Hot-dipping aluminum-zinc alloy containing rare earths and preparation method thereof

A hot-dip aluminum and zinc alloy technology, applied in hot-dip galvanizing process, metal material coating process, coating, etc., can solve the problems of poor surface appearance quality, coarse surface spangles, poor processing formability, etc., and achieve wet Good corrosion resistance, refined spangles, and improved corrosion resistance

Inactive Publication Date: 2013-04-17
YUNNAN KEENLY NEW MATERIAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of poor formability, poor corrosion resistance, coarse and uneven surface spangles, and poor surface appearance quality of existing alloy hot-dip plates, the invention provides a rare earth-containing hot-dip aluminum-zinc alloy, and its embodiment as follows:

Method used

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  • Hot-dipping aluminum-zinc alloy containing rare earths and preparation method thereof
  • Hot-dipping aluminum-zinc alloy containing rare earths and preparation method thereof
  • Hot-dipping aluminum-zinc alloy containing rare earths and preparation method thereof

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example 1

[0035] The material composition is:

[0036] 55.0wt% Al, 1.5wt% Si, 0.07wt% La+Ce, the balance being Zn. According to the material composition, industrial pure aluminum, industrial pure zinc, industrial pure silicon, industrial pure rare earth Ce or La or La+Ce (or aluminum rare earth master alloy) are melted in the intermediate frequency furnace (or industrial frequency furnace) and poured into the mold It is made into an alloy ingot for hot-dip plating, which is used in a continuous production line of hot-dip steel strip or a production line of hot-dip steel components. The hot-dip process used is the same as that of the original Galvalume alloy.

example 2

[0038] The material composition is:

[0039] 55.0wt% Al, 1.5wt% Si, 0.12wt% La+Ce, the balance is Zn. According to the material composition, industrial pure aluminum, industrial pure zinc, industrial pure silicon, industrial pure rare earth Ce or La or La+Ce (or aluminum rare earth master alloy) are melted in the intermediate frequency furnace (or industrial frequency furnace) and poured into the mold It is made into an alloy ingot for hot-dip plating, which is used in a continuous production line of hot-dip steel strip or a production line of hot-dip steel components. The hot-dip process used is the same as that of the original Galvalume alloy.

example 3

[0041] The material composition is:

[0042] 55.0wt% Al, 1.5wt% Si, 0.07wt% La+Ce, the balance being Zn. According to the material composition, industrial pure aluminum, industrial pure zinc, industrial pure silicon, industrial pure rare earth Ce or La or La+Ce (or aluminum rare earth master alloy) are directly melted in the zinc pot or pre-melting pot on the hot-dip line , Direct hot-dip production.

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Abstract

The invention discloses a hot-dipping aluminum-zinc alloy containing rare earths and a preparation method thereof, belonging to the technical field of surface hot-dip coating of a steel plate and a steel plate component and solving the problems of poor forming property, poor corrosion resistance and poor surface appearance quality of the existing alloy hot-dipping board. The invention provides a hot-dipping aluminum-zinc alloy containing rare earths. The hot-dipping aluminum-zinc alloy comprises the following components in percentage by weight: 54%-59% of aluminum, 1.2%-1.8% of silicon, 0.05%-0.15% of rear earths, and the balance of zinc and inevitable impurities, wherein the rear earths refer to cerium or lanthanum or a rear earth mixture of cerium and lanthanum. The invention further provides the method for preparing the hot-dipping aluminum-zinc alloy, wherein the method comprises the following steps of: adding cerium or lanthanum or the rear earth mixture of cerium and lanthanum which is 0.07wt% or 0.12% to a Galvalume alloy melt to obtain the hot-dipping aluminum-zinc alloy containing rare earths. According to the hot-dipping aluminum-zinc alloy containing rare earths disclosed by the invention, the corrosion resistance, the formability and the spangles on the surface of the fine coating of the hot-dipping layer are improved; and the liquidity of the melt is improved.

Description

technical field [0001] The invention belongs to the technical field of hot-dip plating on the surface of steel plates and steel structural parts, and relates to a hot-dip aluminum-zinc alloy. Background technique [0002] Hot-dip aluminum-zinc alloy, also known as Galvalume alloy (Al55%-Si1.5%-balance Zn), was invented by Bethlehem Steel Company of the United States in 1970. Now the patent protection has entered the expiration date. It is mainly used for the protection of hot-dip coatings such as steel plates. It combines the excellent corrosion resistance of aluminum and the cathodic corrosion protection of zinc, and its corrosion resistance is 2-6 times that of hot-dip galvanizing. Since the alloy is mainly made of aluminum and has a light specific gravity, the cost is relatively low under the same hot-dip coating thickness. Hot-dip galvanizing is much lower, so it has a higher cost performance. [0003] At present, in China, hot-dip aluminum-zinc alloy (Galvalume alloy) ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C2/12
Inventor 赵云杰周一林徐远志刘春富陈昆蒋英箴朱良
Owner YUNNAN KEENLY NEW MATERIAL
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