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
Headset electronics
Topology arrangement for achieving reliable communication in wireless automotive networks
Etch resistant clearcoat
Packet bundling at the PDCP layer
Pyrazole kinase modulators and methods of use
Collaborative data redundancy for configuration tracking systems
Package for product
  Randomly Featured Patents
Apparatus and method for forming a clay slab
Stable sulfide compositions uses and process for preparation thereof
Process for producing celluose moldings
Nonvolatile semiconductor memory device including two-transistor type memory cells and its manufacturing method
Pre-stressed concrete construction
Addressing scheme for convolutional interleaver/de-interleaver
Electronic musical instrument and a method of dynamic channel assignment for solo and non-solo tones
Method to serve real-time data in embedded web server
Thermoformable laminate structure with improved acoustical absorption
Electroacoustic musical instrument with controlled fade-out