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Preparation technology of hot-rolled galvanized plate

A preparation process and hot-rolled sheet technology, applied in hot-dip galvanizing process, metal material coating process, coating, etc., to reduce the formation of scratches, prevent surface defects, and improve quality

Inactive Publication Date: 2014-12-17
WUXI LIANCHUANG SHEET
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem mainly solved by the present invention is to provide a preparation process of hot-rolled galvanized sheet, which is not prone to surface defects, greatly reduces the probability of scratches and embossed quality defects on the galvanized sheet, and improves the quality of the product

Method used

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Embodiment Construction

[0015] The following will clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0016] Embodiments of the invention include:

[0017] A preparation process for a hot-rolled galvanized sheet, comprising the following steps:

[0018] (1) Preparation of hot-rolled sheet: heating the substrate, and then rough rolling and finishing rolling to obtain hot-rolled sheet;

[0019] (2) Hot-rolled sheet pretreatment: pickling and rinsing cleaning treatment for hot-rolled sheets;

[0020] (3) Preparation of galvanizing solution: the weight percentage of chemical components in the galvanizing solution is al...

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Abstract

The invention discloses a preparation technology of a hot-rolled galvanized plate, which comprises the following steps: preparing a hot-rolled plate: heating a baseplate, and roughly rolling and finely rolling the baseplate to obtain the hot-rolled plate; pre-processing the hot-rolled plate: cleaning the hot-rolled plate by acid pickling and rinsing; preparing a galvanizing solution which comprises the following chemical constituents in percentage by weight: 0.2-0.4 percent of aluminium, 0-0.175 percent of antimony and zinc in balancing amount; conducting hot galvanizing after annealing, wherein the annealing temperature is 740 DEG C, temperature is controlled according to the trapezoidal curve of the baseplate heating temperature when the plate face of the hot-rolled plate is heated, the temperature of the galvanized plate ranges from 405 DEG C to 465 DEG C, and the temperature of a zinc bath is 460 DEG C; conducting cooling after galvanizing the hot-rolled plate. The preparation technology is not liable to cause surface defects, greatly reduces the probability of scratching and impressing quality defects of the galvanized plate, and improve the product quality.

Description

technical field [0001] The invention relates to the field of galvanized sheets, in particular to a preparation process of hot-rolled galvanized sheets. Background technique [0002] The hot-rolled galvanized sheet uses the hot plate as the substrate and is directly galvanized after pickling. Compared with the traditional galvanized sheet, it has an obvious price advantage due to the lack of cold rolling process. It is used in construction, automobile manufacturing, and steel silos. Manufacturing, railway passenger car manufacturing, highway guardrail, manufacturing and other industries have good development prospects. [0003] However, the current hot-rolled galvanized sheet is prone to surface defects, and the galvanized sheet forms quality defects such as scratches and embossing, which reduces the quality of the product. Contents of the invention [0004] The technical problem mainly solved by the present invention is to provide a preparation process of hot-rolled galva...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C2/06C23C2/40
Inventor 王士新
Owner WUXI LIANCHUANG SHEET
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