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Method for crack resistant treatment of laser cladded nano-ceramic coating

A technology of laser cladding and treatment method, applied in the direction of coating, metal material coating process, etc., can solve the problems of cladding ceramic coating cracks and other problems, and achieve the effect of excellent strength, toughness and excellent mechanical properties

Inactive Publication Date: 2004-11-03
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies and defects of the above-mentioned prior art, solve the problem of cracks in the cladding ceramic coating on the surface of the metal substrate, and provide a crack-resistant treatment method for laser cladding nano-ceramic coating

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0031] Embodiment 1. laser cladding without crack carbide ceramic coating on the surface of stainless steel substrate, its specific steps are:

[0032] ①. On the surface to be treated of 1Cr18Ni9 stainless steel substrate, first spray welding nickel-based self-fluxing alloy; ②. Then spray nano-granulation material (NF) WC / Co; ③. Then apply nano-absorbing laser coating; ④. Then use power The density is 9.436×10 3 W / cm 2 , scanning speed of 8 ~ 10mm / s CO 2 Laser cladding, using Ar gas protection during laser cladding, without preheating and postheating, can produce crack-free tungsten carbide ceramic (WC / Co) coatings.

Embodiment 2

[0033] Embodiment 2. laser cladding non-crack carbide ceramic coating on the surface of stainless steel substrate, its specific steps are as follows:

[0034] ①. On the surface to be treated of 1Cr18Ni9 stainless steel substrate, first spray welding nickel-based self-fluxing alloy; ②. Then spray nano-granulation material (NF) WC / Co; ③. Then apply nano-absorbing laser coating; ④. Then use power The density is 1.07×10 4 W / cm 2 , scanning speed of 10 ~ 12mm / s CO 2 Laser cladding, using Ar gas protection during laser cladding, without preheating and postheating, can produce crack-free carbide ceramic (WC / Co) coatings.

Embodiment 3

[0035] Embodiment 3. laser cladding on the surface of carbon steel without crack carbide ceramic coating, its specific steps are as follows: 1. spray welding nickel self-fluxing alloy on the surface to be treated of 45# carbon steel substrate; 2. spray nano Granulated material (NF) WC / Co; ③. Then apply nano-absorbing laser coating; ④. Then use a power density of 1.07×10 4 W / cm 2 , scanning speed of 10 ~ 12mm / s CO 2 Laser cladding, using Ar gas protection during laser cladding, without preheating and postheating, can make a crack-free carbide ceramic (WC / Co) coating on the surface of carbon steel.

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Abstract

The treating process of laser smelting and coating nano anti-cracking ceramic coating onto the surface of metal substrate includes the following steps: bottoming the metal surface to be treated; spraying nano ceramic grain material; painting nano laser absorbing paint; and smelting and coating with high power CO2 laser under protecting Ar atmosphere. The nano anti-cracking ceramic coating formed on the surface of metal substrate has excellent physical and chemical performance.

Description

Technical field: [0001] The invention relates to metal surface treatment, in particular to an anti-crack treatment method for laser cladding nano-ceramic coating. Background technique: [0002] Laser cladding technology uses a high-energy-density laser beam to form an alloy coating that is metallurgically bonded to the substrate and has different components and properties on the surface of the substrate, so that a high-performance surface can be made on a general metal substrate. It has important application fields and development prospects in manufacturing industries such as automobiles, aviation, aerospace, power stations, shipbuilding, mechatronics machining centers, and national defense industries. However, since laser cladding is a complex physical, chemical and metallurgical process, tensile stress is easily generated during rapid laser heating and cooling and melting and solidification, which will lead to cracking of weak links in the cladding layer. Cracking has bec...

Claims

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Application Information

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IPC IPC(8): C23C24/10
Inventor 张光钧王慧萍戴建强奚文龙戈大钫
Owner SHANGHAI UNIV OF ENG SCI
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