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A kind of chromium carbide cermet composite powder, coating and preparation method thereof

A metal-ceramic composite, chromium carbide technology, applied in metal material coating process, coating, melt spraying and other directions, to achieve the effect of convenient operation, simple method and strong practicability

Active Publication Date: 2022-04-29
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the shortcomings of the above-mentioned existing chromium carbide cermet composite coating and improve its high-temperature oxidation performance, the present invention provides a chromium carbide cermet composite powder, coating and preparation method thereof

Method used

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  • A kind of chromium carbide cermet composite powder, coating and preparation method thereof
  • A kind of chromium carbide cermet composite powder, coating and preparation method thereof
  • A kind of chromium carbide cermet composite powder, coating and preparation method thereof

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preparation example Construction

[0026] The preparation method of the above oxidation-resistant, wear-resistant, erosion-resistant chromium carbide cermet composite powder and coating comprises the following steps:

[0027] 1) Select a particle size of 15-45 μm nickel-chromium-chromium carbide (Cr 3 C 2 -25% NiCr) spherical powder (its composition is: 75% Cr 3 C 2 , 25% NiCr) and a particle size of 15-45 μm cobalt, chromium, molybdenum (Co, Cr, Mo) spherical powder, the powder is weighed according to the following ratio: Cr 3 C 2Ni: 63.75-67.5%, Ni: 17-18%, Cr: 7.29-8.43%, Co: 6.58-9.87%, Mo: 0.63-0.95%. After the proportioning is completed, mix the powder evenly, then put it in a ball mill jar, add balls according to the ball-to-material ratio of 5:1, and add absolute ethanol to two-thirds of the ball mill jar, then seal the ball mill jar and place it in The ball mill is used for 1-2 hours to achieve the homogenization of the composite powder without damaging the shape of the original powder particles. ...

Embodiment 1

[0036] Nickel-chromium-chromium carbide (Cr 3 C 2 -25% NiCr) spherical powder (its composition is: 75% Cr 3 C 2 , 25% NiCr) and a particle size of 15-45 μm cobalt, chromium, molybdenum (Co, Cr, Mo) spherical powder, the powder is weighed according to the following ratio: Cr 3 C 2 : 63.75%, Ni: 17%, Cr: 8.43%, Co: 9.87%, Mo: 0.95%. After the proportioning is completed, mix the powder evenly, then put it in the ball mill jar, add balls according to the ball-to-material ratio of 5:1, and add absolute ethanol to two-thirds of the ball mill jar, then seal the ball mill jar and place it in the ball mill Ball milled for 1.5 hours. After ball milling, put the slurry in a vacuum drying oven for drying treatment. The drying temperature was set at 80° C. and the drying time was 12 hours. The surface of the FV520B stainless steel substrate is sandblasted using the high-pressure air sandblasting method described above. The specific process conditions are: use 30-50 mesh brown corundum...

Embodiment 2

[0041] The nickel-chromium-cobalt-molybdenum-chromium carbide powder coating with different element ratios is prepared in the same manner as in Example 1.

[0042] Table 1

[0043]

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Abstract

The invention belongs to the field of cermets, and relates to a chromium carbide cermet composite powder, a coating and a preparation method thereof. In terms of mass fraction, each component in the powder is respectively Cr 3 C 2 : 63.75‑67.5%, Ni: 17‑18%, Cr: 7.29‑8.43%, Co: 6.58‑9.87%, Mo: 0.63‑0.95%. The above-mentioned composite powder is sprayed by a supersonic spraying system to prepare a chromium carbide cermet composite coating, which has good compactness and bonding strength. Compared with the traditional nickel-chromium-chromium carbide (Cr 3 C 2 ‑NiCr) coating, which has significantly improved high-temperature oxidation resistance and wear resistance, and can be applied to the repair and strengthening of fluidized bed burners, nozzles, boiler components, pipelines and other components.

Description

technical field [0001] The invention relates to a chromium carbide cermet composite powder, a coating and a preparation method thereof, in particular to an oxidation-resistant, wear-resistant and erosion-resistant chromium carbide cermet composite coating and a preparation method thereof. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Fluidized bed burners, nozzles, boiler components, piping, etc. are mainly used in petrochemical, aerospace, power generation, metallurgy and other industries. Under high temperature conditions, these components will suffer from severe oxidation without proper surface coating . In order to repair damaged parts and prolong the service life ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C29/06C23C4/02C23C4/06C23C4/129B22F9/04
CPCC22C29/067C23C4/129C23C4/06C23C4/02B22F9/04B22F2009/043
Inventor 李方义杜际雨李燕乐鹿海洋戚小霞冉学举张兴艺
Owner SHANDONG UNIV