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Adhesive agent for preset coating for laser surface alloying as well as preparation method and use thereof

A surface alloying and pre-coating technology, which is applied in the coating process and coating of metal materials, can solve the problems of poor spreadability of metal powder, easy falling off of the alloyed layer, and low bonding strength, so that the thickness is easy to control, Fast drying and cost-effective results

Inactive Publication Date: 2009-04-29
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the laser alloying pre-coating adhesive is borrowed from traditional polyvinyl chloride (PVC) and cellulose acetate. These adhesives have low bonding strength with the substrate, the alloyed layer is easy to fall off, and the spreadability of the metal powder is poor. , the process of laser processing produces a lot of smoke and dust, which has certain pollution to the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1 of the present invention: Preparation of adhesive for laser surface alloying pre-coating: weigh polyvinyl acetate 30g, bentonite 5g, Y 2 o 3 5g and 950g of absolute ethanol, first heat the absolute ethanol to 80°C, add polyvinyl acetate, keep warm and stir continuously for 25min to fully dissolve, then add bentonite and Y 2 o 3 , Stir continuously until it is completely dissolved, and the adhesive product is obtained.

[0020] The application of the prepared adhesive in the bonding of laser alloyed pre-coated powder of low and medium carbon steel: the alloyed powder is placed in the adhesive, stirred evenly, and then evenly coated on the low , Medium carbon steel substrate surface.

Embodiment 2

[0021] Embodiment 2 of the present invention: Preparation of adhesive for laser surface alloying pre-coating: weigh polyvinyl acetate 40g, bentonite 10g, Y 2 o 3 10g and 940g of absolute ethanol, first heat the absolute ethanol to 85°C, add polyvinyl acetate, keep warm and keep stirring for 20min to fully dissolve, then add bentonite and Y 2 o 3 , Stir continuously until it is completely dissolved, and the adhesive product is obtained.

[0022] The application of the prepared adhesive in the bonding of laser alloyed pre-coated powder of low and medium carbon alloy steel: put the alloyed powder in the adhesive, stir evenly, and then evenly coat the low and medium carbon alloy steel The surface of the medium carbon alloy steel substrate is sufficient.

Embodiment 3

[0023] Embodiment 3 of the present invention: Preparation of adhesive for laser surface alloying pre-coating: weigh polyvinyl acetate 50g, bentonite 7g, Y 2 o 3 8g and 930g of absolute ethanol, first heat the absolute ethanol to 75°C, add polyvinyl acetate, keep warm and keep stirring for 30min to fully dissolve, then add bentonite and Y 2 o 3 , Stir continuously until it is completely dissolved, and the adhesive product is obtained.

[0024] The application of the prepared adhesive in the bonding of low-, medium-carbon steel or low-medium carbon alloy steel laser alloyed pre-coated powder: place the alloyed powder in the adhesive, stir evenly, and then It can be evenly coated on the surface of low and medium carbon steel or low and medium carbon alloy steel substrate.

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PUM

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Abstract

The invention discloses an adhesive for laser surface-alloyed preset coatings, as well as a preparation method and application thereof. The adhesive consists of the following raw material components in weight portion: 2 to 5 portions of poly (vinylethyl ester), 0.5 to 1 portion of bentonite, 0.5 to 1 portion of Y2O3 and 90 to 95 portions of anhydrous ethanol. Compared with the prior art, the adhesive has the advantages that raw materials used are easy to get and low in cost; the adhesive is wide in application range, can be used for bonding laser surface-alloyed preset coating powder of low / medium-carbon steel or low / medium-carbon alloy steel, and is high in binding force with metal matrixes and good in fluidity; the thickness of the preset coating is easy to control; and the adhesive can ensure that alloyed powder is more uniformly spread on the surfaces of metal matrixes, and is high in the drying speed of the preset coating, free from toxicity and pungent odor, little in smoke dust produced in a processing course, high in cost performance and convenient to brush and wipe off.

Description

Technical field: [0001] The invention relates to an adhesive for laser surface alloying pre-coating and its preparation method and application, in particular to an adhesive for laser surface alloying pre-coating of low- and medium-carbon steel or low-medium carbon alloy steel. A bonding agent and a preparation method thereof belong to the technical field of metallurgy. Background technique: [0002] Laser surface alloying is an important part of material surface modification. It uses the characteristics of rapid heating and melting of high-energy-density laser beams to melt and mix the surface layer of the substrate and the added alloy elements to form a surface based on the original substrate. Alloyed layer. According to the addition method of alloying elements, it can be divided into three categories, namely preset laser alloying, powder feeding laser alloying and gas laser alloying. At present, the most widely used is preset laser alloying. The methods of presetting al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10
Inventor 刘其斌孙桂祥寇继磊
Owner GUIZHOU UNIV