High surface quality zinc-aluminum-magnesium steel sheet with excellent blackening resistance and production method

A high-surface, zinc-aluminum-magnesium technology, applied in coating, metal material coating process, hot-dip plating process, etc., can solve the problems of blackening resistance, corrosion resistance and high surface quality, high cost, Adding more trace alloy elements, etc., to achieve excellent surface quality and processing performance, excellent blackening resistance and corrosion resistance, and the effect of coating grain size refinement

Active Publication Date: 2022-08-02
MAANSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Mainly: the content range of Al and Mg is wide, the corresponding production process parameters and product performance change greatly; more trace alloy elements are added, the cost is higher, and the control is more complicated
Blackening resistance, corrosion resistance and high surface quality cannot be combined

Method used

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  • High surface quality zinc-aluminum-magnesium steel sheet with excellent blackening resistance and production method
  • High surface quality zinc-aluminum-magnesium steel sheet with excellent blackening resistance and production method
  • High surface quality zinc-aluminum-magnesium steel sheet with excellent blackening resistance and production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A method for producing a high-surface-quality zinc-aluminum-magnesium steel plate with excellent blackening resistance.

[0038] In the hot dip plating, the plating solution used contains the following chemical components by mass percentage: Al content 1.72%, Mg content 1.49%, Si content 0.05%, Cu content 0.013%, Ti content 0.008%, and the balance is Zn and inevitable impurities.

[0039]The produced high surface quality zinc-aluminum-magnesium steel sheet with excellent blackening resistance includes a substrate and a coating, and the coating contains the following chemical components by mass percentage: Al content 1.72%, Mg content 1.49%, Si content 0.05%, The Cu content is 0.013%, the Ti content is 0.008%, and the balance is Zn and inevitable impurities. The substrate is IF steel, and contains the following chemical components by mass percentage: C: 0.0011%, Si: 0.0031%, Mn: 0.1021%, P: 0.0111%, S: 0.0064%, Als: 0.042%, Ti: 0.06 %, Nb: 0.001%, N: 0.001%, the balanc...

Embodiment 2

[0050] A method for producing a high-surface-quality zinc-aluminum-magnesium steel plate with excellent blackening resistance.

[0051] For the hot dip plating, the plating solution used contains the following chemical components by mass percentage: Al content 2.50%, Mg content 1.56%, Si content 0.90%, Cu content 0.050%, Ti content 0.035%, and the balance is Zn and inevitable impurities.

[0052] The produced high surface quality zinc-aluminum-magnesium steel sheet with excellent blackening resistance includes a substrate and a coating, and the coating contains the following chemical components by mass percentage: Al content 2.50%, Mg content 1.56%, Si content 0.90%, The Cu content is 0.050%, the Ti content is 0.035%, and the balance is Zn and inevitable impurities. The substrate is IF steel and contains the following chemical components by mass percentage: C: 0.0014%, Si: 0.0021%, Mn: 0.1221%, P: 0.0141%, S: 0.0074%, Als: 0.044%, Ti: 0.05 %, Nb: 0.01%, N: 0.0014%, the balan...

Embodiment 3

[0059] A method for producing a high-surface-quality zinc-aluminum-magnesium steel plate with excellent blackening resistance.

[0060] In the hot dip plating, the plating solution used contains the following chemical components by mass percentage: Al content 1.70%, Mg content 1.64%, Si content 0.10%, Cu content 0.005%, Ti content 0.010%, and the balance is Zn and inevitable impurities.

[0061] The produced high surface quality zinc-aluminum-magnesium steel sheet with excellent blackening resistance includes a substrate and a coating layer, and the coating layer contains the following chemical components by mass percentage: Al content 1.70%, Mg content 1.64%, Si content 0.10%, The Cu content is 0.005%, the Ti content is 0.010%, and the balance is Zn and inevitable impurities. The substrate is IF steel and contains the following chemical components by mass percentage: C: 0.0010%, Si: 0.0020%, Mn: 0.1211%, P: 0.0121%, S: 0.0054%, Als: 0.034%, Ti: 0.055 %, Nb: 0.005%, N: 0.002...

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Abstract

The invention provides a high surface quality zinc-aluminum-magnesium steel sheet with excellent blackening resistance and a production method, and the composition of the plating solution: Al1.0-3.0%, Mg1.0-3.0%, Cu0.005-0.055%, Ti0. 005‑0.035%, Si 0.05%‑1.0%, and the balance is Zn and inevitable impurities. The temperature of the plating solution is 410°C-460°C, and the temperature of the strip steel into the pot is 400°C-480°C. The cooling rate after plating is 10-30℃ / s, and the plate temperature is cooled to not higher than 200℃; the plate temperature before entering the quenching water tank is not higher than 80℃, and the plate temperature is not higher than 40℃ before entering the quenching water tank. Compared with the prior art, the present invention adds Si, Ti and Cu to the plating solution, and cooperates with processes such as immersion plating, post-plating cooling, and smoothing. Blackening performance and corrosion resistance, as well as excellent surface quality and processability.

Description

technical field [0001] The invention belongs to the field of metal materials, and relates to the field of hot dip plating of steel plates, in particular to a high surface quality zinc-aluminum-magnesium steel plate with excellent blackening resistance and a production method. Background technique [0002] With the continuous improvement of energy saving, environmental protection and safety requirements for key components such as automobiles, home appliances and structural parts, it is necessary to ensure that the steel materials are not severely corroded during the service period, and the traditional galvanized steel surface treatment can no longer meet the requirements. Corrosion resistance requirements. [0003] Adding appropriate amount of metal magnesium and aluminum to the pure zinc coating can improve the corrosion resistance of the coating, greatly prolong the service life of the coating, and reduce the consumption of zinc by reducing the weight of the coating, which ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C2/06C23C2/28C23C2/40C22C18/04C22C38/00C22C38/02C22C38/04C22C38/06C22C38/12C22C38/14
CPCC23C2/06C23C2/40C23C2/28C22C18/04C22C38/02C22C38/04C22C38/06C22C38/12C22C38/14C22C38/001
Inventor 王滕柴立涛杨平杨兴亮孙镕强刘劼李伟刚李超张百勇王占业孙霖陈泓业谢义康左岳何峰
Owner MAANSHAN IRON & STEEL CO LTD
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