An apparatus for controlling coating weight of a steel sheet by using an air knife includes: an air knife condition derivation unit configured to derive a first air knife gap and a final air knife pressure for target coating weight, and derive a second air knife gap for achieving the target coating weight at a current air knife pressure; and an air knife pressure response compensation unit configured to determine a final air knife gap according to a gap compensation amount that is a difference between the second air knife gap and the first air knife gap and a gap compensation ratio based on an air knife pressure variation amount for a control period, in which the control period is a period for updating an air knife condition for the target coating weight.

Provided is a plated steel sheet having an excellent quality with fine and even plating texture, the plated steel sheet including a base steel sheet and a Zn plating layer formed on the base steel sheet, wherein a Zn crystal in the plating layer has a size of 5 μm or less.

A steel processing line includes a roller submerged in a quantity of molten metal. The roller includes two journals. Each journal is received by an opening defined by a roller sleeve having a ceramic or refractory material. The roller sleeve is disposed between each journal and a bearing block to reduce or prevent wear on the journal. An inner dimension of each roller sleeve and an outer dimension of each respective journal defines a clearance. The inner dimension of each roller sleeve and the outer dimension of each respective journal is configured such that the clearance persists as the roller and the pair of roller sleeves are heated by the molten metal.

Provided are a method of predicting hydrogen content in steel of a steel strip etc. Provided is, in a continuous galvanizing line that performs manufacturing processes including an annealing process, a coating process, and a reheating process of a steel strip, a method of predicting hydrogen content in steel of a steel strip downstream of the reheating process, including acquiring at least one parameter selected from operation parameters of the continuous galvanizing line and transformation rate information measured in at least one of the annealing process and the reheating process as input data, and predicting hydrogen content in steel of a steel strip downstream of the reheating process using a prediction model of hydrogen content in steel that has been trained by machine learning and that outputs information on hydrogen content in steel of a steel strip downstream of the reheating process as output data.

Equipment for the continuous hot dip-coating of a metal strip 9 including an annealing furnace, a tank 2 containing a liquid metal bath 3, a snout connecting the annealing furnace and tank 2, through which the metal strip 9 runs in a protective atmosphere and the lower part of the snout, the sabot 5, is at least partly immersed in the liquid metal bath 3 in order to define with the surface of the bath, and inside this snout, a liquid seal 6, an overflow 7 not connected to the snout, the overflow 7 including at least one tray 8, placed in the vicinity of the strip 9 when entering the liquid metal bath 3 and encompassed by liquid seal 6.

A coated cast iron substrate including a coating including nanographites and a binder being sodium silicate, wherein the cast iron substrate has a composition, in weight percent, including from 2.0 to 6.67% C and including optionally one or more of the following elements: Mn≤3 wt %, Si≤5 wt %, Mo≤2 wt %, Cu≤2.5 wt %, Ni≤2 wt %, Cr≤3 wt %, V≤0.5 wt %, Zr≤0.3 wt %, Bi≤0.01 wt %, Mg≤0.1 wt %, Ce≤wt %, the remainder of the composition being made of iron and inevitable impurities resulting from the elaboration. A method for the manufacture of this coated cast iron substrate is also provided.

An equipment for the continuous hot dip-coating of a metallic strip comprising: an annealing furnace, a tank containing a liquid metal bath, a snout connecting the annealing furnace and said bath, through which the metallic strip runs in a protective atmosphere and the lower part of said snout, the snout tip, is at least partly immersed in the liquid metal bath in order to define with the surface of the bath, and inside this snout, a liquid seal, a moveable support system, on at least one tank side, comprising connecting means, an overflow connected to said moveable support system through said connecting means, comprising at least one vat and at a least one pump.

A wiping device 14 includes a pair of wiping nozzles 141, a nozzle mask 142, a rotating pin 1431a, a holding portion 1431b, and an arm portion 1432. The pair of wiping nozzles 141 is disposed such that nozzle ports 141a face each other, the nozzle mask 142 is disposed at both ends of the nozzle ports 141a of the wiping nozzles 141, the rotating pin 1431a is connected to an upper portion of the nozzle mask 142, the holding portion 1431b holds the rotating pin 1431a, the arm portion 1432 fixes the holding portion 1431b from above, and the rotating pin 1431a is rotatable around an axis and adjusts the position of the nozzle mask 142.

Disclosed is a treatment line for the continuous treatment of metal strips having a dual purpose, i.e. for producing strips that are annealed and dip-coated with a metal alloy and for producing strips that are annealed and not coated, comprising a dual-purpose cooling tower, i.e. for cooling strips that are annealed and not coated in a non-oxidizing atmosphere and for air-cooling strips that are annealed and coated.

A method for rinsing an overflow chamber at the bath-side end of a snout of a device for hot-dip coating a metal strip is presented. The snout guides the metal strip in a protective gas atmosphere before the metal strip is coated with a metal melt. A rinsing cycle is carried out in the overflow chamber of the snout by feeding metal melt from the molten bath into the overflow chamber and at the same time, sucking and pumping said melt out of the overflow chamber back into the molten bath. This rinsing cycle can be performed even when the snout has been retracted from the melt by supplying the melt from the molten bath to the overflow chamber with a delivery pump.