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Abstract：
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The thermal deformation of 2205 duplex stainless steel was studied under the deformation temperature of 850-1100 ℃, the deformation rate of 0.01-10 s-1 and the true strain of 0.91 by thermal simulation testing machine Gleeble-3800, and the flow stress-strain curve was drawn. Then, the thermal processing diagrams under different strains were constructed according to the dynamic material model, and the microstructure was analyzed by EBSD. The results show that the flow stress increases with the decreasing of the deformation temperature and the increasing of the strain rate, and the increase of the strain makes the dissipation value η gradually increase. In the instability area (925-1075 ℃/0.01-0.23 s-1), under the deformation conditions of 1000 ℃/0.01 s-1 and 1050 ℃/0.01 s-1, some grains in the ferrite phase grow up, while the strain energy of some austenite phases is small which still are equiaxed grains, so it shows obvious uneven strain distribution. Furthermore, the best processing area is mainly concentrated at 950-1100 ℃/4.9-10 s-1, under the conditions of 1000 ℃/10 s-1 and 1050 ℃/10 s-1 corresponding to this region, the dissipation value η reaches 64%, and the main reason is that more recrystallization occurs in the ferrite phase.
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Funds：
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辽宁省自然科学基金资助项目（2019-KF-25-05）；山西省教委科技创新项目（2020L0333）
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AuthorIntro：
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作者简介：郝建军（1972-），男，硕士，讲师，E-mail：haojj036@126.com；通信作者：张瑞丰（1996-），男，硕士研究生，E-mail：zrf18234222278@163.com
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Reference：
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