Tata Steel Ijmuiden B.v.

Tata Steel Nederland Technology B.v.

Richard Mostert

Shangping Chen

Maxim Peter Aarnts

Theo Arnold Kop

Egbert Jansen

Edward Anton Frederik Span

Stefanus Matheus Cornelis Van Bohemen

Arunansu Haldar

Alireza Saeed-Akbari

Edward Anton Span

Bin Xiao

A method of heat treating a high strength cold rolled steel strip including

Heat treatment of cold rolled steel strip

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

An austenitic, low-density, high-strength steel strip or sheet having a high ductility, and a method of producing the steel strip or sheet, and for its use.

Austenitic, low-density, high-strength steel strip or sheet having a high ductility, method for producing said steel and use thereof

A dual phase or complex phase steel strip showing no tigerstripes. The steel strip having an ultimate tensile strength Rm classifying for 1000 MPa steel category, includes (in mass percent) C 0.09-0.19%; Mn 1.9-2.6%; Si at most 0.1%; Cr 0.4-0.8%; Mo at most 0.3%; Ni at most 0.4%; Al 0.02-1.3%; and optionally one or more of the following elements: Nb at most 0.08%; P equal to or more than 0.0005%; N equal to or less than 0.015%; Ti equal to or less than 0.1%; V equal to or less than 0.1%; B equal to or less than 0.01%; wherein the sum of Cr, Mo and Ni is at least 0.5%; the balance being Fe and inevitable impurities.

Steel strip having a low Si content

A dual phase or complex phase steel strip showing no tigerstripes. The steel strip includes, in mass percent, the following elements: C 0.08-0.11%; Mn 1.70-2.20%; Si at most 0.1%; Cr 0.40-0.70%; Mo at most 0.3%; Ni at most 1.0%, Al 0.01-1.50%; Nb at most 0.07%; P equal to or more than 0.005%; N equal to or less than 0.015%; Ti equal to or less than 0.1%; V equal to or less than 0.1%; B equal to or less than 0.01%; wherein the sum of Cr, Mo and Ni is at least 0.5%; the balance being Fe and inevitable impurities.

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Heemskerk, Netherlands

Richard Mostert