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Preparation method for wear-resistant thermally-sprayed composite copper-aluminum alloy coating and coating material

A copper-aluminum alloy and thermal spraying technology, which is applied in metal material coating process, coating, fusion spraying, etc., can solve the problem that alloy powder particles cannot be fully melted, cannot reach high-aluminum bronze, and have poor metallurgical bonding properties, etc. question

Active Publication Date: 2014-12-24
GUANGDONG AURICAN HARDWARE TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Traditional thermal spraying high-aluminum bronze coatings are sprayed with copper-aluminum alloy powder. During the spraying process, the aluminum content in the powder will be reduced due to burning and oxidation, resulting in insufficient hardened phase in the alloy coating and a decrease in hardness. Wear resistance is relatively poor
The alloy powder particles cannot be fully melted, the metallurgical bonding performance between the particles is also poor, and the structure and properties are not uniform
In addition, most thermal sprayed high-aluminum bronze alloy coatings do not undergo subsequent treatment after spraying, and do not maximize the role of complex aluminum bronze through phase transformation precipitation to strengthen the coating, so the hardness of the coating is not high, and the wear resistance is not enough. It is far from the performance of bulk high-alumina bronze with the same composition

Method used

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  • Preparation method for wear-resistant thermally-sprayed composite copper-aluminum alloy coating and coating material
  • Preparation method for wear-resistant thermally-sprayed composite copper-aluminum alloy coating and coating material

Examples

Experimental program
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Effect test

Embodiment 1

[0021] (1) Prepare thermal spraying mixed powder according to the following mass percentage components (the content of each element is its content in the entire thermal spraying mixed powder): first accurately weigh the copper-aluminum alloy powder, wherein the copper content is 85% , the aluminum content is 9%, then add self-fluxing alloy powder containing 4.3% nickel, 0.5% chromium, 0.5% iron, 0.3% boron, 0.2% silicon and 0.2% carbon, and then grind the mixed powder evenly with a ball mill, Control the average particle size of the powder to be 15-35 μm before use.

[0022] (2) Use a 45 steel sample with a specification of 60×18×5mm as the base workpiece, and perform sandblasting on its surface to roughen the surface of the workpiece.

[0023] (3) Perform flame preheating on the surface of the workpiece, and the preheating temperature is controlled at 250-300°C;

[0024] (4) Flame spray the pre-spray primer on the surface of the workpiece. The pre-spray primer powder is comm...

Embodiment 2

[0029] (1) Prepare the thermal spraying mixed powder according to the following mass percentage components (the content of each element is its content in the whole thermal spraying mixed powder): first accurately weigh the copper-aluminum alloy powder, wherein the copper content is 80 %, the aluminum content is 14%, then add self-fluxing alloy powder containing 3.8% nickel, 1.5% chromium, 0.5% iron, 0.1% boron, 0.05% silicon and 0.05% carbon, and then grind the mixed powder evenly with a ball mill , Control the average particle size of the powder to be 15-35 μm before use.

[0030] (2) Use high-carbon high-chromium steel with a specification of Φ120×35mm as the base workpiece, and perform sandblasting on its surface to roughen the surface of the workpiece.

[0031] (3) Perform flame preheating on the surface of the workpiece, and the preheating temperature is controlled at 250-300°C;

[0032] (4) Flame spray the pre-spray primer on the surface of the workpiece. The pre-spray ...

Embodiment 3

[0036] (1) Prepare the thermal spraying mixed powder according to the following mass percentage components (the content of each element is its content in the whole thermal spraying mixed powder): first accurately weigh the copper-aluminum alloy powder, wherein the copper content is 82 %, the aluminum content is 10%, then add self-fluxing alloy powder containing 4% nickel, 0.5% chromium, 1.5% iron, 1% boron, 0.5% silicon and 0.5% carbon, and then grind the mixed powder evenly with a ball mill , Control the average particle size of the powder to be 15-35 μm before use.

[0037] (2) Use a 45 steel sample with a specification of 60×18×5mm as the base workpiece, and perform sandblasting on its surface to roughen the surface of the workpiece.

[0038] (3) Perform flame preheating on the surface of the workpiece, and the preheating temperature is controlled at 250-300°C;

[0039] (4) Flame spray the pre-spray primer on the surface of the workpiece. The pre-spray primer powder is com...

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Abstract

The invention discloses a preparation method for a wear-resistant thermally-sprayed composite copper-aluminum alloy coating and a coating material. The preparation method sequentially comprises the following steps: (1) uniformly mixing copper-aluminum alloy powder and self-fusible alloy powder to prepare thermal spraying mixed powder, wherein the mixed powder comprises the following elements in percentage by weight: 80-85% of copper, 9-14% of aluminum, 3.8-4.3% of nickel, 0.5-1.5% of chromium, 0.5-1.5% of iron, 0-2% of boron, 0-2% of silicon and 0-2% of carbon; (2) treating the surface of a workpiece; (3) preheating the workpiece at 250-300 DEG C; (4) thermally spraying a priming coat on the surface of the workpiece; (5) thermally spraying the thermal spraying mixed powder obtained in the step (1) on the surface of the priming coat; (6) remelting, cooling, preserving heat at 350-550 DEG C for 1-2 hours, and cooling to obtain the coating. The coating has relatively high wear resistance and hardness.

Description

technical field [0001] The invention relates to the field of surface technology, in particular to a preparation method and coating material of a wear-resistant thermal spraying composite copper-aluminum alloy coating. Background technique [0002] Traditional thermal spraying high-aluminum bronze coatings are sprayed with copper-aluminum alloy powder. During the spraying process, the aluminum content in the powder will be reduced due to burning and oxidation, resulting in insufficient hardened phase in the alloy coating and a decrease in hardness. Wear resistance is relatively poor. The alloy powder particles cannot be fully melted, the metallurgical bonding performance between the particles is also poor, and the structure and properties are not uniform. In addition, most thermal sprayed high-aluminum bronze alloy coatings do not undergo subsequent treatment after spraying, and do not maximize the role of complex aluminum bronze through phase transformation precipitation to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/12C23C4/06C22C9/01
Inventor 陈大川曾鹏谢光荣
Owner GUANGDONG AURICAN HARDWARE TECH CO LTD
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