On-line preparation method of steel plate strip with anti-damage corrosion-resistant copper-based coating

An anti-damage and corrosion-resistant technology, which is applied in the direction of coating, metal material coating process, heating inorganic powder coating, etc., to achieve good bonding strength, good corrosion resistance, and overcome the effects of pores

Inactive Publication Date: 2021-03-26
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, there have been many preparation technologies for copper-based coatings on the surface of steel strips, but so far, there has been no report of directly using heat treatment + hot rolling processing methods to prepare on-line coatings on the surface of steel strips with dense structures, no pores and cracks, and high strength coatings. Copper-based alloy coating with good comprehensive properties such as mechanical damage resistance and high corrosion resistance

Method used

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  • On-line preparation method of steel plate strip with anti-damage corrosion-resistant copper-based coating
  • On-line preparation method of steel plate strip with anti-damage corrosion-resistant copper-based coating
  • On-line preparation method of steel plate strip with anti-damage corrosion-resistant copper-based coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1 An online preparation method of a damage-resistant and corrosion-resistant copper-based coating for steel strips:

[0035]Steel billet surface cleaning treatment: first use wire brushes, hammers or spatulas to manually derust the surface of the billet, and then use a grinder with a speed of 800 rpm and a No. 23 grinding wheel to electrically remove the surface rust layer.

[0036] Copper powder coating: spray copper powder or brush copper powder to form a certain thickness of copper powder coating on the surface of the billet, and the thickness of the copper powder coating can be controlled within 1mm.

[0037] Billet heating: the steel billet coated with copper-based powder coating was heated in a muffle furnace at a heating temperature of 1150°C for 1 hour.

[0038] Billet rolling: rolling process parameters: rolling speed 1m / s, reduction 20%. figure 2 and image 3 For the present invention, samples are cut along the rolling direction and perpendicular to...

Embodiment 2

[0041] Example 2 An online preparation method of an anti-damage and corrosion-resistant copper-based coating on a steel strip:

[0042] Billet surface cleaning treatment is the same as in Example 1.

[0043] Copper powder coating: spray copper powder or brush copper powder to form a certain thickness of copper powder coating on the surface of the billet, and the thickness of the copper powder coating can be controlled at 5mm.

[0044] Billet heating: the steel billet coated with copper-based powder coating was heated in a muffle furnace at a heating temperature of 1150°C for 1 hour.

[0045] Billet rolling: rolling process parameters: rolling speed 1m / s, reduction 40%. figure 2 and image 3 For the present invention, samples are cut along the rolling direction and perpendicular to the rolling direction (as shown by number 4 in the figure). The copper coating on the steel substrate surface was analyzed by scanning electron microscopy. The prepared copper coating is dense a...

Embodiment 3

[0048] Example 3 An online preparation method of an anti-damage and corrosion-resistant copper-based coating on a steel strip:

[0049] Billet surface cleaning treatment is the same as in Example 1.

[0050] Copper powder coating: spray copper powder or brush copper powder to form a certain thickness of copper powder coating on the surface of the billet, and the thickness of the copper powder coating can be controlled at 5mm, such as figure 1 shown.

[0051] Billet heating: the steel billet coated with copper-based powder coating was heated in a muffle furnace at a heating temperature of 1150°C for 1 hour.

[0052] Billet rolling: rolling process parameters: rolling speed 1m / s, reductions are 25%, 35% and 50% respectively. figure 2 and image 3 For the present invention, samples are cut along the rolling direction and perpendicular to the rolling direction (as shown by serial numbers 2~3, 5 in the figure). The copper coating on the steel substrate surface was analyzed by ...

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Abstract

The invention relates to an on-line preparation method of a steel plate strip with an anti-damage corrosion-resistant copper-based coating. The method comprises the steps that firstly, mechanical cleaning is carried out on the surfaces of steel billets to be processed into steel plate strip products with different models and specifications; then copper-based powder is sprayed to the surfaces of the cleaned steel billets or the surfaces of the cleaned steel billets are coated with the copper-based powder to form a copper-based powder coating with the thickness of 1 millimeter to 5 millimeters;secondly, the steel billets with the copper-based powder coatings are sequentially subjected to muffle furnace heating, hot rolling treatment and annealing treatment, and copper-based coatings, on thesurfaces of the steel plate strips, with the thicknesses ranging from 15 microns to 50 microns are obtained; and finally, after the copper-based coatings on the surfaces of the steel plate strips arecleaned with dilute acid, the damage-resistant corrosion-resistant copper-based coatings are formed on the surfaces of the steel plate strips. According to the on-line preparation method of steel plate strip with anti-damage corrosion-resistant copper-based coating, the copper-based coatings can be directly and efficiently prepared on a high-temperature rolling production line, the on-site operability is high, workers can easily master the method, the production period is short, the production cost is low, and the method is suitable for industrial production of applying the copper-based coatings to the surfaces of the steel plate strips.

Description

technical field [0001] The invention relates to the technical field of surface treatment of steel strips, in particular to an on-line preparation method of an anti-damage and corrosion-resistant copper-based coating for steel strips. Background technique [0002] Marine infrastructure and ship construction require a large number of steel facilities, such as cross-sea bridges, offshore platforms, submarine pipelines, ships and submarines, etc. Corrosion of steel parts is particularly serious in marine environments. Copper-based alloy has good mechanical properties, corrosion resistance and anti-adhesion of marine microorganisms, and can be used as a protective coating to improve the damage resistance and corrosion resistance of the steel strip surface. [0003] At present, the conventional methods for preparing copper-based coatings on the surface of iron and steel materials include roll bonding, spraying, gas metal arc welding process and surface laser coating. In the proc...

Claims

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Application Information

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IPC IPC(8): C23C24/08
CPCC23C24/087
Inventor 万善宏易戈文王军阳姜军周文斌霄·安凯
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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