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Method for refining hot-dipping coating material by employing laser heat treatment

A technology of laser heat treatment and layer material, which is applied in the field of heat treatment of material surface and heat treatment of material surface coating.

Inactive Publication Date: 2015-05-20
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, laser remelting has a good application prospect in the grain refinement of hot-dip coatings. However, after consulting the relevant literature, it is found that the research on laser remelting grain refinement of hot-dip coatings has not been reported so far.

Method used

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  • Method for refining hot-dipping coating material by employing laser heat treatment
  • Method for refining hot-dipping coating material by employing laser heat treatment

Examples

Experimental program
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Effect test

Embodiment 1

[0025] In this example, see figure 1 and figure 2 , a method for laser remelting to refine hot-dip coating alloy grains, the specific steps are as follows: Mechanical treatment on the surface of the device-degreasing-washing-pickling-washing-preheating-dip-plating-water cooling. Fix the hot-dipped plate on the X-Y moving plate 6, and the laser beam 1 with the set power is emitted from the laser and hits the surface of the substrate 5 of the device to form a circular spot on the surface. Due to the thermal action of the laser, a molten pool 3 is formed on the surface of the substrate 5 . At the same time, the X-Y moving plate 6 drives the substrate 5 to move in the X and Y directions, so that the laser forms a melting channel on the substrate along the scanning direction v, and the overlapping part between the previous melting channel and the subsequent melting channel is the overlapping area. , and finally form a new layer of alloy layer 2 on the surface of the substrate, s...

Embodiment 2

[0031] This embodiment is basically the same as Embodiment 1, especially in that:

[0032] In the present embodiment, hot-dip plating experiment is as follows:

[0033] The surface of the sample is mechanically treated, degreasing, washing with water, pickling, washing with water, preheating, immersion plating, and water cooling. The specific steps are:

[0034] (1) This step is the same as in Example 1; (2) This step is the same as in Example 1; (3) This step is the same as in Example 1; (4) The weighed aluminum-zinc-silicon ingot (the composition is 55% Al-43.3%Zn-1.6%Si) was placed in a crucible, and the crucible was placed in a self-made dipping furnace, and 5L / min of 10%H 2 +N 2 Mix the gas to ensure a slight positive pressure in the furnace body, heat the crucible to 600°C, and perform the hot-dip plating experiment after the alloy ingot is completely melted; (5) This step is the same as that of Example 1.

[0035] Then the GL hot-dip coating is remelted by laser. Th...

Embodiment 3

[0037] This embodiment is basically the same as the previous embodiment, and the special features are:

[0038] Hot-dip plating experiments are as follows:

[0039] The surface of the sample is mechanically treated, degreasing, washing with water, pickling, washing with water, preheating, immersion plating, and water cooling. The specific steps are:

[0040] (1) This step is the same as in Example 1; (2) This step is the same as in Example 1; (3) This step is the same as in Example 1; (4) The weighed aluminum-zinc ingot (composition is 5%Al , 0.03% RE, and the balance is Zn) placed in the crucible, and put the crucible into a self-made dipping furnace, and passed 5L / min of 10%H 2 +N 2 Mix the gas to ensure the slight positive pressure of the furnace body, heat the crucible to 430°C, and perform the hot-dip plating experiment after the alloy ingot is completely melted; (5) This step is the same as that of Example 1.

[0041] Then the Galfan hot-dip coating is remelted by la...

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Abstract

The invention discloses a method for refining a hot-dipping coating material by employing laser heat treatment. The method comprises the following steps: preparing the hot-dipping coating material on the surface of an apparatus; carrying out laser remelting treatment on the coating material surface by the heat action of the laser to melt alloy on the coating surface; refining crystalline grains of hot-dipping coating alloy through quick cooling, wherein when the laser remelting treatment is performed on the hot-dipping coating material, the laser power for laser remelting selection is 1.0-2.0kw; the laser beam scanning speed is 10-20mm / s; and the diameters of light spots are 1-3mm. The crystalline grains of the coating are refined by a laser remelting method to improve the surface property of the coating material. According to the technology, the surface quality of the coating material can be effectively improved; the application range can be expanded; and the requirements of industrial production can be met.

Description

technical field [0001] The invention relates to a heat treatment method for the surface of a material, in particular to a heat treatment method for a coating on the surface of a material, and applies to the technical field of hot-dip coating strengthening. Background technique [0002] Hot-dip galvanizing is the main part of hot-dip galvanizing products. It has a long industrial production history, large product output, wide application range, and the coating has good corrosion resistance. The aluminum coating is silvery white, has superior appearance and decorative properties than the zinc coating, has excellent atmospheric corrosion resistance, and good heat reflection performance. The galvanized layer combines the advantages of aluminum plating and galvanizing at the same time. It has excellent atmospheric corrosion resistance, high temperature resistance and heat reflection ability and good welding performance of aluminum plated sheet; Cutting edge and scratch electroch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C2/28
CPCC23C2/285
Inventor 胡伟东吴广新张捷宇
Owner SHANGHAI UNIV
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