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
Optimizing federated and ETL'd databases with considerations of specialized data structures within an environment having multidimensional constraint
Ignition device in particular for an internal combustion engine, and method for manufacturing same
Wireless refrigerant scale platform
Rotation angle sensor
Electronic apparatus and manufacturing method of electronic apparatus
Portable electronic device housing including hinge
Handbag
  Randomly Featured Patents
System and method for dynamic distribution of data packets through multiple channels
Method for notification and control of incoming calls in a network
Method of communicating and associated transmitter using coded orthogonal frequency division multiplexing (COFDM)
Tester for a reed relay printed circuit board
Electronic device and method for manufacturing the same
Method for memory testing
Autotransfusion system with portable detachable vacuum source
Tire with low thermal expansion component
Sublingual and buccal compositions of droperidol and method for treating migraine
Expandable trailer, container or caravan