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Surface coating method of metal strip

A metal strip and surface coating technology, applied in the field of metal surface treatment, can solve the problem of low production efficiency and achieve the effects of improved production efficiency, high speed and high film adhesion

Active Publication Date: 2020-10-02
PANZHIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after it is heated to 300-500°C, high-purity argon gas is introduced into the vacuum chamber of the coating equipment, the bias power is turned on, and the workpiece is bombarded and cleaned, so the production efficiency is not high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0035] One embodiment is as follows: the magnetic field strength condition of plasma etching in step a is: 10-60 mT; the positive and negative pulse duty ratio of the power supply for plasma etching in step a is preferably 40-80%; the plasma etching in step a The etching power is preferably 1-50KW.

[0036] One embodiment is: the base distance of the plasma etching target in step a is 50-200 mm.

[0037] One embodiment is: the power supply conditions in step a are: frequency 10-100KHz, working voltage 200-1200V.

[0038] Experiments have proved that the starting condition of the DC sputtering power supply is poor, and it is easy to generate arcs. Plasma etching is easy to catch fire when the steel strip is running. And the sputtered iron atoms (atom groups) will make the surface of the anode insulating layer polluted and conductive. Preferably a pulsed power supply is used.

[0039] One embodiment is: the plasma etching in step a cleans the base of the metal strip by 1-50 ...

Embodiment 1

[0051] Put the titanium coating material with a purity of 99.8% into the surface coating equipment for metal strips, take the ST12 steel coil with a width of 500mm and a thickness of 0.5mm as the base material, and put the ST12 base material into the winding system. The vacuum degree of the working chamber of the plasma etching chamber is controlled to 2×10 through the 8 pre-vacuum pre-treatment chambers and the 8 post-vacuum pre-treatment chambers. -3 Pa. The flow rate of the Ar gas introduced was 650 sccm (standard cubic centimeter per minute). The vacuum degree of the working chamber is kept at 6×10 -1 Pa. Control power conditions are: frequency 20KHz, working voltage 400V. The positive and negative pulse duty cycle of the power supply is 60%. Plasma etching power 2KW. The base distance of the plasma etching target is 80 mm, and the discharge width is 200 mm. The magnetic field strength condition was 10 mT. The moving speed of ST12 steel coil is 1m / min. Electron bea...

Embodiment 2

[0056] Put the titanium coating material with a purity of 99.8% into the surface coating equipment for metal strips, using Q235 steel plate with a width of 400mm and a thickness of 1mm as the base material, through 8 vacuum pretreatment chambers at the front and 8 at the back The vacuum pretreatment chamber controls the vacuum degree of the working chamber of the plasma etching chamber to be 2×10 -3 Pa. The flow rate of the Ar gas introduced was 1200 sccm (standard cubic centimeter per minute). The vacuum degree of the working chamber is kept at 6×10 -1 Pa. The target base distance is 70mm. Control power conditions are: frequency 30KHz, working voltage 1000V. The positive and negative pulse duty cycle of the power supply is 60%. Plasma etching power 9KW. The target base distance of plasma etching is 80mm, and the discharge width is 500mm. The magnetic field strength condition was 40 mT. The moving speed of Q235 steel coil is 5m / min. Electron beam coating is adopted, a...

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Abstract

The invention relates to a surface coating method of a metal strip, and belongs to the technical field of metal surface treatment. The surface coating method of the metal strip comprises the followingsteps: a, at vacuum degree 1-10<-2>Pa, using Ar with flux of 50-4000sccm to directly perform plasma etching for the metal strip, and stopping plasma etching when temperature of the metal strip reaches 200-1200 DEG C; preferably, stopping plasma etching when the temperature of the metal strip reaches 300-800 DEG C; b, after stop of plasma etching in the step a, immediately using electron beam evaporation coating to perform coating on the metal strip. In the method provided by the invention, direct evaporation coating is executed after using a special plasma etching technology, continuous production is realized, and production efficiency is improved greatly. Steel strip etching under a dynamic condition can be realized. The method has the characteristics of low cost, no pollution, high speed, high film layer adhesive force and high efficiency, a coated metal composite material prepared has good quality, so the method is worth popularization and application.

Description

technical field [0001] The invention relates to a surface coating method for a metal strip, which belongs to the technical field of metal surface treatment. Background technique [0002] Metal surfaces generally require painting, pattern printing or surface coating. The purpose of these surface treatments is to artificially form a surface layer on the surface of the base material that has different mechanical, physical and chemical properties from the base. More advanced surface treatment includes chemical vapor deposition CVD, physical vapor deposition PVD, ion implantation, ion plating, laser surface treatment, etc. The purpose of surface treatment is to meet the corrosion resistance, wear resistance, decoration or other special functional requirements of the product. [0003] For metal surface processing, chemical vapor deposition CVD, physical vapor deposition PVD, ion implantation, ion plating, and laser surface treatment often require operations such as cleaning, swe...

Claims

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Application Information

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IPC IPC(8): C23C14/02C23C14/30C23C14/56
CPCC23C14/022C23C14/30C23C14/562
Inventor 赖奇李亮廖先杰刘翘楚
Owner PANZHIHUA UNIV
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