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Production method of single-sided clad steel sheet and single-sided clad steel sheet

A technology of coated steel plate and production method, which is applied in the direction of coating, metal material coating technology, etc., can solve the problems that are difficult to achieve, and achieve the effect of good toughness and easy industrialization

Inactive Publication Date: 2011-04-20
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage of this method is that the existing coating unit can be used, but the problem is how to make the strip into double layers, and it must be ensured that the molten plating solution does not enter the interlayer during the coating process, and at the same time ensure that the strip steel plate shape and coating good quality
However, this method requires that the contact surface between the steel plate and the plating roller must have no gaps, which is difficult to achieve in actual production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Single side aluminized steel plate:

[0025] In the continuous production line, the steel plate is first cleaned with lye, and the activation method is 95% N in the continuous annealing furnace. 2 5%H 2 Reductive protective atmosphere annealing; then use supersonic cold air power spraying equipment to carry out single-sided cold spraying, the powder used for spraying is aluminum powder, the temperature of the powder is room temperature, the diameter is 5 microns, the gas used for spraying is nitrogen, and the pressure is 3MPa, resulting in a thickness of 50 micron coated steel sheet on one side; followed by continuous annealing at 95% N 2 5%H 2 Carry out heat treatment under a reducing protective atmosphere, heat treatment temperature is 700°C, time is 3 seconds, and immediately cooled rapidly at a speed greater than 10°C / s to obtain a single-sided coated steel plate with good bonding performance; then the steel plate is leveled, stretched and straightened, and passiv...

Embodiment 2

[0027] Single side galvanized steel sheet:

[0028] In the continuous production line, the steel plate is first cleaned with lye, and the activation method is 95% N in the continuous annealing furnace. 2 5%H 2 Reducing protective atmosphere annealing; then use supersonic cold air power spraying equipment to carry out single-sided cold spraying, the powder used for spraying is zinc powder, the temperature of the powder is room temperature, the diameter is 25 microns, the gas used for spraying is nitrogen, and the pressure is 5MPa, and the thickness is 100mm. micron coated steel sheet on one side; followed by continuous annealing at 95% N 2 5%H 2 Carry out heat treatment under a reducing protective atmosphere, the heat treatment temperature is 470°C, the time is 5 seconds, and immediately cool at a speed greater than 10°C / s to obtain a single-sided coated steel sheet with good bonding performance; deal with.

Embodiment 3

[0030] Single-sided galvanized (55%Al43.4%Zn1.6%Si) steel plate:

[0031] In the continuous production line, the steel plate is electrolytically cleaned first, and the activation method is in the continuous annealing furnace at 70% N 2 30%H 2 Reductive protective atmosphere annealing; then use supersonic cold air power spraying equipment for single-sided cold spraying, the powder used for spraying is aluminum-zinc (55%Al43.4%Zn1.6%Si) alloy powder, the powder temperature is 200 ° C, the diameter is 45 Micron, the gas used for spraying is a mixed gas of 90% nitrogen and 10% helium, and the pressure is 8MPa to obtain a single-sided coated steel plate with a thickness of 200 microns; then in a continuous annealing furnace at 95% N 2 5%H 2 Heat treatment is carried out under a reducing protective atmosphere, the heat treatment temperature is 600°C, and the time is 8 seconds, and then the thickness of the coating is controlled by an air knife to obtain an aluminum-zinc coating wi...

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Abstract

The invention discloses a production method of a single-sided clad steel sheet and the single-sided clad steel sheet. The production method comprises: firstly, cleaning the steel sheet; and then carrying out surface activation. The production method is characterized in that cold spraying processing equipment is used for carrying out single-sided cold spraying on the steel sheet; then, the sprayed steel sheet is subject to heat treatment for 3-60 seconds at the coating melting point temperature of about 100 DEG C under the protective atmosphere in a continuous annealing furnace; and after being heated, the sprayed steel sheet is immediately cooled to room temperature in the continuous annealing furnace. The cladding of the obtained single-sided clad steel sheet can be various types of metals or alloys, the cladding thickness of the obtained single-sided clad steel is 5-1000 microns, and the alloy layer thickness of the obtained single-sided clad steel is less than 3 microns. The production method is practical and efficient and is easy to realize industrialization.

Description

technical field [0001] The invention belongs to the technical field of spray coating and hot-dip plating, and in particular relates to a production method of a single-sided coated steel plate and the single-sided coated steel plate. Background technique [0002] At present, the practical and efficient technology for obtaining the metal protective coating of strip steel adopts the continuous production method of molten metal hot-dip plating, and the obtained coating is double-sided. However, in some fields of application, one-sided coating can meet the requirements, or even only one-sided coating is required. For example, under some special requirements, a single-sided aluminum-coated plate must be used. [0003] In this case, it is particularly important how to obtain single-sided coated steel sheets practically and efficiently: [0004] The existing patented technology has the following methods: [0005] The first one, such as CN88102919A and CN101338433A, sends double-la...

Claims

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Application Information

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IPC IPC(8): C23F17/00C21D1/26C23C24/00
Inventor 吕家舜李锋
Owner ANGANG STEEL CO LTD
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