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
Method and system for modeling a common-language speech recognition, by a computer, under the influence of a plurality of dialects
Fusing device to prevent overheating of a heating member and image forming apparatus having the same
Sperm factor sequences
Smooth silicon-containing films
Methods, systems, and media for swapping faces in images
Diazeniumdiolated phosphorylcholine polymers for nitric oxide release
Laser protection polymeric materials
  Randomly Featured Patents
Programmable ring oscillator
Methods for detecting NTR3 nucleic acids by hybridization
Stable low dropout voltage regulator
Flexible automotive assembly line and method
Portable pet food container
Assembly and method for testing the integrity of stuffing tubes
Fiber optic sensor for shaft state
All-digital line-of-sight (LOS) processor architecture
Locking system for a semitrailer chassis and removable container
Supported hydrogenation and hydrotreating catalysts