Method for manufacturing high-strength and high-ductility steel
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United States of America Patent
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Aug 14, 2018
Grant Date -
Aug 4, 2016
app pub date -
Jul 10, 2015
filing date -
Jan 30, 2015
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Abstract
A method for manufacturing a high-strength and high-ductility steel includes steps in which an alloy steel is provided. The method continues with step in which the alloy steel is hot rolled, so that the microstructure of the alloy steel includes austenite, bainite and martensite. The method continues with step in which the hot-rolled alloy steel is annealed, so as to decompose bainite and martensite structures of the alloy steel into ferrite and austenite structures. The method continues with step in which the annealed alloy steel is cold rolled. The method continues with step in which the cold-rolled alloy steel is annealed, so as to manufacture a high-strength and high-ductility steel in a phase with 50% to 70% of residual austenite.
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