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A method of making furnace roll coating of automobile sheet production line using explosive spraying process

A technology of explosive spraying and automotive plates, which is applied in the direction of metal material coating process, coating, fusion spraying, etc., can solve the problems that cannot meet the requirements of high-end automotive plates and cannot be used as automotive plates

Active Publication Date: 2016-03-16
BEIJING JUNSHAN SURFACE TECH ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The high-temperature furnace roll coating made by explosive spraying can solve the problem of the service life of the furnace roll, but because the existing explosive spraying is a pulsed spraying method, it will leave marks on the surface of the furnace roll, and these marks cannot pass through Simple polishing and other methods to remove
Such furnace rolls will have very small marks on the surface of the steel plate produced on the production line, and can only be used as a building or home appliance plate, not as an automotive plate, and even more unable to meet the requirements of high-end automotive plates
[0005] Many companies and research institutions have conducted research on this, but none of these marks can be completely eliminated during the pulsed spraying process.

Method used

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  • A method of making furnace roll coating of automobile sheet production line using explosive spraying process
  • A method of making furnace roll coating of automobile sheet production line using explosive spraying process
  • A method of making furnace roll coating of automobile sheet production line using explosive spraying process

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Effect test

Embodiment 1

[0034] The roll body used in this example is a high-temperature furnace roll with a specification of φ800×2000 mm; the surface roughness Ra of the furnace roll is 0.8 μm-1.2 μm; the spray powder used in this example is 70% CoCrTaAlY+30% Al 2 o 3 Powder (cobalt-chromium-aluminum-yttrium-tantalum alloy powder produced by the Metal Institute of Beijing General Research Institute of Mining and Metallurgy);

[0035] Follow the steps below:

[0036] 1) Surface pretreatment:

[0037] a) Clean the surface of the furnace roll with washing powder solution first; b) Clean the surface of the furnace roll with acetone, dry at room temperature and evaporate the acetone to dryness; c) preheat the surface of the furnace roll to 70°C; d) use 46 mesh white corundum on the surface of the furnace roll Carry out sandblasting, and the linear speed of the furnace roller during sandblasting is 15 m / min;

[0038] b) Keep the surface temperature of the furnace roller at 70°C, use oxygen and acetylen...

Embodiment 2

[0042] The roll body used in this example is a high-temperature furnace roll with a specification of φ900×1950 mm; the surface roughness Ra of the furnace roll is 0.8 μm-1.2 μm; the spray powder used in this example is 70% CoCrTaAlY+10% Al 2 o 3 Powder (CPP17 alloy powder produced by American CPP Company);

[0043] Follow the steps below:

[0044] 1) Surface pretreatment:

[0045] a) Clean the surface of the furnace roll with washing powder solution first; b) Clean the surface of the furnace roll with acetone, dry at room temperature and evaporate the acetone to dryness; c) preheat the surface of the furnace roll to 70°C; d) use 46 mesh white corundum on the surface of the furnace roll Carry out sandblasting, and the linear speed of the furnace roller during sandblasting is 25 m / min;

[0046]b) Keep the surface temperature of the furnace roller at 70°C, use oxygen and acetylene to ignite to generate an explosion wave, and the oxygen flow rate is 0.80m 3 / hour, the oxygen ...

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Abstract

The invention provides a method for preparing a furnace roller coating of an automobile plate production line by using a detonation spraying process. The method comprises the following steps of: rotating a roller body along the axial line of the roller body, wherein the roller body with surface roughness Ra being less than 1.6 micrometers is used as a base material, the rotation velocity of the roller body is n rpm, the rotation linear velocity of the roller body is S which is between 0.1-10m / m; spraying alloy powder serving as a coating raw material on the surface of the roller body by using detonation spraying equipment, wherein the detonation frequency of the detonation spraying equipment is f per second, the displacement of the spray gun of the detonation spraying equipment is M millimeters / revolution / minute, n, S, f and M meet the following relation: M=n*f, and when S=1-2, f=4, or when S=2-3, f=6, or when S=3-4, f=8. The roller body treated according to the method provided by the invention is without trace left after by spraying and can meet the requirement of a high-end automobile plate production line on the surface quality of the roller body.

Description

technical field [0001] The invention relates to a method for manufacturing a furnace roll coating of an automobile sheet production line by using an explosive spraying process, and belongs to the technical field of methods for manufacturing the furnace roll coating of an automobile sheet production line. Background technique [0002] Cold-rolled sheets and galvanized sheets are indispensable and important materials in national production. Many fields such as construction, home appliances, electronics, and automobiles use cold-rolled sheets as raw materials to produce products. Of course, the requirements for the surface quality of steel sheets are also different. Steel sheets for automobiles have the highest requirements, especially the requirements for high-quality automobile sheets can be called harsh. It is difficult for domestic iron and steel enterprises to produce steel plates for high-end automobiles. Most of the high-quality automotive plates rely on imports. The few...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C4/126C23C4/06
Inventor 吴旭
Owner BEIJING JUNSHAN SURFACE TECH ENG