Research and development of low-cost light gauge L485M pipeline steel

Xu Haijian; Guo Cheng; Gao Hong; Ren Yi; Qiao Xin; Sha Xiaochun

doi:10.7513/j.issn.1004-7638.2022.03.029

Volume 43 Issue 3

Jun. 2022

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Article Navigation > IRON STEEL VANADIUM TITANIUM > 2022 > 43(3): 191-196

Xu Haijian, Guo Cheng, Gao Hong, Ren Yi, Qiao Xin, Sha Xiaochun. Research and development of low-cost light gauge L485M pipeline steel[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(3): 191-196. doi: 10.7513/j.issn.1004-7638.2022.03.029

Citation:

Xu Haijian, Guo Cheng, Gao Hong, Ren Yi, Qiao Xin, Sha Xiaochun. Research and development of low-cost light gauge L485M pipeline steel[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(3): 191-196. doi: 10.7513/j.issn.1004-7638.2022.03.029

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Research and development of low-cost light gauge L485M pipeline steel

doi: 10.7513/j.issn.1004-7638.2022.03.029

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

Received Date: 2021-04-14
Publish Date: 2022-06-30

Abstract

Abstract

Effects of heating temperature, rolling process, and cooling rates on microstructure variation and mechanical properties for low-cost L485M were studied. The results show that the austenite grains grow continuously with increasing temperatures. The average austenite grains can be controlled within 50 μm by maintaining the heating temperature below 1200 ℃. The grains can be refined by increasing the thickness of the intermediate slab to enhance the cumulative reduction rates and increase the number density of precipitates. Eventually, the cooling rate is improved, which inhibits pro-eutectoid ferrite transformation and promotes the formation of ultrafine granular bainite and acicular ferrite. In addition, the microstructure of investigated steel consists of acicular ferrite and granular bainite at the cooling rate of 25 ℃/s, which was beneficial to improving the strength and toughness of steel. The L485M grade pipeline steel satisfies the requirements of the technical agreements, which can provide a route to produce the low-cost L485M plates. A batch of L485M plates without Mo addition was steadily produced in Ansteel Company.
- L485M pipeline steel,
- heating temperature,
- cooling rate,
- acicular ferrite

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References(10)

References

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