Siemens Vai Metals Technologies Sas

Primetals Technologies France Sas

Arnaud D'Halluin

Benjamin Grenier

Laurent Cloutot

Stéphane Barjon

Stephane Barjon

A method produces a hardened galvanization of a continuously-running rolled steel strip. The strip is immersed in a coating tank containing a bath of a liquid metal mixture, e.g. zinc and aluminum, to be deposited on the strip, and permanently circulated between the coating tank and a preparation device. The temperature of the liquid mixture is deliberately lowered in order to reduce the iron solubility threshold and sufficiently high for initiating, in the preparation device, the fusion of at least one Zn&#x2014;Al ingot in an amount necessary for compensating for the liquid mixture used for deposition on the strip. The device is implemented so that the circuit for circulating the liquid mixture is thermally optimized.

Method for the hardened galvanization of a steel strip

A method and a device control the introduction of several metals into a cavity configured to melt the metals in the form of ingots. In particular, the method is configured to control the introduction of several metals into a cavity for melting the metals so as to dip-coat a steel strip with the metals in liquid metal form. Whereby a first metal is introduced in the form of at least a first ingot having a high content of the first metal and a second metal is introduced in the form of at least a second ingot formed as an alloy of the first metal and the second metal. The second metal content of the second ingot is chosen from a range of significant contents for ensuring an intended overall flow rate for combined melting of the ingots, the range of significant contents being chosen in a limited interval of sequentially increasing values so as to minimize differences between melting points of the ingots.

Method and device for controlling the introduction of several metals into a cavity designed to melt said metals

An installation for the hardened galvanization of a continuously-moving rolled steel strip, includes a coating tank receiving a liquid metal mixture containing, for example, zinc and aluminum to be deposited on the strip which is immersed in the mixture. The liquid mixture is permanently circulated between the coating tank and a preparation device, in which the temperature of the liquid mixture is deliberately lowered in order to reduce an iron solubility threshold and is sufficiently high for initiating fusion of at least one ingot containing a zinc-aluminum Zn&#x2014;Al alloy in a so-called fusion zone of the preparation device, in an amount necessary to compensate for the liquid mixture used for deposition on the strip. The installation includes a loop for circulating the liquid mixture that is thermally optimized.

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Villeurbane, France

Arnaud D'Halluin