HOT ROLLED COATED STEEL SHEET HAVING HIGH STRENGTH, HIGH FORMABILITY, EXCELLENT BAKE HARDENABILITY AND METHOD OF MANFUACTURING SAME
A hot-rolled coated steel sheet including: in wt %, C: 0.05-0.14%, Si: 0.1-1.0%, Mn: 1.0-2.0%, P: 0.001-0.05%, S: 0.001-0.01%, AI: 0.01-0.1%, Cr: 0.005-1.0%, Ti: 0.005-0.13%, Nb: 0.005-0.03%, N: 0.001-0.01%, Fe residues, and other inevitable impurities; a mixed structure of ferrite and bainite as a...
Saved in:
Main Authors | , |
---|---|
Format | Patent |
Language | English |
Published |
03.06.2021
|
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | A hot-rolled coated steel sheet including: in wt %, C: 0.05-0.14%, Si: 0.1-1.0%, Mn: 1.0-2.0%, P: 0.001-0.05%, S: 0.001-0.01%, AI: 0.01-0.1%, Cr: 0.005-1.0%, Ti: 0.005-0.13%, Nb: 0.005-0.03%, N: 0.001-0.01%, Fe residues, and other inevitable impurities; a mixed structure of ferrite and bainite as a main phase; and as a remaining structure, one or more selected from the group consisting of martensite, austenite, and phase martensite (MA), wherein a fraction of the ferrite and bainite is 95-99 area % and Equation 1 is satisfied. [Equation 1] FCO{110} +FCO{112} ≥10 where, FCO{110} and FCO{112} , each representing an area fraction occupied by a structure having ac crystal orientation of {110} and {112} . |
---|---|
Bibliography: | Application Number: US201917253284 |