Tata Steel Ijmuiden B.v.

Tata Steel Nederland Technology B.v.

Stefanus Matheus Cornelis Van Bohemen

David Neal Hanlon

Maxim Peter Aarnts

Shangping Chen

Theo Arnold Kop

Richard Mostert

Marga Josina Zuijderwijk

Petra Seda

A method of a heat treating a cold rolled steel strip includes the steps of soaking a cold rolled steel strip above (Ac3−20) for a certain soaking duration thereby obtaining a cold rolled steel strip having an austenitic microstructure; cooling the soaked steel strip to below Ms; heating and heat treating the cooled strip in the temperature range of Bs-Ms; and cooling the heat treated strip to ambient temperature.

Method of heat treating a cold rolled steel strip

A high strength steel strip having medium amounts of C, Mn, Si, Cr and Al, wherein the steel strip has a microstructure consisting of, in vol. %: ferrite and bainite together 50-90%, martensite&#x3c;15%, retained austenite 5-15%, the remainder being pearlite, cementite, precipitates and inclusions together up to 5%.

High strength steel with improved mechanical properties

A steel strip having a hot dip zinc based coating, the steel strip having the following composition, in weight %:

Steel strip having high strength and high formability, the steel strip having a hot dip zinc based coating

A process for producing hot-rolled steel strip with a tensile strength of between 760 and 940 MPa and a steel produced therewith, suitable for producing parts by working such as press forming, bending or stretch flanging.

Growing community of inventors

Haarlem, Netherlands

Stefanus Matheus Cornelis Van Bohemen