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 s

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

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0038] Example one

[0039] Using the laser induction composite melting method, the cast WC particles are directly injected into the surface of the nickel superalloy GH4133 to form a 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 coating area 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 flake WC+W 2 C. Its crystal composition, with an average particle size of 40 μm, is placed in an incubator at 150° C. for drying for 2 hours, and then placed in the 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 is Ni, t...

Example Embodiment

[0047] Example two

[0048] Using laser induction composite melting method, MoSi 2 Particles are directly injected into the surface of TC4 alloy to form MoSi 2 / Ti cermet coating. MoSi in the cermet coating 2 The volume percentage of the 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 with an average particle size of 50 μm are dried in an incubator at 150° C. for 2 hours, and then put into the hopper 7 of the automatic powder feeder 9. The base material 14 is TC4 alloy, its chemical composition is (mass percentage) 5.5-6.0% Al, 3.5-4.5% V, the balance is Ti, and its surface is ready for use after rust removal, degreasing, cleaning and sandblasting treatments;

[0051] (2) Adjust the distance between the surface of the substrate TC4 alloy 14 and ...

Example Embodiment

[0056] Example three

[0057] Using laser induction composite melting method, the Al 2 O 3 Particles are directly injected into the surface of cast aluminum alloy (Al-7wt.%Si) to form Al 2 O 3 / Al-Si cermet coating. Al in the cermet coating 2 O 3 The volume percentage of the particles is 70%, Al 2 O 3 The injection 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 with an average particle size of 60 μm are dried in an incubator at 150° C. for 2 hours, and then put into the 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 rust removal, degreasing, cleaning and sandblasting treatments;

[0060] (2) Adjust the distance between the surface of the base material cast aluminum alloy (Al-7wt.%Si) 14 and...

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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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