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Method for preventing hot rolled reel from being flattened

A technology of hot-rolled coils and flat coils, applied in metal rolling, metal rolling, manufacturing tools, etc., which can solve problems such as difficult industrial utilization, low production efficiency, and complicated operation, so as to reduce the phenomenon of flat coils and increase coiling The effect of pressure, easy operation

Active Publication Date: 2018-03-20
CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is: the existing methods for preventing flat coils of hot-rolled coils are either complex in operation, low in production efficiency, or increase in cost, and are difficult to be industrially utilized

Method used

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  • Method for preventing hot rolled reel from being flattened
  • Method for preventing hot rolled reel from being flattened

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Embodiment Construction

[0016] The present invention provides a method for preventing flat coils of hot-rolled coils, comprising the following steps:

[0017] After the hot-rolled strip is cooled by laminar flow, it is rapidly cooled to 650-700°C or 500-550°C for coiling, and the hot-rolled steel coil after coiling stays on the coiler for 5-20s; the coiling tension is relatively high Regular crimp tension increased by 5-10%.

[0018] When the steel plate is crimped, the flat coil usually occurs within 30s after coiling. The present invention especially prolongs the time for the steel plate to be rolled on the reel, and stays for 5-20s after crimping, so that it can be effectively rolled on the reel. Under the action of support, the generation of flat roll can be suppressed. Directly prolonging the residence time, the operation is simple and convenient, and the effect of significantly reducing the flat roll rate can be achieved, and the cost reduction effect is obvious.

[0019] On the other hand, t...

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Abstract

The invention belongs to the technical field of high-strength steel and particularly relates to a method for preventing a hot rolled reel from being flattened. The problems that as for an existing method for preventing a hot rolled reel from being flattened, either operation is complex and the production efficiency is low, or the cost is increased and industrial utilization is difficult are solved. The method for preventing the hot rolled reel from being flattened comprises the following steps that hot-rolled strip steel is subjected to laminar cooling and rapidly cooled to be 650-700 DEG C or500-550 DEG C to be reeled, and the reeled hot-rolled steel reel is stopped on a reeling machine for 5-20 s; and reeling tension is increased by 5-10% than regular reeling tension. According to the method for preventing the hot rolled reel from being flattened, the problem that the hot-rolled strip steel is flattened and subsides after being reeled can be effectively solved, normal implementationof subsequent unreeling technique is ensured, and the method for preventing the hot rolled reel from being flattened is easy to implement and obvious in cost advantage and has removable economic andsocial benefits.

Description

technical field [0001] The invention belongs to the technical field of high-strength steel, and in particular relates to a method for preventing hot-rolled coils from flattening. Background technique [0002] With the development of automobile lightweight technology, it has become an inevitable trend for automobile steel to develop towards high-strength steel. High-strength steel such as dual-phase steel has the characteristics of low yield strength, high tensile strength and excellent plasticity, and has become the steel of choice for high-strength steel for automobiles. Its consumption is expected to exceed 70% of advanced high-strength steel for automobiles. In the production process of high-strength steel, defects of flat coil or collapse often appear after hot rolling and coiling, especially for products with a thickness of ≤3.0mm, the phenomenon of flat coil collapse is more serious, which greatly affects the subsequent uncoiling process . [0003] Patent CN 10233568...

Claims

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Application Information

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IPC IPC(8): B21B15/00C22C38/02C22C38/04C22C38/06C22C38/18C22C38/12C22C38/14C22C38/22C22C38/24C22C38/26C22C38/28C22C38/38
CPCB21B15/00B21B2015/0057C22C38/02C22C38/04C22C38/06C22C38/12C22C38/14C22C38/18C22C38/22C22C38/24C22C38/26C22C38/28C22C38/38
Inventor 邝春福郑之旺郑昊青余灿生
Owner CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
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