Zinc-aluminum-magnesium steel plate and preparation method capable of effectively controlling black spots on surface of hot dipped zinc-aluminum-magnesium steel plate by CSP process

A zinc-aluminum-magnesium and steel plate technology is applied in the field of effectively controlling the black spots on the surface of hot-dip galvanized aluminum-magnesium steel plates by CSP process, and can solve the problem that the zinc-aluminum-magnesium steel plate cannot be guaranteed to have no black spots and cannot be well improved. Corrosion-resistant coating and substrate adhesion, can not reduce the formation of black spots of zinc-aluminum-magnesium steel plates, etc., to achieve good surface quality, good corrosion resistance and adhesion, and ensure the effect of corrosion resistance

Active Publication Date: 2020-02-07
GANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Although the above-mentioned patents have improved zinc-aluminum-magnesium steel sheets, they cannot reduce the formation of black spots on the zinc-aluminum-magnesium steel sheets or cannot ensure that no black spots are formed on the zinc-aluminum-magnesium steel sheets, and thus cannot improve the corrosion resistance of the zinc-aluminum-magnesium steel sheets. property, bonding force between coating and substrate, etc.

Method used

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  • Zinc-aluminum-magnesium steel plate and preparation method capable of effectively controlling black spots on surface of hot dipped zinc-aluminum-magnesium steel plate by CSP process
  • Zinc-aluminum-magnesium steel plate and preparation method capable of effectively controlling black spots on surface of hot dipped zinc-aluminum-magnesium steel plate by CSP process
  • Zinc-aluminum-magnesium steel plate and preparation method capable of effectively controlling black spots on surface of hot dipped zinc-aluminum-magnesium steel plate by CSP process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0134]This embodiment provides a zinc-aluminum-magnesium steel sheet, which includes a substrate and a coating layer disposed on the substrate, the chemical composition of the substrate is as follows: C: 0.057Wt%, Si: 0.015Wt%, Mn: 0.685Wt%, P: 0.015Wt%, S: 0.006Wt%, O: 0.0030Wt%, Als: 0.0352Wt%, Ca: 0.0032Wt%, and the rest are iron and unavoidable trace elements.

[0135] The chemical composition of the coating is as follows: Al: 10.53%, Mg: 2.67%, Si: 0.21%, Ni: 0.03%, Ce: 0.05%, and the rest is Zn and unavoidable impurities.

[0136] And Al / MgZn is formed in the coating 2 , Zn / MgZn 2 , Al / Zn / MgZn 2 and Al / Zn / Mg 2 Zn 11 , Mg at any part of the zinc-aluminum-magnesium steel plate 2 Zn 11 The mass content is less than 0.5%, and the MgZn in any part of the zinc-aluminum-magnesium steel plate 2 The mass content is greater than 17%.

[0137] This embodiment also provides a method for preparing the zinc-aluminum-magnesium steel sheet, which includes the following steps:

...

Embodiment 2

[0155] This embodiment provides a zinc-aluminum-magnesium steel sheet, which includes a substrate and a coating layer disposed on the substrate, the chemical composition of the substrate is as follows: C: 0.054Wt%, Si: 0.016Wt%, Mn: 0.675Wt%, P: 0.011Wt%, S: 0.005Wt%, O: 0.0028Wt%, Nb: 0.0246Wt%, Als: 0.0385Wt%, Ca: 0.0045Wt%, and the rest are iron and unavoidable trace elements.

[0156] The chemical composition of the coating is as follows: Al: 12.5%, Mg: 3.3%, Si: 0.3%, Ni: 0.05%, Ce: 0.06%, and the rest is Zn and unavoidable impurities.

[0157] And Al / MgZn is formed in the coating 2 , Zn / MgZn 2 , Al / Zn / MgZn 2 and Al / Zn / Mg 2 Zn 11 , Mg at any part of the zinc-aluminum-magnesium steel plate 2 Zn 11 The mass content is less than 0.5%, and the MgZn in any part of the zinc-aluminum-magnesium steel plate 2 The mass content is greater than 20%.

[0158] This embodiment also provides a method for preparing the above-mentioned zinc-aluminum-magnesium steel plate, which is ...

Embodiment 3

[0172] This embodiment provides a zinc-aluminum-magnesium steel sheet, which includes a substrate and a coating layer disposed on the substrate, the chemical composition of the substrate is as follows: C: 0.06Wt%, Si: 0.014Wt%, Mn: 0.701Wt%, P: 0.008Wt%, S: 0.003Wt%, O: 0.0029Wt%, Nb: 0.024Wt%, Als: 0.0432Wt%, Ca: 0.0045Wt%, and the rest are iron and unavoidable trace elements.

[0173] The chemical composition of the coating is as follows: Al: 9.5%, Mg: 1.5%, Si: 0.1%, Ni: 0.1%, Ce: 0.02%, and the rest is Zn and unavoidable impurities.

[0174] And Al / MgZn is formed in the coating 2 , Zn / MgZn 2 , Al / Zn / MgZn 2 and Al / Zn / Mg 2 Zn 11 , Mg at any part of the zinc-aluminum-magnesium steel plate 2 Zn 11 The mass content is less than 0.5%, and the MgZn in any part of the zinc-aluminum-magnesium steel plate 2 The mass content is greater than 15%.

[0175] This embodiment also provides a method for preparing the above-mentioned zinc-aluminum-magnesium steel plate, which is basi...

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Abstract

The invention relates to the technical field of metallurgical corrosion prevention, in particular to a zinc-aluminum-magnesium steel plate and a preparation method capable of effectively controlling black spots on the surface of a hot dipped zinc-aluminum-magnesium steel plate by a CSP process. The zinc-aluminum-magnesium steel plate comprises a substrate and a plating layer arranged on the substrate; the substrate comprises the following chemical components of, by mass percent, 0.045-0.070% of C, 0.020-0.050% of Als, 0.0020-0.0050% of Ca, and the balance Fe and inevitable impurities; the plating layer comprises the following chemical components of, by mass percent, 9-13% of Al, 1-4% of Mg, 0.01-0.3% of Si, 0.01-0.1% of Ni, the balance Zn and inevitable impurities. By controlling the chemical components of the plating layer and the substrate as well as the dosage of each chemical composition, the formed zinc-aluminum-magnesium steel plate is ensured to have good surface quality and noblack spot defects on the surface, so that the zinc-aluminum-magnesium steel plate has good corrosion resistance, binding force and the like.

Description

technical field [0001] The invention relates to the technical field of metallurgical anticorrosion, in particular to a zinc-aluminum-magnesium steel sheet and a preparation method for effectively controlling the black spots on the surface of a hot-dip galvanized aluminum-magnesium steel sheet by a CSP process. Background technique [0002] With the development of the iron and steel industry, construction, highways, household appliances, automobile machinery manufacturing and other industries have also developed rapidly. Due to the different use environments, the corrosion resistance of steel components is very challenging. Surface-coated galvanized, aluminum-zinc and zinc-iron alloys and other products are due to their good corrosion resistance, formability, weldability and coating. It is widely used because of its high performance. With the continuous improvement of the use requirements, the corrosion resistance of the existing galvanized products can no longer meet the req...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C2/06C23C2/02C23C2/40C22C33/04C22C18/04C22C38/02C22C38/04C22C38/06C22C38/12C22C38/14C21D1/26C21D6/00C21D8/02C21D9/00B21B1/22B21B1/26
CPCC23C2/06C23C2/02C23C2/40C22C33/04C22C18/04C22C38/02C22C38/04C22C38/06C22C38/002C22C38/12C22C38/14C21D1/26C21D6/005C21D6/008C21D8/0221C21D9/0081B21B1/26B21B1/22B21B2001/221
Inventor 杜昕邹明李积鹏高伟民赵永科董世文王瑾张国堂孙朝勇刘海军
Owner GANSU JIU STEEL GRP HONGXING IRON & STEEL CO LTD
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