Method for using thin slab continuous casting and rolling technology for producing thin-specification, low-alloy and high-strength steel

A thin-slab continuous casting and thin-gauge technology, applied in the direction of rolls, metal rolling, manufacturing tools, etc., can solve the problems of excessive thickness, wear, and adverse effects on the mechanical properties of strip steel, so as to reduce production costs and improve dimensional accuracy Effect
CN106734201AActive Publication Date: 2017-05-31WISDRI ENG & RES INC LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
WISDRI ENG & RES INC LTD
Publication Date
2017-05-31

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Abstract

The invention relates to a method for using a thin slab continuous casting and rolling technology for producing thin-specification, low-alloy and high-strength steel. Molten steel is continuously cast into a continuous casting blank with the width being 1300 mm to 1600 mm and the thickness being 65 mm to 96 mm; then rough rolling, heat insulation cover heat insulation, induction heating, high-pressure water scale removing and finish rolling are conducted in sequence, and ultrathin strip steel with the width being 1300 mm to 1600 mm and the thickness being 1.3 mm to 1.6 mm is obtained; and finally the strip steel is controlled to be cooled, shorn in different rolled and are coiled into rolls. The yield strength of the thin-specification double-phase steel finished product ranges from 380 MPa to 430 MPa, the tensile strength ranges from 530 MPa to 610 MPa, and the elongation is larger than or equal to 25%. By means of the method, stable production of hot rolled thin-specification, low-alloy and high-strength steel with the thickness being 1.3 mm to 1.6 mm can be achieved, the size precision, the plate shape precision and the comprehensive mechanical performance are improved, the requirement for replacing cold with hot is met, and the production cost is reduced.
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Description

technical field

[0001] The invention relates to the technical field of hot rolling, in particular to a method for producing thin-gauge low-alloy high-strength steel by applying a thin slab continuous casting and rolling process. Background technique

[0002] The technical route of the newly developed thin slab continuous casting and rolling process at home and abroad is: continuous casting - rough rolling - shearing - heat preservation - induction heating - descaling - finishing - controlled cooling - shearing - coiling. Compared with the traditional thin slab continuous casting and rolling process, this process can produce hot-rolled strip with thinner thickness, and the product can realize "replacing cooling with heat", thereby reducing energy consumption and production cost to a greater extent, so it has Broad market prospects.

[0003] At present, the thickness of low-alloy high-strength steel products produced by this process can reach 1.3 to 1.6mm, which is already an...

Claims

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