CN101314865A - Production method for hard lubricant film layer of aluminum alloy - Google Patents
Production method for hard lubricant film layer of aluminum alloy Download PDFInfo
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- CN101314865A CN101314865A CNA2007103008753A CN200710300875A CN101314865A CN 101314865 A CN101314865 A CN 101314865A CN A2007103008753 A CNA2007103008753 A CN A2007103008753A CN 200710300875 A CN200710300875 A CN 200710300875A CN 101314865 A CN101314865 A CN 101314865A
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Abstract
The invention relates to a preparation method of an aluminum-alloy rigid lubricant film layer, which comprises the steps as follows: aluminum alloy parts with oil or roll scale on the surface are pretreated for oil removing and washing; deionized water is adopted to confect electrolysing solution, which contains the components as follows: sulphuric acid is 100 to 300g/l, oxalic acid is 10 to 40g/l, supramoly is 0.1 to 10g/l, trolamine is 20 to 40ml/l, glycerin is 2 to 10ml/l, sodium lactate is 3 to 15g/l, and SDBS is 0.1 to 3g/l; the aluminum alloy parts are socked in the electrolysing solution for rigid lubricating treatment, the forward current density is 0.5 to 5A/dm<2>, the negative electrical current ranges from 0.1 to 0.5A, the positive and negative pulse duty factor ranges from 3:1 to 1:2, the temperature of the electrolysing solution ranges from 0 to 10 DEG C, and the process time of air agitation is 20 to 60 minutes. The thickness of the obtained lubricant film ranges from 30 to 80 micrometres, the hardness is Hv350 to 420, and the friction coefficient is 0.15 to 0.25; in addition, the obtained lubricant film has the advantages that the process time is short, the technology is simple, the parts do not need high-temperature heat treatment, deformation does not occur, etc., and is applied to all wrought aluminium alloys which can be processed through hard anodizing.
Description
Technical field
The present invention relates to a kind of aluminum alloy material surface coating treatment process, the particularly preparation method of aluminum alloy material surface hard lubricant film layer.
Background technology
The serious weakness of aluminum alloy materials is that matter is soft, frictional coefficient is big, easy to wear, easily pull and be difficult to and lubricate, for wear-resisting, the part that solidity to corrosion is had relatively high expectations then can't meet the demands, be specially adapted to the precision aluminium-alloy motion component of some solid lubrication occasions, can't adapt to high strength especially, corrosion resistant high request, handle by hard anodizing, its solidity to corrosion, surface hardness and wear resistance are improved significantly, but its skin friction coefficient is higher, the antithesis consistency is poor, be difficult to lubricatedly, limited aluminum alloy materials at a high speed at some, high frequency aluminium matter motion component and some are unwell to the occasion of liquid lubrication such as the valve body piece of power drive system, the disk guide rail, the application of launching device etc.Therefore, how, improve its lubricity guaranteeing further to reduce its frictional coefficient on the high basis of hard anodized film hardness, realize solid lubrication or make coating have self-lubricating property having crucial Research Significance, becoming an important directions of hardening oxidation technological improvement in recent years.The Chinese patent literature patent No.: 200510020551.5, denomination of invention: " technique for treating synergism coat of aluminium alloy material and fluorine polymer ", set forth aluminum alloy materials or component have at first been carried out hard anodizing 30～120min, introduce fluoropolymer at anodic oxidation micro-pore and surface again, also can carry out reaming to hard anodizing horizon earlier handles, introduce fluoropolymer at anodic oxidation micro-pore and surface again after the reaming, under 300～450 ℃, carry out vacuum precision thermal treatment 20～120min at last, making fluoropolymer and anodic oxidation film coalescence is one, form synergism coat, coat-thickness 20～60 μ m, hardness 400～650Hv, kinetic friction coefficient 0.15.This method need be carried out pre-treatment, hardening oxidation processing, reaming processing, fluoropolymer introducing, vacuum heat treatment etc., complex process, and the time is long, and efficient is low, and is not easy to operate, and aluminium alloy part at high temperature deforms easily.
Summary of the invention
The objective of the invention is to avoid having the defective of synergism coat of aluminium alloy material and fluorine polymer treatment technology now and the preparation method that a kind of technology is simple, easy to operate, can not cause the hard lubricant film layer of aluminum alloy of part distortion being provided.
Purpose of the present invention is achieved through the following technical solutions:
A kind of preparation method of hard lubricant film layer of aluminum alloy is characterized in that this preparation method comprises the following steps:
(1) preparation electrolytic solution, adopt deionized water preparation electrolytic solution, comprise sulfuric acid 100～300g/l, oxalic acid 10～40g/l, molybdenumdisulphide 0.1～10g/l, trolamine 20～40ml/l, glycerine 2～10ml/l, Sodium.alpha.-hydroxypropionate 3～15g/l, Sodium dodecylbenzene sulfonate 0.1～3g/l in the electrolytic solution;
(2) hard swabbing immerses workpiece in the described electrolytic solution, and workpiece connects positive source as anode, and counter electrode is connected on the power cathode as negative electrode, and power supply adopts dual-pulse power supply, and requiring forward current density is 0.5～5A/dm
2, the negative current scope is 0.1～0.5A, and the positive negative pulse stuffing duty cycle range is 3: 1～1: 2, and electrolyte temperature is 0～10 ℃, and alr mode is a pneumatic blending, the treatment time is 20～60min.
There are grease or oxide skin in the Al alloy parts surface of described hard swabbing, carries out conventional pre-treatment before the hard swabbing, comprises oil removing and cleaning.
Described pre-treatment oil removing and cleaning comprise the following steps:
(1) workpiece polishes through abrasive paper for metallograph;
(2) to the grease or the oxide skin of workpiece surface, in 40～60 ℃ of following oil removing 2～6min, clear water is washed then with alkaline degreasing fluid, again in 20g/l NaoH solution alkali cleaning 30～90S again clear water wash, be bright dipping 5～30S in 10% the dilute nitric acid solution in concentration again, clear water is washed again.
Compared with prior art, the hard lubricant film layer thickness range that adopts this preparation method to make is 30～80 μ m, hardness Hv350～420, and frictional coefficient is 0.15～0.25, this preparation method's advantage is: 1. the treatment time lacks, and technology is simple; 2. preparation process is carried out under 0～10 ℃ of low temperature, so workpiece need not high-temperature heat treatment, can not be out of shape; 3. adopt the film performance and the fluorine synergism coat of this prepared similar, be fit to the wrought aluminium alloy of all hardening oxidations.
Embodiment
The preparation method of hard lubricant film layer of aluminum alloy of the present invention comprises: there are grease or oxide skin in the Al alloy parts surface, carry out conventional pre-treatment, comprise oil removing and cleaning, oil removing and cleaning are about to workpiece after the abrasive paper for metallograph polishing, use alkaline degreasing fluid (commercially available 896 degreasers) at 40～60 ℃ of following oil removing 2～6min again, clear water is washed then, alkali cleaning 30～90S in 20g/1NaoH solution again, clear water is washed again, be bright dipping 5～30S in 10% the dilute nitric acid solution in concentration again, clear water is washed again, and pre-treatment finishes.For the very clean no grease in Al alloy parts surface, non-scale, can save pretreatment process.
Before entering the hard swabbing, prepare electrolytic solution earlier, adopt deionized water preparation electrolytic solution, comprise sulfuric acid 100～300g/l, oxalic acid 10～40g/l, molybdenumdisulphide 0.1～10g/l, trolamine 20～40ml/l, glycerine 2～10ml/l, Sodium.alpha.-hydroxypropionate 3～15g/l, Sodium dodecylbenzene sulfonate 0.1～3g/l in the electrolytic solution; To immerse in the above-mentioned electrolytic solution through pretreated workpiece then, workpiece connects positive source as anode, and counter electrode is connected on the power cathode as negative electrode, and power supply adopts dual-pulse power supply, and requiring forward current density is 0.5～5A/dm
2, the negative current scope is 0.1～0.5A, and the positive negative pulse stuffing duty cycle range is 3: 1～1: 2, and electrolyte temperature is 0～10 ℃, and alr mode is a pneumatic blending, the treatment time is 20～60min.
Below will be with same material, same specification, the following different result that obtains further describes preparation method of the present invention in different technology conditions.
Embodiment 1
Sample material LY12, specimen size ￠ 100mm * 10mm, (1) sample polishes through abrasive paper for metallograph, and is stand-by; (2) pre-treatment, sample or workpiece surface have grease or oxide skin, available alkaline degreasing fluid (commercially available 896 degreasers) is in 40～60 ℃ of following oil removing 2～6min, clear water is washed then, alkali cleaning 30～90S in 20g/1NaoH solution again, clear water is washed again, is bright dipping 5～30S in 10% the dilute nitric acid solution in concentration again, and clear water is washed again.(3) hard swabbing, electrolytic solution is formed H
2SO
4125g/l, oxalic acid 35g/l, MoS
20.5g/l, trolamine 30ml/l, glycerine 8ml/l, Sodium.alpha.-hydroxypropionate 5g/l, Sodium dodecylbenzene sulfonate 0.2g/l; Sample is immersed in the electrolytic solution, and workpiece connects positive source as anode, and counter electrode is connected on the power cathode as negative electrode; Power supply adopts dual-pulse power supply, and the positive pulse electric current is 3.6A, and the negative pulse electric current is 0.2A, dutycycle 4: 7, and electrolyte temperature is 7 ± 1 ℃, alr mode is a pneumatic blending, treatment time 25min.
The hard lubricant film layer thickness 35 μ m of preparation, hardness Hv420 hot spot do not occur through 312 hours rear surfaces of neutral salt spray test, and frictional coefficient is 0.22.
Embodiment 2
Sample material LY12, specimen size ￠ 100mm * 10mm, 5 of primary treatments, (1) sample polishes through abrasive paper for metallograph, and is stand-by; (2) pre-treatment, sample or workpiece surface have grease or oxide skin, available alkaline degreasing fluid (commercially available 896 degreasers) is in 40～60 ℃ of following oil removing 2～6min, clear water is washed then, alkali cleaning 30～90S in 20g/1NaoH solution again, clear water is washed again, is bright dipping 5～30S in 10% the dilute nitric acid solution in concentration again, and clear water is washed again.(3) hard swabbing, electrolytic solution is formed H
2SO
4180g/l, oxalic acid 30g/l, MoS
25g/l, trolamine 22ml/l, glycerine 6ml/l, Sodium.alpha.-hydroxypropionate 8g/l, Sodium dodecylbenzene sulfonate 1g/l; Sample is immersed in the electrolytic solution, and workpiece connects positive source as anode, and counter electrode is connected on the power cathode as negative electrode; Power supply adopts dual-pulse power supply, and the positive pulse electric current is 23A, and the negative pulse electric current is 0.4A, dutycycle 3: 1, and electrolyte temperature is 3 ± 1 ℃, alr mode is a pneumatic blending, treatment time 35min.
The hard lubricant film layer thickness 48 μ m of preparation, hardness Hv402 hot spot do not occur through 312 hours rear surfaces of neutral salt spray test, and frictional coefficient is 0.2.
Embodiment 3
Sample material LY12, specimen size ￠ 100mm * 10mm (1) sample polishes through abrasive paper for metallograph, and is stand-by; (2) pre-treatment, sample or workpiece surface have grease or oxide skin, available alkaline degreasing fluid (commercially available 896 degreasers) is in 40～60 ℃ of following oil removing 2～6min, clear water is washed then, alkali cleaning 30～90S in 20g/1NaoH solution again, clear water is washed again, is bright dipping 5～30S in 10% the dilute nitric acid solution in concentration again, and clear water is washed again.(3) hard swabbing, electrolytic solution is formed H
2SO
4250g/l, oxalic acid 15g/l, MoS
28g/l, trolamine 35ml/l, glycerine 4ml/l, Sodium.alpha.-hydroxypropionate 12g/l, Sodium dodecylbenzene sulfonate 3g/l; Sample is immersed in the electrolytic solution, and workpiece connects positive source as anode, and counter electrode is connected on the power cathode as negative electrode; Power supply adopts dual-pulse power supply, and the positive pulse electric current is 2A, and the negative pulse electric current is 0.3A, dutycycle 6: 5, and electrolyte temperature is 5 ± 1 ℃, alr mode is a pneumatic blending, treatment time 50min.
The hard lubricant film layer thickness 78 μ m of preparation, hardness Hv350 hot spot do not occur through 312 hours rear surfaces of neutral salt spray test, and frictional coefficient is 0.18.
Claims (3)
1, a kind of preparation method of hard lubricant film layer of aluminum alloy is characterized in that this preparation method comprises the following steps:
(1) preparation electrolytic solution, adopt deionized water preparation electrolytic solution, comprise sulfuric acid 100～300g/l, oxalic acid 10～40g/l, molybdenumdisulphide 0.1～10g/l, trolamine 20～40ml/l, glycerine 2～10ml/l, Sodium.alpha.-hydroxypropionate 3～15g/l, Sodium dodecylbenzene sulfonate 0.1～3g/l in the electrolytic solution;
(2) hard swabbing immerses workpiece in the described electrolytic solution, and workpiece connects positive source as anode, and counter electrode is connected on the power cathode as negative electrode, and power supply adopts dual-pulse power supply, and requiring forward current density is 0.5～5A/dm
2, the negative current scope is 0.1～0.5A, and the positive negative pulse stuffing duty cycle range is 3: 1～1: 2, and electrolyte temperature is 0～10 ℃, and alr mode is a pneumatic blending, the treatment time is 20～60min.
2, the preparation method of hard lubricant film layer of aluminum alloy according to claim 1, there are grease or oxide skin in the Al alloy parts surface that it is characterized in that described hard swabbing, carries out conventional pre-treatment before the hard swabbing, comprises oil removing and cleaning.
3, the preparation method of hard lubricant film layer of aluminum alloy according to claim 2 is characterized in that described pre-treatment oil removing and cleaning comprise the following steps:
(1) workpiece polishes through abrasive paper for metallograph;
(2) to the grease or the oxide skin of workpiece surface, in 40～60 ℃ of following oil removing 2～6min, clear water is washed then with alkaline degreasing fluid, again in 20g/lNaoH solution alkali cleaning 30～90S again clear water wash, be bright dipping 5～30S in 10% the dilute nitric acid solution in concentration again, clear water is washed again.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102312264A (en) * | 2011-08-22 | 2012-01-11 | 吴江市精工铝字制造厂 | Decorative oxidation method for aluminum and aluminum alloy |
| CN102625583A (en) * | 2012-04-10 | 2012-08-01 | 苏州市嘉明机械制造有限公司 | Anti-seize laminated aluminum mirror plate manufacturing process |
| CN103981556A (en) * | 2014-05-19 | 2014-08-13 | 广东美芝制冷设备有限公司 | Electrolyte for hard-anodizing of aluminum alloys and preparation method of aluminum alloy hard self-lubricating coatings |
| CN107236978A (en) * | 2016-07-09 | 2017-10-10 | 平顶山市美伊金属制品有限公司 | The enclosure method of the packing material and pore of closing oxidation rear substrate surface pore |
| CN106757261B (en) * | 2016-11-29 | 2018-11-09 | 中南大学 | A kind of aluminium material surface oxide ceramic membrane and the compound wear-and corrosion-resistant coating and preparation method thereof of zeolite membrane |
| CN109097806A (en) * | 2018-10-09 | 2018-12-28 | 长春工业大学 | A kind of aluminium alloy and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2923434B2 (en) * | 1994-07-20 | 1999-07-26 | 株式会社フジクラ | Piston for internal combustion engine and method of manufacturing the same |
| FR2839729B1 (en) * | 2002-05-16 | 2005-02-11 | Univ Toulouse | METHOD FOR PROTECTING AN ALUMINUM STEEL OR ALLOY SUBSTRATE AGAINST CORROSION ENABLING IT TO PROVIDE TRIBOLOGICAL PROPERTIES, AND SUBSTRATE OBTAINED |
| CN1403633A (en) * | 2002-10-10 | 2003-03-19 | 上海交通大学 | Ultrasonic prepn process of self-lubricating surface composite material |
| CN1175131C (en) * | 2002-10-10 | 2004-11-10 | 上海交通大学 | Macroporous thick-film process for anode oxidization of phosphoric acid |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102312264A (en) * | 2011-08-22 | 2012-01-11 | 吴江市精工铝字制造厂 | Decorative oxidation method for aluminum and aluminum alloy |
| CN102312264B (en) * | 2011-08-22 | 2013-10-09 | 吴江市精工铝字制造厂 | Decorative oxidation method for aluminum and aluminum alloy |
| CN102625583A (en) * | 2012-04-10 | 2012-08-01 | 苏州市嘉明机械制造有限公司 | Anti-seize laminated aluminum mirror plate manufacturing process |
| CN103981556A (en) * | 2014-05-19 | 2014-08-13 | 广东美芝制冷设备有限公司 | Electrolyte for hard-anodizing of aluminum alloys and preparation method of aluminum alloy hard self-lubricating coatings |
| CN103981556B (en) * | 2014-05-19 | 2017-02-22 | 广东美芝制冷设备有限公司 | Electrolyte for hard-anodizing of aluminum alloys and preparation method of aluminum alloy hard self-lubricating coatings |
| CN107236978A (en) * | 2016-07-09 | 2017-10-10 | 平顶山市美伊金属制品有限公司 | The enclosure method of the packing material and pore of closing oxidation rear substrate surface pore |
| CN106757261B (en) * | 2016-11-29 | 2018-11-09 | 中南大学 | A kind of aluminium material surface oxide ceramic membrane and the compound wear-and corrosion-resistant coating and preparation method thereof of zeolite membrane |
| CN109097806A (en) * | 2018-10-09 | 2018-12-28 | 长春工业大学 | A kind of aluminium alloy and preparation method thereof |
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