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Method for preparing thermally sprayed ceramic coating of plunger of high-pressure cleaning machine

A high-pressure cleaning machine, ceramic coating technology, applied in the direction of coating, metal material coating process, melt spraying, etc., can solve the problems of wear resistance, corrosion resistance and low friction coefficient, and achieve low surface friction coefficient and corrosion resistance. The effect of good performance and high hardness

Inactive Publication Date: 2011-10-12
德清县武康镇创智热喷涂厂(普通合伙)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the problem of wear-resistant sealing of the plunger of a high-pressure cleaner under high water pressure, and provides a method for preparing a thermal-sprayed ceramic coating on a plunger of a high-pressure cleaner. The plunger coating has high wear resistance, Corrosion resistance, low friction coefficient characteristics

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The preparation method of the thermal spraying ceramic coating on the plunger of a high-pressure cleaning machine comprises the following steps:

[0017] ①Cut down the coating area of ​​the plunger base, reserve a thickness of 0.15mm, and cut the edge of the coating area and the non-coating area at a 45-degree chamfer; The thickness of mm is used for coating, and when cutting, the connection between the edge of the coating area and the non-coating area is cut at a 45-degree chamfer. Because we found that when cutting down, for the convenience of processing, it is directly cut at 90 degrees vertically, but the combination of the coating area and the non-coating area of ​​the plunger made in this way is not good, and the coating is easy to be on the edge. Wear and tear, after the edge is cut into a 45-degree chamfer, there is a buffer transition state between the coating and the non-coating, so that the bonding between the two different materials is better;

[0018] ② De...

Embodiment 2

[0025] The preparation method of the thermal spraying ceramic coating on the plunger of a high-pressure cleaning machine comprises the following steps:

[0026] ① Cut down the coating area of ​​the plunger base to reserve a thickness of 0.25 mm, and cut the edge of the coating area and the connection part of the non-coating area to a 45-degree chamfer;

[0027] ②Degrease the plunger base with an organic solvent, then bake it, and blast it with brown corundum sand. The blasting pressure is 5kg, the blasting distance is 15cm, the blasting angle is 80°, and the non-coating area is protected by a fixture;

[0028] ③Preheat the plunger base to 100°C, and spray a layer of nickel-aluminum self-adhesive powder with a thickness of 0.03-0.05mm;

[0029] ④ Use plasma spraying ceramic coating, spraying current 600-700A, spraying voltage 70-80V, feeding rate 40-60g / min, coating thickness 0.4mm;

[0030] ⑤ Use microcrystalline paraffin sealing agent to seal the coating, and the sealing tem...

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Abstract

The invention discloses a method for preparing a thermally sprayed ceramic coating of a plunger of a high-pressure cleaning machine. A used plasma sprayed ceramic coating has the characteristics of high hardness, high chemical inertness and good high-temperature resistance. The hardness of the coating cannot be reduced below 540 degrees centigrade; due to low surface friction coefficient, the coating has a function of reducing friction of a friction pair; and due to good corrosion resistance, the coating can be applicable in various types of corrosive conditions and is especially applicable to being used in the plunger of the high-pressure cleaning machine.

Description

technical field [0001] The invention relates to a preparation method of a ceramic coating, in particular to a preparation method of a high-pressure cleaner plunger ceramic coating. Background technique [0002] At present, in order to adapt to the working environment of high pressure and high wear resistance, the plunger of the high pressure cleaner is generally heat treated or plated with hard chrome, but the effect is not ideal. Main reasons: 1. Insufficient wear resistance. Under the condition of high pressure and high speed friction, relatively large friction heat will be generated on the surface of the plunger, and the surface temperature will rise to above 300°C. The surface hardness of heat treatment or hard chrome plating will decrease rapidly, and the wear resistance will decline rapidly. 2. Corrosion resistance is not ideal. The liquid material delivered by the pump usually contains some acidic or alkaline chemical corrosion substances, which will cause long-term...

Claims

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Application Information

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IPC IPC(8): C23C4/10C23C4/02C23C4/134C23C4/18
Inventor 陈峰沈健健
Owner 德清县武康镇创智热喷涂厂(普通合伙)
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