A dispensing device that intermittently dispenses a cooling medium onto a cast strand in a continuous casting installation. The dispensing device has a housing with at least one inlet opening for letting the cooling medium into the housing and a dispensing opening for dispensing the cooling medium out of the housing. A switching valve is arranged in the housing and is designed to open and close the dispensing opening. The switching valve has a sleeve, which is filled with a working fluid and which, on the dispensing opening side, is closed with a closure in a fluid-tight manner. The closure has a switching element, which, by controlling the pressure in the working fluid, is displaceable relative to the sleeve into a closing position in which the switching element closes the dispensing opening.

A dispensing device that intermittently dispenses a cooling medium onto a cast strand in a continuous casting installation. The dispensing device has a housing with at least one inlet opening for letting the cooling medium into the housing and a dispensing opening for dispensing the cooling medium out of the housing. A switching valve is arranged in the housing and is designed to open and close the dispensing opening. The switching valve has a sleeve, which is filled with a working fluid and which, on the dispensing opening side, is closed with a closure in a fluid-tight manner. The closure has a switching element, which, by controlling the pressure in the working fluid, is displaceable relative to the sleeve into a closing position in which the switching element closes the dispensing opening.

Provided in the present application are a corrosion-resistant alloy steel bar and a preparation method therefor, wherein the corrosion-resistant alloy steel bar comprises, in percentage by weight: 0.05-0.25% of C, 1.05-2% of Si, 0.3-1.5% of Mn, 0.5-2.5% of Cr, 0.05-1% of Ni, 0.001-0.005% of O, 0.001-0.0035% of S, 0.005-0.1% of Ti, 0.005-0.1% of Al, 0.005-0.03% of V, and 0.005-0.03% of Nb, with the balance being Fe and inevitable impurities. The preparation method therefor comprises the successive steps of smelting, refining, continuous casting, rolling and cooling. In the present application, elements such as Si, Ti, Al and Mn are used for compensating for the reduction in corrosion resistance caused by a decrease in the content of Cr, such that the production cost of the corrosion-resistant alloy steel bar are greatly reduced.

Provided in the present application are a corrosion-resistant alloy steel bar and a preparation method therefor, wherein the corrosion-resistant alloy steel bar comprises, in percentage by weight: 0.05-0.25% of C, 1.05-2% of Si, 0.3-1.5% of Mn, 0.5-2.5% of Cr, 0.05-1% of Ni, 0.001-0.005% of O, 0.001-0.0035% of S, 0.005-0.1% of Ti, 0.005-0.1% of Al, 0.005-0.03% of V, and 0.005-0.03% of Nb, with the balance being Fe and inevitable impurities. The preparation method therefor comprises the successive steps of smelting, refining, continuous casting, rolling and cooling. In the present application, elements such as Si, Ti, Al and Mn are used for compensating for the reduction in corrosion resistance caused by a decrease in the content of Cr, such that the production cost of the corrosion-resistant alloy steel bar are greatly reduced.

The mould contains a casting wheel, on the outer surface of which an open channel is made, a continuous tape adjacent to the casting wheel from its outer surface in such a way as to close the specified open channel, as well as a cooling system able of adjustable supply of coolant to the casting wheel and the continuous tape at least on the outer surface, on the inner surface and on both side surfaces of the wheel, in which the ratio of the coolant flow on the inner surface of the wheel to the coolant flow on the outer surface of the wheel is 1.9-3.0, and the ratio of the total coolant flow on the side surfaces of the casting wheel to the coolant flow on the inner surface of the casting wheel is 1.3-1.7.

The mould contains a casting wheel, on the outer surface of which an open channel is made, a continuous tape adjacent to the casting wheel from its outer surface in such a way as to close the specified open channel, as well as a cooling system able of adjustable supply of coolant to the casting wheel and the continuous tape at least on the outer surface, on the inner surface and on both side surfaces of the wheel, in which the ratio of the coolant flow on the inner surface of the wheel to the coolant flow on the outer surface of the wheel is 1.9-3.0, and the ratio of the total coolant flow on the side surfaces of the casting wheel to the coolant flow on the inner surface of the casting wheel is 1.3-1.7.

A continuously cast slab that can prevent thermal cracking during cooling therefor even if the toughness of the slab is low, and a method for producing the same. Specifically, provided is a continuously cast slab for high-strength steel with features such that the average prior austenite grain size at a position of 10 mm from the surface layer of the continuously cast slab is in the range of 0.5 mm to 2.0 mm; and in the microstructure of the slab, the total area ratio of bainite and ferrite is 90% more, and the area ratio of ferrite is 0%, or 3% or more.

A continuously cast slab that can prevent thermal cracking during cooling therefor even if the toughness of the slab is low, and a method for producing the same. Specifically, provided is a continuously cast slab for high-strength steel with features such that the average prior austenite grain size at a position of 10 mm from the surface layer of the continuously cast slab is in the range of 0.5 mm to 2.0 mm; and in the microstructure of the slab, the total area ratio of bainite and ferrite is 90% more, and the area ratio of ferrite is 0%, or 3% or more.

A continuous caster to cast a metal product has a plurality of upper and lower segment frames bearing rolls, the upper and lower segment frames being located respectively above and below the cast metal product. At least one bending measurer is located on at least one of the upper segment frames and able to emit a bending measurement signal indicative of a bending of the at least one of the upper segment frames. A processor is disposed to receive the bending measurement signal and to calculate a location Pmes of the crater end based on the measured bending signal, the crater end location being the location.

A continuous caster to cast a metal product has a plurality of upper and lower segment frames bearing rolls, the upper and lower segment frames being located respectively above and below the cast metal product. At least one bending measurer is located on at least one of the upper segment frames and able to emit a bending measurement signal indicative of a bending of the at least one of the upper segment frames. A processor is disposed to receive the bending measurement signal and to calculate a location Pmes of the crater end based on the measured bending signal, the crater end location being the location.