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Re modified low-zinc hot-dipped aluminum alloy coating material

A hot-dip plating, aluminum alloy technology, applied in hot-dip plating process, metal material coating process, coating and other directions, can solve the problem of not meeting the needs of steel hot-dip plating, and improve the resistance to stress corrosion cracking and structure. Homogeneous, surface tension-reducing effect

Inactive Publication Date: 2013-06-12
GUIZHOU HUAKE ALUMINUM MATERIAL ENG TECH RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the development of economy and society, the proportion of high-end coated steel products is increasing, but even if all the zinc in the world is used as coating materials, it is far from meeting the needs of steel hot-dip coating

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] (1) Select a group of elements according to the formula, according to the weight percentage: Zn: 20, Sr: 0.03, Mg: 1.5, Cr: 0.1, Cd: 0.05, Si: 0.4, and the rest are Al and unavoidable trace impurities , the modificator Re 2 (CO) 10 It is 0.01% of the total charge; the total amount of alloy prepared is 1000kg, then the weight of each substance required is calculated as: Zn: 200kg, Sr: 0.3 kg, Mg: 15 kg, Cr: 1 kg, Cd: 0.5 kg, Si: 4 kg, Al: 779.2 kg, Re 2 (CO) 10 : 0.1 kg;

[0013] (2) First add aluminum ingots or molten aluminum into the melting furnace, heat it to melt it completely and keep it warm at 700-800°C;

[0014] (3) Add other substances according to the formula, and finally add zinc and stir evenly; take samples and analyze on-site, adjust the addition amount according to the analysis results and formula range; then continue smelting and stirring, and sample and analyze again until the ratio of each element completely conforms to the formula Require.

[0...

Embodiment 2

[0018] (1) Select a group of elements according to the formula, according to the weight percentage: Zn: 22.5, Sr: 0.04, Mg: 1.75, Cr: 0.15, Cd: 0.065, Si: 0.45, the rest are Al and unavoidable trace impurities , the modificator Re 2 (CO) 10 It is 0.005% of the total charge; the total amount of alloy prepared is 1000kg, then the weight of each substance required is calculated as: Zn: 225kg, Sr: 0.4 kg, Mg: 17.5 kg, Cr(CO) 6 : 6.3 kg, Cd: 0.65 kg, Si: 4.5 kg, Al: 750.45 kg, Re 2 (CO) 10 : 0.05 kg;

[0019] All the other steps are the same as in Example 1.

Embodiment 3

[0021] (1) Select a group of elements according to the formula, according to the weight percentage: Zn: 25, Sr: 0.05, Mg: 2.0, Cr: 0.2, Cd: 0.08, Si: 0.5, and the rest are Al and unavoidable trace impurities , the modificator Re 2 (CO) 10 It is 0.001% of the total charge; the total amount of alloy prepared is 1000kg, then the weight of each substance required is calculated as: Zn: 250kg, Sr: 0.5 kg, Mg: 20 kg, Cr(CO) 6 : 8.46 kg, Cd: 0.8 kg, Si: 5 kg, Al: 721.7kg, Re 2 (CO) 10 : 0.01 kg;

[0022] All the other steps are the same as in Example 1.

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PUM

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Abstract

The invention discloses a Re modified low-zinc hot-dipped aluminum alloy coating material. On basis of weight percentage of elements, the alloy comprises 20-25% of Zn, 0.03-0.05% of Sr, 1.5%-2.0% of Mg, 0.1%-0.2% of Cr, 0.05%-0.08% of Cd, 0.4%-0.5% of Si, and the balance being Al and inevitable trace impurities; and a modifier Re2 (CO)10 accounts for 0.001%-0.01% of the total amount of furnace charging materials. In the coating material provided by the invention, the amount of Al that substitutes Zn is greatly improved, thereby reducing dependence on Zn resources.

Description

technical field [0001] The invention belongs to the field of aluminum alloy coating materials, in particular to a Re-modified low-zinc hot-dip aluminum alloy coating material. Background technique [0002] Since the annual consumption of zinc for hot-dip galvanizing in the world reaches more than 70% of the total output of zinc metal, the shortage of zinc resources is becoming more and more severe. Since 2008, the world's zinc production has maintained an average of about 12 million tons per year, and the consumption of the hot-dip galvanizing industry has reached more than 8.5 million tons, while the coverage of galvanized steel products is less than 1 / 5 of the world's steel production. With the development of economy and society, the proportion of high-end coated steel products is increasing, but even if all the zinc in the world is used as coating materials, it is far from meeting the needs of hot dip coating of steel. This situation is particularly prominent in China. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C2/12C22C21/10
Inventor 张中可车云门三泉
Owner GUIZHOU HUAKE ALUMINUM MATERIAL ENG TECH RES
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