Method for controlling surface chromatic aberration of hot rolling acid-cleaning plate

A control method, hot-rolled pickling technology, applied in the direction of metal rolling, roll speed control, temperature control, etc., can solve the problems that the product cannot meet the user's requirements for surface quality, and the product qualification rate has a great influence, so as to improve the surface quality , Eliminate the effect of water mark color difference

Active Publication Date: 2010-01-06
ANGANG STEEL CO LTD
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Problems solved by technology

[0002] In the prior art, when producing hot-rolled substrate strips for hot-rolled pickling plates, descaling is usually carried out on one side of the roughing mill, and color differences similar to landscape patterns often appear on the final product. The appearance of such color differences , so that the products after pickling cannot meet the requirements of users with high requirements on surface quality, which has a great impact on the product qualification rate

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  • Method for controlling surface chromatic aberration of hot rolling acid-cleaning plate
  • Method for controlling surface chromatic aberration of hot rolling acid-cleaning plate

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Embodiment Construction

[0024] A method for controlling the surface color difference of a hot-rolled pickled plate. When producing a hot-rolled substrate, the following measures are taken:

[0025] 1) High-pressure water descaling nozzles are used on both sides of the roughing mill for descaling, and the descaling header nozzle 1 on the roughing mill inlet side and the descaling header nozzle 2 on the roughing mill outlet side are arranged in a staggered manner; the overlapping amount (D )7~10mm, vertical nozzle height (h2)150~250mm, descaling water pressure 15~25MPa;

[0026] 2) The four-roll reversible roughing mill adopts 3 to 5 passes for rolling. The high-pressure water descaling at the entrance side of the pass, the entrance side of the roughing mill is the position where the billet enters the rolling mill, and the high-pressure water descaling between the stands of the finishing rolling mill; 1st, 4th, and 5th pass high-pressure water descaling at the entrance side (high-pressure water descal...

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Abstract

The invention relates to a method for controlling surface chromatic aberration of a hot rolling acid-cleaning plate, which comprises the following steps that: a staggered arrangement mode is adopted for high-pressure water de-scaling nozzles at the inlet and the outlet of a rough mill; a four-roller reversing rough mill adopts rolling for 3 to 5 times; when the rough mill performs rolling, a mode of de-scaling by using the high-pressure water at the inlet side of the rough mill for each time is adopted; the inlet side of the rough mill is the position for steel billets to get into the rough mill; the high-pressure water de-scaling is performed between the frames of a finishing mill group; and an upstream frame of the finishing mile group adopts the high-pressure water between the frames for the de-scaling. Compared with the prior art, the method has the advantages of effectively eliminating the surface landscape pattern chromatic aberration of the hot rolling acid-cleaning plate of band steel, and improving the surface quality of the hot rolling acid-cleaning plate products.

Description

technical field [0001] The invention relates to a method for controlling surface color difference of steel for hot-rolled pickling plates. Background technique [0002] In the prior art, when producing hot-rolled substrate strips for hot-rolled pickling plates, descaling is usually carried out on one side of the roughing mill, and color differences similar to landscape patterns often appear on the final product. The appearance of such color differences , so that the products after pickling cannot meet the user requirements with higher surface quality requirements, which has a greater impact on the product qualification rate. Contents of the invention [0003] The purpose of the present invention is to provide a method for controlling the color difference of the steel surface for hot-rolled pickling plates. The method is to use descaling on both sides of the roughing mill when producing hot-rolled steel plates for pickling, and the descaling nozzles on both sides are arrang...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B45/08B21B37/74B21B37/46
Inventor 史乃安关菊丁燕勇
Owner ANGANG STEEL CO LTD
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