CN101338446A - Heat treatment process for aluminum alloy self-lubricating surface composite material - Google Patents
Heat treatment process for aluminum alloy self-lubricating surface composite material Download PDFInfo
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- CN101338446A CN101338446A CNA2008100225052A CN200810022505A CN101338446A CN 101338446 A CN101338446 A CN 101338446A CN A2008100225052 A CNA2008100225052 A CN A2008100225052A CN 200810022505 A CN200810022505 A CN 200810022505A CN 101338446 A CN101338446 A CN 101338446A
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Abstract
The invention provides a heat treatment process of a self-lubricating aluminum alloy surface composite material. Firstly, after being hard anodized and filled with PTFE nano lubrication particles, the aluminum alloy materials is placed in a vacuum furnace to be heated under 330 DEG C to 390 DEG C and vacuumized to make absolute pressure below 1* 10<-2> Pa; and when the absolute pressure is below 1* 10<-2> Pa, heat is preserved for 30 to 120min. Afterwards, the aluminum alloy material stops being vacuumized; air passes through the furnace and temperature in the furnace maintains 300 DEG C to 390 DEG C; and the furnace is cooled. The heat treatment process can bond a lubricating film with an aluminum alloy anodic oxide film more tightly via imitation negative pressure filling. The friction coefficient of the treated self-lubricating aluminum alloy surface composite material is greatly reduced; the service life of a self-lubricating film of the aluminum alloy surface is prolonged; and wear-resisting property is greatly improved. Therefore, the heat treatment process is worth being popularized and applied widely.
Description
Technical field
The present invention relates to the thermal treatment process of matrix material, relate in particular to the thermal treatment process of aluminium alloy anode oxide film surface tetrafluoroethylene slip coating, belong to technical field of composite materials.
Background technology
For solve aluminum alloy material surface matter soft, wear no resistance, weakness such as frictional coefficient height, need carry out the tribology surface modification treatment of aluminium and aluminium alloy.At first, prepare hard anodized film, in the micropore on pellumina surface, fill various oilness materials subsequently, make aluminium material surface have good wear resistance and good self lubricity in aluminum alloy surface.
For guaranteeing self-lubricating surface coating reliability, must guarantee that slip coating and oxide film have good bonding force.Preparation and fill process to the wide aperture anode oxide film has a large amount of research at present, these researchs are less at the thermal treatment process research that improves slip coating and oxide film bonding force, generally adopt general thermal treatment process, its technology can't guarantee that slip coating and oxide film combine closely, thereby cause short result of aluminium alloy surface self-lubricating life-span, its lubricant effect is not satisfactory.
Summary of the invention
The objective of the invention is to overcome the deficiency that prior art exists, provide a kind of thermal treatment process of aluminum alloy self-lubricating surface composite material, the bonding force that is intended to effectively improve slip coating and anode oxide film.
Purpose of the present invention is achieved through the following technical solutions:
The thermal treatment process of aluminum alloy self-lubricating surface composite material, aluminum alloy materials is carried out hard anodizing, in the hard anodized film porous, introduce the polytetrafluorethylenano nano lubricated granules, the vacuum heat-treating method of filling by imitative negative pressure makes lubricated granules and anode oxide film combine closely, and specifically may further comprise the steps---
(a) will be positioned in the vacuum oven through hard anodizing and filled polytetrafluoroethylene nano lubricating particulate aluminum alloy materials, and heat, Heating temperature is 330 ℃～390 ℃;
(b) treat that temperature reaches 330 ℃～390 ℃ in the stove after, begin to vacuumize, make absolute pressure be lower than 1 * 10
-2Pa;
(c) be lower than 1 * 10 when absolute pressure
-2After the Pa, begin insulation, soaking time is 30min～120min;
(d) after the end insulation, shed vacuum, when in stove, putting into air, make the interior temperature of stove be controlled at 330 ℃～390 ℃;
(e) treat that the stove internal gas pressure reaches after the barometric point, furnace cooling in stove.
Further, the thermal treatment process of above-mentioned aluminum alloy self-lubricating surface composite material, step (b) is controlled at 360 ℃～380 ℃ with temperature in the stove, vacuumizes, and makes absolute pressure 1 * 10
-3Pa～1 * 10
-2Pa.
Further, the thermal treatment process of above-mentioned aluminum alloy self-lubricating surface composite material will be positioned in the vacuum oven through hard anodizing and filled polytetrafluoroethylene nano lubricating particulate aluminum alloy materials, heat, and Heating temperature is 380 ℃; After treating that temperature arrives 380 ℃ in the stove, begin to vacuumize, make absolute pressure 1 * 10
-3Pa; When absolute pressure reaches 1 * 10
-3After the Pa, begin insulation, soaking time is 90min; After finishing insulation, shed vacuum, putting into air in stove when, making the interior temperature of stove is 380 ℃; Treat that the stove internal gas pressure arrives after the barometric point furnace cooling.
Substantive distinguishing features and obvious improvement that technical solution of the present invention is outstanding are mainly reflected in:
The vacuum heat treatment process that the present invention fills by imitative negative pressure is combined closely tetrafluoroethylene lubricated granules and anode oxide film.In the heat-processed, the polytetrafluorethylenano nano lubricated granules of aluminum alloy surface begins gradually to dissolve and enters flow state; In the process that vacuumizes, the air in the aluminium alloy anode oxide film nanoporous together is drawn out of together with furnace air; At holding stage, the tetrafluoroethylene of molten state tiles in the Process on Aluminum Alloy Oxidation Film surface flow, feasible lubricant film uniform distribution everywhere; After insulation finished, temperature was higher than 330 ℃ of tetrafluoroethylene melting temperatures in the stove, bubbling air in stove, and the inside and outside pressure gradient that forms of nanoporous, the negative pressure that this process forms will be dissolved and be had mobile lubricator and be pressed into depths with the hole in the hole in; Treat furnace pressure and extraneous identical postcooling, lubricated granules solidifies again in the hole depths, forms in conjunction with good coating.It is tightr that the vacuum heat-treating method that adopts imitative negative pressure to fill makes that lubricant film combines with aluminium alloy anode oxide film, the aluminum alloy self-lubricating surface composite material frictional coefficient of handling reduces greatly, the aluminium alloy surface self-lubricating membrane lifetime increases, wear resisting property significantly improves, produce very good economic benefit, be worth wide popularization and application in the field of business.
Embodiment
The invention provides the vacuum heat treatment process that the imitative negative pressure of a kind of aluminum alloy self-lubricating surface composite material is filled, after aluminum alloy materials process anodic oxidation and tetrafluoroethylene lubricated granules are filled, vacuum heat-treating method by imitative negative pressure is filled is combined closely tetrafluoroethylene lubricated granules and anode oxide film.
The vacuum heat treatment process that imitative negative pressure is filled, the temperature of vacuum heat treatment is 330 ℃～390 ℃, makes absolute pressure be lower than 1 * 10
-2Pa; Temperature and vacuum tightness are incubated after reaching and specifying requirement, and soaking time is 30min～120min; After insulation finishes, in insulation, shed vacuum, after air pressure arrives normal pressure, cool off again; The type of cooling is a furnace cooling.
Embodiment 1:
To be positioned in the vacuum oven through the aluminum alloy materials behind hard anodizing and the filled polytetrafluoroethylene nano lubricating particle earlier, heat, Heating temperature is 360 ℃.After treating that temperature arrives 360 ℃ in the stove, begin to vacuumize, make absolute pressure reach 5 * 10
-3Pa.When absolute pressure reaches 5 * 10
-3Behind the Pa, begin insulation, soaking time is 60min.After finishing insulation, shed vacuum, when in stove, putting into air, guarantee that temperature is higher than 330 ℃ in the stove.Treat that the stove internal gas pressure arrives after the barometric point, is placed on furnace cooling in the stove.
Embodiment 2:
To be positioned in the vacuum oven through the aluminum alloy materials behind hard anodizing and the filled polytetrafluoroethylene nano lubricating particle, heat, Heating temperature is 380 ℃.After treating that temperature arrives 380 ℃ in the stove, begin to vacuumize, make absolute pressure reach 1 * 10
-2Pa.When absolute pressure reaches 1 * 10
-2After the Pa, begin insulation, soaking time is 90min.After finishing insulation, shed vacuum, when in stove, putting into air, guarantee that temperature is higher than 330 ℃ in the stove.Treat that the stove internal gas pressure arrives after the barometric point, is placed on furnace cooling in the stove.
Embodiment 3:
To be positioned in the vacuum oven through hard anodizing and filled polytetrafluoroethylene nano lubricating particulate aluminum alloy materials, and heat, Heating temperature is 380 ℃; After treating that temperature arrives 380 ℃ in the stove, begin to vacuumize, make absolute pressure 1 * 10
-3Pa; When absolute pressure reaches 1 * 10
-3After the Pa, begin insulation, soaking time is 90min; After finishing insulation, shed vacuum, putting into air in stove when, making the interior temperature of stove is 380 ℃; Treat that the stove internal gas pressure arrives after the barometric point furnace cooling.
Embodiment 4:
To be positioned in the vacuum oven through hard anodizing and filled polytetrafluoroethylene nano lubricating particulate aluminum alloy materials, and heat, Heating temperature is 370 ℃; After treating that temperature arrives 370 ℃ in the stove, begin to vacuumize, make absolute pressure 6 * 10
-3Pa; When absolute pressure reaches 6 * 10
-3After the Pa, begin insulation, soaking time is 120min; After finishing insulation, shed vacuum, putting into air in stove when, temperature is at 330 ℃～390 ℃ in the control stove; Treat that the stove internal gas pressure arrives after the barometric point furnace cooling.
Embodiment 5:
To be positioned in the vacuum oven through hard anodizing and filled polytetrafluoroethylene nano lubricating particulate aluminum alloy materials, and heat, Heating temperature is 390 ℃; After treating that temperature arrives 390 ℃ in the stove, begin to vacuumize, make absolute pressure 2 * 10
-3Pa; When absolute pressure reaches 2 * 10
-3After the Pa, begin insulation, soaking time is 30min; After finishing insulation, shed vacuum, when in stove, putting into air, make the interior temperature of stove be higher than 330 ℃; Treat that the stove internal gas pressure arrives after the barometric point furnace cooling.
Material with material that the foregoing description obtained and ordinary heat treatment are obtained carries out friction-wear test respectively on WM-2002 frictional wear instrument, even part is GCr15, and motor speed is 500r/min, and the rotation diameter is 10mm, fraction time 30min.Friction and wear test results shows, the heat treated self-lubricating film of ordinary process is in preceding 5min frictional coefficient＜0.15 of attrition, and beginning constantly increases behind the 5min, and frictional coefficient reaches 0.5 behind the 30min, and lubricant film and oxide film are worn and expose substrate.And the imitative heat treated self-lubricating film of negative pressure filled vacuum technology of the present invention is 0.122 at 30min time coefficient of interal friction mean value, and lubricant film all is not worn.As seen, through the aluminum alloy surface after the vacuum heat treatment process processing of imitative negative pressure filling, its lubricant film combines tightr with oxide film, make frictional coefficient reduce greatly, and the life-span is longer, and wear resistance is better.
In sum, the vacuum heat treatment process that the imitative negative pressure of the present invention is filled, in heat-processed, the polytetrafluorethylenano nano lubricated granules of aluminum alloy surface begins gradually to dissolve and enters flow state.In the process that vacuumizes, the air in the aluminium alloy anode oxide film nanoporous together is drawn out of together with furnace air.At holding stage, the tetrafluoroethylene of molten state tiles in the Process on Aluminum Alloy Oxidation Film surface flow, feasible lubricant film uniform distribution everywhere.After insulation finished, temperature was higher than 330 ℃ of tetrafluoroethylene melting temperatures in the stove, bubbling air in stove, and the inside and outside pressure gradient that forms of nanoporous, the negative pressure that this process forms will be dissolved and be had mobile lubricator and be pressed into depths with the hole in the hole in.After treating that furnace pressure is identical with the external world, begin to cool down, lubricated granules solidifies again in the hole depths, forms in conjunction with good coating.Compare with present Conventional Heat Treatment technology, the aluminum alloy self-lubricating surface composite material frictional coefficient that the vacuum heat-treating method that adopts imitative negative pressure to fill is handled reduces greatly, the aluminium alloy surface self-lubricating membrane lifetime increases, wear resisting property obviously improves, economic benefit is particularly remarkable, and application prospect is very good.
Below only be concrete exemplary applications of the present invention, protection scope of the present invention is not constituted any limitation.All employing equivalents or equivalence are replaced and the technical scheme of formation, all drop within the rights protection scope of the present invention.
Claims (3)
1. the thermal treatment process of aluminum alloy self-lubricating surface composite material, it is characterized in that: aluminum alloy materials is by introducing the polytetrafluorethylenano nano lubricated granules in the hard anodized film porous behind the hard anodizing, the vacuum heat-treating method of filling by imitative negative pressure is combined closely polytetrafluorethylenano nano lubricated granules and anode oxide film, specifically may further comprise the steps---
(a) will be positioned in the vacuum oven through hard anodizing and filled polytetrafluoroethylene nano lubricating particulate aluminum alloy materials, and heat, Heating temperature is 330 ℃～390 ℃;
(b) treat that temperature reaches 330 ℃～390 ℃ in the stove after, begin to vacuumize, make absolute pressure be lower than 1 * 10
-2Pa;
(c) be lower than 1 * 10 when absolute pressure
-2After the Pa, begin insulation, soaking time is 30min～120min;
(d) after the end insulation, shed vacuum, when in stove, putting into air, make the interior temperature of stove be controlled at 330 ℃～390 ℃;
(e) treat that the stove internal gas pressure reaches after the barometric point, furnace cooling in stove.
2. the thermal treatment process of aluminum alloy self-lubricating surface composite material according to claim 1, it is characterized in that: step (b) is controlled at 360 ℃～380 ℃ with temperature in the stove, vacuumizes, and makes absolute pressure 1 * 10
-3Pa～1 * 10
-2Pa.
3. the thermal treatment process of aluminum alloy self-lubricating surface composite material according to claim 1 and 2, it is characterized in that: will be positioned in the vacuum oven through hard anodizing and filled polytetrafluoroethylene nano lubricating particulate aluminum alloy materials, heat, Heating temperature is 380 ℃; After treating that temperature arrives 380 ℃ in the stove, begin to vacuumize, make absolute pressure 1 * 10
-3Pa; When absolute pressure reaches 1 * 10
-3After the Pa, begin insulation, soaking time is 90min; After finishing insulation, shed vacuum, putting into air in stove when, making the interior temperature of stove is 380 ℃; Treat that the stove internal gas pressure arrives after the barometric point furnace cooling.
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|---|---|---|---|
| CN2008100225052A CN101338446B (en) | 2008-08-14 | 2008-08-14 | Heat treatment process for aluminum alloy self-lubricating surface composite material |
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| CN2008100225052A CN101338446B (en) | 2008-08-14 | 2008-08-14 | Heat treatment process for aluminum alloy self-lubricating surface composite material |
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| CN101338446B CN101338446B (en) | 2011-03-30 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102115885B (en) * | 2009-12-30 | 2012-07-18 | 上海工程技术大学 | Oil-free self-lubricating plating technique of aluminum alloy parts |
| 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 |
| CN107475763A (en) * | 2017-08-15 | 2017-12-15 | 重庆新久融科技有限公司 | A kind of aluminum alloy mould plate and its processing method with self-lubricating film layer |
| CN108385149A (en) * | 2018-04-24 | 2018-08-10 | 上海傲聚精密模塑有限公司 | The face coat forming method of aluminium alloy tooling magazine |
| CN111334834A (en) * | 2020-03-11 | 2020-06-26 | 梁世花 | Method for making oleophylic non-stick cooking utensils |
-
2008
- 2008-08-14 CN CN2008100225052A patent/CN101338446B/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102115885B (en) * | 2009-12-30 | 2012-07-18 | 上海工程技术大学 | Oil-free self-lubricating plating technique of aluminum alloy parts |
| 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 |
| CN107475763A (en) * | 2017-08-15 | 2017-12-15 | 重庆新久融科技有限公司 | A kind of aluminum alloy mould plate and its processing method with self-lubricating film layer |
| CN108385149A (en) * | 2018-04-24 | 2018-08-10 | 上海傲聚精密模塑有限公司 | The face coat forming method of aluminium alloy tooling magazine |
| CN111334834A (en) * | 2020-03-11 | 2020-06-26 | 梁世花 | Method for making oleophylic non-stick cooking utensils |
| CN111334834B (en) * | 2020-03-11 | 2021-03-19 | 梁世花 | Method for making oleophylic non-stick cooking utensils |
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|---|---|
| CN101338446B (en) | 2011-03-30 |
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Effective date of registration: 20171127 Address after: 102209 Changping District City, Beiqijia, the future of science and technology in the south area of the town of Beijing Patentee after: China Aluminum Material Applied Research Institute Co Ltd Address before: Suzhou City, Jiangsu province 215021 Industrial Park No. 200 Shen Hu Road Patentee before: Suzhou Non-ferrous Metal academy Co., Ltd. |
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