A kind of hot-dip aluminum-zinc alloy containing rare earth and magnesium and preparation method thereof

A zinc alloy, hot-dip aluminum technology, applied in hot-dip plating process, metal material coating process, coating and other directions, can solve the problems of poor surface appearance, poor blackening resistance of coating, poor processing formability, etc. Good wetness, improved blackening resistance, and improved corrosion resistance

Active Publication Date: 2015-09-09
YUNNAN KEENLY NEW MATERIAL
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  • 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, poor surface appearance quality, and poor blackening resistance of the coating in the existing alloy hot-dip plate, the invention provides a rare earth and magnesium-containing Hot-dip aluminum-zinc alloy, its embodiment is as follows:

Method used

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  • A kind of hot-dip aluminum-zinc alloy containing rare earth and magnesium and preparation method thereof
  • A kind of hot-dip aluminum-zinc alloy containing rare earth and magnesium and preparation method thereof
  • A kind of hot-dip aluminum-zinc alloy containing rare earth and magnesium and preparation method thereof

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Embodiment 1

[0040] The material composition is:

[0041] 55.0wt% Al, 1.5wt% Si, 0.07wt% La+Ce, the balance being Zn. Melt 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) in an intermediate frequency furnace (or industrial frequency furnace) according to the material composition, and pour it 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.

Embodiment 2

[0043] The material composition is:

[0044]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.

Embodiment 3

[0046] The material composition is:

[0047] 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 provides a hot-dip aluminum and zinc alloy containing rare earth and magnesium and a preparation method thereof, belonging to the technical field of surface hot dipping and solving the problems of poor formability of the existing alloy hot dipping plate and poor blackening property of a coating. The hot-dip aluminum and zinc alloy containing rare earth and magnesium comprises the following components in percent by weight: 54-59 percent of aluminum, 1.2-1.8 percent of silicon, 0.05-0.15 percent of rare earth, 0.3-0.7 percent of magnesium and the balance of zinc and unavoidable impurities, wherein the rare earth is cerium or lanthanum and mixed rare earth of cerium and lanthanum. The invention also provides a preparation method of the hot-dip aluminum and zinc alloy containing rare earth and magnesium. The preparation method comprises the steps of: adding magnesium, cerium or lanthanum and the mixed rare earth of cerium and lanthanum in a Galvalume alloy melt, and pouring the obtained melt into a casting mould to obtain the hot-dip aluminum and zinc alloy containing rare earth and magnesium. According to the hot-dip aluminum and zinc alloy containing rare earth and magnesium, the corrosion resistance, the formability and the blackening resistance of the hot dip layer are improved, and spangles on the surface of the coating are refined.

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. It is mainly used for the protection of hot-dip coatings such as steel plates. It combines the excellent corrosion resistance of aluminum The 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 much lower than that of hot-dip galvanizing under the same hot-dip coating thickness. Therefore, it has a higher cost performance. [0003] At present, in China, hot-dip aluminum-zinc alloy (Galvalume alloy) is mainly used in industries such as electric control cabinet plates, but has not been widely used in automo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C2/12C22C21/10
Inventor 赵云杰徐远志朱良陈昆赵有才
Owner YUNNAN KEENLY NEW MATERIAL
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