘正东. 碳锰钢压缩过程中非均匀应变与再结晶之间关系的研究[J]. 钢铁, 2006, 41(7): 0-0.
WEI Jie;LI Quan;TANG Guangbo;LIU Zhengdong. Investigation on the Relationship of Uneven Strain and Recrystallization during CMn Steel Compression. Iron and Steel, 2006, 41(7): 0-0.
2006, Vol. 41 