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Method for controlling surface rolling lines of cold-rolled deep-drawing steel for outer plate

A control method and deep drawing technology, applied in heat treatment process control, manufacturing tools, heat treatment equipment, etc., can solve problems such as inapplicability, achieve the effect of eliminating tendency and improving surface density

Pending Publication Date: 2022-03-15
SD STEEL RIZHAO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent method can alleviate the surface rolling grain defects of galvanized deep-drawing steel to a certain extent, but it is not suitable for the cold-rolled deep-drawing steel produced by continuous annealing as described in this patent

Method used

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  • Method for controlling surface rolling lines of cold-rolled deep-drawing steel for outer plate
  • Method for controlling surface rolling lines of cold-rolled deep-drawing steel for outer plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The slab is smelted according to the composition of conventional DC04 cold-rolled deep-drawing steel, and the head and tail billets are changed to obtain a steel billet with a thickness of 230mm and a width of 1850mm. Lubricated rolling process, roll period and reduction in hot continuous rolling process, roll period, surface roughness and reduction in acid continuous rolling process, roll surface roughness, peak number, roll diameter difference and pass leveling force in continuous annealing process and other parameters are controlled to improve the surface texture of the finished product. The specific steps are as follows:

[0029] (1) The hot continuous rolling process adopts seven-stand continuous rolling, and the F2~F6 stands are put into rolling lubrication. 30ml / min, the oil volume of the upper rack of F6 is set to 30ml / min, and the oil volume of the lower rack is set to 35ml / min; the roughness of the upper machine of the F7 working roll is 0.81μm; the reduction ...

Embodiment 2

[0036] The slab is smelted according to the composition of conventional DC06 cold-rolled deep-drawing steel, and the head and tail billets are changed to obtain a steel billet with a thickness of 230mm and a width of 1850mm. Lubricated rolling process, roll period and reduction in hot continuous rolling process, roll period, surface roughness and reduction in acid continuous rolling process, roll surface roughness, peak number, roll diameter difference and pass leveling force in continuous annealing process And other parameters are controlled to improve the surface texture of the finished product. The specific steps are as follows:

[0037] (1) The hot continuous rolling process adopts seven-stand continuous rolling, and the F2-F6 stands are put into rolling lubrication. 30ml / min, the oil volume of the upper rack of F6 is set to 30ml / min, and the oil volume of the lower rack is set to 35ml / min; the roughness of the upper machine of the F7 working roll is 0.79μm; the reduction ra...

Embodiment 3

[0044] The slab is smelted according to the composition of conventional DC03 cold-rolled deep-drawing steel, and the head and tail billets are changed to obtain a steel billet with a thickness of 230mm and a width of 1500mm. Lubricated rolling process, roll period and reduction in hot continuous rolling process, roll period, surface roughness and reduction in acid continuous rolling process, roll surface roughness, peak number, roll diameter difference and pass leveling force in continuous annealing process and other parameters are controlled to improve the surface texture of the finished product. The specific steps are as follows:

[0045] (1) The hot continuous rolling process adopts seven-stand continuous rolling, and the F2~F6 stands are put into rolling lubrication. 30ml / min, the oil volume of the upper rack of F6 is set to 30ml / min, and the oil volume of the lower rack is set to 35ml / min; the roughness of the upper machine of the F7 working roll is 0.77μm; the reduction ...

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Abstract

The invention relates to the technical field of metal material machining, in particular to a control method for surface rolling lines of cold-rolled deep-drawing steel for an outer plate. According to the control method, in the cold rolling deep drawing steel production process, the lubricating rolling technology, the roller period and pressing of the hot continuous rolling procedure, the roller period and surface roughness and pressing of the acid continuous rolling procedure, and the roller surface roughness, the peak value number, the roller diameter difference and the through plate leveling force of the continuous annealing procedure are controlled. The control method can improve the surface texture of the cold-rolled deep-drawing steel to obtain a target finished steel coil.

Description

technical field [0001] The invention relates to the technical field of metal material processing, in particular to a method for controlling rolling marks on the surface of cold-rolled deep-drawing steel for outer plates. Background technique [0002] Cold-rolled deep-drawing steel (interstitial-free steel) with good deep-drawing form is widely used in industrial fields such as automobiles and home appliances. Especially when used to manufacture outer panels with high requirements such as automobile outer panels and household appliance outer panels, cold-rolled deep-drawing steels are also required to have excellent surface quality, that is, the zero-defect surface generally speaking in the steel industry. [0003] As a common and stubborn surface quality defect, surface longitudinal rolling lines (also known as surface rolling lines) have caused a lot of trouble and economic losses to steel manufacturers for outer plates and downstream customer processing plants. For iron a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D8/02C21D1/26C21D11/00
CPCC21D8/0205C21D8/0221C21D8/0247C21D1/26C21D11/00
Inventor 王乐高兴昌陈晓潇王栋丁紫正张冲冲朱信成梁亚刘精华许铭李贺王兴
Owner SD STEEL RIZHAO CO LTD
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