Ak Steel Properties, Inc.

Paul Valdas Janavicius

Luis Gonzalo Garza-Martinez

Grant Aaron Thomas

Erik James Pavlina

George A Paraskos

Amrinder Singh Gill

Ralph Mutschler

Larry E Parrella

Luis G Garza-Martinez

A zinc-coated steel may be produced by performing a pre-alloying heat treatment after galvannealing the steel and prior to the hot stamping the steel. The pre-alloying heat treatment is conducted at a temperature between about 850&#xb0; F. and about 950&#xb0; F. in an open coil annealing process. The pre-alloying heat treatment allows for shorter time at the austenitization temperature to form a desired &#x3b1;-Fe phase in the coating by increasing the concentration of iron. This also decreases the loss of zinc, and a more adherent oxide exists after hot stamping.

Zinc-coated steel for press hardening applications and method of production

Warming a metastable steel after coating and before or during cold rolling suppresses the transformation of austenite to martensite, resulting in lower mill loads and higher amounts of reduction at similar loads. As-warm rolled steel has enhanced mechanical properties when compared to steel reduced the same amount by cold rolling at room temperature.

Reduction at elevated temperature of coated steels containing metastable austenite

A meniscus coating apparatus and method for coating at least one surface of a metal strip includes an apparatus having an adjustable coating tray, a roll enclosure disposed adjacent the coating tray, an adjustable baffle, and/or a gas delivery device operable to help seal the roll enclosure.

Meniscus coating apparatus and method

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Wyoming, OH, United States of America

Paul Valdas Janavicius