Cu-Ti2SnC self-lubricating conductive coating and preparation method thereof

A technology of tin carbide and titanium, conductive coating, applied in the direction of coating, metal material coating process, fusion spraying, etc., can solve the problem that it is difficult to meet the requirements and limitations of sliding electrical contact performance, pure copper room temperature strength and high temperature strength and hardness Insufficient and other problems, to achieve the effect of less oxide content and unmelted particles, low porosity, and good processing performance

Active Publication Date: 2015-07-29
盐城东方汽车广场投资发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the room temperature strength, high temperature strength and hardness of pure copper are insufficient, which limits its practical application.
At present, copper alloy materials for sliding electrical contact materials are mainly copper-silver alloys, copper-tin alloys, copper-zinc alloys, and copper-chromium-zirconium alloys. high performance requirements

Method used

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  • Cu-Ti2SnC self-lubricating conductive coating and preparation method thereof
  • Cu-Ti2SnC self-lubricating conductive coating and preparation method thereof
  • Cu-Ti2SnC self-lubricating conductive coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Tin carbide titanium powder is selected as the base material, high-purity copper sulfate is used as the main salt, high-purity zinc powder is used as the reducing agent, and soft water is used as the solvent. Copper-coated carbonization is obtained by plating copper on the surface of tin carbide titanium particles by chemical replacement. Tin titanium powder material.

[0035] Pure copper powder (average particle size 50μm) and copper-coated tin carbide titanium powder (average particle size 30μm) are mass Cu:Ti 2 SnC=90:10 batching and wet grinding mixing in absolute ethanol medium. The grinding medium is agate ball, the ball milling speed is 120r / min, and the mixing time is 30h;

[0036] The powder obtained after ball milling is mixed with polyvinyl alcohol solution (PVA) as a binder, and then granulated by agglomeration method, and sieved to obtain a powder that meets the spraying requirements. The average particle size of the selected powder is 75 μm;

[0037] CH...

Embodiment 2

[0044] Prepare copper-coated tin carbide titanium powder (average particle size 50 μm, the preparation method is the same as Example 1). Pure copper powder (average particle size 25μm) and copper-coated tin carbide titanium powder are mass Cu:Ti 2 SnC = 80:20 ingredients were wet milled in absolute ethanol medium. The grinding medium is agate ball, the ball milling speed is 100r / min, and the mixing time is 36h;

[0045] The powder obtained after ball milling is mixed with polyvinyl alcohol solution (PVA) as a binder, and then granulated by agglomeration method, and sieved to obtain a powder that meets the spraying requirements. The average particle size of the selected powder is 50 μm;

[0046] CH-2000 HVOF spraying equipment is used for spraying, propane is used as fuel gas, high-pressure oxygen is used as combustion-supporting gas, and nitrogen is used as powder delivery gas. When spraying, the propane pressure is 0.60MPa, the oxygen pressure is 0.68MPa, and the nitrogen ...

Embodiment 3

[0052] Prepare copper-coated tin carbide titanium powder (average particle size 80 μm, the preparation method is the same as Example 1). Pure copper powder (average particle size 10μm) and copper-coated tin carbide titanium powder are mass Cu:Ti 2 SnC=70:30 ingredients were mixed with wet milling in absolute ethanol medium. The grinding medium is agate ball, the ball milling speed is 150r / min, and the mixing time is 36h;

[0053] The powder obtained after ball milling is mixed with polyvinyl alcohol solution (PVA) as a binder, and then granulated by agglomeration method, and sieved to obtain a powder that meets the spraying requirements. The average particle size of the selected powder is 100 μm;

[0054] CH-2000 HVOF spraying equipment is used for spraying, propane is used as fuel gas, high-pressure oxygen is used as combustion-supporting gas, and nitrogen is used as powder delivery gas. When spraying, the propane pressure is 0.60MPa, the oxygen pressure is 0.68MPa, and th...

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Abstract

The invention discloses a Cu-Ti2SnC self-lubricating conductive coating and a preparation method thereof. The mass ratio of raw materials of the coating is as follow: Cu:Ti2SnC=(65-97):(3-35); the mass ratio of components of the formed coating is as follow: Cu:Ti2SnC:the balance=(65-97):(2-30):(1-5); the balance consists of Cu2O as well as decomposition products TiC and Sn of the Ti2SnC, wherein the mass ratio of the TiC and Sn is 1: (1.5-2), and the Cu2O is 1-3% of the mass of the formed coating. Through spraying by a high velocity oxy-fuel technology, good wear-resisting, self-lubricating and electrical properties are achieved, the Cu-based strength and the wear resistance are improved, and meanwhile the high conductivity is maintained.

Description

technical field [0001] The invention belongs to the technical field of electric sliding material protection, in particular to a copper-tin carbide titanium self-lubricating conductive coating and a preparation method thereof. Background technique [0002] As a common material for sliding electrical contacts, copper has high electrical and thermal conductivity and excellent process performance. However, the room temperature strength, high temperature strength and hardness of pure copper are insufficient, which limits its practical application. At present, copper alloy materials for sliding electrical contact materials are mainly copper-silver alloys, copper-tin alloys, copper-zinc alloys, and copper-chromium-zirconium alloys. high performance requirements. How to further develop copper-based electric sliding materials with high electrical conductivity and mechanical properties, and should also have excellent wear resistance and high softening resistance, and methods and tec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/00C22C32/00C23C4/12C23C4/06
Inventor 陈志浩朱协彬姚敏
Owner 盐城东方汽车广场投资发展有限公司
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