Method for preparing wear-resisting high-temperature resisting oxidation NiCr-Cr3C2 metal ceramic coating

A technology of cermet coating and high temperature oxidation resistance, which is applied in the direction of metal material coating technology, metal processing equipment, coating, etc., and can solve problems that cannot meet engineering applications.

Inactive Publication Date: 2011-03-23
SHENYANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]In general, when adding Cr3C2 particles during laser cladding, the remaining Cr3C2 is less, due to the Cr7 produced by the decomposition of Cr3C2 The melting point and hardness of sub>C3 and Cr23C6 are much smaller than Cr3C 2, can not meet the engineering application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] A kind of wear-resisting and high-temperature-resisting oxidation NiCr-Cr 3 C 2 The preparation method of cermet coating comprises the following steps:

[0013] 1. A wear-resistant and high-temperature oxidation-resistant NiCr-Cr 3 C 2 The raw material powder of the cermet coating has the following components in mass percent: nickel 20.1, chromium 69.0, carbon 9.0, silicon 0.5, boron 0.3, and yttrium oxide 0.2. The above-mentioned raw material powders were placed in a sealed container, put into a mixer and mixed for 1 hour.

[0014] 2. Laser cladding uses a 15 mm thick medium carbon steel plate as the base material. Use a No. 500 SiC grinding wheel to grind the base material into a smooth and smooth surface, and use absolute ethanol and acetone to remove oil. Overlay 2.2mm thick. Then design the S-type cladding route by CAD. The laser used for laser cladding is 5 kW CO 2 The process parameters of the laser are: power 2.5 kilowatts, spot diameter 2.5 millimeters, ...

Embodiment 2

[0017] A kind of wear-resisting and high-temperature-resisting oxidation NiCr-Cr 3 C 2 The preparation method of cermet coating comprises the following steps:

[0018] 1. A wear-resistant and high-temperature oxidation-resistant NiCr-Cr 3 C 2 The raw material powder of the cermet coating has the following components in mass percent: nickel 19.3, chromium 69.3, carbon 9.2, silicon 0.6, boron 0.5, and yttrium oxide 1.1. The above-mentioned raw material powders were placed in a sealed container, put into a mixer and mixed for 2 hours.

[0019] 2. Laser cladding takes medium carbon steel plate with a thickness of 25 mm as the base material, grinds the base material to a smooth and smooth surface with a No. Overlay 2.0 mm thick. Then design the S-type cladding route by CAD. The laser used for laser cladding is 5 kW CO 2 The process parameters of the laser are: power 3.5 kilowatts, spot diameter 3.5 millimeters, scanning speed 20 millimeters per second, overlap 40 percent, pr...

Embodiment 3

[0022] A kind of wear-resisting and high-temperature-resisting oxidation NiCr-Cr 3 C 2 The preparation method of cermet coating comprises the following steps:

[0023] 1. A wear-resistant and high-temperature oxidation-resistant NiCr-Cr 3 C 2 The raw material powder of the cermet coating has the following components in mass percent: nickel 19.4, chromium 67.0, carbon 9.3, silicon 1.8, boron 1.2, and yttrium oxide 1.3. The above-mentioned raw material powders were placed in a sealed container, put into a mixer and mixed for 1.5 hours.

[0024] 2. Laser cladding uses a 30 mm thick medium carbon steel plate as the base material. Use a No. 500 SiC grinding wheel to grind the base material into a smooth and smooth surface, and use absolute ethanol and acetone to degrease it. Overlay 2.5mm thick. Then design the S-type cladding route by CAD. The laser used for laser cladding is 5 kW CO 2 The process parameters of the laser are: power 3.0 kilowatts, spot diameter 3.0 millimete...

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Abstract

The invention discloses a method for preparing a wear-resisting high-temperature resisting oxidation NiCr-Cr3C2 metal ceramic coating, which comprises the following steps of: 1. preparing according to a formula; 2. laser caldding preparation mehtod; and 3. thermal treatment process. In the method for preparing the metal ceramic coating, a nickle-based solid solution is used as a binder and Cr3C2 is used as an enhancing phase, thereby avoiding generating a large amount of Cr7C3 and Cr23C6.

Description

technical field [0001] The invention belongs to the field of composite materials, and is a wear-resistant, high-temperature oxidation-resistant NiCr-Cr 3 C 2 Formulation of laser cladding coating and its preparation method. The coating is used in the field of coating or laser remanufacturing for wear resistance, high temperature corrosive gas or fly ash erosion resistance and hard surface wear resistance at a high temperature of 540-980 °C, and belongs to the field of industrial coating or laser remanufacturing . Background technique [0002] Chromium carbide-reinforced composite coatings are often used as wear-resistant, corrosion-resistant, high-temperature oxidation-resistant and thermal barrier coatings. The usual manufacturing process is thermal spraying, plasma spraying, high-velocity flame spraying, etc. The coatings prepared by the above three methods are prone to porosity, looseness, insufficient bonding force, and falling off, and are not suitable for workpiece...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10B23K26/34
Inventor 贺春林娄德元才庆魁马国峰李海松张金林
Owner SHENYANG UNIV
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