Method for controlling mechanical properties of cold-rolling strip steel in online manner

A technology of mechanical properties and cold-rolled strip steel, which is applied in the direction of rolling mill control device, rolling force/roll gap control, metal rolling, etc., and can solve problems such as inability to immediately detect strip steel, discontinuity, etc.

Active Publication Date: 2013-01-23
BAOSHAN IRON & STEEL CO LTD
View PDF6 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mechanical performance parameters obtained through offline testing can only be used to guide production process adjustment or material composition adjustment, and the strip steel needs to be removed from the production line, and then the specific performance testing can not be performed on the strip steel on the production line. immediate detection;
[0006] 2. Discontinuity
The traditional off-line detection method can only sample the head or tail of the coiled steel strip under normal circumstances, and cannot guarantee that the mechanical performance indicators of the strip steel in the length direction of the entire coil are within the required range

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for controlling mechanical properties of cold-rolling strip steel in online manner
  • Method for controlling mechanical properties of cold-rolling strip steel in online manner
  • Method for controlling mechanical properties of cold-rolling strip steel in online manner

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0095] For products that require relatively high precision control of strip tensile strength, such as high-strength cold-rolled automotive sheets, combined with Figure 7 , the implementation steps and implementation methods of the strip steel tensile strength automatic control will be described in detail below. Proceed as follows:

[0096] (1) Determination of strip tensile strength deviation

[0097] The measured value σ of the strip tensile strength obtained by the mechanical performance tester 5 b_act Subtract the set tensile strength target value σ b_ref , get strip tensile strength deviation value Δσ b :

[0098] Δσ b = σ b_act -σ b_ref

[0099] where Δσ b is the strip hardness deviation value

[0100] σ b_ref The target value of strip tensile strength set for is obtained from the process control computer L2 of the unit and determined according to the requirements of downstream users for the product.

[0101] (2) Determine the strip leveling tension adjustmen...

Embodiment 2

[0144] For cold-rolled steel strip products such as tinplate, etc., which require relatively high precision in strip hardness control, with reference to Figure 9, the implementation steps and methods of automatic control of strip hardness will be described in detail below. Proceed as follows:

[0145] (1) Determination of strip hardness deviation

[0146] The measured value H of the strip hardness obtained by the mechanical property detector 5 act Subtract the set hardness target value H ref , to get the strip hardness deviation value ΔH:

[0147] ΔH=H act -H ref

[0148] In the formula, ΔH is the deviation value of strip hardness

[0149] h ref The target value of strip hardness set for , comes from the process control computer L2 of the unit, and is determined according to the requirements of downstream users for products.

[0150] (2) Determine the strip leveling tension adjustment amount:

[0151] For strips with thinner thickness, since adjusting the leveling ten...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Login to view more

Abstract

The invention relates to a method for controlling the mechanical properties of cold-rolling strip steel in an online manner. The method overcomes the shortage of the current conventional method for monitoring the mechanical properties of the strip steel by inspecting casually and sampling, analyzing and testing in an offline manner and adjusting the production process or material components in the online manner, and reduces the fluctuations of the mechanical properties of the strip steel. The method for controlling the mechanical properties of the strip steel in the online manner is based on a continuous hot dip galvanizing machine set or a continuous annealing machine set of the cold-rolling strip steel and is realized by testing the mechanical properties of the strip steel in the online manner and timely adjusting production process parameters such as flat elongation, annealing heating temperature or annealing cooling speed and the like according to a deviation between a mechanical property testing value and a target value. The method can improve the control accuracy of the mechanical properties of the cold-rolling strip steel and satisfy the requirements of downstream users in a better manner.

Description

technical field [0001] The present invention relates to the technical field of strip cold rolling, in particular to a method for controlling the mechanical properties of cold-rolled strip, and more specifically, to an on-line control method for the mechanical properties of cold-rolled strip. Background technique [0002] Cold-rolled steel strip has the advantages of smooth surface, high dimensional accuracy and good mechanical properties. Most of the products are coiled, and a large part of them are processed into coated steel plates before leaving the factory. The coiled cold-rolled sheet has high production efficiency, is easy to use, and is beneficial to subsequent processing. Therefore, it is widely used and has gradually replaced hot-rolled sheets of the same thickness. Among them, for steel mills, the technical requirements for strip mechanical properties parameters (such as yield strength, tensile strength, elongation at break, and hardness, etc.) are generally consi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B21B37/00B21B37/48B21B37/58B21B37/74B21B38/00
Inventor 顾廷权王骏飞薛栋梁
Owner BAOSHAN IRON & STEEL CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap