CN106481478A - A kind of self-lubricating steam-cylinder piston - Google Patents
A kind of self-lubricating steam-cylinder piston Download PDFInfo
- Publication number
- CN106481478A CN106481478A CN201610989123.1A CN201610989123A CN106481478A CN 106481478 A CN106481478 A CN 106481478A CN 201610989123 A CN201610989123 A CN 201610989123A CN 106481478 A CN106481478 A CN 106481478A
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- CN
- China
- Prior art keywords
- self
- cylinder piston
- graphite
- coating
- lubricating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F3/00—Pistons
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Combustion & Propulsion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Coating By Spraying Or Casting (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The invention discloses a kind of self-lubricating steam-cylinder piston, plasma spraying Ni cladding micron graphite and graphite ene coatings of the piston face with 20 30 μ m thick.The composite deposite of the present invention causes coefficient of friction and wear rate while reducing, with relatively low coefficient of friction, while with the wearability more excellent than Cr coating.Under each load, wear rate reduces by more than 50% than matrix.
Description
Technical field
The present invention relates to technical field of automobile, more particularly to a kind of self-lubricating steam-cylinder piston.
Background technology
Piston is reciprocating parts in Motor Engine Cylinder body.The basic structure of piston can be divided into top, head
Portion and skirt section.Top land is the major part for constituting combustion chamber, and its shape is relevant with selected combustion-chamber shape.
Piston is in high temperature, high pressure, at a high speed, work under conditions of insufficient lubrication.Piston is directly contacted with high-temperature gas, instantaneously
Therefore temperature, is heated serious, and radiating condition is very poor up to more than 2500K, so temperature is very high during pistons work, top
Up to 600～700K, and Temperature Distribution is very uneven；It is very big that top land bears gas pressure, particularly expansion space stroke pressure
Maximum, gasoline engine are up to 3～5MPa, and diesel engine is up to 6～9MPa, and this allows for piston and produces impact, and bears lateral pressure
Effect；Piston is moved back and forth with very high speed (8～12m/s) in cylinder, and speed changes constantly, this generates
Very big inertia force, makes piston be subject to very big additional load.Piston this severe under conditions of work, can be deformed simultaneously
Accelerated wear test, can also produce additional load and thermal stress, while being acted on by the chemical attack of combustion gas.Therefore the frictional force of piston
Larger.
Content of the invention
It is an object of the invention to a kind of self-lubricating steam-cylinder piston is proposed, enable to steam-cylinder piston friction and reduce.
For reaching this purpose, the present invention is employed the following technical solutions：
A kind of self-lubricating steam-cylinder piston, the piston face have the plasma spraying Ni cladding micron of 20-30 μ m thick
Graphite and graphite ene coatings.
Coating of the present invention is that Ni cladding micron graphite is mixed with graphite ene coatings.Preferably, the weight ratio
For (3-5):1, preferably 4:1.
The mixing is coating to be dusted using planetary ball mill and centrifugal spraying granulator.Its technique includes：
(1) by Ni cladding micron graphite particle and Graphene ball milling at least 5 minutes on planetary ball mill；
(2), when ball milling stops first 5 minutes, organic binder ball milling is added, obtains suspension；
(3) suspension is carried out mist projection granulating, obtains Ni cladding micron graphite and Graphene agglomerated particle.
The Ni is coated micron graphite by plasma spraying and sprays to vapour with Graphene agglomerated particle by the present invention
On cylinder piston face.The plasma spraying, its electric current are 400-700A, and voltage is 30-70V, main gas argon flow amount 50-
140L/min, powder feed rate 25-60g/min.Preferably, electric current is 550A, voltage 30V, argon flow amount 50L/min.
About 20-30 μm of the composite coating thickness of the present invention, its hardness is significantly improved compared with matrix, more than 500HV0.2.With
When, adding Graphene in composite coating and crystal grain is refined, average grain size drops to 20nm from the 40nm of pure Ni
Left and right.
Ni of the present invention coats micron graphite particle, is existing product, and those skilled in the art can pass through market
It is commercially available, it is also possible to which the method according to prior art is prepared.The present invention is no longer limited with regard to which.
The coating of the present invention, in process of friction and wear, graphite is constantly separated out from nickel bag graphite particle, in tangential masterpiece
Lower flowing is used, and the effect of filling and leading up can be played to ditch dug with a plow, thus can improve the wearability of main shaft.And the Graphene for adding, more suitable
Sliding, main shaft surface is attached to, reduces its frictional resistance.
The composite deposite of the present invention causes coefficient of friction and wear rate while reducing, with relatively low coefficient of friction, each
Under individual load, wear rate reduces by more than 50% than matrix.
Specific embodiment
Technical scheme is further illustrated below by specific embodiment.
Embodiment 1
Coating material is dusted using planetary ball mill and centrifugal spraying granulator.Its technique includes：
Coating material is dusted using planetary ball mill and centrifugal spraying granulator.Its technique includes：
(1) by Ni cladding micron graphite particle and Graphene ball milling at least 5 minutes on planetary ball mill；
(2), when ball milling stops first 5 minutes, organic binder ball milling is added, obtains suspension；
(3) suspension is carried out mist projection granulating, obtains Ni cladding micron graphite and Graphene agglomerated particle.
The Ni is coated micron graphite by plasma spraying to spray on piston face with Graphene agglomerated particle.Institute
Plasma spraying is stated, its electric current is 550A, voltage 30V, argon flow amount 50L/min.
Coating on the blower fan main shaft, its play self-lubricating solid effect.
Comparative example 1
The Graphene of embodiment 1 is omitted, remaining is same as Example 1.
Comparative example 2
Ni cladding micron graphite is replaced with micron graphite, remaining is same as Example 1.
The coating of comparative example 1-2, can equally play lubrication, but the lubricant effect is slightly worse, simply compared to not containing
The piston of coating, improves.The lubricant effect of embodiment 1 will be substantially better than comparative example 1-2, and wear time is long, play profit
The sliding time is also significantly longer.That is, 2 kinds of materials of the present invention mix, and play synergy.
Claims (5)
1. a kind of self-lubricating steam-cylinder piston, the piston face have the plasma spraying Ni cladding micron stone of 20-30 μ m thick
Ink and graphite ene coatings.
2. self-lubricating steam-cylinder piston as claimed in claim 1, it is characterised in that the coating is Ni cladding micron graphite and stone
Black ene coatings are mixed, and its weight ratio is (3-5):1, preferably 4:1.
3. self-lubricating steam-cylinder piston as claimed in claim 1 or 2, it is characterised in that characterized in that, the mixing is to adopt
Coating is dusted by planetary ball mill and centrifugal spraying granulator, and its technique includes：
(1) by Ni cladding micron graphite particle and Graphene ball milling at least 5 minutes on planetary ball mill；
(2), when ball milling stops first 5 minutes, organic binder ball milling is added, obtains suspension；
(3) suspension is carried out mist projection granulating, obtains Ni cladding micron graphite and Graphene agglomerated particle.
4. the self-lubricating steam-cylinder piston as described in one of claim 1-3, it is characterised in that by plasma spraying by the Ni
Cladding micron graphite is sprayed on blower fan main shaft with Graphene agglomerated particle and obtains the coating.
5. the self-lubricating steam-cylinder piston as described in one of claim 1-4, it is characterised in that the plasma spraying, its electric current
For 400-700A, voltage is 30-70V, main gas argon flow amount 50-140L/min, powder feed rate 25-60g/min；Preferably, electricity
Flow for 550A, voltage 30V, argon flow amount 50L/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610989123.1A CN106481478A (en) | 2016-11-10 | 2016-11-10 | A kind of self-lubricating steam-cylinder piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610989123.1A CN106481478A (en) | 2016-11-10 | 2016-11-10 | A kind of self-lubricating steam-cylinder piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106481478A true CN106481478A (en) | 2017-03-08 |
Family
ID=58271772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610989123.1A Pending CN106481478A (en) | 2016-11-10 | 2016-11-10 | A kind of self-lubricating steam-cylinder piston |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106481478A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107013359A (en) * | 2017-05-11 | 2017-08-04 | 湘潭大学 | A kind of piston and preparation method with compound texturing doping coating |
| CN112020604A (en) * | 2018-02-21 | 2020-12-01 | 天纳克有限责任公司 | Coating for reducing coke deposits on steel pistons |
| CN114623064A (en) * | 2022-03-09 | 2022-06-14 | 王汝君 | Parallel multi-cylinder star-like piston compressor |
Citations (6)
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|---|---|---|---|---|
| CN2523971Y (en) * | 2002-01-17 | 2002-12-04 | 石家庄金刚内燃机零部件集团有限公司 | Antifriction pistons |
| JP2008523292A (en) * | 2004-12-10 | 2008-07-03 | マーレ インターナショナル ゲゼルシャフト ミット ベシュレンクテル ハフツング | Piston for use in an internal combustion engine and method for coating a boss hole in the piston |
| CN103089479A (en) * | 2013-01-21 | 2013-05-08 | 南京理工大学 | Wear-resisting piston ring with hard-soft composite coating and textured surface and wear-resisting piston ring manufacture method |
| CN104388899A (en) * | 2014-12-10 | 2015-03-04 | 武汉大学 | Piston ring with MoN/Cr/CrN/Cr nano composite ultra-thick coating and preparation method of piston ring |
| CN104662199A (en) * | 2012-07-23 | 2015-05-27 | 艾默生环境优化技术有限公司 | Anti-wear coatings for compressor wear surfaces |
| EP3006605A1 (en) * | 2014-10-08 | 2016-04-13 | The Swatch Group Research and Development Ltd. | Self-lubricating composite coating |
-
2016
- 2016-11-10 CN CN201610989123.1A patent/CN106481478A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2523971Y (en) * | 2002-01-17 | 2002-12-04 | 石家庄金刚内燃机零部件集团有限公司 | Antifriction pistons |
| JP2008523292A (en) * | 2004-12-10 | 2008-07-03 | マーレ インターナショナル ゲゼルシャフト ミット ベシュレンクテル ハフツング | Piston for use in an internal combustion engine and method for coating a boss hole in the piston |
| CN104662199A (en) * | 2012-07-23 | 2015-05-27 | 艾默生环境优化技术有限公司 | Anti-wear coatings for compressor wear surfaces |
| CN103089479A (en) * | 2013-01-21 | 2013-05-08 | 南京理工大学 | Wear-resisting piston ring with hard-soft composite coating and textured surface and wear-resisting piston ring manufacture method |
| EP3006605A1 (en) * | 2014-10-08 | 2016-04-13 | The Swatch Group Research and Development Ltd. | Self-lubricating composite coating |
| CN104388899A (en) * | 2014-12-10 | 2015-03-04 | 武汉大学 | Piston ring with MoN/Cr/CrN/Cr nano composite ultra-thick coating and preparation method of piston ring |
Non-Patent Citations (1)
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| 赵世海: "微纳米材料涂层对提高冶金风机耐磨损性能的研究", 《万方学位论文》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107013359A (en) * | 2017-05-11 | 2017-08-04 | 湘潭大学 | A kind of piston and preparation method with compound texturing doping coating |
| CN112020604A (en) * | 2018-02-21 | 2020-12-01 | 天纳克有限责任公司 | Coating for reducing coke deposits on steel pistons |
| CN112020604B (en) * | 2018-02-21 | 2022-07-01 | 天纳克有限责任公司 | Coating for reducing coke deposits on steel pistons |
| US11719185B2 (en) | 2018-02-21 | 2023-08-08 | Tenneco Inc. | Coating to reduce coking deposits on steel pistons |
| CN114623064A (en) * | 2022-03-09 | 2022-06-14 | 王汝君 | Parallel multi-cylinder star-like piston compressor |
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Application publication date: 20170308 |
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