Cold rolled steel sheets having an improved press formability

Details Cold rolled steel sheets having an improved press formability Cold rolled steel sheets having an improved press formability

C - Chemistry, Metallurgy

21

D

13/1, 204/15, 11

C21D 8/04 (2006.01) B05D 3/12 (2006.01) B21B 1/22 (2006.01) B21D 22/20 (2006.01) C21D 9/38 (2006.01)

Patent

CA 1275154

COLD ROLLED STEEL SHEETS HAVING AN IMPROVED PRESS FORMABILITY Abstract A cold rolled steel sheet or plated steel sheet having an improved press formability as well as excellent phosphatability, resistance to galling and spot weldability is produced by controlling a surface roughness pattern of the steel sheet so as to satisfy a center-line average surface roughness of 0.3-2.0 µm and a regularity parameter in at least one direction of not more than 0.25 defining the regularity of surface roughness.

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