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

A production method and high-surface technology, applied in coating, metal material coating process, hot-dip plating process, etc., can solve the problem of incompatibility between blackening resistance, corrosion resistance and high surface quality, high cost, and added To solve the problems of many trace alloy elements, etc., to achieve excellent surface quality and processing performance, excellent blackening resistance and corrosion resistance, and the effect of fine grain size of the coating

Active Publication Date: 2020-08-11
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 plate with excellent blackening resistance and production method
  • High-surface quality zinc-aluminum-magnesium steel plate with excellent blackening resistance and production method
  • High-surface quality zinc-aluminum-magnesium steel plate with excellent blackening resistance and production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A production method of high-surface-quality zinc-aluminum-magnesium steel sheet with excellent blackening resistance. The technological process is: continuous casting of molten steel, hot rolling, pickling, cold rolling, degreasing, hot dipping, cooling, passivation, and skin pass.

[0038] In the hot-dip plating, the plating solution used contains the following chemical components in 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 unavoidable 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 in mass percentages: 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 unavoidable impurities. The substrate is IF steel, containing the followi...

Embodiment 2

[0050] A production method of high-surface-quality zinc-aluminum-magnesium steel sheet with excellent blackening resistance. The technological process is: continuous casting of molten steel, hot rolling, pickling, cold rolling, degreasing, hot dipping, cooling, passivation, and skin pass.

[0051] In the hot-dip plating, the plating solution used contains the following chemical components in 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 unavoidable 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 in mass percentages: 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 unavoidable impurities. The substrate is IF steel, containing the follow...

Embodiment 3

[0059] A production method of high-surface-quality zinc-aluminum-magnesium steel sheet with excellent blackening resistance. The technological process is: continuous casting of molten steel, hot rolling, pickling, cold rolling, degreasing, hot dipping, cooling, passivation, and skin pass.

[0060] In the hot-dip plating, the plating solution used contains the following chemical components in 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 unavoidable impurities.

[0061] 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 in mass percentages: 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 unavoidable impurities. The substrate is IF steel, containing the follow...

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Abstract

The invention provides a high-surface quality zinc-aluminum-magnesium steel plate with excellent blackening resistance and a production method. A plating solution is prepared from the following components: 1.0 to 3.0 percent of Al, 1.0 to 3.0 percent of Mg, 0.005 to 0.055 percent of Cu, 0.005 to 0.035 percent of Ti, 0.05 to 1.0 percent of Si, and the balance of Zn and unavoidable impurities. The temperature of the plating liquid is 410 to 460 DCG C; and the temperature of strip steel into a pot is 400 to 480 DEG C. The cooling speed after plating is 10 to 30 DEG C / s; the plate temperature is cooled to not higher than 200 DEG C; the temperature of a plate before entering a quenching tank is not higher than 80 DEG C; and the plate enters the quenching tank and is cooled to not higher than 40DEG C. Compared with the prior art, Si, Ti and Cu are added into the plating solution; a product has little zinc slag by matching the processes of immersion plating, cooling after plating, finishingand the like; the grain size of a plated layer is refined; and the high-surface quality zinc-aluminum-magnesium steel plate has excellent blackening resistance and corrosion resistance, and meanwhile,has excellent surface quality and processing and forming performance.

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. The traditional galvanized steel plate surface treatment can no longer meet the requirements Corrosion resistance requirements. [0003] Adding an 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, wh...

Claims

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Application Information

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Patent Type & Authority Applications(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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