High strength cold-rolled steel sheet exhibiting little variation in strength and ductility, and manufacturing method for same
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 21, 2017
Grant Date -
Apr 30, 2015
app pub date -
May 24, 2013
filing date -
May 29, 2012
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
In a high strength cold-rolled steel plate having a specific chemical composition, a soft first phase (ferrite) has an area ratio of 20-50%, the remainder being a hard second phase (tempered martensite and/or tempered bainite), among all the ferrite grains, ferrite grains that have an average grain diameter of 10-25 μm account for a total area ratio of 80% or more, the number of the cementite grains that have an equivalent circle diameter of 0.3 μm or more is more than 0.15 piece and 1.0 piece or less per 1 μm2 of ferrite, and the tensile strength is 980 MPa or more.
First Claim
Family
International Classification(s)
- [Classification Symbol]
- [Patents Count]
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully