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Novel WC-Cr3C2-Ni thermal spraying powder and preparation process thereof

A technology of wc-cr3c2-ni, thermal spraying powder, applied in metal material coating process, coating, fusion spraying and other directions, can solve problems such as limited application, achieve a wide range of applications, excellent crack toughness, high comprehensive The effect of performance advantages

Inactive Publication Date: 2012-07-18
GANZHOU ACHTECK TOOL TECH
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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, widely used in coastal areas or island countries on corrosion-resistant workpieces, but its brittleness is limited their application

Method used

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  • Novel WC-Cr3C2-Ni thermal spraying powder and preparation process thereof
  • Novel WC-Cr3C2-Ni thermal spraying powder and preparation process thereof
  • Novel WC-Cr3C2-Ni thermal spraying powder and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] To produce new WC-Cr 3 C 2 -Ni thermal spraying powder 100kg as an example, the raw material ratio and corresponding parameters are shown in Table 3, and the process is attached.

[0041] table 3

[0042]

[0043] 1. Prepare materials

[0044] Prepare nano-tungsten carbide powder according to the data in Table 3 (produced according to the patent "Preparation Method of Metal Carbide" of Inverman Corporation of the United States, patent number 2004100430580), and prepare the general-purpose medium-grained tungsten carbide product and other raw materials in the table.

[0045] 2. Mixing:

[0046] First, add 22kg (22%) nanometer tungsten carbide, 51kg (51%) medium particle tungsten carbide, 19.5kg (19.5%) chromium carbide, and 7.0kg (7.0%) nickel powder into the ball mill according to the process requirements, and then add the Raw material mass percentage is 25%, the temperature is 25kg of deionized water of 10-15 ℃ and polyvinyl alcohol of 1.0kg (1.0%) carry out mixi...

Embodiment 2

[0055] To produce new WC-Cr 3 C 2 -Ni thermal spraying powder 100kg is taken as an example, the raw material ratio and corresponding parameters are shown in Table 4, and the process is attached.

[0056] Table 4

[0057]

[0058] 1. Prepare materials

[0059] Prepare nano-tungsten carbide powder according to Table 4 (produced according to the patent of "Preparation Method of Metal Carbide" of Inverman Corporation of the United States, patent number 2004100430580), and prepare the general-purpose medium-grained tungsten carbide product and other raw materials in the table.

[0060] 2. Mixing:

[0061] First, add 36.5kg (36.5%) nanometer tungsten carbide, 36.5kg (36.5%) medium particle tungsten carbide, 19.5kg (19.5%) chromium carbide, and 7.0kg (7.0%) nickel powder into the ball mill according to the process requirements, and then Add 25kg of deionized water and 1.0kg (1.0%) of polyvinyl alcohol at a temperature of 10-15°C, accounting for 25% of the raw material mass pe...

Embodiment 3

[0070] To produce new WC-Cr 3 C 2 -Ni thermal spraying powder 100kg is taken as an example, the raw material ratio and corresponding parameters are shown in Table 5, and the process is attached.

[0071] table 5

[0072]

[0073] 1. Prepare materials

[0074] Prepare nano-tungsten carbide powder according to the data in Table 5 (produced according to the patent "Preparation Method of Metal Carbide" of Inverman Corporation of the United States, patent No. 2004100430580), and prepare the general-purpose medium-grain tungsten carbide product and other raw materials in the table.

[0075] 2. Mixing:

[0076] First, add 51kg (51%) nanometer tungsten carbide, 22kg (22%) medium particle tungsten carbide and 19.5kg (19.5%) chromium carbide into the ball mill according to the process requirements, and then add 25% of the mass percentage of raw materials at a temperature of 25kg of deionized water at 10-15°C and 1.0kg (1.0%) of polyvinyl alcohol are used for mixing. The equipmen...

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Abstract

The invention relates to novel WC-Cr3C2-Ni thermal spraying powder and a preparation process thereof. The WC-Cr3C2-Ni thermal spraying powder consists of the following raw materials in percentage by mass: 73 mass percent of tungsten carbide with two kinds of particle sizes, 19.5 mass percent of chromium carbide, 7 mass percent of nickel, and 0.5 percent of trace titanium carbide served as a grain inhibitor, wherein the tungsten carbide in the raw materials is formed by mixing the following raw materials in percentage by mass: 22 to 51 mass percent of nano tungsten carbide with 0.05 to 0.2 micrometer of particle size and 22 to 51 mass percent of medium-grain tungsten carbide with 2.0 and 8.0 micrometers of particle size in certain proportions. The invention also relates to a corresponding preparation process. According to the WC-Cr3C2-Ni thermal spraying powder and the preparation process, related performance of coatings subjected to the thermal spraying can be improved, and the coatings have high abrasive resistance, high-temperature oxidation resistance and higher toughness.

Description

technical field [0001] The invention relates to supersonic high-speed flame spraying or other thermal spraying powder technology, especially a new type of WC-Cr 3 C 2 -Ni thermal spraying powder and its preparation process. 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 spraying WC-Cr 3 C 2 -Ni coating has obvious advantages in wear ...

Claims

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Application Information

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IPC IPC(8): C23C4/06C23C4/10C09D5/46B22F9/00B22F1/00
Inventor 张永会邬海波邓邦华
Owner GANZHOU ACHTECK TOOL TECH
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