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Method for treating thick cold-rolled flat steel coil defective products

A treatment method and thick-gauge technology, applied in heat treatment furnaces, heat treatment equipment, furnace types, etc., can solve problems affecting corporate profits and achieve the effect of improving the pass rate

Active Publication Date: 2017-09-22
内蒙古包钢稀土钢板材有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

A large number of defective products directly affect the profit of the enterprise

Method used

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  • Method for treating thick cold-rolled flat steel coil defective products
  • Method for treating thick cold-rolled flat steel coil defective products
  • Method for treating thick cold-rolled flat steel coil defective products

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Embodiment Construction

[0020] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0021] In a specific embodiment, the present invention provides a method for processing defective products of thick-gauge cold-rolled flat steel coils, which is processed according to the following corresponding methods according to the defect types of thick-gauge cold-rolled flat steel coils:

[0022] Case a), the yield strength of the steel coil is greater than the upper limit: After the steel coil is washed off the surface anti-rust oil and leveling liquid on the cleaning line, it is annealed in the bell annealing furnace again, and the holding time is extended for 4 hours based on the original annealing process, and then Smoothness; thereby effectively reducing the yield strength and improving the pass rate of cold rolling. Plea...

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Abstract

The invention discloses a method for treating thick cold-rolled flat steel coil defective products. The defective products are treated by the corresponding method according to defect types of thick cold-rolled flat steel coils; and after the defective products are treated by the method provided by the invention, the yield of the cold-rolled products can be improved to the fullest extent possible by existing equipment of a cold-rolling production line.

Description

technical field [0001] The invention relates to the technical field of iron and steel production, in particular to a method for processing defective products of thick-gauge cold-rolled flat steel coils. Background technique [0002] In the current sheet production process, cold-rolled sheets have very strict requirements on surface quality and stamping performance. Generally speaking, the surface quality of cold-rolled products is divided into three levels according to the surface defects: ordinary surface quality, higher surface quality and advanced surface quality. In addition, some cold-rolled coils that did not meet minimum surface quality standards were judged to be downgraded. A large number of defective products directly affect the profits of enterprises. Contents of the invention [0003] In order to solve the above technical problems, the present invention provides a method for processing defective products of thick-gauge cold-rolled flat steel coils. [0004] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C37/02C21D9/67C23G1/19C25F1/06
CPCB21C37/02C21D9/67C23G1/19C25F1/06
Inventor 韩玉龙
Owner 内蒙古包钢稀土钢板材有限责任公司