Hoogovens Staal B.v.

Hoogovens Groep B.v.

Corus Staal Bv

Corus Technology B.v.

Corus Staal

Huibert W Den Hartog

Erik B Van Perlstein

Hendrikus K Meijer

Marcus Cornelis Maria Cornelissen

Cornelis Pronk

Aldricus Maria Groot

Gijsbertus C Van Haastrecht

Robert F Gadellaa

Marcus Cornelis Cornelissen

Process for producing a steel strip or sheet, in which liquid steel is cast in a continuous-casting machine to form a thin plate and, while making use of the casting heat, is fed through a furnace device, is roughed in a roughing stand to a pass-over thickness and is rerolled in a finishing rolling stand to form a steel strip or sheet of the desired final thickness, in which (a) to produce a ferritically rolled steel strip, the strip, the plate or a part thereof is fed without interruption at least from the furnace device, at speeds which essentially correspond to the speed of entry into the roughing stand and the following reductions in thickness, from the roughing stand to a processing device which is disposed downstream of the finishing rolling stand, the strip coming out of the roughing stand being cooled to a temperature at which the steel has an essentially ferritic structure; (b) to produce an austenitically rolled steel strip, the strip coming out of the roughing roll is brought to or held at a temperature in the austenitic range, and in the finishing rolling stand it is rolled to the final thickness essentially in the austenitic field and is then cooled, after this rolling, to the ferritic field.

Process and device for producing a steel strip or sheet

Method for the manufacture of a steel strip, wherein molten steel is cast into a slab, conveyed through a furnace, roughed in a roughing apparatus and finish-rolled in a finishing apparatus. The method comprises an endless or semi-endless process having either step a or step b, wherein a and b respectively comprise (a) manufacturing a ferritically rolled steel strip, wherein the slab is rolled in the roughing apparatus in the austenitic range and then cooled to a ferritic structure, and wherein the strip is rolled in the finishing apparatus at speeds essentially corresponding to the entry speed into the finishing apparatus, and (b) manufacturing an austenitically rolled steel strip, wherein the strip leaving the roughing apparatus is heated to the austenitic range and is rolled in the finishing apparatus and then cooled down to the ferritic range. In both step a and b, there is no material connection between the steel in the continuous casting machine and the steel being rolled in the finishing apparatus, and the strip is fed from the roughing apparatus to the finishing apparatus without intermediate storage. Additional steps include cutting the ferritically or austenitically rolled strip, after reaching the desired finished thickness, to portions of the desired length, and coiling the cut portions.

Method and apparatus for the manufacture of a steel strip

Continuous casting machine for the casting of a thin slab with a thickness of less than 150 mm comprising a vacuum tundish having a first atmospheric chamber (,) and a second low pressure or vacuum chamber (,) hydraulically connected to the first chamber and purging means (,) for introducing a purging gas into the liquid steel after it has entered the first chamber but before it entered the second chamber.

Method and apparatus for the manufacture of formable steel

Method of manufacturing a deep-drawing steel strip or sheet

Method for the manufacture of a strip of formable steel

A plant for a smelting reduction process for pig iron production using coal and oxygen-containing gas is obtained by converting an existing blast furnace plant by replacing the blast furnace by apparatus including at least one metallurgical vessel for carrying out the smelting reduction process, while retaining at least partly at least one of the following components of the existing blast furnace plant:

Method and apparatus for producing pig iron by smelting reduction and

A process for producing molten pig iron uses direct reduction of iron ore in a pre-reduction stage followed by a final reduction stage. In the pre-reduction stage iron ore is pre-reduced in a melting cyclone by means of a reducing process gas originating from the final reduction stage. A post-combustion occurs in the reducing process gas in the melting cyclone so that said iron ore in said melting cyclone is at least partly melted. The partly melted iron ore passes downwardly into a metallurgical vessel situated beneath the cyclone in which the final reduction takes place by supply of coal and oxygen, thereby forming a reducing process gas. A partial post-combustion occurs in the reducing process gas in the metallurgical vessel by means of said oxygen supplied thereto. The post-combustion ratio of the gas on exiting the metallurgical vessel is not more than 0.55. The coal is supplied directly into the slag layer so that said partial post-combustion in said metallurgical vessel is at least partly effected in the slag layer.

Process and apparatus for producing molten pig iron

Process for producing molten pig iron with melting cyclone

In the manufacture of a silicon-containing iron sheet for electrical applications consisting of 0.1-8% by weight Si, optionally up to 1% by weight Al, remainder iron and unavoidable impurities, iron sheet is made by electrodeposition, and silicon or a silicon-containing material is incorporated in the electro-deposited iron sheet. The silicon-containing material may be included in the electrolyte, becoming embedded during the electro-deposition in the iron sheet. The method can be performed without a step of thickness reduction of the iron sheet made by electro-deposition. The sheet is annealed to homogenize the silicon content.

Silicon-containing iron sheet for electrical applications and methods

In the manufacture of formable steel in the form of a strip with a final thickness of between 0.5 and 1.5 mm, in a number of continuous successive process stages, molten steel is continuously cast into a slab of less than 100 mm thickness and the slab is rolled into the strip. To simplify the apparatus required, and improve process control, the slab is cooled down to a rolling temperature of between 300.degree. C. and a temperature T.sub.t at which at least 75% of the material is converted into ferrite, and the rolling of the slab into strip comprises at least one reduction stage with a thickness reduction of over 30%. The rolling exit speed is less than 1000 m/min. After recrystallization, the strip is coiled.

Method for the manufacture of formable steel

A non-ageing low-alloy hot-rolled strip-form formable steel has a carbon content of between 0.02 and 0.10 wt. % and a thickness of between 0.5 and 5.0 mm. In order to bind N so as to achieve a non-ageing steel, while permitting direct entry of the steel to rolling from casting, the contents of titanium, nitrogen and sulphur in wt. % satisfy the conditions:

Non-ageing low-alloy hot-rolled strip-form formable steel

In the manufacture of formable steel strip having a thickness between 0.5 and 1.5 mm, the following process steps are performed sequentially in a continuous process:

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Noordwijkerhout, Netherlands

Huibert W Den Hartog