Cold-rolled steel plate production method
A cold-rolled steel plate and production method technology, applied in the direction of metal rolling, can solve the problems of long annealing cycle, high energy consumption, unstable product quality, etc., and achieve the effect of shortening the annealing cycle and prolonging the service life
Active Publication Date: 2012-12-12
MAGANG (GROUP) HOLDING CO LTD +1
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Problems solved by technology
In this way, in order to obtain the required mechanical properties and processing properties, cold rolling cycle annealing (bell furnace) makes the actual annealing cycle long, energy consumption is high, and equipment is easily damaged
And because the continuous casting and hot rolling process does not conform to the "three highs and one low" process formulation, the quality of the produced products is also unstable
Method used
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[0013] Below with reference to the accompanying drawings, through the description of the embodiments, the specific embodiments of the present invention, such as the shape, structure, mutual position and connection relationship between the various parts, the role and working principle of the various parts, etc., will be further described. Detailed instructions:
[0014] as attached figure 1 As shown, the present invention is a production method of cold-rolled steel plate. The cold-rolled steel plate is formed into a cast slab by continuous casting and rolling of molten steel, and the cast slab is heated and hot-rolled to form a steel coil. The steel coil is When processed into cold-rolled steel sheets, it also includes periodic annealing after pickling and cold rolling. When the steel coils are periodically annealed, the temperature of the heating gas during annealing is controlled between 650 and 710°C. The temperature is controlled between 580-660°C, and the holding time is ...
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Abstract
The invention provides a cold-rolled steel plate production method applicable to the technical field of steel plate production. The production method comprises the following steps: carrying out continuous casting and continuous rolling on molten steel to form a hot-rolled steel coil, and carrying out acid cleaning, cold rolling and cyclic annealing treatment, wherein in the steel coil cyclic annealing process, the heating gas temperature is controlled at 650-710 DEG C, the annealing temperature is controlled at 580-660 DEG C, and the holding time is controlled at 1-6 hours. The cold-rolled steel plate production method provided by the invention shortens the annealing cycle by 8-27% on the premise of basically keeping the mechanical properties and processability of the product unchanged, and meanwhile, obviously prolongs the service life of steel plate processing equipment and components thereof.
Description
technical field [0001] The invention belongs to the technical field of steel plate production, and more specifically relates to a production method of cold-rolled steel plate. Background technique [0002] The process of modern production of thin metal strips is to obtain the required thickness, high dimensional accuracy and desired performance through pickling and cold rolling thinning of thicker hot-rolled steel plates. Due to the work hardening of the metal caused by the cold rolling process, the mechanical properties and processing properties are poor, and annealing heat treatment is required to obtain good comprehensive properties. Traditionally, hot-rolled steel coils for cold-rolled steel plates are continuously cast into billets with a thickness of about 200mm after smelting qualified molten steel. The cooled billets are heated at 1250°C in a heating furnace, then hot-rolled to a specified thickness, and cooled , coiling. Traditionally, for cold-rolled annealed ste...
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IPC IPC(8): C21D8/02B21B1/46C22C38/00
Inventor 裴陈新何宁程书生裴英豪司小明施立发
Owner MAGANG (GROUP) HOLDING CO LTD