A Novel Composite Coating Surface Modified by Carbon Dioxide Laser

A laser surface modification and composite coating technology, applied in coatings, radiation-absorbing coatings, etc., can solve the problems of harmful gases generated by coating components, increased surface roughness of workpieces, micro-cracks, etc., and achieve uniform coating. Good performance, easy cleanup, cohesive effect

Inactive Publication Date: 2016-05-25
李光山
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The invention aims to solve many shortcomings of the existing light-to-heat conversion layer, such as the increase of the surface roughness of the coating after laser treatment, the appearance of micro-cracks between the grains of the workpiece surface, and the generation of harmful gases after the coating layer is decomposed by pyrolysis. ; On the premise of solving this problem, microalloying treatment is carried out on the surface of the workpiece at the same time to obtain a product with excellent comprehensive performance and achieve the purpose of improving the efficiency of laser use

Method used

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  • A Novel Composite Coating Surface Modified by Carbon Dioxide Laser
  • A Novel Composite Coating Surface Modified by Carbon Dioxide Laser
  • A Novel Composite Coating Surface Modified by Carbon Dioxide Laser

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Effect test

Embodiment 1

[0025] The coating is divided into two parts: A-type microalloying layer and B-type anti-oxidation layer; when coating on the surface of the workpiece, the A-type microalloying layer coating is evenly coated on the surface of the workpiece for 0.6 mm, and after it is completely dry, apply Brush B-type anti-oxidation layer coating, the thickness is 0.1mm; A-type microalloying layer is a suspension composed of mixed powder and mixed solvent; the mixed powder uses ultra-fine silica powder with a particle size of 3000 mesh as the laser-absorbing The main material of energy, sub-micron copper powder (Cu) as the main material of micro-alloying, 8000 mesh neodymium-iron alloy powder (NdFe) as auxiliary material to provide lattice porosity, zinc stearate (C 36 h 70 o 4 Zn) is used as a powder binder, and the mixed powder is obtained by using a ball mill for dry mixing and ball milling for 30 minutes; the mixed solvent is mixed with ethanol (C 6 h 12 o 6 ) as the main ingredient, b...

Embodiment 2

[0031] The coating is divided into two parts: A-type microalloying layer and B-type anti-oxidation layer; when coating on the surface of the workpiece, first apply the A-type microalloying layer paint evenly on the surface of the workpiece for 0.5mm, and then apply it after it is completely dry. Brush B-type anti-oxidation layer coating, the thickness is 0.2mm; A-type microalloying layer is a suspension composed of mixed powder and mixed solvent; the mixed powder uses ultra-fine silica powder with a particle size of 3000 mesh as the laser-absorbing The main material of energy, sub-micron copper powder (Cu) as the main material of micro-alloying, 8000 mesh neodymium-iron alloy powder (NdFe) as auxiliary material to provide lattice porosity, zinc stearate (C 36 h 70 o 4 Zn) is used as a powder binder, and the mixed powder is obtained by using a ball mill for dry mixing and ball milling for 30 minutes; the mixed solvent is mixed with ethanol (C 6 h 12 o 6 ) as the main ingred...

Embodiment 3

[0037] The coating is divided into two parts: A-type microalloying layer and B-type anti-oxidation layer; when coating on the surface of the workpiece, first apply the A-type microalloying layer paint evenly on the surface of the workpiece for 0.5mm, and then apply it after it is completely dry. Brush B-type anti-oxidation layer coating, the thickness is 0.1mm; A-type microalloying layer is a suspension composed of mixed powder and mixed solvent; the mixed powder uses ultra-fine silica powder with a particle size of 2000 mesh as the laser-absorbing The main material of energy, sub-micron copper powder (Cu) as the main material of micro-alloying, 8000 mesh neodymium-iron alloy powder (NdFe) as auxiliary material to provide lattice porosity, zinc stearate (C 36 h 70 o 4 Zn) is used as a powder binder, and the mixed powder is obtained by using a ball mill for dry mixing and ball milling for 30 minutes; the mixed solvent is mixed with ethanol (C 6 h 12 o 6 ) as the main ingred...

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Abstract

The patent of the present invention relates to a new type of composite coating for carbon dioxide laser surface modification, which is characterized in that the coating is divided into two parts: A-type micro-alloyed layer and B-type anti-oxidation layer; A-type micro-alloyed layer is a mixture of powder and A suspension composed of mixed solvents, in which the mixed powder is silicon dioxide, submicron copper powder, neodymium-iron alloy powder, zinc stearate; the mixed solvent is ethanol, boric acid, deionized water, polystyrene divinylbenzene Resin; type B anti-oxidation layer coating is a mixed powder composed of thymol and calcium stearate in a molar ratio of 1:1, and the solvent is octane. The beneficial effects of the patent of the present invention are: simultaneously improving the physical wear resistance and chemical corrosion resistance of the surface of the workpiece; using neodymium-iron alloy powder (NdFe) as an additive to provide lattice porosity, so that a silicon-rich layer is formed on the surface of the workpiece, Improved corrosion resistance; uniform coating, tight film formation, 85-92% laser absorption rate, easy to clean the residual coating on the surface.

Description

technical field [0001] The patent of the present invention relates to a workpiece pretreatment coating for surface modification of materials, especially a new type of composite coating applied to carbon dioxide laser for surface microalloying and quenching hardening treatment of materials. Background technique [0002] The thermal energy concentration effect of laser is widely used in the heat treatment process of materials, which has the remarkable advantages of high heat treatment efficiency and no environmental pollution. The high-power and high-energy-density laser beam is used to heat the surface of the material in a non-contact manner. With the help of the conductive cooling effect of the material surface itself, the surface of the metal material is heated or melted in an instant (milliseconds or even microseconds) and then cooled at a high speed. The technological methods to realize the surface modification of materials have attracted more and more attention of resear...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D1/09C21D1/70C09D1/00C09D5/32
Inventor 李光山
Owner 李光山
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