Resources Contact Us Home
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) C./second.ltoreq.R.sub.1 C./secondwherein R.sub.1 represents an average cooling rate from the continuous annealing temperature down to an intermediate temperature C. in the cooling process.(2) C./second.ltoreq.R.sub.2 C./secondwherein R.sub.2 represents an average cooling rate from C. to a temperature not higher than C.,(3) R.sub.1 <R.sub.2 and(4) C.

  Recently Added Patents
Dynamic learning method and adaptive normal behavior profile (NBP) architecture for providing fast protection of enterprise applications
Simultaneous image distribution and archiving
System and method for providing advice to consumer regarding a payment transaction
Bioactive agent-loaded heart-targeting nanoparticles
Glass or glass-ceramic pane reflecting infrared radiation
Method for drug screening and characterization by calcium flux
  Randomly Featured Patents
Method of forming a mirror in a waveguide
Plasma panel with dynamic keep-alive operation
Gas pedal
Cable conduit system for vehicles
Enteral-specific spike/bag port system
Process for generating electric power
Pellets obtained from cell cultures of keratinocytes and their use in wound healing
Ladder supports
Wafer guides for processing semiconductor substrates
Screening methods for cytokine inhibitors