Wc-cr3c2-ni thermal spray powder and its preparation method and use

A technology of wc-cr3c2-ni and thermal spraying powder, which is applied in coating, fusion spraying, metal material coating process, etc., can solve problems such as brittleness, cavitation performance limitation, thermal spraying powder needs to be improved, and achieve improvement Correlation performance, low oxygen content, low cost effect

Active Publication Date: 2016-01-20
GANZHOU ACHTECK TOOL TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially spraying WC-Cr 3 C 2 -Ni, its high temperature oxidation resistance, wear resistance, corrosion resistance and other aspects have very good performance, especially good corrosion resistance, can be widely used in corrosion-resistant workpieces in coastal areas or island countries, but its brittleness , cavitation performance limits their application
[0004] Therefore, the current WC-Cr 3 C 2 -Ni thermal spray powder still needs improvement

Method used

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  • Wc-cr3c2-ni thermal spray powder and its preparation method and use
  • Wc-cr3c2-ni thermal spray powder and its preparation method and use
  • Wc-cr3c2-ni thermal spray powder and its preparation method and use

Examples

Experimental program
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Effect test

Embodiment 1

[0050] This embodiment refers to the above-mentioned general method, taking the production of 100kg spray powder as an example, and preparing the WC-Cr of the present invention according to the following process steps 3 C 2 -Ni Thermal Spray Powder:

[0051] Among them, the ratio of raw materials and corresponding parameters are shown in the table below.

[0052]

[0053] Note: BET: refers to the BET test method, that is, the BET specific surface area test method, where the specific surface area refers to the total area of ​​a unit mass of material. In the above table, the BET value measured by the BET test method is used to characterize the particle size of the nano-tungsten carbide with spherical porous structure used in the present invention.

[0054] FSSS: The abbreviation of Fischer particle size test, the basic method is the steady flow air permeation method, that is, the specific surface area and average particle size are measured under the condition of constant ai...

Embodiment 2

[0090] Taking the production of 100kg spray powder as an example, prepare the WC-Cr of the present invention according to the method described in Example 1 3 C 2 -Ni thermal spray powder, wherein, the difference from Example 1 is: have the raw material ratio and corresponding parameters shown in the following table; add deionized water that accounts for 25% of the raw material mass percentage and a temperature of 10-15 ° C 25kg and 1.0kg (1.0%) of polyvinyl alcohol; the sintering temperature is 1270°C. Thus, the preparation obtains the final product WC-Cr 3 C 2 -Ni thermal spraying powder, wherein the particle size specification is 40kg of 5-30 microns, 58kg of 15-45 microns, the metal loss is about 2kg (2.0%) during the production process, and the bulk density of the powder is 4.2-4.4g / cm 3 .

[0091]

[0092] Then, combined with the visual observation and the performance test after the coating was prepared by spraying, the new WC-Cr prepared above was tested and evalu...

Embodiment 3

[0115] Taking the production of 100kg spray powder as an example, prepare the WC-Cr of the present invention according to the method described in Example 1 3 C 2 -Ni thermal spray powder, wherein, the difference from Example 1 is: have the raw material ratio and corresponding parameters shown in the following table; add deionized water that accounts for 25% of the raw material mass percentage and a temperature of 10-15 ° C 25kg and 1.0kg (1.0%) of polyvinyl alcohol; the speed of pushing the boat is 12 minutes / boat, and the sintering temperature is 1280°C. Thus, the preparation obtains the final product WC-Cr 3 C 2 -Ni thermal spraying powder, of which the particle size specification is 35kg of 10-38 microns, 63kg of 15-53 microns, the metal loss is about 2kg (2.0%) during the production process, and the bulk density of the powder is 4.4-4.6g / cm 3 .

[0116]

[0117] Then, combined with the visual observation and the performance test after the coating was prepared by spr...

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Abstract

The invention discloses a WC-Cr3C2-Ni thermal spraying powder, and a preparation method and applications thereof Wherein, the WC-Cr3C2-Ni thermal spraying powder comprises: 72.5 parts by weight of tungsten carbide mixture; 20.5 parts by weight of chromium carbide; 7.0 parts by weight of nickel; 0.5 parts by weight of titanium carbide; and 0.3 parts by weight of organic anti-oxidant; wherein the tungsten carbide mixture comprises: 5-26.5 parts by weight of tungsten carbide with granularity being 0.05-0.2mum; 10-30 parts by weight of tungsten carbide with granularity being 1.5-2.5mum; and 12.5-57.5 parts by weight of tungsten carbide with granularity being 4.0-9.0mum. The WC-Cr3C2-Ni thermal spraying powder can improve relative performances of coating after thermal spraying, can not only make sure the coating to have excellent wear resistance, high temperature antioxidation performance and cavitation erosion resistance, but also obtains good coating toughness, and has wide application range.

Description

technical field [0001] The invention relates to the technical field of thermal spraying, in particular to the technical field of thermal spraying powder preparation. Specifically, the present invention relates to WC-Cr 3 C 2 -Ni thermal spraying powder and its preparation method and use. Background technique [0002] Thermal spraying technology is a key technology in the field of surface modification. By preparing a layer of wear-resistant coating on the surface of the processed workpiece, the workpiece can obtain excellent performance. Among the numerous carbides, tungsten carbide and chromium carbide are used industrially as thermal spraying materials. Tungsten carbide and chromium carbide have the characteristics of high temperature and oxidation resistance, high strength, high hardness and good corrosion resistance of ceramic materials, and are widely used in aerospace, metallurgy, machinery and other fields. Compared with electroplating hard chromium layer, thermal ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C4/06C22C29/08C22C1/05
Inventor 张立涛陈邦明黄文峰李声燕
Owner GANZHOU ACHTECK TOOL TECH
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