Processing of HSLA Grades on CSP Plants

摘要

Over the last decade the CSP technology has vastly extended it's product range. Today virtually all material groups typical for integrated steel works are processed on CSP plants, too. One example is the production of high strength low alloyed CSP hot strip by means of thermomechanical processing. The paper describes the processing of microalloyed steel grades on CSP plants. The deliberate utilization of the the applicable metallurgical action principles along with the consideration of the specific aspects of thin slab casting and direct rolling enable high strength low alloyed hot strip to be produced on CSP plants with great process reliability. It is shown that thermomechanical processing of HSLA grades on CSP plants results in hot strip showing very high ductility in addition to high strength even at low temperatures. The correlations established for thermomechanical processing between process-technological parameters, the microstructure and the material properties correspond well with results obtained in conventional hot strip mills. Hot strip produced and discussed in the paper covers a range of yield strength between 350 and 600 MPa. High strength CSP hot strip is successfully used for a large variety of applications in different branches of industry. With proven identical processing and service behaviour CSP hot strip offers an attractive alternative compared with conventional hot strip, not least because of its considerable cost benefits.