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Method for quickly preparing metal ceramic coating through laser induced composite fusioncast

A metal-ceramic coating and laser induction technology, which is applied in metal material coating process, coating, air transportation, etc., can solve the problems of easy cracking of metal-ceramic coating, small ceramic phase injection depth, and low volume percentage , to achieve excellent wear resistance, high volume percentage, and low burning loss

Inactive Publication Date: 2011-09-21
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for rapid preparation of cermet coatings by laser induction composite melting, which can solve the problem of low melting efficiency and small ceramic phase injection depth caused by the high reflectivity of the substrate to laser light during conventional laser melting Problems with low volume percentage and easy cracking of cermet coating

Method used

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  • Method for quickly preparing metal ceramic coating through laser induced composite fusioncast
  • Method for quickly preparing metal ceramic coating through laser induced composite fusioncast
  • Method for quickly preparing metal ceramic coating through laser induced composite fusioncast

Examples

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Effect test

example 1

[0039] Using the method of laser induction compound fusion injection, cast WC particles are directly injected into the surface of nickel superalloy GH4133 to form WC / Ni cermet coating. The volume percentage of WC particles in the cermet coating is 30%, the injection depth of WC particles is 0.8mm, and the area of ​​the coating is 100×150mm 2 .

[0040] The implementation process of this embodiment is:

[0041] (1) Selection of ceramic phase particles and preparation of substrate. Ceramic phase 8 is cast WC particles, composed of flaky WC+W 2 C has a crystal composition and an average particle size of 40 μm. It is placed in an incubator at 150° C. to dry for 2 hours, and then put into the loading hopper 7 of the automatic powder feeder 9 . The base material 14 is a nickel-based superalloy GH4133, and its chemical composition is (mass percentage) 0.032-0.038%C, 19-22%Cr, 0.05-0.07Si, 0.01-0.03Mn, 0.8-1.2%Al, 2.5-3% Ti, 1.2 ~ 1.4Nb, 0.002 ~ 0.003B, 0.01 ~ 0.02Fe, the balance ...

example 2

[0048] Using the method of laser induction composite melting injection, the MoSi 2 Particles are directly injected into the surface of TC4 alloy to form MoSi 2 / Ti cermet coating. The MoSi within the cermet coating 2 The volume percentage of particles is 50%, MoSi 2 The injection depth of the particles is 1.2mm, and the coating area is 120×180mm 2 .

[0049] The implementation process of this embodiment is:

[0050] (1) Selection of ceramic phase particles and preparation of substrate. Ceramic phase 8 is MoSi 2 The particles, whose average particle size is 50 μm, were placed in an incubator at 150° C. to dry for 2 hours, and then put into the hopper 7 of the automatic powder feeder 9 . The base material 14 is a TC4 alloy, its chemical composition is (mass percentage) 5.5-6.0% Al, 3.5-4.5% V, and the balance is Ti, and its surface is ready for use after derusting, degreasing, cleaning and sandblasting;

[0051] (2) The distance between the surface of the base material T...

example 3

[0057] Al 2 o 3 Particles are directly injected into the surface of cast aluminum alloy (Al-7wt.%Si) 2 o 3 / Al-Si cermet coating. Al in the cermet coating 2 o 3 The volume percentage of particles is 70%, Al 2 o 3The injection concentration depth of the particles is 2mm, and the coating area is 150×200mm 2 .

[0058] The implementation process of this embodiment is:

[0059] (1) Selection of ceramic phase particles and preparation of substrate. Ceramic phase 8 is Al 2 o 3 The particles, whose average particle size is 60 μm, were placed in an incubator at 150° C. to dry for 2 hours, and then put into the loading hopper 7 of the automatic powder feeder 9 . The base material 14 is cast aluminum alloy (Al-7wt.% Si), and its surface is ready for use after derusting, degreasing, cleaning and sandblasting;

[0060] (2) Adjust the distance between the surface of the base material casting aluminum alloy (Al-7wt.% Si) 14 and the induction heating coil 10 to 8mm, feed the cu...

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Abstract

The invention discloses a method for quickly preparing metal ceramic coating through laser induced composite fusioncast. The method comprises the following steps that: (1) a high-melting point and high-hardness ceramic phase is put into a hopper of an automatic powder feeder; (2) the ceramic phase is prevented from being oxidized at a high temperature; (3) a focused laser beam and a powder nozzle of the automatic powder feeder are positioned in an induced heating area to compound a laser heating source and an induced heating source; (4) the moving space is 80 to 20 percent of the diameter of a laser light spot; and (5) the work is finished. The method has the advantages that: the injection depth of the ceramic phase is high in a base material; the volume percent content is high; the chemical components of the metal ceramic coating and the base material are in slow gradient transition; the burning loss of the ceramic phase is low in the process of laser induced composite fusioncast; the obtained metal ceramic coating has a series of excellent properties, such as dense organization, high hardness, high toughness, high wear resistance, no air holes and cracks and the like.

Description

technical field [0001] The invention relates to a method for preparing a cermet coating, in particular to a method for rapidly preparing a cermet coating by laser induction composite melt injection. Background technique [0002] Prepare a cermet coating with high hardness and high wear resistance on the surface of a substrate with certain plasticity, which can not only give full play to the advantages of plasticity and toughness of the substrate, but also make full use of the high hardness and high wear resistance of the cermet coating Performance, thereby greatly improving the overall performance of the substrate (combination of high strength, high toughness, high hardness and high wear resistance). Therefore, the preparation technology of cermet coating has broad application prospects in the manufacture of wear-resistant components and the surface strengthening and repair of key components. [0003] At present, the technologies for preparing cermet coatings mainly include...

Claims

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Application Information

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IPC IPC(8): C23C24/10
CPCY02T50/60
Inventor 周圣丰戴晓琴刘光明杜楠
Owner NANCHANG HANGKONG UNIVERSITY
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