Galvalized aluminum magnesium steel plate and manufacture method thereof

A manufacturing method and hot-dip galvanizing technology, applied in hot-dip plating process, coating, metal material coating process, etc., can solve problems such as large scum, reduce energy consumption, reduce equipment loss, and good adhesion ability and welding performance

Inactive Publication Date: 2014-09-24
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Another object of the present invention is to provide a method for manufacturing hot-dip galvanized aluminum-magnesium steel sheets, which can solve the problem of a large amount of scum caused by adding magnesium in the hot-dip process, thereby ensuring the surface quality of the steel sheets

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  • Galvalized aluminum magnesium steel plate and manufacture method thereof
  • Galvalized aluminum magnesium steel plate and manufacture method thereof
  • Galvalized aluminum magnesium steel plate and manufacture method thereof

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Embodiment 1-8

[0031] Manufacture the hot-dip galvanized aluminum-magnesium steel sheet of the present invention according to the following steps, the steel sheet includes a substrate and a coating coated on the substrate, and the substrate adopts a common IF steel with a thickness of 0.7mm:

[0032] (1) Manufacture substrate:

[0033] (2) Degrease and clean the surface of the substrate;

[0034] (3) The heating rate is 15°C / s, the continuous annealing temperature is 780°C, and the reducing atmosphere is 10vol%H 2 +N 2 , the dew point is -30℃, and the reduction time is 60s;

[0035] (4) Before immersion plating, keep warm at a temperature 10°C higher than the plating solution for 10s to make the temperature of the substrate uniform. , the immersion plating time is 3-10s, wherein, the composition ratio of each chemical element in the plating solution is shown in Table 1, and the plating solution temperature and immersion plating time are shown in Table 2;

[0036] (5) Control the cooling ...

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Abstract

The invention discloses a galvalized aluminum magnesium steel plate, which comprises a substrate and a coating layer coating on the substrate, the coating layer comprises the following chemical element components: 1.9-3.9wt% of Al, 1.9-3.9wt% of Mg, and the balance of Zn and other inevitable impurities; and the mass percentage of Al to Mg is greater than or equal to 1. The invention also discloses a method for manufacturing the galvalized aluminum magnesium steel plate, which comprises the following steps: 1)manufacturing the substrate; 2)degreasing and cleaning the surface of the substrate; 3)continuously annealing; 4)galvalizing the substrate in a heat galvalizing pool; and 5)galvalizing and cooling. The galvalized aluminum magnesium steel plate has good corrosion resisting performance, clunging performance, weldability and manufacturability, can satisfy the plate usage requirement in automobile industry, building field and household electrical appliance industry, the manufacture method of the galvalized aluminum magnesium steel plate can avoid the scum problem of a plating liquid due to addition of Mg, production cost is reduced, and equipment life is prolonged.

Description

technical field [0001] The invention relates to a steel plate and a manufacturing method thereof, in particular to a coated steel plate and a manufacturing method thereof. Background technique [0002] Steel, known as the food of industry, plays a very important role in the fields of industry, agriculture, production activities, and daily life. However, steel is extremely susceptible to corrosion in the air, which will not only affect the appearance of the steel plate, but also cause the steel plate to fail after a period of time. Hot-dip coating a layer of metal zinc on the surface of the steel plate can greatly reduce the corrosion rate of the steel plate. Pure zinc can play a good role in corrosion protection of steel products through isolation protection and sacrificial protection, but for some products that require high corrosion resistance, such as automobiles, household appliances and other durable consumer goods, such as factory buildings, civil For construction fa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C2/06C23C2/40
Inventor 刘昕李俊
Owner BAOSHAN IRON & STEEL CO LTD
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