Zinc-aluminum-titanium-rare earth alloy for hot dip galvanized steel sheets and preparation method thereof

A technology of rare earth alloys and rare earth master alloys, applied in hot-dip plating process, metal material coating process, coating, etc., can solve the problems of decreased coating adhesion and missing plating of steel plates, so as to improve wettability and corrosion resistance Performance, the effect of improving missing plating phenomenon

Active Publication Date: 2012-12-05
张家港市凤凰科技开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the atomic radius of rare earth is much larger than that of zinc, according to the solid solution theory of similar atomic radius, the solid solubility of rare earth in the plating solution is very small. Decreased adhesion, easy to cause missing plating on the steel plate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A zinc-aluminum-titanium-rare earth alloy used for hot-dip galvanized steel sheets, the composition of which is: 5.5% Al, 0.03% Ti, 0.05% RE, and the balance is zinc.

[0022] A method for preparing a zinc-aluminum-titanium-rare earth alloy for hot-dip coated steel sheets, the steps of which are:

[0023] 1) Preparation of aluminum-rare earth master alloy: batching according to the mass percentage of 95%Al and 5%RE. First heat and melt the aluminum and raise the temperature to 720°C, add rare earth metals under argon protective gas, keep warm at 800°C until the rare earth metals are completely melted, stir evenly, cool down, and cast aluminum-rare earth master alloy small ingots.

[0024] 2) Preparation of aluminum-titanium master alloy: According to the mass percentage of 95%Al and 5%Ti, heat and melt the aluminum and raise the temperature to 720°C, add titanium metal, then raise the temperature to 1500°C and keep it warm until the titanium metal is completely melted, ...

Embodiment 2

[0027] A zinc-aluminum-titanium-rare earth alloy for hot-dip galvanized steel sheets, the composition of which is: 6% Al, 0.03% Ti, 0.08% RE, and the balance is zinc. The balance is zinc.

[0028] A method for preparing a zinc-aluminum-titanium-rare earth alloy for hot-dip coated steel sheets, the steps of which are: aluminum-rare earth intermediate

[0029] 1) Preparation of the alloy: According to the mass percentage of 92%Al and 8%RE, the aluminum is heated and melted and the temperature is raised to 750°C. Under the helium protective gas, rare earth metals are added, the temperature is raised to 820°C, and Keeping warm under the condition of temperature until all the rare earth metals are melted, stirring evenly, cooling, and pouring aluminum-rare earth master alloy small ingots.

[0030] 2) Preparation of aluminum-titanium master alloy: According to the mass percentage of 95%Al and 5%Ti, heat and melt the aluminum and raise the temperature to 730°C, add titanium metal, the...

Embodiment 3

[0033] A zinc-aluminum-titanium-rare earth alloy for hot-dip galvanized steel sheets, the composition of which is: 6% Al, 0.04% Ti, 0.10% RE, and the balance is zinc.

[0034] A method for preparing a zinc-aluminum-titanium-rare earth alloy for hot-dip coated steel sheets, the steps of which are:

[0035] 1) Preparation of aluminum-rare earth master alloy: According to the mass percentage of 93%Al and 7%RE, the aluminum is first heated and melted and the temperature is raised to 740°C. Under the nitrogen protection gas, the rare earth metal is added, and the temperature is raised to 810°C, and Keeping heat at 810°C until the rare earth metals are completely melted, stirring evenly, cooling, and pouring aluminum-rare earth master alloy ingots.

[0036] 2) Preparation of aluminum-titanium master alloy: According to the mass percentage of 94%Al and 6%Ti, heat and melt the aluminum and raise the temperature to 750°C, add titanium metal, then raise the temperature to 1520°C and kee...

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Abstract

The invention discloses a zinc-aluminum-titanium-rare earth alloy for hot dip galvanized steel sheets and a preparation method thereof, and belongs to the technical field of surface treatment of iron and steel materials. The hot dip galvanized alloy material comprises the following components in percentage by mass: 5.5 to 6.5 percent of aluminum (Al), 0.03 to 0.05 percent of titanium (Ti), 0.05 to 0.15 percent of rare earth (RE) metal, and the balance of zinc (Zn). The method for preparing the hot dip galvanized alloy material comprises the following steps of: heating and melting the aluminum, and adding the rare earth metal and titanium metal to prepare an aluminum-rare earth intermediate alloy with a certain mass ratio and an aluminum-titanium intermediate alloy with a certain mass ratio respectively; and heating and melting the zinc, adding the aluminum and the intermediate alloy materials according to the given proportion, and completely melting and stirring uniformly to obtain the required zinc-aluminum-titanium-rare earth alloy. The hot dip galvanized alloy material guarantees the surface finishment of hot dip galvanized layers and remarkably improves salt spray corrosion resistance of steel sheets; meanwhile, the preparation method has low process requirements, is easy to operate, and can meet the requirements of industrialized production.

Description

technical field [0001] The invention relates to a zinc-aluminum-titanium-rare earth alloy used for hot-dip galvanized steel sheets and a preparation method thereof, belonging to the technical field of surface treatment of iron and steel materials. Background technique [0002] Iron and steel materials are currently the most widely used metal materials, but the annual loss due to corrosion is about 700 billion US dollars, accounting for 2-4% of the gross national product of various countries. As one of the surface protection processes of steel materials, hot-dip galvanizing has been widely used in transportation, construction, communication, electric power and other fields. Because the production process of hot-dip galvanizing is simple, the coating has excellent corrosion resistance, and the thickness, toughness, and surface state can be controlled. Therefore, it is widely used in steel protection and has good economic benefits and development prospects. However, with the d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C2/06C22C18/04C22C1/03
Inventor 刘子利徐文龙王怀涛徐斌张全成刘希琴周桂斌
Owner 张家港市凤凰科技开发有限公司
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