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| Development and Commercial Run of Hot-Rolled Fine-Grained Strip Steels in Shasteel |
| LIU Dong-sheng1,LI Ran2,CHEN Shao-hui2 |
1. Institute of Research of Iron and Steel, Shasteel, Zhangjiagang 215625, Jiangsu, China
2. Jiangsu Shagang Group, Zhangjiagang 215625, Jiangsu, China |
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Abstract Industrial mass production was conducted for hot-rolled plain carbon-manganese strip steels with fine-grained microstructure based on systematic studies in laboratory, test-plant rolling trials and a series of industrial rolling trials. The mechanism of deformation-induced-ferrite-transformation (DIFT) is utilized during finish rolling and lamellar water flow cooling employed on run-out table to form fine-grained ferrite microstructure consisting of PF+P+B in manganese containing (w(［C］) is 0.13%-0.17%,w(［Mn］) is 0.2%-0.7%) low carbon steels. The technical approach to produce fine-grained microstructure consisting of PF+B in low carbon high manganese (w(［C］) is 0.13%-0.17%, w(［Mn］) is 1.5%) containing steels is featured by conventional finish controlled-rolling in non-recrystallized austenite region followed by the same accelerated cooling as the case for low manganese containing steels. Fine-grained hot rolled strip steels with thickness at 4.0-5.5mm have been produced with a 1450mm hot strip mill.
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Received: 30 August 2010
Published: 17 November 2011
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2011, Vol. 46 
