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Aluminum matrix composite material with ultra-low friction coefficient and preparation method thereof

An ultra-low friction, aluminum-based material technology, applied in anodizing and other directions, can solve the problems of complex process, high preparation cost, low friction and wear performance, etc., and achieve the effect of simple process, low cost and easy repair

Inactive Publication Date: 2014-10-15
ADVANCED TECHNOLOGY & MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to propose an aluminum-based composite material with an ultra-low coefficient of friction, aiming at the problems of low friction and wear performance, high preparation cost and complicated process existing in the above-mentioned self-lubricating materials and surface modification technology. Advantages of the service life of key parts of the material

Method used

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  • Aluminum matrix composite material with ultra-low friction coefficient and preparation method thereof
  • Aluminum matrix composite material with ultra-low friction coefficient and preparation method thereof
  • Aluminum matrix composite material with ultra-low friction coefficient and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1.1 Microarc Oxidation to Al 2 O 3 hardened film

[0035] Sample material: superhard aluminum alloy 7A04 (original brand LC4);

[0036] Micro-arc oxidation conditions:

[0037] Working temperature from room temperature to 35°C

[0038] Solution formulation Na 2 SiO 3 :H 2 O weight ratio 0.3:100

[0039] KOH:Na 2 SiO 3 Weight ratio 25:100

[0040] Voltage AC positive pulse voltage is 540V, negative pulse voltage is 150V

[0041] The current density is 15~35A / dm 2

[0042] Time 2.5 hours

[0043] Implementation results:

[0044] Al 2 o 3 The total thickness of the hardened film layer is 170um

[0045] 1.2 MAO Al 2 O 3 Grinding and cleaning of the hardened film

[0046] Sample material: Al produced by micro-arc oxidation of superhard aluminum alloy 7AO4 2 o 3 hardened film

[0047] Grinding condition: use 200 # Water sanding paper, sand evenly until black Al appears 2 o 3 Ultrasonic cleaning conditions of hardened film layer: ...

Embodiment 2

[0074] 2.1 Microarc Oxidation to Al 2 O 3 hardened film

[0075] Sample material: superhard aluminum alloy 7A52 (original brand LC52);

[0076] Micro-arc oxidation conditions:

[0077] Working temperature from room temperature to 35°C

[0078] Solution formulation Na 2 SiO 3 :H 2 O weight ratio 0.3:100

[0079] KOH:Na 2 SiO 3 Weight ratio 25:100

[0080] Voltage AC positive pulse voltage is 540V, negative pulse voltage is 130V

[0081] The current density is 15~35A / dm 2

[0082] Time 1.8 hours

[0083] Implementation results:

[0084] Al 2 o 3 The total thickness of the hardened film layer is 110um

[0085] 2.2 MAO Al 2 O 3 Grinding and cleaning of the hardened film

[0086] Sample material: Al produced by micro-arc oxidation of superhard aluminum alloy 7A52 2 o 3 hardened film

[0087] Grinding condition: use 200 # Water sanding paper, sand evenly until black Al appears 2 o 3 Ultrasonic cleaning conditions of hardened film layer: ...

Embodiment 3

[0113] 3.1 Microarc Oxidation to Al 2 O 3 hardened film

[0114] Sample material: hard aluminum alloy 2A12 (original grade LY12);

[0115] Micro-arc oxidation conditions:

[0116] Working temperature from room temperature to 35°C

[0117] Solution formulation Na 2 SiO 3 :H 2 O weight ratio 0.5:100

[0118] KOH:Na 2 SiO 3 Weight ratio 25:100

[0119] Voltage AC positive pulse voltage is 640V, negative pulse voltage is 140V

[0120] The current density is 15~35A / dm 2

[0121] time 6 hours

[0122] Implementation results:

[0123] al 2 o 3 The total thickness of the hardened film layer is 250um

[0124] 3.2 MAO Al 2 O 3 Grinding and cleaning of the hardened film

[0125] Sample material: Al produced by micro-arc oxidation of hard aluminum alloy 2A12 2 o 3 hardened film

[0126] Grinding condition: use 100 # and 500 # Water sanding paper, sand evenly until black Al appears 2 o 3 Ultrasonic cleaning conditions of hardened film layer: ...

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Abstract

The invention discloses an aluminum-based composite material with an ultra-low friction coefficient and a preparation method thereof. The aluminum-based composite material with the ultra-low friction coefficient comprises an aluminum substrate, an Al2O3 hardened film layer produced by microarc oxidation on the surface of the aluminum substrate, and a MoS2-based dry film lubricating layer sprayed on the surface of the Al2O3 hardened film layer. The aluminum-based composite material has the advantages of overcoming a plurality of shortcomings of the prior art and prolonging the service life of key components and parts adopting the composite material, along with scientific formula, simple process and ultra-low friction coefficient.

Description

technical field [0001] The invention relates to an aluminum-based composite material and a preparation method thereof, in particular to an aluminum-based composite material with an ultra-low friction coefficient and a preparation method thereof. Background technique [0002] Lightweight and high-strength materials such as aluminum alloys, magnesium alloys, and titanium alloys have been widely used in aerospace, automotive, and mechanical equipment industries. For mechanical parts that require ultra-low friction coefficient, dry friction, and light weight, the friction and wear performance is the main reason that affects the service life of aluminum-based materials. At present, the main ways to reduce the friction coefficient and wear amount of aluminum-based parts are: 1. Select aluminum-based self-lubricating materials; 2. Surface hardening treatment of aluminum-based materials; 3. Improve the dry friction and lubrication of friction pairs. [0003] 1. Self-lubricating mat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/04C25D11/18
Inventor 闫来成谭华玉罗锡裕金成海
Owner ADVANCED TECHNOLOGY & MATERIALS CO LTD
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