Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Process for producing high-strength, low yield ratio and high ductility dual-phase structure steel sheets










Image Number 11 for United States Patent #4285741.

Process for producing a high strength, low yield ratio and high ductility dual-phase structure steel sheet having a structure composed mainly of a ferrite phase and a rapidly cooled transformation phase and having excellent formability with a tensile strength of 40 kg/mm.sup.2 or higher. The process comprises cooling the continuously annealed steel sheet under the following conditions:(1) 1.degree. C./second.ltoreq.R.sub.1 .ltoreq.30.degree. C./secondwherein R.sub.1 represents an average cooling rate from the continuous annealing temperature down to an intermediate temperature T.degree. C. in the cooling process.(2) 4.degree. C./second.ltoreq.R.sub.2 .ltoreq.100.degree. C./secondwherein R.sub.2 represents an average cooling rate from T.degree. C. to a temperature not higher than 200.degree. C.,(3) R.sub.1 <R.sub.2 and(4) 420.degree. C..ltoreq.T.ltoreq.700.degree. C.








 
 
  Recently Added Patents
Support for a portable electronic device
Electric rotating machine for vehicle
Battery loading and unloading mechanism
Method of requesting CQI reports
Methods and apparatus for clock signal synchronization in a configuration of series connected semiconductor devices
Cooking tray
Flexible quantization
  Randomly Featured Patents
Inter-procedural allocation of stacked registers for a processor
System and method for modeling, monitoring and managing telecommunications networks and infrastructure
Columnar crystals of 6-hydroxy-2-naphthoic acid and process for manufacturing the same
Lens device for a camera with a stepping motor drive optimized for speed and power saving
Dresser
Combination gear drive with improved clutch assembly
Coating
Luminescent signaling displays utilizing a wireless mobile communication device
Apparatus for reducing drag across a flow surface
1-phenyl-6-one-pyrimidine derivatives