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Ti and Bi-containing zinc-aluminum-magnesium alloy coating steel and preparation method thereof

An alloy coating, zinc-aluminum-magnesium technology, applied in the direction of metal material coating process, coating, manufacturing tools, etc., can solve the problems such as the decline of formability and welding performance, and achieve the effect of excellent adhesion and good promotion and application prospects.

Pending Publication Date: 2022-03-01
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] It can be seen that the zinc-aluminum-magnesium steel sheet with high corrosion resistance is mainly the zinc-aluminum-magnesium steel sheet with a medium-high aluminum composition system. With the increase of Al and Mg content, the corrosion resistance of the coating increases, but at the same time, the formability and weldability of the coating increase. Performance drop
In the fields of home appliances and automobiles, in order to ensure that the Zn-Al-Mg alloy coated steel sheet meets the user's stamping forming requirements, it must have good formability. At present, the Zn-Al-Mg alloy coated steel sheet with a medium and high aluminum composition system cannot meet the user's requirements.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1 Preparation of zinc-aluminum-magnesium alloy coated steel of the present invention

[0026] Coating weight 40g / m 2 (double-sided), the main components of the coating are: aluminum 0.5%, magnesium 0.8%, titanium 0.01%, bismuth 0.05%, lead 0.002%, antimony 0.001%, chromium 0.001%, cadmium 0.001%, tin 0.001%, the rest is zinc ;Steel base is bake-hardened steel.

[0027] The preparation method is: degreasing cleaning, continuous annealing, hot-dip plating, air knife purging, cooling, wherein the degreasing cleaning is rinsed after degreasing treatment, the continuous annealing process controls the hydrogen in the furnace to 3.2% in terms of volume percentage, and the steel plate is filled with zinc The pot temperature is 410°C, the bath temperature is 400°C during the hot-dip plating process, and the temperature is 280°C when the strip steel reaches the top turning roll after rapid cooling.

[0028] testing method:

[0029]Corrosion resistance: neutral salt ...

Embodiment 2

[0033] Embodiment 2 Preparation of zinc-aluminum-magnesium alloy coated steel of the present invention

[0034] Coating weight 180g / m 2 (double-sided), the main components of the coating are: aluminum 2.0%, magnesium 2.0%, titanium 0.20%, bismuth 0.15%, lead 0.001%, antimony 0.002%, chromium 0.001%, cadmium 0.001%, tin 0.001%, and the rest is zinc ; The steel base is Ti-IF steel.

[0035] The preparation method is: degreasing cleaning, continuous annealing, hot-dip plating, air knife purging, cooling, wherein the degreasing cleaning is rinsed after degreasing treatment, the continuous annealing process controls the hydrogen in the furnace to 4.5% in terms of volume percentage, and the steel plate is filled with zinc The pot temperature is 450°C, the bath temperature is 460°C during the hot-dip plating process, and the temperature is 240°C when the strip steel reaches the top turning roll after rapid cooling.

[0036] Test method is the same as embodiment 1. After testing, t...

Embodiment 3

[0037] Embodiment 3 Preparation of zinc-aluminum-magnesium alloy coated steel of the present invention

[0038] Coating weight 350g / m 2 (double-sided), the main components of the coating are: aluminum 3.5%, magnesium 3.0%, titanium 0.30%, bismuth 0.30%, silicon 0.10%, lead 0.001%, antimony 0.002%, chromium 0.001%, cadmium 0.002%, tin 0.002% , the rest is zinc; the steel base is low-carbon aluminum-killed steel.

[0039] The preparation method is: degreasing cleaning, continuous annealing, hot-dip plating, air knife purging, cooling, wherein the degreasing cleaning is rinsed after degreasing treatment, the continuous annealing process controls the hydrogen in the furnace to 6.0% in terms of volume percentage, and the steel plate is filled with zinc The pot temperature is 500°C, the bath temperature is 500°C during the hot-dip plating process, and the temperature is 200°C when the strip steel reaches the top turning roll after rapid cooling.

[0040] Test method is the same as...

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PUM

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Abstract

The invention relates to Zn-Al-Mg alloy coating steel containing Ti and Bi and a preparation method of the Zn-Al-Mg alloy coating steel, and belongs to the technical field of ferrous metallurgy production. The invention provides a Zn-Al-Mg alloy coating steel containing Ti and Bi. The coating comprises the following chemical components in percentage by mass: 1%-5% of aluminum, 0.5%-10% of magnesium, 0.001%-0.5% of titanium, 0.01%-1.0% of bismuth and the balance of zinc and inevitable impurities. Wherein Al / Mg is 0.5-2, and the total amount of titanium and bismuth is less than or equal to 0.6%. The zinc-aluminum-magnesium alloy coated steel provided by the invention can meet the requirements of a user on high corrosion resistance and formability of the steel, is particularly suitable for the fields of household appliances and automobiles, and has good popularization and application prospects.

Description

technical field [0001] The invention relates to zinc-aluminum-magnesium alloy coated steel containing Ti and Bi and a preparation method thereof, belonging to the technical field of iron and steel metallurgy production. Background technique [0002] Zn-Al-Mg alloy coating attracted widespread attention abroad in the 1980s, and became the focus of research in the professional field of hot-dip galvanizing and zinc alloy coating. According to the research results of domestic and foreign counterparts, under the same level of coating Zn and Al content, the hot-dip Zn-Al-Mg alloy coated steel plate with Mg addition has better corrosion resistance, and the processing and application performance of the material ( Formability, weldability and coating performance) are excellent, and can replace the current corresponding hot-dip galvanized or zinc alloy coated steel sheets, and the market demand prospect is very broad. [0003] Hot-dip Zn-Al-Mg alloy-coated steel sheets have been indu...

Claims

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Application Information

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IPC IPC(8): C23C2/06C22C18/00C22C18/04C23C2/02C21D1/26C21D1/74C21D9/52C23C2/20
CPCC23C2/06C22C18/00C22C18/04C23C2/02C21D1/26C21D1/74C21D9/52C23C2/20
Inventor 董学强郭太雄冉长荣徐接旺王亮赟尹晶晶
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP