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Method for eliminating shape defects of wide and thick stainless steel cold-rolled sheet for decoration

A stainless steel and cold-rolled plate technology, applied in metal rolling, etc., can solve problems such as excessive speed of hot wire shot blasting head, rough pits on the surface of hot coils, thickened scale of hot coils, etc., to save development time, The effect of high-quality surface and excellent board shape foundation

Active Publication Date: 2016-05-25
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 1. The 2250 wide-width continuous rolling mill has a hot coil box for heat preservation, which causes the scale of the hot coil to thicken, and the hot coil is rough after cold rolling and phosphoric acid washing, which affects the surface of the cold rolled plate
[0007] 2. The speed of the hot-line shot blasting head is too high, and the addition of new abrasives has sharp corners. The kinetic energy of the steel grit for shot blasting is large, and it is not smooth, causing deep pits on the surface of the steel plate, resulting in rough pits on the surface of the hot coil

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Example 1: The chemical composition (mass percentage) of the wide and thick stainless steel cold-rolled plate for decoration is C≤0.08; Ni8.00-10.5; Cr18.00-20.00; Si≤0.75; Mn≤2.00; P≤0.045; S≤0.030 ; N≤0.10; specific gravity 7.93g / m 3 .

[0050] The finished specification of wide and thick stainless steel cold-rolled plate for decoration is 1500mm in width and 4mm in thickness;

[0051] The cold-rolling process of wide-thick stainless steel cold-rolled plates for decoration, including:

[0052] Annealing and pickling of hot-rolled coils—annealing and pickling of hot-rolled coils—rolling in professional rolling mills—degreasing of cold-rolled sheets—annealing of cold-rolled sheets—pickling of cold-rolled sheets—levelling—stretch leveling—shearing Straightening—inspection—packaging.

[0053] Among them, in the leveling and straightening process, the straightening tension of the straightening machine is 80000--90000kN; adjust the straightening machine according to the ...

Embodiment 2

[0081] Embodiment 2: The finished product specifications of the decorative wide-thick stainless steel cold-rolled plate of this embodiment is that the width is 2000mm, the thickness is 4mm, and the straightening tension of the straightening machine in the leveling and straightening process is 80000--90000kN; according to the specification width of the incoming material Adjust the straightening machine according to the shape of the plate before and after straightening, and adjust the tension and straightening mode and tension.

[0082] Adjust the straightening machine according to the shape of the plate before and after straightening, and adjust the principle of tension leveling: to achieve the purpose of improving the shape of the plate by controlling the extension, and ensure that the elongation rate meets the standard; the specific conditions of the incoming material must be observed roll by roll to adjust the parameters.

[0083] Tension leveling process adjustment principle...

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Abstract

The invention provides a method for eliminating plate-shaped defects of a wide and thick stainless steel cold-rolled plate for decoration. The method is characterized in that (1) the rotating speed of a blasting head of a hot line shot blasting machine is 1800rpm; (2) the temperature of a hot line plate is adjusted to 1110 DEG C and the temperature of a 4# cold line plate is adjusted to 1090 DEG C; (3) a used grinding material is only circularly utilized within first 5 hours of hot line production; (4) the first path deformation rate of a cold rolling machine is less than or equal to 21% and limited rolling speeds of the first and last paths are 200m / min; meanwhile, the requirements on roughness of an exchanged roller and a roller surface are that the glossiness is less than or equal to 0.025u; (5) the control range of straightening tension of a straightening machine is 80000-90000kN; (6) an outer ring of a steel roll is marked in an unwinding process; and (7) a corrugated board is padded at a position of first 10 meters of a steel roll winding position when a rolling machine winds, and is padded between steel plates; three pieces of corrugated paper are continually padded. By virtue of the method, the wide and thick stainless steel cold-rolled plate for high-grade decoration industries can be produced, the investment cost is reduced and the development cost is saved.

Description

technical field [0001] The invention belongs to the field of metallurgy, and in particular relates to a method for manufacturing a stainless steel wide and thick cold-rolled plate for decoration. Background technique [0002] Wide and thick stainless steel cold-rolled sheets are already conventional products in developed countries such as Europe and Japan, but they are in the development stage in my country. Except for industries such as tanks and hot-pressed templates that must use wide-width cold-rolled sheets, traditional product industries, The high-end decoration industry has also begun to gradually try to use wide cold-rolled sheets, which has led to rapid growth in the domestic wide-width cold-rolled sheet market in the past two years. [0003] As the largest stainless steel production enterprise in the world, Taiyuan Iron and Steel has a wide variety of stainless steel products. In order to meet the market demand, Taiyuan Iron and Steel has added a stainless steel wid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21C37/02B21B1/22
Inventor 梁敏诤王伟
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD