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Preparation method of porous wear-resistant thermal spraying ceramic coating

A ceramic coating and thermal spraying technology, applied in the field of wear-resistant coating, can solve the problem of workpiece wear resistance and the surface lubrication of workpiece cannot meet working conditions, etc., to increase comprehensive mechanical properties, prolong lubrication time, and enhance lubrication and wear resistance. effect of action

Inactive Publication Date: 2019-03-08
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the wear resistance of the workpiece and the surface lubrication of the workpiece still cannot meet the working conditions.

Method used

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  • Preparation method of porous wear-resistant thermal spraying ceramic coating
  • Preparation method of porous wear-resistant thermal spraying ceramic coating
  • Preparation method of porous wear-resistant thermal spraying ceramic coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: a kind of preparation method of porous wear-resistant thermal spray ceramic coating, concrete steps are as follows:

[0020] (1) Grinding, cleaning (ultrasonic cleaning), and sandblasting the metal substrate (45# steel) to make the surface roughness of the metal substrate reach Ra>16;

[0021] (2) Prepare the bonding layer Ni-Co-Cr-Al-Y alloy powder, in terms of mass fraction, wherein the bonding layer Ni-Co-Cr-Al-Y alloy powder contains Co 0.01%, Cr 0.01%, Y 0.01%, Al 7%, the rest is Ni; use plasma spraying method to spray the bonding layer Ni-Co-Cr-Al-Y alloy to the bonding layer Ni-Co-Cr-Al on the metal substrate treated in step (1) The thickness of the -Y alloy layer is 70 μm to obtain the metal base / bonding layer Ni-Co-Cr-Al-Y alloy; wherein the spraying current of the plasma spraying method is 500A, N 2 The rate is 2100mL / h, the spraying distance is 70mm, the powder feeding voltage is 8V, and the preheating temperature of the metal substrate to be s...

Embodiment 2

[0029] Embodiment 2: a kind of preparation method of porous wear-resistant thermal spray ceramic coating, concrete steps are as follows:

[0030] (1) The metal substrate (cobalt-based alloy K640) is pre-treated by grinding, cleaning (ultrasonic cleaning), and sandblasting to make the surface roughness of the metal substrate reach Ra>16;

[0031] (2) Prepare the Ni-Co-Cr-Al-Y alloy powder for the bonding layer, in terms of mass fraction, wherein the Ni-Co-Cr-Al-Y alloy powder for the bonding layer contains 10% Co, 24% Cr, Y 2%, Al 12%, and the rest is Ni; use plasma spraying method to spray the bonding layer Ni-Co-Cr-Al-Y alloy to the bonding layer Ni-Co-Cr-Al on the metal substrate treated in step (1) The thickness of the -Y alloy layer is 100 μm to obtain the metal base / bonding layer Ni-Co-Cr-Al-Y alloy; wherein the spraying current of the plasma spraying method is 550A, N 2The rate is 2400mL / h, the spraying distance is 100mm, the powder feeding voltage is 10V, and the prehe...

Embodiment 3

[0039] Embodiment 3: a kind of preparation method of porous wear-resistant thermal spray ceramic coating, concrete steps are as follows:

[0040] (1) The metal substrate (nickel-based alloy In800) is pre-treated by grinding, cleaning (ultrasonic cleaning), and sandblasting to make the surface roughness of the metal substrate reach Ra>16;

[0041] (2) Prepare the bonding layer Ni-Co-Cr-Al-Y alloy powder, in terms of mass fraction, wherein the bonding layer Ni-Co-Cr-Al-Y alloy powder contains Co 5%, Cr 12%, Y 1%, Al 10%, the rest is Ni; use plasma spraying method to spray the bonding layer Ni-Co-Cr-Al-Y alloy to the bonding layer Ni-Co-Cr-Al on the metal substrate treated in step (1) The thickness of the -Y alloy layer is 85 μm to obtain the metal base / bonding layer Ni-Co-Cr-Al-Y alloy; wherein the spraying current of the plasma spraying method is 520A, N 2 The rate is 2250mL / h, the spraying distance is 85mm, the powder feeding voltage is 9V, and the preheating temperature of t...

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Abstract

The invention discloses a preparation method of a porous wear-resistant thermal spraying ceramic coating, and belongs to the technical field of wear-resistant coating materials. The preparation methodcomprises the steps that a bonding layer Ni-Co-Cr-Al-Y alloy with the thickness of 70-100 microns is sprayed on a pretreated metal substrate by adopting a plasma spraying method, and then a plasma spraying method is adopted to spray a wear-resistant ceramic layer on the surface of the bonding layer Ni-Co-Cr-Al-Y alloy, wherein the bonding layer Ni-Co-Cr-Al-Y alloy comprises, by mass, 0.01-10% ofCo, 0.01-24% of Cr, 0.01-2% of Y, 7-12% of Al and the balance Ni. According to the preparation method, the microstructure of the coating is changed, and specially wear-resistant ceramic coating sheetsor blocks is converted into particles, and micro-holes are formed in the ceramic layer; and the abrasive resistance of the coating can be enhanced by the particles of the hard phase in the ceramic layer, the micro-holes facilities the storage of a lubricating liquid, the lubricating time of a workpiece is prolonged, moreover, a residual hole-forming lubricant in the granular ceramic layer can beself-lubricated, then the lubricating effect of the coating is enhanced, the lubricating and wear-resisting effects of the wear-resistant coating can be greatly enhanced, the comprehensive mechanicalproperty of the coating is improved, and the service life of the coating is prolonged.

Description

technical field [0001] The invention relates to a preparation method of a porous wear-resistant thermal spray ceramic coating, which belongs to the technical field of wear-resistant coatings. Background technique [0002] Surface friction and wear is one of the most common surface failure modes. In order to achieve the purpose of reducing surface wear, lubricating the relative friction interface is a common means for people and industrial applications. Friction is the primary cause of energy consumption, affecting energy conversion efficiency, and loss of friction interface materials. Therefore, lubrication is an important and effective means to solve friction and wear problems. Due to the economic and energy losses caused by friction and wear, it is necessary to study key technologies that are superior to traditional lubrication for friction reduction and loss reduction to solve the problems caused by surface friction and wear. [0003] At present, in the field of wear-res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/073C23C4/134C23C4/11C23C4/10
CPCC23C4/073C23C4/10C23C4/11C23C4/134
Inventor 宋鹏李青黄太红陆建生
Owner KUNMING UNIV OF SCI & TECH
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