Effect of continuous annealing fast cooling outlet temprature on the microstructures and properties of SPCC cold rolled sheet

Zhou Bowen; Jiang Cailing; Fan Lei; Liu Yihu; Lu Maosen; Yang Yuebiao

doi:10.7513/j.issn.1004-7638.2024.04.025

Volume 45 Issue 4

Aug. 2024

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Article Navigation > IRON STEEL VANADIUM TITANIUM > 2024 > 45(4): 176-180

Zhou Bowen, Jiang Cailing, Fan Lei, Liu Yihu, Lu Maosen, Yang Yuebiao. Effect of continuous annealing fast cooling outlet temprature on the microstructures and properties of SPCC cold rolled sheet[J]. IRON STEEL VANADIUM TITANIUM, 2024, 45(4): 176-180. doi: 10.7513/j.issn.1004-7638.2024.04.025

Citation:

Zhou Bowen, Jiang Cailing, Fan Lei, Liu Yihu, Lu Maosen, Yang Yuebiao. Effect of continuous annealing fast cooling outlet temprature on the microstructures and properties of SPCC cold rolled sheet[J]. IRON STEEL VANADIUM TITANIUM, 2024, 45(4): 176-180. doi: 10.7513/j.issn.1004-7638.2024.04.025

Citation:

Zhou Bowen, Jiang Cailing, Fan Lei, Liu Yihu, Lu Maosen, Yang Yuebiao. Effect of continuous annealing fast cooling outlet temprature on the microstructures and properties of SPCC cold rolled sheet[J]. IRON STEEL VANADIUM TITANIUM, 2024, 45(4): 176-180. doi: 10.7513/j.issn.1004-7638.2024.04.025

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Effect of continuous annealing fast cooling outlet temprature on the microstructures and properties of SPCC cold rolled sheet

doi: 10.7513/j.issn.1004-7638.2024.04.025

1.
Guangxi Liuzhou Iron & Steel Group Co. Ltd., Liuzhou 545000, Guangxi, China
2.
Guangxi Iron & Steel Group Co. Ltd., Fangchenggang 538000, Guangxi, China

Received Date: 2023-12-15
Publish Date: 2024-08-30

Abstract

Abstract

Effect of continuous annealing fast cooling outlet temprature on the microstructures and properties of SPCC cold rolled sheet was studied. The results show that there are equiaxed ferrite grains, massive carbides on grain boundaries and granular carbides in grains in the continuous annealed SPCC cold rolled sheet. The fast cooling outlet temprature mainly affects the precipitation and distribution of carbides in steels. With a drop of the fast cooling outlet temprature, the number of carbides on the grain boundaries decreases, and the number of carbides in grains increases. The existing proportion of yield platform in the testing coils decreases, and the yield strength also decreases obviously with the decrease of outlet temperatures. When the fast cooling outlet temprature decreases from 500 ℃ to 430 ℃, the existing proportion of yield platform decreases from 55% to 10%, and the average yield strength decreases by about 22 MPa.
- SPCC cold rolled sheet,
- continuous annealing,
- fast cooling outlet temprature,
- microstructure,
- mechanical property

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References

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