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Slab crystallizer coating and preparation method thereof

A crystallizer and coating technology, which is applied in the field of metal surface treatment, can solve the problems of peeling of the upper coating, the bonding force between the coating material and the crystallizer substrate, etc., to improve the wear resistance and corrosion resistance, and is suitable for large-scale Application, the effect of improving wear resistance

Active Publication Date: 2019-07-16
CISDI ENG CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the coating of the crystallizer is a single coating such as nickel-cobalt, cobalt-nickel, nickel-iron plating, and the requirements for the coating at the entrance and exit of the crystallizer are different, which cannot fully meet the demand. For example, increasing the hardness helps to improve the resistance Abrasion performance increases the life of the lower part, but it is easy to cause the upper coating to peel off, and vice versa
[0004] In order to meet the difference in coating performance requirements between the upper and lower parts of the crystallizer, existing documents disclose that the inlet and outlet parts of the crystallizer use different coatings, but the bonding force between the coating material and the crystallizer substrate has become a problem

Method used

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  • Slab crystallizer coating and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Embodiment 1, a kind of slab crystallizer coating and preparation method thereof

[0040] A slab mold coating such as figure 1 and figure 2 As shown, it includes upper and lower coatings, the upper coating 1 is coated on the inner side of the crystallizer inlet section, the lower coating 2 is coated on the inner side of the crystallizer outlet section, and the boundary point between the upper coating and the lower coating is below the meniscus At 200mm, the upper coating contains nickel coating and nickel-based β nano-alumina composite coating, the thickness of the upper coating from the surface of the crystallizer is 0.5mm, and the lower coating contains nickel-cobalt coating and nickel-cobalt-based silicon carbide nanoparticles Composite coating, the thickness of the lower coating from the crystallizer surface is 2.2mm.

[0041] The preparation method of present embodiment coating is as follows:

[0042] S1: Clean the inlet section of the crystallizer with 10% sod...

Embodiment 2

[0051] Embodiment 2, a slab crystallizer coating and its preparation method

[0052] A slab mold coating such as figure 1 and figure 2 As shown, it includes upper and lower coatings, the upper coating 1 is coated on the inner side of the crystallizer inlet section, the lower coating 2 is coated on the inner side of the crystallizer outlet section, and the boundary point between the upper coating and the lower coating is below the meniscus At 500mm, the upper coating includes nickel coating and nickel-based nano-diamond composite coating, the thickness of the upper coating from the surface of the crystallizer is 0.5mm, and the lower coating includes nickel-cobalt coating and nickel-cobalt-based α nano-alumina composite coating Layer, the thickness of the lower coating from the crystallizer surface is 2.2mm.

[0053] The preparation method of present embodiment coating is as follows:

[0054] S1: Clean the inlet section of the crystallizer with 10% sodium hydroxide and activ...

Embodiment 3

[0063] Embodiment 3, a slab crystallizer coating and its preparation method

[0064] A slab mold coating such as figure 1 and figure 2 As shown, it includes upper and lower coatings, the upper coating 1 is coated on the inner side of the crystallizer inlet section, the lower coating 2 is coated on the inner side of the crystallizer outlet section, and the boundary point between the upper coating and the lower coating is below the meniscus At 500mm, the upper coating contains nickel coating and nickel-based nano-silicon dioxide composite coating, the thickness of the upper coating from the surface of the crystallizer is 1mm, and the lower coating contains nickel-cobalt coating and nickel-cobalt-based nano-titanium oxide composite coating layer, the thickness of the lower coating from the crystallizer surface is 1.5mm.

[0065] The preparation method of present embodiment coating is as follows:

[0066] S1: Clean the inlet section of the crystallizer with 10% sodium hydroxid...

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Abstract

The invention belongs to the technical field of metal surface treatment, and relates to a slab crystallizer coating. The coating comprises an upper coating and a lower coating; the upper coating is applied on the inner side of an inlet section; the lower coating is applied on the inner side of an outlet section; the interface between the inlet section and the outlet section is 200 to 500 mm belowa meniscus; the upper coating and the lower coating each comprises a metal coating and a metal-based nanoparticle composite coating applied on the metal coating; the upper coating is resistant to thermal shock; the lower coating is resistant to corrosion and abrasion; the thickness of the upper coating is 0.1 to 1.0 mm; and the thickness of the lower coating is 0.2 to 2.5 mm. The upper portion ofa crystallizer coated with the coating is more resistant to thermal shock, and the lower portion is more resistant to corrosion and abrasion, and thus the service life of the crystallizer is prolonged.

Description

technical field [0001] The invention belongs to the technical field of metal surface treatment, and in particular relates to a slab crystallizer coating and a preparation method thereof. Background technique [0002] The mold is the heart of the continuous casting machine. The high-temperature liquid steel is cooled to a solid state through the mold. During production, it must not only bear the high temperature of the molten steel and the temperature gradient formed by the circulation of the cooling water, but also bear the friction and wear caused by the movement of the molten steel. And the copper alloy substrate is difficult to meet the service life requirements. At present, the form of coating protection is generally used to enhance the service life. However, the coating is prone to failure, and the purpose of protection cannot be achieved after failure. At present, the main failure modes of crystallizer coating are peeling, electrochemical corrosion and abrasion. Amon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/12C25D3/56C25D5/34C25D7/04C25D15/00
CPCC25D3/12C25D3/56C25D5/34C25D7/04C25D15/00
Inventor 漆锐冯科王水根余晨韵
Owner CISDI ENG CO LTD