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High-corrosion-resistance hot galvanizing aluminum-magnesium-nickel rare earth alloy coated steel plate and production method thereof

A technology of alloy coating and production method, which is applied in the direction of hot-dip coating process, metal material coating process, coating, etc., can solve problems such as the advent of market-oriented products, and achieve improved coating adhesion, improved oxidation resistance, and improved corrosion resistance. Effect of blackening properties and corrosion resistance

Inactive Publication Date: 2016-12-14
GANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, people are groping, and there is no market-oriented product in large quantities

Method used

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  • High-corrosion-resistance hot galvanizing aluminum-magnesium-nickel rare earth alloy coated steel plate and production method thereof
  • High-corrosion-resistance hot galvanizing aluminum-magnesium-nickel rare earth alloy coated steel plate and production method thereof

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Embodiment Construction

[0013] The following technical scheme is adopted: the coating composition is (5~25%Al)-(1~5%Mg)-(0.1~0.3%Si)-(0.01~0.1%Ni)-(0.01~0.1Ce)-Zn high Corrosion-resistant hot-dip galvanized aluminum-magnesium-nickel rare earth alloy coated steel plate, the base plate is made of low carbon steel.

[0014] The process route is: cold-rolled raw material plate→electrolytic degreasing→annealing in vertical annealing furnace heated by full radiant tube→induction heating zinc pot coating→pure nitrogen air knife→cooling after plating→passivation→drying →Electrostatic oiling →Inspection and packing into storage.

[0015] The annealing stage: set the heating rate to 10±5°C / s, the annealing temperature to 700±50°C, the holding time to 50±15s, and the control atmosphere in the annealing stage to be 5%H 2 -95%N 2 , the dew point is -30±5℃.

[0016] The hot-dip plating process: set the temperature of the zinc pot at 480±25°C, the temperature of the zinc pot at 500±25°C, the dipping time of 5±2s...

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Abstract

The invention relates to a high-corrosion-resistance hot galvanizing aluminum-magnesium-nickel rare earth alloy coated steel plate and a production technology of the steel plate. According to the steel plate, a base plate is made of low-carbon steel, alloy components of a coating include 5-25% of Al, 1-5% of Mg, 0.1-0.3% of Si, 0.01-0.1% of Ni, 0.01-0.1 of Ce and Zn. The production technology includes the steps of conducting cold rolling on a raw material plate, conducting electrolysis and degreasing, heating a vertical annealing furnace through full-radiation tubes for annealing, conducting plating on an inductive heating type zinc pot, using a pure nitrogen air knife, conducting cooling after plating, conducting finishing and tension leveling, conducting passivation, conducting drying, conducting electrostatic oiling, and conducting inspection, packaging and storage. Magnesium nickel enrichment is formed on the surface of the coating, surface oxidation resistance of the coating of the steel plate is effectively improved, and accordingly blackening resistance and corrosion resistance of the coating of the steel plate are improved. A trace amount of rare earth elements are added in the coating to be matched with a proper amount of Al and Zn, the structure of the coating is refined, and adhesiveness, welding performance and machinability of the coating are improved.

Description

technical field [0001] The invention belongs to the production technology of metal plates, and relates to a low-carbon steel plate with a high-corrosion-resistant hot-dip galvanized aluminum-magnesium-nickel rare earth alloy plated steel plate and its production technology. Background technique [0002] Hot-dip galvanized steel sheet has good corrosion resistance, formability, weldability and paintability, and hot-dip galvanized steel sheet is widely used in the fields of construction, home appliances and automobile manufacturing. The corrosion resistance of galvanized steel sheet is directly proportional to the coating thickness, and improving the corrosion resistance of galvanized steel sheet will consume more zinc resources. The limitation of zinc resources prompts people to want the same corrosion resistance effect or better than that of thicker coatings even if the thickness of the coating is not very high. At present, people are groping, and there is no large-scale ma...

Claims

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Application Information

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IPC IPC(8): C23C2/06C23C2/40C22C18/04
Inventor 董世文崔虎陈翠
Owner GANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD
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