Production process optimization of high-quality steel for engineering machinery

Zhai Dongyu; Zhang Youyou; Lei Xiaorong; Liu Shuai; Chang Yunhe

doi:10.7513/j.issn.1004-7638.2023.01.026

Volume 44 Issue 1

Feb. 2023

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Zhai Dongyu, Zhang Youyou, Lei Xiaorong, Liu Shuai, Chang Yunhe. Production process optimization of high-quality steel for engineering machinery[J]. IRON STEEL VANADIUM TITANIUM, 2023, 44(1): 167-174. doi: 10.7513/j.issn.1004-7638.2023.01.026

Citation:

Zhai Dongyu, Zhang Youyou, Lei Xiaorong, Liu Shuai, Chang Yunhe. Production process optimization of high-quality steel for engineering machinery[J]. IRON STEEL VANADIUM TITANIUM, 2023, 44(1): 167-174. doi: 10.7513/j.issn.1004-7638.2023.01.026

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Production process optimization of high-quality steel for engineering machinery

doi: 10.7513/j.issn.1004-7638.2023.01.026

1.
Technology Research and Development Department, Nanjing Iron and Steel Co., Ltd., Nanjing 210035, Jiangsu, China
2.
Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing 100083, China

Received Date: 2022-01-21
Publish Date: 2023-02-28

Abstract

Abstract

Hot-rolled steel plates used in engineering machinery have strict requirements not only on mechanical properties but also on surface quality. NISCO successfully produced hot-rolled steel plates for high-quality engineering machinery by optimizing chemical composition design, controlling molten steel smelting process, and reducing austenitizing temperature and second stage rolling temperature. The obtained steel achieved ferrite and pearlite microstructure, fine grain size of ASTM 10 without strip structure presence, and stable tensile properties as well as excellent low temperature impact value up to 220 J. The combination of smelting technology of clean steel, low temperature austenitizing technology and low temperature rolling and cooling process can reduce the iron olivine formation on steel plate surface and therefore promote a dense, stable and unbreakable oxide scale with the thickness of 5 µm. The existence of the oxide scale avoids the secondary damage of the plate surface during transportation and storage, and ensures the use quality for customers. Through this research the industrial manufacturing technology of high-quality steel of engineering machinery had been obtained.
- hot-rolled steel,
- engineering machinery,
- mechanical properties,
- surface quality,
- microstructure

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References(13)

References

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