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Manufacturing method of wear and scratch resistant nano-coated steel plate and nano-coated steel plate thereof

A nano-coating and manufacturing method technology, which is applied in the field of wear-resistant and scratch-resistant nano-coated steel plates, can solve the problems of nano-particle sintering and growth, and achieve the effect of improving applicability and wear resistance

Inactive Publication Date: 2012-04-04
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] There are two main problems in traditional thermal sprayed nanostructured coatings: ① The delivery of nanoparticles
②Sintering growth of nanoparticles

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Nano-WC Ceramic Particles Modified Hot-dip Galvanized Steel Sheet

[0024] For nano-particles, choose nano-WC ceramic particles with a particle size of 10nm-50nm. After the steel plate comes out of the zinc pot, the powder is transported to the surface of the galvanized sheet at a voltage of 80KV-100KV, combined with molten zinc liquid, and then air-cooled to form Nano WC ceramic particles surface modified hot-dip galvanized sheet, the temperature of the zinc pot is about 470 ℃.

[0025] The surface hardness of the obtained surface-modified steel sheet is more than twice that of the traditional hot-dip galvanized steel sheet, and the grain size of the coating is refined to below the micron level.

Embodiment 2

[0027] Nano-NiAl intermetallic compound particles modified hot-dip galvanized steel sheet

[0028] For nano-particles, choose nano-NiAl intermetallic compound particles with a particle size of 50nm-100nm. After the steel plate comes out of the zinc pot, the powder is transported to the surface of the galvanized sheet at a voltage of 50KV-80KV, combined with molten zinc liquid, and then air-cooled. , forming nano-NiAl intermetallic compound particles surface modified hot-dip galvanized sheet, the temperature of the zinc pot is about 470 ℃.

[0029] The surface hardness of the obtained surface-modified steel sheet is more than twice that of the traditional hot-dip galvanized steel sheet, and the grain size of the coating is refined to below the micron level.

Embodiment 3

[0031] Nano-Al 2 o 3 +SiO2 2 Oxide particles modified hot-dip galvanized aluminum steel sheet

[0032] Nano-particles choose nano-Al with a particle size of 30nm to 90nm 2 o 3 +SiO2 2 Oxide particles, after the steel plate comes out of the zinc pot, the powder is transported to the surface of the galvanized sheet with a voltage of 80KV ~ 100KV, combined with the molten zinc liquid, and then air-cooled to form nano-Al 2 o 3 +SiO2 2 Surface modification of oxide particles for hot-dip galvanized sheet, the composition of the bath is 95% Zn5% Al, and the temperature of the zinc pot is about 500°C.

[0033] The surface hardness of the obtained surface-modified steel sheet is more than twice that of the traditional hot-dip galvanized steel sheet, and the grain size of the coating is refined to below the micron level.

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PUM

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Abstract

The invention discloses a manufacturing method of a wear and scratch resistant nano-coated steel plate. The method is characterized in that: on a continuous hot dipping production line, after strip steel is out of a molten plating solution and is subjected to air knife blowing, a hard nano-particle conveying device conveys hard nano-particles uniformly to a strip steel surface where the nano-particles combine with a molten coating, and after cooling, a surface layer distributed with hard nano-particles can form on the surface of the coating. The hard nano-particle conveying device is an electric field generating device and is arranged after the strip steel on a continuous hot dipping production line comes out of the air knife. The hard nano-particles can be one or several of ceramics, metal-based ceramics, a metal, an intermetallic compound and a metallic oxide. The manufacturing method can produce a steel plate with improved wear and scratch resistance as well as formability compared with existing hot-dipped galvanized steel plates.

Description

technical field [0001] The invention relates to the technical field of continuous steel strip hot-dip plating, in particular to a method for manufacturing a wear-resistant and scratch-resistant nano-coated steel plate and the wear-resistant and scratch-resistant nano-coated steel plate. Background technique [0002] About 10% of the steel in the world is lost due to corrosion, and galvanizing is an effective measure to reduce the corrosion loss of steel. However, due to the lack of corrosion resistance, wear resistance, scratch resistance and welding performance, traditional pure galvanized steel sheets have been increasingly replaced by new coatings. [0003] In order to improve its corrosion resistance, new coatings such as zinc-aluminum and zinc-aluminum-magnesium with better corrosion resistance have been developed, and all of them have been commercialized. Alloying the coating improves the hardness and corrosion resistance of the coating, as well as improves its weldin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C28/00C23C2/02
Inventor 吕家舜李锋杨洪刚康永林
Owner ANGANG STEEL CO LTD