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A kind of zn-al-ti-b alloy for hot-dipping steel and preparation method thereof

A hot-dip plating and alloying technology, applied in hot-dip plating process, metal material coating process, coating, etc., can solve problems such as affecting product quality, high slag content in molten pool, and excessively thick coating, so as to reduce heat The effect of immersion plating temperature, reducing solubility, and improving corrosion resistance

Active Publication Date: 2016-01-27
江苏中川通大科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Hot-dip galvanized aluminum alloy is a relatively simple and effective anti-corrosion method for steel. Since the zinc-aluminum alloy coating takes into account the durability of aluminum and the sacrificial cathodic protection of zinc, the performance of the coating is superior to that of a single element coating. The anti-corrosion performance is several times higher than that of pure zinc coating, and has been widely used in household appliances, construction, container manufacturing, vehicles and ships, electromechanical and other fields; in order to improve the corrosion resistance and quality of galvanized products, some alloying elements It is often added to the zinc pool, such as aluminum, magnesium, titanium, boron, rare earth, etc.; literature review shows that the research on adding these elements to Galfan coating (containing 5wt.%Al) and Galvalume coating (containing 55wt.%Al) There are many, but there are few studies on controlling the aluminum content of the coating alloy at 30wt.%. At present, the research work of Tu Hao et al. 20~40wt.%, and Si, Mg, and rare earth elements are added, but there is no research report on the addition of alloying elements such as Ti and B in galvanized alloys containing 20~40wt.% aluminum
[0003] At present, in the existing hot-dip galvanized aluminum alloy, Galvalume coating has been widely used due to its excellent corrosion resistance; however, Galvalume alloy coating is too The problem of thick and excessive slag content in the molten pool seriously affects the product quality

Method used

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  • A kind of zn-al-ti-b alloy for hot-dipping steel and preparation method thereof
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  • A kind of zn-al-ti-b alloy for hot-dipping steel and preparation method thereof

Examples

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Effect test

Embodiment 1

[0022] A kind of zinc-aluminum alloy for hot-dip galvanizing of steel materials, by weight percentage, composition is 30%Al, 0.0%B, 1.0%Ti, the balance is Zn, and sample gross weight is 150g, wherein Al-10Ti intermediate alloy 15g, Al block 31.5g, and the rest are Zn lumps.

[0023] The preparation steps of the zinc-aluminum-titanium-boron alloy of this embodiment are as follows:

[0024] (1) Melting: Put the Zn block and Al block weighed according to the proportion into the preheated crucible, raise the temperature to 720°C to generate alloy liquid, add salt covering agent on the surface of the alloy liquid, and then wrap it with aluminum foil The Al-10Ti master alloy is pressed into the alloy liquid, melted, stirred and mixed evenly, cooled to 550°C, kept for one hour, and waited for slag removal;

[0025] (2) Slag removal: After the zinc-aluminum-titanium alloy liquid is completely melted and stirred evenly, the slag in the zinc-aluminum alloy liquid is removed from the mo...

Embodiment 2

[0028] A zinc-aluminum alloy for hot-dip plating, by weight percentage, the composition is 30%Al, 1.0%Ti, 0.5%B, the balance is Zn, the total sample weight is 150g, wherein Al-10Ti master alloy 15g, Al- The 16B master alloy is 4.6875g, the Al block is 27.5625g, and the balance is Zn block.

[0029] The preparation steps of the zinc-aluminum-titanium-boron alloy of this embodiment are as follows:

[0030] (1) Melting: Put the Zn block and Al block weighed according to the proportion into the preheated crucible, raise the temperature to 720°C to generate alloy liquid, add salt covering agent on the surface of the alloy liquid, and then wrap it with aluminum foil The Al-10Ti and Al-16B master alloys are pressed into the alloy liquid, melted, stirred and mixed evenly, cooled to 550°C, kept for one hour, and waited for slag removal;

[0031] (2) Slag removal: After the zinc-aluminum alloy liquid is completely melted and stirred evenly, the slag in the zinc-aluminum alloy liquid is...

Embodiment 3

[0034] A zinc-aluminum alloy for hot-dip plating, by weight percentage, the composition is 30%Al, 1.0%Ti, 1.0%B, and the balance is Zn; the total weight of the sample is 150g, of which Al-10Ti master alloy is 15g, Al- 9.375g of 16B master alloy, 23.625g of Al block, and Zn block as the balance.

[0035] The preparation steps of the zinc-aluminum-titanium-boron alloy of this embodiment are as follows:

[0036](1) Melting: Put the Zn block and Al block weighed according to the proportion into the preheated crucible, raise the temperature to 720°C to generate alloy liquid, add salt covering agent on the surface of the alloy liquid, and then wrap it with aluminum foil The Al-10Ti and Al-16B master alloys are pressed into the alloy liquid, melted, stirred and mixed evenly, cooled to 550°C, kept for one hour, and waited for slag removal;

[0037] (2) Slag removal: After the zinc-aluminum-titanium-boron alloy liquid is completely melted and stirred evenly, the slag in the zinc-alumi...

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Abstract

The patent of the invention belongs to the technical field of hot-dip galvanizing, and particularly refers to a Zn-Al-Ti-B alloy for hot-dip galvanizing of steel and a preparation method thereof. It is characterized in that: the content of Al is controlled at 30wt.%, the content of Ti is controlled at 0.5-2wt.%, the content of B is controlled at 0.5-2wt.%, and the rest is Zn. The invention refines the eutectic structure in the galvanized alloy through titanium and boron elements, improves the corrosion resistance of the galvanized alloy, reduces the amount of zinc slag formed by reducing the aluminum content in the galvanized alloy, and can make the zinc pool The limited zinc slag in the process is converted from bottom slag to scum, thereby reducing production costs and improving production efficiency. It can be used in the hot-dip galvanizing process for parts that require high corrosion resistance and appearance quality.

Description

technical field [0001] The patent of the invention belongs to the technical field of hot-dip galvanizing, and particularly refers to a Zn-Al-Ti-B alloy for hot-dip galvanizing of steel and a preparation method thereof. Background technique [0002] Hot-dip galvanized aluminum alloy is a relatively simple and effective anti-corrosion method for steel. Since the zinc-aluminum alloy coating takes into account the durability of aluminum and the sacrificial cathodic protection of zinc, the performance of the coating is superior to that of a single element coating. The anti-corrosion performance is several times higher than that of pure zinc coating, and has been widely used in household appliances, construction, container manufacturing, vehicles and ships, electromechanical and other fields; in order to improve the corrosion resistance and quality of galvanized products, some alloying elements It is often added to the zinc pool, such as aluminum, magnesium, titanium, boron, rare ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C18/04C22C1/03C23C2/06
Inventor 王建华潘修河涂浩苏旭平刘亚吴长军
Owner 江苏中川通大科技有限公司