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Hot galvanizing aluminum-magnesium alloy steel plate and production method thereof

A technology of aluminum-magnesium alloy and production method, which is applied in hot-dip plating process, metal material coating process, coating and other directions, can solve the problem of backward production technology, affecting the surface quality of steel plate, and corrosion resistance of hot-dip galvanized aluminum-magnesium alloy steel plate. To ensure the surface quality, prevent the zinc slag from adhering to the surface of the steel plate, and achieve the effect of strong corrosion resistance

Pending Publication Date: 2019-10-22
山东冠洲股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to technical barriers, the production technology of domestic hot-dip galvanized aluminum-magnesium alloy steel sheets is relatively backward, and the corrosion resistance of the prepared hot-dip galvanized aluminum-magnesium alloy steel sheets is relatively poor. Zinc slag will adhere to the surface of the steel plate to form slag inclusions, seriously affecting the surface quality of the steel plate

Method used

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  • Hot galvanizing aluminum-magnesium alloy steel plate and production method thereof
  • Hot galvanizing aluminum-magnesium alloy steel plate and production method thereof
  • Hot galvanizing aluminum-magnesium alloy steel plate and production method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036] A hot-dip galvanized aluminum-magnesium alloy steel plate, including a substrate and a coating coated on the substrate, the coating includes the following chemical composition in mass percentages: Al 4.5%; Mg 6%; Ca 0.4%; Sr 0.0005%; RE 0.01 %, the balance is Zn.

[0037] The production method of above-mentioned hot-dip galvanized aluminum-magnesium alloy steel plate comprises the following steps:

[0038] S1. Substrate pretreatment: anneal the substrate, and the protective atmosphere of the annealing treatment is N 2 and H 2 , where H 2 The volume percentage is 5%;

[0039] S2. Immersion plating: heat and melt the zinc ingot in a zinc pot, then add aluminum-zinc alloy ingots, magnesium-zinc alloy ingots, calcium-zinc alloy ingots, strontium-zinc alloy ingots and rare earth, and wait for it to melt to form a plating solution. Input inert gas at the top of the pot to create an anaerobic environment, and heat up; preheat the substrate treated in step S1 before putting...

Embodiment 2

[0051] The difference between the hot-dip galvanized aluminum-magnesium alloy steel plate in this embodiment and embodiment 1 is:

[0052] In this embodiment, the coating layer includes the following chemical composition in mass percentage: Al 5.3%; Mg 4.75%; Ca 0.32%; Sr 0.0011%; RE 0.04%, and the balance is Zn.

[0053] The difference between the production method of above-mentioned hot-dip galvanized aluminum-magnesium alloy steel plate and embodiment 1 is:

[0054] H in step S1 2 The volume percentage is 12%;

[0055] In step S2, the preheating temperature is controlled to be 400° C., and the dipping time is 8 seconds.

[0056] Others are the same as embodiment 1.

Embodiment 3

[0058] The difference between the hot-dip galvanized aluminum-magnesium alloy steel plate in this embodiment and embodiment 1 is:

[0059] In this embodiment, the coating includes a mother layer and a suppression layer connected to each other in the thickness direction, the suppression layer is in contact with the substrate, the Sr content in the suppression layer is lower than the Sr content in the mother layer, and the The suppression layer includes the following chemical composition by mass percentage: Al 6.2%; Mg 3.5%; Ca 0.23%; Sr 0.0018%; RE 0.08%, and the balance is Zn; ; Mg 3.5%; Ca 0.23%; Sr 0.0020%; RE 0.08%, the balance being Zn.

[0060] In this embodiment, the thickness of the suppression layer is 1.0 μm.

[0061] The difference between the production method of above-mentioned hot-dip galvanized aluminum-magnesium alloy steel plate and embodiment 1 is:

[0062] H in step S1 2 The volume percentage is 18%;

[0063] Prepare two zinc pots in step S2, one prepares...

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Abstract

The invention discloses a hot galvanizing aluminum-magnesium alloy steel plate and a production method thereof, and belongs to the technical field of steel plate production. A base plate and a clad layer arranged on the base plate in a plating manner are included. The clad layer comprises following chemical components including, by mass percent, 4.5%-8% of Al, 1%-6% of Mg, 0.05%-0.4% of Ca, 0.0005%-0.003% of Sr, 0.01%-0.15% of RE and the balance Zn and other inevitable impurities. According to the production method of the hot galvanizing aluminum-magnesium alloy steel plate, the base plate isannealed firstly, then, a zinc pot is adopted for dip plating, annealing is conducted, and finally a finished product is manufactured. In the steel plate dip plating step, the novel zinc pot is adopted and can rotate, and an iron slag conveying-out mechanism is arranged in the zinc pot. The provided hot galvanizing aluminum-magnesium alloy steel plate is high in corrosion resisting performance, zinc slag can be effectively prevented from being attached to the steel plate surface in the dip plating process, and the steel plate surface quality is guaranteed.

Description

technical field [0001] The invention relates to the technical field of steel plate production, in particular to a hot-dip galvanized aluminum-magnesium alloy steel plate and a production method thereof. Background technique [0002] According to relevant information, in the 1990s, Japan’s Nisshin Steel and Nippon Steel did a lot of work on the research and development of hot-dip galvanized aluminum-magnesium alloy coated steel sheets, and made significant progress. Commercialized production, successively developed zinc-aluminum-magnesium alloy coated steel sheets with trade names such as ZAM, Super Dyma and Dymazinc. In recent years, major European steel companies, such as: ArcelorMittal, ThyssenKrupp, and Tata Steel have successively developed coated steel plates with product names such as ZMEcoProtect, MagiZinc, and Magnelis, and BlueScope Australia is also 55% On the basis of the aluminum-zinc alloy coating, a new generation of ZINCALUME magnesium-coated steel sheets has...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C2/06C23C2/40C22C18/04C22C1/03
CPCC23C2/06C23C2/40C23C2/003C22C18/04C22C1/03
Inventor 宋章峰郭丽涛郭振胜赵国涛杨海翔
Owner 山东冠洲股份有限公司