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Hot dipping alloy plating added with La element and preparation method thereof

A hot-dip plating and alloying technology, applied in hot-dip plating process, metal material coating process, coating, etc., to achieve the effect of improving corrosion resistance and high temperature oxidation resistance, improving surface quality, and regular size

Inactive Publication Date: 2009-10-21
HULUDAO ZINC IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method solves the technical problem of alloy performance by adding La element in the alloy and heating alloying

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Alloy composition: according to the mass percentage of alloy components: Al 55%, Zn 43.32%, Si 1.6%, and trace element La 0.08%, forming an alloy.

[0012] Preparation method: Add raw aluminum ingots to a heating furnace to heat and melt. When the temperature of the molten aluminum reaches 800-850°C, weigh the molten aluminum through a chute and add it to a melting device with a stirrer. Add 55% Al by mass , then add 1.6% Si, add trace elements 0.08% La and 43.32% Zn, raise the temperature and stir at the same time, and carry out the alloying process. The time is about 30-60 minutes, and the temperature of the alloy liquid is raised to 850-900°C. Add the refining agent cryolite refining and the degassing agent hexachloroethane degassing purification, stir for 20-30 minutes, after standing still, the alloy is released from the furnace and cast into an ingot to become a hot-dip alloy.

Embodiment 2

[0014] Alloy composition: according to the mass percentage of alloy components: Al 57.5%, Si 1.5%, trace elements La 0.18% and Zn 40.82%, forming an alloy.

[0015] Preparation method: heating and alloying alloy elements to obtain hot-dip alloy.

Embodiment 3

[0017] Alloy composition: according to the mass percentage of alloy components: Al 53%, Si 1.7%, trace elements La 0.12% and Zn 45.18%, forming an alloy.

[0018] Preparation method: heating and alloying alloy elements to obtain hot-dip alloy.

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Abstract

The invention relates to a hot dipping alloy plating added with La element and a preparation method thereof. The hot dipping alloy plating comprises the components based on mass percent: 52-58% of Al, 39.8-46.75% of Zn, 1.2-2.0% of Si and 0.05-0.20% of La. The preparation method comprises: the raw material aluminium pig is heated and melted into aluminium liquid which is then added into a melting device provided with a stirrer, and the 1.2-2.0% of Si, the 0.05-0.20% of La and the rest of Zn are mixed into the aluminium liquid, so that alloy is formed in a stirring state. By adopting the alloy for hot dip plating, the corrosion-resistant property and the high temperature antioxygenic property of an alloy plating layer can be enhanced, the surface quality of galvanized steel material can be improved, the service life of the galvanized steel material is prolonged, the crystal pattern of the plating layer is regular in size, uniform and clear, and the bare board of the alloy plating layer can be directly used without color coating.

Description

technical field [0001] The invention relates to a method for smelting nonferrous metal alloys, in particular to a hot-dip alloy with La element added and a preparation method thereof. Background technique [0002] In the domestic hot-dip coating technology, the coating material of the hot-dip steel strip used is mainly a low-aluminum zinc-aluminum binary alloy (or a small amount of antimony can be added to produce spangles). Although great progress has been made in the corrosion resistance and surface quality of aluminum binary alloy steel strips, this product will start to rust after about 10 years of use. Bethlehem Steel Company of the United States has developed an alloy-coated steel sheet with 55% Al, 43.4% Zn, and 1.6% Si by hot-dip coating. The proportion of aluminum content in the plated alloy is obviously increased. It is a hot-dip aluminum-based alloy. Although it has excellent oxidation resistance of the hot-dip aluminum coating, its coating has the following disa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C2/12C22C21/10C22C1/02C22C1/06
Inventor 郭天立武江贾乙东于扬程永强
Owner HULUDAO ZINC IND CO LTD
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