Jfe Steel Corporation

Thyssenkrupp Steel Ag

Thyssenkrupp Steel Europe Ag

Fried Krupp Ag Hoesch-krupp

Günter Stich

Thomas Heller

Akio Kobayashi

Brigitte Hammer

Rolf Bode

Hiroshi Matsuda

Takeshi Yokota

Yasushi Tanaka

Yasunobu Nagataki

Kohei Hasegawa

Kazuhiro Seto

Yoshihiro Hosoya

Shusaku Takagi

Kenji Kawamura

Jens-Ulrik Becker

Taro Kizu

Bernhard Engl

Roland Wunderlich

Horst Walter Tamler

Jian Bian

Dorothea Mattissen

Klaus-Dieter Horn

Ekaterina Bocharova

Brigitte Bode, Legal Representative

Thomas Nickels

Silke Strauss

A high strength steel, including about 0.05 to about 0.25% of C, less than about 0.5% of Si, about 0.5 to about 3.0% of Mn, not more than about 0.06% of P, not more than about 0.01% of S, about 0.50 to about 3.0% of Sol. Al, not more than about 0.02% of N, about 0.1 to about 0.8% of Mo, about 0.02 to about 0.40% of Ti, and the balance of iron and unavoidable impurities, wherein the steel has a structure formed of at least three phases including a bainite phase, and a retained austenite phase in addition to a ferrite phase having a composite carbide containing Ti and Mo dispersed and precipitated therein, wherein the total volume of the ferrite phase and the bainite phase is not smaller than 80%, the volume of the bainite phase is about 5% to about 60%, and the volume of the retained austenite phase is about 3 to about 20%.

High strength steel excellent in uniform elongation properties and method of manufacturing the same

The invention relates to a wheel rim for a motor vehicle which can be economically manufactured, with a wheel disc made of steel sheet and a rim flap running around the circumference of the wheel disc. Due to the fact that the steel sheet of the wheel disc is formed from at least three superimposed steel layers, joined to one another by roll-bonding in a non-detachable manner, of which the inner core layer has a lower strength than the outer layers, it is thereby guaranteed that the wheel rim according to the invention, with a low weight, can safely accommodate the forces arising in practical operation.

Wheel rim for a motor vehicle

A high strength steel sheet and a method for manufacturing the same has superior phosphatability properties and hot-dip galvannealed properties besides a tensile strength of 950 MPa or more and a high ductility, and also having a small variation in mechanical properties with the change in annealing conditions.

High strength steel sheet having superior ductility

A method of producing cold-rolled, high-strength steel strip with good plasticity and isotropic properties out of steel comprising no more than 0.08% carbon, no more than 10% silicon, no more than 1.8% manganese, between 0.010 and 0.10% phosphorus, no more than 0.02% sulfur, no more than 0.08% aluminum and no more than 0.008% nitrogen by weight plus one or more of the elements titanium, vanadium, niobium, and zirconium, the remainder being iron, by hot rolling, cold rolling, and recrystallization annealing; followed by temper rolling. The steel contains either three times as much titanium or six times as much niobium or zirconium as nitrogen.

Method of producing cold-rolled, high-strength steel strip with good

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Bochum, Germany

Günter Stich