Effect of on-line solution treatment on the microstructure and mechanical properties of 2507 duplex stainless steels

Xu Haijian; Han Chufei; Guo Cheng; Qiao Xin; Liu Liu; Sha Xiaochun

doi:10.7513/j.issn.1004-7638.2023.05.026

Volume 44 Issue 5

Oct. 2023

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Xu Haijian, Han Chufei, Guo Cheng, Qiao Xin, Liu Liu, Sha Xiaochun. Effect of on-line solution treatment on the microstructure and mechanical properties of 2507 duplex stainless steels[J]. IRON STEEL VANADIUM TITANIUM, 2023, 44(5): 176-179. doi: 10.7513/j.issn.1004-7638.2023.05.026

Citation:

Xu Haijian, Han Chufei, Guo Cheng, Qiao Xin, Liu Liu, Sha Xiaochun. Effect of on-line solution treatment on the microstructure and mechanical properties of 2507 duplex stainless steels[J]. IRON STEEL VANADIUM TITANIUM, 2023, 44(5): 176-179. doi: 10.7513/j.issn.1004-7638.2023.05.026

Citation:

Xu Haijian, Han Chufei, Guo Cheng, Qiao Xin, Liu Liu, Sha Xiaochun. Effect of on-line solution treatment on the microstructure and mechanical properties of 2507 duplex stainless steels[J]. IRON STEEL VANADIUM TITANIUM, 2023, 44(5): 176-179. doi: 10.7513/j.issn.1004-7638.2023.05.026

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Effect of on-line solution treatment on the microstructure and mechanical properties of 2507 duplex stainless steels

doi: 10.7513/j.issn.1004-7638.2023.05.026

1.
Anshan Iron & Steel Co., Ltd., Anshan 114009, Liaoning, China
2.
Anshan Iron & Steel Construction Co., Ltd., Anshan 114009, Liaoning, China

Received Date: 2022-06-03
Available Online: 2023-11-04
Publish Date: 2023-10-31

Abstract

Abstract

Effects of on-line solution treatment and holding time on the microstructure and mechanical properties of 2507 duplex stainless steels were studied by hot-rolling experiments, Zeiss optical microscope (OM) and transmission electron microscopy (TEM). The results show that the volume fraction of ferrite, yield strength and tensile strength of the on-line solution treated steels are slightly higher than those of the off-line aging specimens, while the elongation and low temperature impact toughness are obviously decreased. With increasing the holding time after rolling, the amount of zigzag austenite at phase boundaries decreases and changes to island austenite eventually. TEM analysis shows that a large number of dislocations are distributed in the ferrite phases by on-line solution treatment. With increasing the holding time, the Cr₂N particles precipitate at the phase boundaries between ferrite and austenite, which lead to the reduction of the ductility and corrosion resistance. Considering the amount of brittle phase and the evolution of austenite morphology, the steel plates should be quickly immersed in the cooling system after rolling.
- 2507 duplex stainless steel,
- ductility,
- solution treatment,
- microstructure,
- Cr₂N precipitates

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References(11)

References

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