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Galvanized steel sheet coating material and its production method

A technology of galvanized steel sheet and production method, applied in the direction of metal material coating process, coating, etc., can solve the problems of cracking, poor corrosion resistance, coating peeling, etc.

Inactive Publication Date: 2008-01-16
JIANGSU LINLONG NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the lack of aluminum (Al), silicon (Si), and rare earth (Re) elements in the existing coating material structure, there is a certain gap between its performance and the requirements of the coated steel sheet (strip) for the coating material, mainly in The following aspects: 1. Due to the lack of aluminum (Al), its long-lasting corrosion resistance is average, and the service life of the steel plate (strip) after plating is about ten years; and the high temperature (300 ° C) corrosion resistance is poor, and its steel plate ( Belt) has a service life of about five years
2. Due to the lack of silicon (Si) in the plating material, the bonding force between the plating material and the basic material (steel) is relatively low, and the coating after plating is prone to fatigue, resulting in peeling and cracking of the coating
4. Due to the lack of rare earth (Re) and silicon (Si) in the plating material, the machinability of the coating is poor, and it is easy to cause coating damage during deformation processing
5. In the absence of rare earth (Re), the plating performance is average in refinement, uniformity, and smoothness

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Formula: aluminum Al50%, zinc Zn47%, silicon SI2.8%, rare earth Re0.2%. When feeding, first add aluminum Al, then heat up to 800°C, add silicon Si, and stir evenly, then heat up to 850°C, add rare earth Re, stir evenly, then heat up to 880°C, add zinc Zn, stir well Set aside for 35 minutes, then refining, degassing, heat preservation at 780°C, and casting into ingots. The method of re-refining and degassing is the same as above.

Embodiment 2

[0014] Formula: aluminum Al60%, zinc Zn38%, silicon Si1.9%, rare earth Re0.1%. When feeding, first add aluminum Al, then heat up to 800°C, add silicon Si, and stir evenly, then heat up to 850°C, add rare earth Re, stir evenly, then heat up to 860°C, add zinc Zn, stir well Set aside for 30 minutes, then refining, degassing, heat preservation at 760°C, and casting into ingots. The method of re-refining and degassing is the same as above.

Embodiment 3

[0016] Formula: aluminum Al55.4%, zinc Zn44%, silicon Si0.5%, rare earth Re0.1%. When feeding, first add aluminum Al, then heat up to 800°C, add silicon Si, and stir evenly, then raise the temperature to 850°C, add rare earth Re, stir evenly, then heat up to 860°C-880°C, then add zinc Zn, After stirring evenly, place it for 30-35 minutes, then refine, degas, keep warm at 760°C-780°C, and cast into ingots. The method of re-refining and degassing is the same as above.

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PUM

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Abstract

The invention discloses a coating material and producing method of galvanized steel sheet, which comprises the following elements: Al 50%-60%, Zn 38%-47%, SiO 5%-3%, RE 0. 05%-0. 3%, wherein the producing method comprises the following steps: adding 50%-60%Al in founding furnace; heating-up to 795-805deg. c; adding in 0. 5-3 percent Si; mixing equably; heating-up to 845-855deg. c and joining 0. 05-0. 3% RE; stirring equably; heating-up to 860-880deg. c and adding in 38-47 percent Zn; mixing evenly and placing for 35min. The invention improves corrosion resistance and fire resistant property of coated rolled steel.

Description

technical field [0001] The invention relates to a metal material, in particular to a coating material for special galvanized steel sheets. Background technique [0002] In the prior art, the galvanized sheet used is mainly a hot-dip galvanized steel sheet or a hot-dip galvanized steel strip. The coating material of this product is usually 100% metal zinc Zn, and the metal zinc Zn is plated as the coating material on the The role of the steel surface is: 1. Improve the corrosion resistance of the steel and prolong the service life of the steel. 2. Improve the high temperature resistance (300°C) and corrosion performance of steel to expand the application range of steel plates (strips). 3. The coating composed of plating materials is not damaged under the conditions of stretching and deformation processing, so as to improve the mechanical processing performance of the steel plate (strip). 4. The coating composed of plating materials has a strong bonding force with the basic ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/10C22C1/03C23C30/00
Inventor 冯立新严锦山
Owner JIANGSU LINLONG NEW MATERIALS CO LTD
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