A method and device for continuous annealing of cold-rolled sheet
A cold-rolled sheet and annealing technology, which is applied to heat treatment equipment, furnaces, heat treatment furnaces, etc., can solve problems such as warping and other problems, and achieve the effect of not affecting production
Active Publication Date: 2018-06-22
SHOUGANG JINGTANG IRON & STEEL CO LTD
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Problems solved by technology
[0003] By providing a method and device for continuous annealing of cold-rolled sheets, the present invention solves the technical problem in the prior art that the cold-rolled sheets are prone to buckling by changing the operating speed to control the annealing degree during the continuous annealing when the specifications are changed.
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Embodiment Construction
[0035] In order to solve the technical problem in the prior art that the cold-rolled sheet is prone to buckling by changing the operating speed to control the annealing degree during continuous annealing when changing specifications, the present invention provides a method and device for continuous annealing of cold-rolled sheet.
[0036] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0037] Embodime...
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The invention relates to the technical field of metal smelting, in particular to a continuous annealing method and device of cold-rolled sheets. The continuous annealing method comprises the steps of determining the thickness change between a first cold-rolled sheet and a second cold-rolled sheet which are subjected to annealing in sequence; when steel strip weld joints between the first cold-rolled sheet and the second cold-rolled sheet are conveyed to an inlet loop section of an annealing unit, adjusting the annealing temperature from the current first annealing temperature to second annealing temperature according to the thickness change between the first cold-rolled sheet and the second cold-rolled sheet; and when the steel strip weld joints are conveyed to a heating section of the annealing unit, adjusting the annealing temperature from the second annealing temperature to the first annealing temperature. According to the continuous annealing method, the annealing degree can be controlled under the condition that the running speed is not changed, the first cold-rolled sheet and the second cold-rolled sheet do not buckle, the sheet circulation stability is not influenced, and the yield is not influenced.
Description
technical field [0001] The invention relates to the technical field of metal smelting, in particular to a method and device for continuous annealing of cold-rolled thin plates. Background technique [0002] The continuous annealing unit is an important link in the production of cold-rolled strip steel. It has a series of advantages such as short process, high output, and good product quality. It is an indispensable annealing equipment. With the continuous increase of product varieties and specifications, the speed of the annealing furnace, the temperature of the strip steel, and the hourly output have been changing. Generally, strip steel with a thickness greater than 0.9mm is a thick material, and strip steel with a thickness less than or equal to 0.9mm is a thin material. Since the heating output power of the thick steel strip has reached 100% during production, the speed reduction measures can only be taken according to the principle of equal hourly output to control the...
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IPC IPC(8): C21D1/26C21D9/52C21D11/00
CPCC21D1/26C21D9/52C21D11/00
Inventor 陈文武任伟超郑晓飞刘顺明王道金李冠雄韩邦才余涛郑海燕
Owner SHOUGANG JINGTANG IRON & STEEL CO LTD