High-strength steel plate having excellent combination of strength and ductility, and manufacturing method therefor

@inproceedings{2015HighstrengthSP,
  title={High-strength steel plate having excellent combination of strength and ductility, and manufacturing method therefor},
  author={李昌勋},
  year={2015}
}
The present invention comprises the steps of: heating and austenitizing a steel plate in which austenite can remain during cooling; primarily cooling the austenitized steel plate to T1, corresponding to a bainite region, and primarily isothermally transforming the steel plate; and secondarily cooling the primarily isothermally transformed steel plate to T2, which corresponds to a bainite region and is 50DEG or more lower than T1, and secondarily isothermally transforming the steel plate… CONTINUE READING

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