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Preparation method of graded composite wear-resistant coating

A wear-resistant coating and gradient technology, applied in the field of materials, to achieve the effect of strong and reliable coating, strong binding force, and wear-resistant combination

Inactive Publication Date: 2017-04-05
WUXI MINGSHENG TEXTILE MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The key to the success of thermal spraying composite wear-resistant coating lies in the wear resistance. However, the properties of the sprayed material and the coating are very different. Therefore, the material can only be selected according to the existing properties of the sprayed material. As for the wear-resistant coating Abrasion resistance requires a large number of performance tests to verify

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] An impeller or casing WC-Si of a slurry pump 3 N 4 -The preparation method of NiCrAl gradient composite wear-resistant coating, it comprises:

[0029] (1) The surface of the base material is subjected to sandblasting and roughening treatment;

[0030] (2) washing the substrate surface with acetone and ethanol respectively, and drying at 100-160°C;

[0031] (3) Using atmospheric plasma spraying equipment, plasma spray NiCrAl transition layer on the surface of the substrate, the thickness of the transition layer is 0.1mm;

[0032] (4) Atmospheric plasma spraying WC-Si on the transition layer 3 N 4 -NiCrAl mixed powder in a ratio of 1:0.5:2 to get WC-Si 3 N 4 -NiCrAl gradient composite wear-resistant coating, the thickness of the gradient composite wear-resistant coating is 0.2mm.

Embodiment 2

[0034] An impeller or casing WC-Si of a slurry pump 3 N 4 -The preparation method of NiCrAl gradient composite wear-resistant coating, it comprises:

[0035] (1) The surface of the base material is subjected to sandblasting and roughening treatment;

[0036] (2) washing the substrate surface with acetone and ethanol respectively, and drying at 100-160°C;

[0037] (3) Using atmospheric plasma spraying equipment, the surface of the substrate is plasma sprayed with a NiCrAl transition layer, and the thickness of the transition layer is 0.3mm;

[0038] (4) Atmospheric plasma spraying WC-Si on the transition layer 3 N 4 -NiCrAl mixed powder in a ratio of 1:2:6 to get WC-Si 3 N 4 -NiCrAl gradient composite wear-resistant coating, the thickness of the gradient composite wear-resistant coating is 0.6mm.

Embodiment 3

[0040] An impeller or casing WC-Si of a slurry pump 3 N 4 -The preparation method of NiCrAl gradient composite wear-resistant coating, it comprises:

[0041] (1) The surface of the base material is subjected to sandblasting and roughening treatment;

[0042] (2) washing the substrate surface with acetone and ethanol respectively, and drying at 100-160°C;

[0043] (3) Using atmospheric plasma spraying equipment, plasma spray NiCrAl transition layer on the surface of the substrate, the thickness of the transition layer is 0.2mm;

[0044] (4) Atmospheric plasma spraying WC-Si on the transition layer 3 N 4-NiCrAl mixed powder in a ratio of 1:1:4 to get WC-Si 3 N 4 -NiCrAl gradient composite wear-resistant coating, the thickness of the gradient composite wear-resistant coating is 0.4mm.

[0045] Place the gradient composite wear-resistant coating matrix obtained in Examples 1-3 in a water-sand mixture, and carry out a rotational wear test. After 24 hours, weigh it and compar...

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Abstract

The invention discloses a preparation method of a graded composite wear-resistant coating. The preparation method includes the steps that (1) the surface of a base material is subject to sand blast roughening; (2) the surface of the base material is washed with acetone and ethyl alcohol, drying is carried out at the temperature ranging from 100 DEG C to 160 DEG C; (3) atmospheric plasma spray equipment is adopted for conducting plasma spray on the surface of the base material to form an NiCrAl transition layer, and the thickness of the transition layer ranges from 0.1 mm to 0.3 mm; and (4) atmospheric plasma spray of WC-Si3N4-NiCrAl mixing powder is carried out on the transition layer, the WC-Si3N4-NiCrAl graded composite wear-resistant coating is obtained, and the thickness of the graded composite wear-resistant coating ranges from 0.2 mm to 0.6 mm. by means of the composite coating, the wear-resisting property of the base can be improved.

Description

technical field [0001] The invention relates to the field of material technology, in particular to a WC-Si 3 N 4 -A preparation method of NiCrAl gradient composite wear-resistant coating. Background technique [0002] Wear is one of the three main causes of failure of metal parts (wear, corrosion and fatigue). The economic loss it causes is very huge, such as the figure announced by the United States in 1981, the annual loss due to wear and tear is as high as 100 billion US dollars. Among them, the material consumption is about 20 billion US dollars, which is equivalent to 7% of the annual output of materials. Due to the poor wear resistance of materials, the lost life of a large number of basic parts in my country is generally much lower than that of foreign advanced products, so the direct and indirect economic losses are also very alarming. [0003] According to the incomplete statistics of the five industrial sectors of metallurgy, mining, agricultural machinery, coa...

Claims

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Application Information

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IPC IPC(8): C23C4/134C23C4/073C23C4/06
CPCC23C4/06
Inventor 张达明
Owner WUXI MINGSHENG TEXTILE MACHINERY
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