Study on microstructure and properties of high aluminum dual phase steel 980DH with high formability

Zhou Li; Xue Renjie; Cao Xiao’en; Dong Mengyao

doi:10.7513/j.issn.1004-7638.2022.02.028

Volume 43 Issue 2

May 2022

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Zhou Li, Xue Renjie, Cao Xiao’en, Dong Mengyao. Study on microstructure and properties of high aluminum dual phase steel 980DH with high formability[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(2): 186-191. doi: 10.7513/j.issn.1004-7638.2022.02.028

Citation:

Zhou Li, Xue Renjie, Cao Xiao’en, Dong Mengyao. Study on microstructure and properties of high aluminum dual phase steel 980DH with high formability[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(2): 186-191. doi: 10.7513/j.issn.1004-7638.2022.02.028

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Study on microstructure and properties of high aluminum dual phase steel 980DH with high formability

doi: 10.7513/j.issn.1004-7638.2022.02.028

1.
School of Mechanical Engineering and Automation, Chongqing Industry Polytechnic College, Chongqing 401120, China
2.
Technology Research Institute, HBIS Group, Shijiazhuang 050000, Hebei, China
3.
Technology Center, Handan Company, HBIS Group, Handan 056015, Hebei, China

Received Date: 2021-05-23
Available Online: 2022-05-11
Publish Date: 2022-04-28

Abstract

Abstract

The influence of static continuous cooling transformation and continuous annealing process on the structure and properties of cold-rolled plates for high aluminum dual phase steel 980DH with high formability were studied by phase transformation quenching dilatometer, continuous annealing simulation tester. The results show that when the cooling rate is between 5 °C/s and 10 °C/s, only bainite transformation occurs. When the cooling rate is greater than 15 °C/s, the proportion of bainite decreases and the fraction of martensite increases as the cooling rate increases. The microstructure of 980DH steel contain mainly ferrite, martensite and retained austenite. Under the processing conditions of soaking temperature at (780～800 ℃)×160 s, slow cooling temperature at 650～700 ℃, cooling rate at 50 ℃/s to 300 ℃ aging treatment for 5 minutes, and then air-cooled to room temperature, CR550/980DH steel plates can achieve excellent performance. It is hoped that this research can be beneficial to the industrial development of high-grade DH steel.
- dual phase steel,
- 980DH,
- static CCT curve,
- microstructure,
- property,
- retained austenite

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References(10)

References

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