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
Plants and seeds of corn variety CV577261
Light-emitting device, film-forming method and manufacturing apparatus thereof, and cleaning method of the manufacturing apparatus
Power saving methods for wireless systems
Edge alphas for image translation
Nuclear reactor building and construction method thereof
Systems and methods for simultaneously configuring multiple independent backups
Single-electron detection method and apparatus for solid-state intensity image sensors with a charge splitting device
  Randomly Featured Patents
Utility motor vehicle with carrier
Container for holding cells or viruses for disruption
Ammunition clip protector
Multiprocessor computing system featuring shared global control
System and method of load-store forwarding
Window fin corner piece
Temperature compensating flux ring
Polyurethane sponges manufactured with additive dispersed therein
Combined fishing rod and cane pole holder
Method using bill and coin images on a touch screen for processing payment for merchandise items