WC-Cr3C2-Ni thermal spraying powder, and preparation method and applications thereof

A technology of thermal spraying powder, wc-cr3c2-ni, applied in the field of thermal spraying powder preparation and thermal spraying, can solve the problem of thermal spraying powder needing to be improved, etc., and achieve the effect of low oxygen content, low cost and good penetration

Active Publication Date: 2013-08-28
GANZHOU ACHTECK TOOL TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the current WC-Cr 3 C 2 -N

Method used

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  • WC-Cr3C2-Ni thermal spraying powder, and preparation method and applications thereof
  • WC-Cr3C2-Ni thermal spraying powder, and preparation method and applications thereof
  • WC-Cr3C2-Ni thermal spraying powder, and preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0049] Example 1

[0050] In this embodiment, referring to the above general method, taking the production of 100kg spray powder as an example, the WC-Cr of the present invention is prepared according to the following process steps 3 C 2 -Ni thermal spray powder:

[0051] Among them, the raw material ratio and its 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 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 steady-flow air permeation method, that is, the specific surface area and average particle size are measured under the condition of constant air flow...

Example Embodiment

[0089] Example 2

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

[0091]

[0092] Then, combined with the naked eye observation and the performance test after spraying the prepared coating, the new WC-Cr prepared above was tested and evaluated 3 C 2 -The performance of Ni thermal spray powder. Am...

Example Embodiment

[0114] Example 3

[0115] Taking the production of 100kg spray powder as an example, the WC-Cr of the present invention was prepared according to the method described in Example 1. 3 C 2 -Ni thermal spray powder, which differs from Example 1 in that it has the raw material ratio and corresponding parameters shown in the following table; adding 25% of the raw material mass percentage and the temperature of 10-15 ℃ deionized water 25kg and 1.0kg (1.0%) of polyvinyl alcohol; the boat pushing speed is 12 minutes / boat, and the sintering temperature is 1280℃. Thus, the final product WC-Cr is prepared 3 C 2 -Ni thermal spray powder, the particle size is 35kg with 10-38 microns and 63kg with 15-53 microns, the metal loss is about 2kg (2.0%) during the production process, and the powder's bulk density is 4.4-4.6g / cm 3 .

[0116]

[0117] Then, combined with the naked eye observation and the performance test after spraying the prepared coating, the new WC-Cr prepared above was tested and eva...

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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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IPC IPC(8): C23C4/10C22C29/08C22C1/05C23C4/06
Inventor 张立涛陈邦明黄文峰李声燕
Owner GANZHOU ACHTECK TOOL TECH
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