CN104131324A - Aluminum alloy piston for internal combustion engine - Google Patents
Aluminum alloy piston for internal combustion engine Download PDFInfo
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- CN104131324A CN104131324A CN201410394485.7A CN201410394485A CN104131324A CN 104131324 A CN104131324 A CN 104131324A CN 201410394485 A CN201410394485 A CN 201410394485A CN 104131324 A CN104131324 A CN 104131324A
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- alloy piston
- aluminium
- sealing
- aluminum alloy
- ceramic membrane
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- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The invention discloses an aluminum alloy piston for an internal combustion engine. A groove for forming a part of a combustion chamber is arranged at the top of the aluminum alloy piston and ceramic films are arranged on the top face of the aluminum alloy piston and the inner wall of the groove. The ceramic film on the top of the internal combustion engine disclosed by the invention is 2-3 times as thick as an anode oxide film. The aluminum alloy piston is good in heat-insulating property, and under a same heat-insulating test condition, the heat-insulating temperature of the heat-insulating film is about 15 DEG C higher than that of the anode oxide film. The aluminum alloy piston is good in ablation resistance, can resist instantaneous high temperature at 2500 DEG C and is not melted at the high temperature for 20 seconds. The bonding strength of the ceramic film and an aluminum alloy base body reaches up to 40MPa, so that the ceramic film does not fall.
Description
Technical field
The present invention relates to engine art, particularly a kind of aluminium-alloy piston of oil engine.
Background technology
Along with the upgrading of engine Abgasgesetz, temperature, the pressure of the combustion chamber of engine aluminum alloy piston require more and more higher, the particularly gas blowing engine taking Sweet natural gas, liquefied gas as fuel, the thermal load of aluminium-alloy piston is higher, often there is the significant troubles such as molten top, cracking in aluminium-alloy piston, has a strong impact on the reliability of engine.The method addressing the above problem in prior art is to adopt anode oxidation surface processing process to process aluminium-alloy piston top, makes the combustion chamber of aluminium-alloy piston, the Al of end face Surface Creation one deck amorphous phase
2o
3zone of oxidation, improves its thermotolerance.
But, the Al that anode oxidation surface processing process generates
2o
3oxide film, its heterogeneous microstructure is amorphous phase, and thickness is smaller, and at 30～50 microns, thermal insulation is poor, and poor thermal shock resistance still easily occurs that aluminium-alloy piston melts the faults such as top, cracking.In addition, the technique more complicated of anodized surface processing, be difficult to control, and the consistence of quality product is poor.
The information that is disclosed in this background technology part is only intended to increase the understanding to general background of the present invention, and should not be regarded as admitting or imply that in any form this information structure has been the known prior art of persons skilled in the art.
Summary of the invention
The object of the present invention is to provide a kind of aluminium-alloy piston of oil engine, thereby it is poor to overcome the aluminium-alloy piston top thermal insulation of anode oxidation surface processing process processing, poor thermal shock resistance, and the poor defect of the consistence of quality.
For achieving the above object, the invention provides a kind of aluminium-alloy piston of oil engine, the top of aluminium-alloy piston is provided with the groove of a part that is used to form combustion chamber, on the end face of aluminium-alloy piston and the inwall of groove, is equipped with ceramic membrane.
Preferably, in technique scheme, the thickness of ceramic membrane is 30～150um.
Preferably, in technique scheme, the surfaceness of ceramic membrane is 0.8～3.2.
Preferably, in technique scheme, the top of aluminium-alloy piston adopts Microarc Oxidation Surface Treatment to form ceramic membrane.
Preferably, in technique scheme, ceramic membrane utilizes hole sealing device to carry out hole-sealing technology processing.
Preferably, in technique scheme, hole sealing device comprises: the sealing of hole tank of sealing, in sealing of hole tank, be loaded with pore-sealing liquid, and pore-sealing liquid is Na2SiO3 solution, and aluminium-alloy piston is immersed in pore-sealing liquid; Vacuum pump, vacuum pump is connected with sealing of hole tank, for vacuumizing for sealing of hole tank.
Compared with prior art, the present invention has following beneficial effect:
The ceramic membrane thickness at the aluminium-alloy piston top of oil engine of the present invention reaches 2-3 times of anode oxide film; Heat-proof quality is good, and under identical heat insulation test condition, the heat insulation temperature of thermal isolation film is than the high 15 degree left and right of the heat insulation temperature of anode oxide film; Burning corrosion resistance is good, and resistance to TRANSIENT HIGH TEMPERATURE reaches 2500 DEG C and also can continue not melt for 20 seconds at this high temperature.The bonding strength of ceramic membrane and alloy matrix aluminum, up to 40MPa, therefore can not come off; By 100,000 kilometers of road tests of Sweet natural gas heavy duty engine, ceramic membrane is excellent, has avoided well gas engine piston to melt the faults such as top, cracking.
Brief description of the drawings
Fig. 1 is according to the structure iron of the aluminium-alloy piston of oil engine of the present invention.
Fig. 2 is the enlarged view of the ceramic membrane in Fig. 1.
Fig. 3 is the structure iron of hole sealing device.
Main description of reference numerals:
1-aluminium-alloy piston, 11-ceramic membrane, 12-groove.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail, but is to be understood that protection scope of the present invention is not subject to the restriction of embodiment.
Unless separately there is other clearly to represent, otherwise in whole specification sheets and claims, term " comprises " or its conversion was stated being understood to include as " comprising " or " including " etc. element or integral part, and do not get rid of other element or other integral part.
As shown in Figure 1, be provided with circular groove 12 according to the center at the top of the aluminium-alloy piston 1 of the oil engine of the specific embodiment of the invention, be used to form a part for combustion chamber.
In order to make aluminium-alloy piston 1 there is higher thermotolerance, adopt top and the groove 12 of Microarc Oxidation Surface Treatment technique to aluminium-alloy piston 1 to carry out surface treatment, form ceramic membrane 11.
The principle of Microarc Oxidation Surface Treatment is: the non-ferrous metal samples such as Al, Mg, Ti are put into electrolytic solution, and after energising, metallic surface generates very thin one deck amorphous phase Al immediately
2o
3insulating film.In the time that the voltage applying on metal sample exceedes a certain threshold value, this layer of Al
2o
3on insulating film, some weak link is breakdown, micro-arc discharge phenomenon occurs, and the surface of metal sample produces spark, and instantaneous temperature exceedes 2000 DEG C, thereby make the surface of metal sample that chemical oxidation, electrochemical oxidation, plasma oxidation occur, reaction generates amorphous phase Al
2o
3become crystalline state phase---α-Al
2o
3, γ-Al
2o
3, just formed ceramic membrane.
When aluminium-alloy piston is carried out to Microarc Oxidation Surface Treatment, the work in-process of aluminium-alloy piston are packed in the shielding frock of box-like, not needing position to be processed to shield on aluminium-alloy piston, make outside the end face of aluminium-alloy piston is exposed to, then the shielding frock that makes to be equipped with aluminium-alloy piston immerses in differential arc oxidation treating pond carries out surface treatment, the ceramic membrane 11 that to generate thickness be 30～150um.Then to ceramic membrane grind, the processing such as throwing, obtain the ceramic membrane gauge that needs, finally obtain the piston 1 after ceramic membrane 11 strengthenings.As illustrated in fig. 1 and 2, ceramic membrane 11 covers end face and the circular groove 12 of piston.
Preferably, ceramic membrane 11 can pass through surfaceness processing, makes surface roughness Ra=0.8～3.2 of ceramic membrane 11.
Preferably, can utilize hole sealing device to carry out hole-sealing technology surface treatment to reduce the surfaceness of ceramic membrane 11 to ceramic membrane 11.As shown in Figure 3, hole sealing device is made up of sealing of hole tank 2, valve 4, tensimeter 5, vacuum pump 6.In sealing of hole tank, be loaded with pore-sealing liquid 3, pore-sealing liquid 3 is that concentration is the Na of 0.4g/mL left and right
2siO
3solution.Aluminium-alloy piston 1 is immersed in pore-sealing liquid 3.
The principle of hole-sealing technology is: opens valve 4, utilizes vacuum pump 6 to vacuumize the sealing of hole tank 2 of sealing, and in the time that the value of tensimeter 2 reaches preset value, valve-off 4.Aluminium-alloy piston 1 was left standstill after the scheduled time in the sealing of hole tank of sealing, aluminium-alloy piston is taken out, and dry up surperficial pore-sealing liquid with pressurized air, in air, dry, can complete hole-sealing technology, the surfaceness that reduces aluminium-alloy piston, makes ceramic membrane finer and close, smooth, reduces carbon distribution and adheres to, deposits, improves its antioxidant property.
The performance comparison of ceramic membrane and anode oxide film is as follows:
The ceramic membrane thickness at the aluminium-alloy piston top of oil engine of the present invention reaches 2-3 times of anode oxide film; Heat-proof quality is good, and under identical heat insulation test condition, the heat insulation temperature of thermal isolation film is than the high 15 degree left and right of the heat insulation temperature of anode oxide film; Burning corrosion resistance is good, and resistance to TRANSIENT HIGH TEMPERATURE reaches 2500 DEG C and also can continue not melt for 20 seconds at this high temperature.The bonding strength of ceramic membrane and alloy matrix aluminum, up to 40MPa, therefore can not come off; By 100,000 kilometers of road tests of Sweet natural gas heavy duty engine, ceramic membrane is excellent, has avoided well gas engine piston to melt the faults such as top, cracking.
The aforementioned description to concrete exemplary of the present invention is in order to illustrate and the object of illustration.These descriptions not want the present invention to be defined as disclosed precise forms, and obviously, according to above-mentioned instruction, can much change and change.Exemplary embodiment is selected and the object described is to explain certain principles of the present invention and practical application thereof, thereby made those skilled in the art can realize and utilize various exemplary of the present invention and various selection and change.Scope of the present invention is intended to be limited by claims and equivalents thereof.
Claims (6)
1. an aluminium-alloy piston for oil engine, is characterized in that, the top of described aluminium-alloy piston is provided with the groove of a part that is used to form combustion chamber, on the end face of described aluminium-alloy piston and the inwall of described groove, is equipped with ceramic membrane.
2. the aluminium-alloy piston of oil engine according to claim 1, is characterized in that, the thickness of described ceramic membrane is 30～150um.
3. the aluminium-alloy piston of oil engine according to claim 1 and 2, is characterized in that, the surfaceness of described ceramic membrane is 0.8～3.2.
4. the aluminium-alloy piston of oil engine according to claim 1, is characterized in that, the top of described aluminium-alloy piston adopts Microarc Oxidation Surface Treatment to form described ceramic membrane.
5. the aluminium-alloy piston of oil engine according to claim 1, is characterized in that, described ceramic membrane utilizes hole sealing device to carry out hole-sealing technology processing.
6. the aluminium-alloy piston of oil engine according to claim 5, is characterized in that, described hole sealing device comprises:
The sealing of hole tank of sealing, is loaded with pore-sealing liquid in described sealing of hole tank, and described pore-sealing liquid is Na
2siO
3solution, and described aluminium-alloy piston is immersed in described pore-sealing liquid;
Vacuum pump, described vacuum pump is connected with described sealing of hole tank, for vacuumizing for described sealing of hole tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410394485.7A CN104131324A (en) | 2014-08-12 | 2014-08-12 | Aluminum alloy piston for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410394485.7A CN104131324A (en) | 2014-08-12 | 2014-08-12 | Aluminum alloy piston for internal combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104131324A true CN104131324A (en) | 2014-11-05 |
Family
ID=51804170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410394485.7A Pending CN104131324A (en) | 2014-08-12 | 2014-08-12 | Aluminum alloy piston for internal combustion engine |
Country Status (1)
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|---|---|
| CN (1) | CN104131324A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105274599A (en) * | 2014-06-10 | 2016-01-27 | 丰田自动车株式会社 | Method for forming heat insulating film, and structure of heat insulating film |
| CN106194483A (en) * | 2016-07-11 | 2016-12-07 | 潍柴动力股份有限公司 | A kind of insulating piston |
| CN110520554A (en) * | 2017-05-05 | 2019-11-29 | 菲特尔莫古纽伦堡有限公司 | Heat insulating coat for aluminium piston |
| CN110747498A (en) * | 2019-12-02 | 2020-02-04 | 广西玉柴机器股份有限公司 | High-temperature-resistant light aluminum alloy piston of internal combustion engine and preparation method thereof |
| CN113088768A (en) * | 2021-04-02 | 2021-07-09 | 安徽省恒泰动力科技有限公司 | Aluminum alloy piston and preparation method thereof |
| CN115928170A (en) * | 2022-12-28 | 2023-04-07 | 浙江中行新材料科技有限公司 | Aluminum-based bending-resistant corrosion-resistant flexible ceramic film and preparation method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105274599A (en) * | 2014-06-10 | 2016-01-27 | 丰田自动车株式会社 | Method for forming heat insulating film, and structure of heat insulating film |
| CN105274599B (en) * | 2014-06-10 | 2018-11-23 | 丰田自动车株式会社 | The forming method of thermal isolation film and the structure of thermal isolation film |
| CN106194483A (en) * | 2016-07-11 | 2016-12-07 | 潍柴动力股份有限公司 | A kind of insulating piston |
| CN110520554A (en) * | 2017-05-05 | 2019-11-29 | 菲特尔莫古纽伦堡有限公司 | Heat insulating coat for aluminium piston |
| JP2020519802A (en) * | 2017-05-05 | 2020-07-02 | フェデラル−モグル ニュルンベルク ゲーエムベーハー | Thermally insulating coating for aluminum pistons |
| CN110747498A (en) * | 2019-12-02 | 2020-02-04 | 广西玉柴机器股份有限公司 | High-temperature-resistant light aluminum alloy piston of internal combustion engine and preparation method thereof |
| CN113088768A (en) * | 2021-04-02 | 2021-07-09 | 安徽省恒泰动力科技有限公司 | Aluminum alloy piston and preparation method thereof |
| CN115928170A (en) * | 2022-12-28 | 2023-04-07 | 浙江中行新材料科技有限公司 | Aluminum-based bending-resistant corrosion-resistant flexible ceramic film and preparation method thereof |
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Application publication date: 20141105 |