CN100549231C - Slide unit - Google Patents
Slide unit Download PDFInfo
- Publication number
- CN100549231C CN100549231C CNB200510083689XA CN200510083689A CN100549231C CN 100549231 C CN100549231 C CN 100549231C CN B200510083689X A CNB200510083689X A CN B200510083689XA CN 200510083689 A CN200510083689 A CN 200510083689A CN 100549231 C CN100549231 C CN 100549231C
- Authority
- CN
- China
- Prior art keywords
- film
- compound
- deck
- piston
- aluminum
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Chemical Treatment Of Metals (AREA)
Abstract
The invention provides a kind of slide unit of making by the base metals that comprises aluminum or aluminum alloy, wherein, the whole surface of described slide unit or its sliding surface plating one deck slip film, this slip film comprises: the film that one deck is made up of the compound of aluminium, fluorine and hydrogen-oxygen group, one deck is the film of the hydrate composition of compound thus, and one deck is by NH
4MgAlF
6The film that compound is formed, the perhaps film formed by the mixture of these compounds of one deck, and also this slip film has cubic crystal structure and does not have crystalline orientation.Preferred described slip film is that one deck contains NH
4MgAlF
6The film of compound.
Description
The application is priority date the dividing an application for the Chinese patent application 02107851.3 of " slide unit " that be on October 31st, 1997, denomination of invention.
Technical field
The present invention relates to have the slide unit of the surface treatment film that is used for aluminum or aluminum alloy.
Background technology
More specifically, the present invention relates to a kind of surface treatment method.This method required equipment is simple, and processing cost reduces, and can produce all excellent aluminum or aluminum alloy of wear resistance, erosion resistance and other performance; Also relate to according to this method and carry out the surface-treated piston.The invention still further relates to a kind of surface treatment film, this film is suitable for being used in oil engine sliding surface (or axle sleeve surface), and has excellent abrasive, initial conformability, oil retention and other performance, also relates to the slide unit that surface coverage has such one deck slip film.
It is a kind of anodizing of aluminium of carrying out in acid solution that the anodic alumina films that uses on the traditional method is handled, to form a kind of method of hard pellumina on the aluminium surface.But this method exists not enough, and it needs power-supply unit, and because the formation speed of film is low, this method cost is higher.
On the other hand, as the aluminium piston of E/G assembly, its lateral margin is coated with tin, though sedimentary tin film is soft, can help to produce good initial cooperation, can not look to it to have the effect that improves abrasion resistance properties.
Summary of the invention
In view of having the problems referred to above in the conventional surface treatment technology, the inventor has carried out intensive investigation, to develop a kind of surface treatment method, this method required equipment is simple, processing cost reduces, and can form the film of uniformity, and preparation is carried out the surface-treated slide unit with this method with excellent corrosion-resistant, wear-resistant and other performance.
The result, the inventor finds that the problems referred to above can solve with a kind of surface treatment method, this method is included in a kind of treatment solution floods aluminum or aluminum alloy, and described treatment solution contains the compound and the ammonium silicofluoride of fluorine, and the temperature range of treatment solution is 70-100 ℃ during the dipping aluminum or aluminum alloy.And found, the specific film of plating one deck also can address the above problem on the whole surface of a slide unit or its sliding surface, this film is made up of for example compound of a kind of aluminium, fluorine and hydrogen-oxygen group, perhaps form a kind of certain films and also can reach above-mentioned purpose on the surface of aluminum or aluminum alloy, this film is made up of the silicon particle that a kind of oxyhydroxide and disperse of aluminum fluoride is distributed in wherein.
In view of this, the present invention finishes.
Promptly, according to a first aspect of the invention, a kind of surface treatment method is provided, this method is included in dipping aluminum or aluminum alloy in a kind of treatment solution (or aqueous solution of a kind of heating), described solution contains the compound and the ammonium silicofluoride of fluorine, and floods aluminum or aluminum alloy in the treatment solution of 70-100 ℃ temperature range.In this surface treatment method, aforesaid treatment solution (or heating aqueous solution) preferably comprises compound of fluorine of 0.1-20 part (weight ratio) and the ammonium silicofluoride of 0.05-15 part (weight ratio), and the water of 100 parts (weight ratios).Term used herein " compound of fluorine " is meant and removes ammonium silicofluoride [(NH
4)
2SiF
6] in addition the compound of various fluorine.In the compound of these fluorine, preferably silicofluoride, more preferably magnesium silicofluoride (MgSiF
66H
2O).
It is a kind of according to the surface treated piston of above-mentioned surface treatment method that the present invention also provides.
According to a second aspect of the invention, provide a kind of piston, its coating surface one deck is by a kind of Al-OH-F compound or NH
4MgAlF
6Compound is formed, and perhaps by described two kinds of films that compound is formed, preferably to the whole surface of piston, comprises piston ring groove, piston boss, lateral margin, piston head and inner carrier surface, adopts aforesaid film to carry out plating.In this piston, the thickness of the film of being made up of a kind of Al-OH-F compound or similar substance is preferably 1-10 μ m.
According to a third aspect of the present invention, a kind of slide unit of being made by the metal mother metal that comprises aluminum or aluminum alloy is provided, wherein, the whole surface of described slide unit or its sliding surface plating one deck slip film, this film comprises: the film that one deck is made up of the compound of aluminium, fluorine and hydrogen-oxygen group, the film that one deck is made up of the hydrate of this compound, one deck is by NH
4MgAlF
6The film that compound is formed, the perhaps film formed by the mixture of these compounds of one deck, described slip film has cubic crystal structure and does not have crystalline orientation.And, a kind of slide unit also is provided, its whole surface or its sliding surface plating one deck slip film, the thickness of this film is 1-100 μ m, and the aggregate by the 1-100 μ m of many sizes is formed, and each aggregate then is to form by being of a size of 1 μ m or littler microcrystal.
According to a fourth aspect of the present invention, provide a kind of surface treatment film that is used for aluminium alloy, wherein, this film is the film that one deck is formed at the aluminum or aluminum alloy surface, by a kind of oxyhydroxide or NH of aluminum fluoride
4MgAlF
6Compound is formed, and perhaps is made up of described two kinds of compounds, and has the silicon particle dispersion to be distributed in wherein, and the content of the silicon particle that disperse distributes in the film is 1-24% (weight ratio), and preferred proportion is 6-24% (weight ratio); The content of silicon is 4-24% (weight ratio) in the aluminium alloy, and preferred proportion is 7-24% (weight ratio).
Description of drawings
Fig. 1 is the synoptic diagram according to piston of the present invention;
Fig. 2 is that the microcrystal of existence and the synoptic diagram of an aggregate are gone up in the metal mother metal surface (sliding surface) of handling according to the present invention;
Fig. 3 is a synoptic diagram of handling film according to aluminum alloy surface of the present invention;
What Fig. 4 represented is among the embodiment 1, viewed cut shape of cross section synoptic diagram after sample of handling according to the present invention (being processed into sample) and the sample (untreated sample) that does not have film to exist on the surface carry out ball-disc type wearing test;
Fig. 5 is the typical structure synoptic diagram on the surface that obtains according to surface treatment method of the present invention;
Fig. 6 is the X ray diffracting spectrum that is plated on one deck slip film on the slide unit according to the present invention;
Fig. 7 is the electron photomicrograph (20,000 times) that is plated on one deck slip film on the slide unit according to the present invention;
Fig. 8 is the electron photomicrograph (1000 times) of slip film shown in Fig. 7;
Fig. 9 is the light micrograph (400 times) of the section of slip film shown in Fig. 7;
That Figure 10 provides is the cut resistance test result who carries out among the embodiment 6.
The reference number implication that provides among these figure is as follows: 1. piston; 2. metal mother metal; 3. slip film; 4. annular groove; 5. lateral margin; 6. pin-and-hole; 7. microcrystal; 8. the aggregate of microcrystal; 9. silicon; 10. aluminium alloy; 11. surface treatment film.
Embodiment
At first, the surface treatment method to first aspect of the present invention is described as follows.
Surface treatment method of the present invention comprises: dipping aluminum or aluminum alloy in a kind of treatment solution (being a kind of aqueous solution of heating), and described treatment solution contains a kind of compound and ammonium silicofluoride of fluorine; In being 70-100 ℃ treatment solution, temperature range floods aluminum or aluminum alloy.
Used treatment solution contains a kind of compound and ammonium silicofluoride [(NH of fluorine among the present invention
4)
2SiF
6], term used herein " compound of fluorine " comprises the compound of the various fluorine except that ammonium silicofluoride.
Therefore, the compound that can be used for the fluorine in the treatment solution of the present invention comprises various fluorine-containing compounds, but except the ammonium silicofluoride.Its concrete example comprises silicofluoride, as magnesium silicofluoride (MgSiF
66H
2O), zine fluosilicate (ZnSiF
66H
2O), potassium silicofluoride (K
2SiF
6), Sodium Silicofluoride (Na
2SiF
6) and manganese fluosilicate (MSiF
66H
2O); Fluoroborate and fluorochemical are as Zirconium tetrafluoride and titanium oxide.In these fluorine-containing compounds, preferably silicofluoride, and especially preferred magnesium silicofluoride, manganese fluosilicate etc.
The treatment solution that uses among the present invention preferably comprises: 0.1-20 part, the more preferably compound of the described fluorine of 0.2-15 part (weight ratio); 0.05-15 part (weight ratio), more preferably the ammonium silicofluoride [(NH of 0.1-10 part
4)
2SiF
6]; The water of 100 parts (weight ratios).This treatment solution can form more even, the more corrosion resistant film of one deck in aluminum alloy surface.
If the amount of the compound of fluorine is lower than 0.1 part (weight ratio) in the used treatment solution of the present invention, or the ammonium silicofluoride amount is lower than 0.05 part (weight ratio), and reaction can be very slow, and the treatment time is too prolonged.
On the other hand, if the amount of the compound of fluorine is higher than 20 parts (weight ratios), or the amount of ammonium silicofluoride is higher than 15 parts (weight ratios), and the dissolving of these compounds will be very difficult.
Surface treatment method of the present invention can be used in aluminum or aluminum alloy.Its specific examples should comprise fine aluminium, calendering aluminium, cast aluminium and die casting aluminium.This surface treatment method can be used for various aluminiums, and wear-resistant, corrosion-resistant and other performance of the various aluminiums after this surface treatment all is improved.
The pollutent (as oil) that the pre-treatment for the treatment of the surface-treated material only needs to adhere to removes and gets final product.In any case, after material was carried out alkaline etching and pickling with sodium hydroxide or similar substance, it was better to carry out surface treatment.
According to surface treatment method of the present invention, treat that the surface-treated aluminum or aluminum alloy is immersed in the aforesaid treatment solution (or aqueous solution of heating).
The temperature of handling the treatment solution of aluminum or aluminum alloy is generally 70-100 ℃, and preferably 75-99 ℃, and more preferably 80-98 ℃.If the temperature of treatment solution is lower than 70 ℃, reaction is carried out slowly, and the treatment time is too prolonged.On the other hand, if the temperature of treatment solution is higher than 100 ℃, the evaporation meeting of treatment solution too increases.
As for the treatment time, as being purpose with the surface treatment, about 2 minutes of dipping is just enough in solution, because film formation reaction can be finished in about 1 minute.In case after will be appreciated that film forms, material flooded in treatment solution 30 minutes or longer again, did not have any problem, because film has provide protection.
The surface treatment film that above-mentioned surface treatment method forms on aluminium or analogous material according to the present invention has provide protection, thereby has improved the erosion resistance of aluminum mother plate.And the surface treatment film of Xing Chenging has excellent abrasive like this.
On the other hand, because surface treatment method of the present invention does not need power-supply unit, and equipment is simple, and this is very favorable from cost consideration.And, to compare with traditional process for treating surface, surface treatment method of the present invention is faster at aluminium or the film forming speed of analogous material surface shape, thereby its productivity is higher.
Secondly, according to a second aspect of the invention piston is described below:
Piston of the present invention is to carry out the surface-treated piston according to a kind of surface treatment method, and this surface treatment method comprises: a kind of treatment solution (or aqueous solution of a kind of heating) is provided, and it comprises a kind of compound (as a kind of silicofluoride) and ammonium silicofluoride of fluorine; In being 70-100 ℃ described treatment solution, temperature floods aluminum or aluminum alloy.In present method, aforementioned processing liquid preferably comprises: the compound of the fluorine of 0.1-20 part (weight ratio), the ammonium silicofluoride of 0.05-15 part (weight ratio) and the water of 100 parts (weight ratios).
According to above-mentioned surface treatment method, before forming film, need use cleanings such as organic solvent, grease-removing agent according to piston of the present invention.The present invention can be applicable on the piston of the various common engine made by aluminium alloy.
According to aforesaid surface treatment method, the engine piston after the cleaning is immersed in the described treatment solution.So, one deck is by Al-OH-F compound or NH
4MgAlF
6Compound is formed, or the film of being made up of described two kinds of compounds just forms at piston face.During this handled, when being made up of the Al-OH-F compound such as described film, the aluminium that has trace dissolved from the aluminum piston face.Fluorine root in this part aluminium and the solution and hydrogen-oxygen radical reaction form a kind of Al-OH-F compound, and this compound is deposited on piston face.Perhaps, when having magnesium to exist, deposition one deck NH on the piston face
4MgAlF
6Compound also can obtain the piston among the present invention, or at piston face while depositing Al-OH-F compound and NH
4MgAlF
6Compound is good.
As for the treatment time, piston floods in treatment solution just was enough to reach the surface-treated purpose in about 2 minutes, and the preferred time is the 3-10 branch, because similar with above-mentioned surface treatment method, film formation reaction can be finished in about 1 minute.Piston need be appreciated that, in case after film formed, can flood in treatment solution 30 minutes or be longer and do not have any problem, because this skim has provide protection.
According to the piston among the present invention that aforesaid way obtained, its coating surface has one deck by Al-OH-F compound or NH
4MgAlF
6Compound is formed, or by described two kinds of films that compound is formed, the result shows excellent surface property.The film that this layer is made up of Al-OH-F compound or similar substance no matter form at any position of piston, all can play beneficial effect, and these positions for example are piston ring grooves, piston boss, lateral margin surface, piston head and inner carrier surface.But should preferably comprise this film of plating on the whole piston face at these positions.
Be formed on the piston face, and by Al-OH-F compound or NH
4MgAlF
6Compound is formed, and perhaps the thickness of this laminar surface film of being made up of described two kinds of compounds is preferably 1-10 μ m.
Piston described in the present invention is soft as zinc-plated piston unlike traditional plating, and excellent abrasive and splendid weather resistance are but arranged.
Again the slide unit in the third aspect of the present invention being done one below describes:
Slide unit of the present invention is made by a metal mother metal, this metal mother metal comprises aluminum or aluminum alloy, plating one deck slip film on the whole surface of described slide unit or its sliding surface, this film comprises: the film that one deck is made up of the compound of aluminium, fluorine and hydrogen-oxygen group; The film that one deck is made up of the hydrate of this change thing; One deck is by NH
4MgAlF
6The film that compound is formed; Or the film formed by the mixture of these compounds of one deck, this slip film has cubic crystal structure and does not have crystalline orientation.In other words, the whole surface of slide unit or its sliding surface plating one deck slip film, this film thickness is 1-100 μ m and is that the aggregate of 1-100 μ m is formed by many sizes that each aggregate is that 1 μ m or littler microcrystal constitute by size.The hydrate specific examples of aforesaid Al-OH-F compound comprises: Al
2(OH)
2.76F
3.24H
2O and AlF
1.65(OH)
1.35XH
2O.Do to describe more specifically below in conjunction with 1 pair of this slide unit of accompanying drawing.
Referring to accompanying drawing 1, the piston 1 that uses in the oil engine is a slide unit, is to be made by a kind of metal mother metal that contains aluminium alloy.Coating surface one deck slip film 3 of metal mother metal is to improve its sliding properties.The lateral margin 5 of piston slides on the cylinder inner wall that constitutes the relatively sliding parts with it, and piston ring groove 4 nestles up piston ring and slides, and piston pin hole 6 slides with respect to wrist pin.
As example, a kind of Al-Si-Cu-Ni-Mg alloy or analogous material are as metal mother metal 2.The specific examples of described alloy comprises AC8A, AC8B, AC9A and AC9B.
Piston 1 is carried out chemical transformation handle, can on the surface of piston 1, form one deck slip film 3.This slip film 3 may comprise a film of being made up of the compound that contains aluminium, fluorine (F) and hydrogen-oxygen group (OH), or a film of being made up of the hydrate of this compound, and the form of hydrate is such as Al
2(OH)
2.76F
3.24H
2O or AlF
1.65(OH)
1.35XH
2O.In addition, slip film 3 may comprise one by NH
4MgAlF
6The film that compound is formed, perhaps one by aforesaid Al-OH-F compound or its hydrate, and NH
4MgAlF
6The film that the mixture that compound constituted is formed.Although the composition of slip film 3 can have above-mentioned variation, it has cubic crystal structure all the time, and does not have crystalline orientation.
This slip film 3 is that 1 μ m or littler microcrystal 7 are formed by size.These microcrystals 7 gather together, and forming many sizes is the aggregate 8 of 1-100 μ m, and these aggregates 8 cover metal mother metal surface, and thickness can reach 1-100 μ m (Fig. 2).This slip film just constitutes a new sliding surface.
The microcrystal 7 of formation slip film 3 and the surface-area that aggregate 8 causes slipping plane increase, thereby oil retention is improved.And, because aggregate 8 can preferentially be ground off, so sliding surface shows good initial conformability.These improvement of wearing character help to increase the weather resistance of slide unit, reduce friction, and improve fuel consumption.
At last, the surface treatment film in the 4th aspect of the present invention is described below:
Be one according to the surface treatment film of aluminium alloy of the present invention and be formed at the lip-deep film of aluminum or aluminum alloy, this film is by a kind of oxyhydroxide or NH of aluminum fluoride
4MgAlF
6Compound is formed, or form by described two kinds of compounds, the silicon particle dispersion is distributed in the film.And the silicon particle content that distributes in the described film is 1-24% (weight), preferred 6-24% (weight); And the silicone content in the aforementioned aluminium alloy is 4-24% (weight), preferred 7-24% (weight).
The membrane structure that obtains according to the present invention is shown in Fig. 3.Silicon (Si), eutectic Si or eutectic Si/ primary crystal Si disperse that the aluminium alloy of formation metal mother metal contains 4-24% are distributed in the aluminum substrate.The coating surface skim of aluminium alloy, this film is by a kind of oxyhydroxide or NH of aluminum fluoride
4MgAlF
6Compound is formed, perhaps constitute by described two kinds of compounds, with eutectic Si or eutectic Si/ primary crystal Si disperse be distributed in the aluminium alloy mother metal similar, the Si particle also in this film disperse distribute.
According to surface treatment film of the present invention, its said structure can obtain in the following way:
Utilize a kind of organic acid or a kind of commercially available washing composition, the aluminium alloy that contains 4-24% silicon (Si) is carried out skimming treatment, and then carry out alkaline etching and pickling.After this, just with described material soaking (as a kind of aqueous solution of heating of fluorine-containing Magnesium Silicate q-agent, its concentration is 0.1-20%) in temperature is 70-100 ℃ a kind of aqueous solution of silicofluoride, dipping time is about 30 seconds-Yue 5 minutes.
According to above-mentioned steps, be present in the aluminium preferential reaction and the dissolving of aluminum alloy surface.Simultaneously, dissolved aluminium for example, just with the fluorine root and the hydrogen-oxygen radical reaction that exist in the solution, forms a kind of oxyhydroxide of aluminum fluoride.When the oxyhydroxide of this aluminum fluoride is deposited on aluminium alloy surperficial, be in the same place, just form the layer of surface film with the silicon mix particles that is difficult to react with removing.Similarly, when having magnesium in alloy or analogous material, aluminum alloy surface will form one deck by NH
4MgAlF
6The film that compound is formed perhaps forms the film that the above-mentioned two kinds of compounds of one deck are formed in aluminum alloy surface.
Yet should be noted that: in the above-mentioned steps, degreasing, alkaline etching and pickling purpose are that material is cleaned up, and are not to obtain membrane structure institute direct requirement among the present invention.
Surface treatment method according to aluminum or aluminum alloy of the present invention can provide a kind of like this surface coating method, and promptly required equipment is simple, and processing cost reduces, and makes the aluminum or aluminum alloy of producing have excellent abrasive, erosion resistance and other performance.
That is to say that according to the present invention, because treatment condition are easy, equipment obtains simplifying, surface treated aluminium or analogous material have excellent abrasive and can reduce frictional dissipation.And, having protective value by the resulting film of method of the present invention, the result is in the whole surface range of aluminium or analogous material, and the consistency of thickness of film is and irrelevant with treatment condition, and promptly thickness does not almost have part inequality.And the film of Huo Deing has excellent solidity to corrosion like this, and even also wear-resisting in corrosive atmosphere.
And the method according to this invention is carried out the surface-treated piston and is had excellent corrosion-resistant, wear-resistant and other performance.Therefore, these pistons have splendid weather resistance, and can be effectively applied in the various engines.
Furthermore, the sliding properties (as wear resistance) and the weather resistance of engine, compressor etc. can be because of improving at sliding surface (or sleeve surface) the plating skim of its slide unit of being made by aluminum or aluminum alloy according to the present invention.For example, as engine piston is carried out surface treatment, its wear resistance then, initial conformability, oil retention and other performance all can be improved.This is to increasing weather resistance, reduces friction and to improve fuel consumption very effective, thereby, see from industrial point of view to have very important significance.
With reference to the following examples the present invention is done to explain that more specifically still, scope of the present invention is not limited only to these embodiment.
Embodiment 1
In the water of 100 parts (weight ratios), be dissolved with the magnesium silicofluoride (MgSiF of 0.67 part (weight ratio)
66H
2And the ammonium silicofluoride [(NH of 0.33 part (weight ratio) O),
4)
2SiF
6].The solution of being prepared is heated to 90 ℃, uses as treatment solution.
Diameter is 50mm, and the AC8A-T6 cast aluminium sample of thick 5mm is immersed in and carries out surface treatment in the above-mentioned treatment solution after cleaning with a kind of organic solvent and a kind of grease-removing agent.On the cast aluminium sample after the surface treatment, the film that one deck is made up of the Al-OH-F compound forms on its surface.
To the sample after the above-mentioned processing of the present invention, on ball-disc type wear testing machine, carry out wearing test, be through heat treated SCM435 to the mill material.The cross-sectional shape (or profile) of the cut that forms is shown among Fig. 4.Equally, also the sample (material is AC8A-T6) that the surface is not had a film has carried out ball-disc type wearing test.The cross-sectional shape of formed cut also is shown among Fig. 4.
As a result, according to above-mentioned surface treatment method the film formed sample of one deck is arranged on the surface, its volume wear only is 1/20 of the no film sample in surface.
And it is 0.09 that aforementioned surfaces has the frictional coefficient of film formed sample, and it is little more than 20% that this value wants specific surface not have the frictional coefficient of film sample.
After an engine piston (material is AC8A-T6) cleans with organic solvent and grease-removing agent etc., with embodiment 1 described identical treatment solution in flood surface treatment 5 minutes.Form the film that one deck is made up of the Al-OH-F compound at piston face.
Piston (being the piston of embodiment 2) after will handling according to surface treatment method of the present invention, and not surface treated piston (i.e. untreated piston) is installed in the engine.This engine is with the full load real-world operation.
After the running, take off each piston, and check its surface appearance.Inspection item comprises: aluminium is sold the cut on hub surface and the cut on lateral margin surface to the adhesion of ring.
Institute obtains and the results are shown in the table 1.
Table 1
| Piston among the |
Undressed piston | |
| Al is to the adhesion of ring | Do not have | Have |
| The cut on pin hub surface | Do not have | Have |
| The cut on lateral margin surface | Do not have | Have |
As a result, according to surface-treated piston of the present invention,, all improvement is arranged than untreated piston at aspects such as annular groove, pin hub and lateral margin surfaces.
Embodiment 3
By embodiment 1 same way as AC8A and ADC12 are carried out surface treatment.Then, by their erosion resistance of salt water projection test evaluation.
Can see that from the acquisition result surface treatment film among the present invention has provide protection; Surface treatment method among the present invention can improve the erosion resistance of aluminum mother plate.
To pressing embodiment 1 same way as surface-treated AC8A material (embodiment 4) and with hard pellumina surface-treated AC8A material (hard pellumina handle material), and untreated AC8A material (undressed material), tested their frictional coefficient under Oil Lubrication Condition respectively.To the mill material is SCM.
Obtain to the results are shown in the table 2.
Table 2
| | |
| Embodiment | |
| 4 | 0.09 |
| The material that hard pellumina is handled | 0.13 |
| Undressed material | 0.12 |
Can find out that from these results piston friction coefficient of the present invention is less.
The piston of being made by the base metals that comprises aluminium alloy (AC8A) 1 is given processing (referring to Fig. 1).This gives handling and comprises a step commonly used in the plating on aluminium alloy, and comprises following a few step:
Degreasing → alkaline etching → pickling
After this pre-treatment, piston 1 is carried out chemical transformation handle.The condition that this chemical transformation is handled is as follows:
Contain MgSiF in the treatment solution
66H
2O and (NH
4)
2SiF
6The mixture of two kinds of materials, the add-on of mixture are 20-50g/ liter, wherein MgSiF
66H
2O and (NH
4)
2SiF
6Add in 2: 1 ratios, the temperature of treatment solution is heated to 90 ℃.In case it is muddy that treatment solution becomes, piston flooded 5 minutes therein.
The result that this chemical transformation is handled is that one deck slip film 3 forms on the surface of piston 1.
Fig. 5 is the reference drawing of using during with X-ray diffraction spectrum analysis film of the present invention.Among this figure, the diffraction peak that aluminium and silicon produced in the base metals is removed from record data.
What Fig. 6 provided is the X-ray diffractogram that the piston 1 of slip film 3 is arranged.As can be known from Fig. 6, slip film 3 is by Al
2(OH)
2.76F
3.24H
2O, AlF
1.65(OH)
1.35XH
2O and NH
4MgAlF
6Form.Yet, in this X-ray diffractogram, both comprised the X-ray diffraction spectral line of slip film 3, have again in the aluminium that constitutes base metals and the mother metal siliceous diffract spectral line.And this X-ray diffractogram shows that there is not crystalline orientation in slip film 3.
As follows with the corresponding Miller of the diffraction peak a-j among Fig. 6 (Miller) index:
a(1，1，1)，b(3，1，1)，c(2，2，2)，d(4，0，0)，e(3，3，1)，f(4，4，0)，g(5，3，1)，h(6，2，0)，i(5，3，3)，j(6，2，2)。
Fig. 7 and Fig. 8 are the electron photomicrographs of the sliding surface 10 of slip film 3, and Fig. 2 is and the corresponding synoptic diagram of Fig. 7.Can be found out by Fig. 2 and Fig. 7: slip film 3 is made up of microcrystal 7, and these microcrystals form aggregate 8.And, can see that from Fig. 8 many aggregates 8 cover the surface of base metals 2, form one deck slip film 3.
Fig. 9 is the light micrograph of the transversal profile of the slip film 3 of formation on the metal mother metal 2, and described metal mother metal 2 comprises a kind of aluminium alloy (AC8A).Slip film 3 plating are in the mode on metal mother metal surface as seen from Figure 9.Shown in this photo, a part that is present in the silicon particle (Si) in the metal mother metal (AC8A) 2 is sneaked in the slip film 3.Its reason is that silicon particle contained among metal mother metal (AC8A) 2 is retained on the metal mother metal surface all the time, and sneaks in the slip film 3 that forms the treatment stage of chemical transformation.
After the different 6 kinds of aluminium alloy degreasings of silicon (Si) content, carry out alkaline etching and pickling again.Then, every kind of aluminium alloy all is immersed in the warmed-up silicofluoride aqueous solution that contains magnesium silicofluoride.Described aluminium alloy reacts in solution, and its surface is gone up and formed thin film, has the silicon particle in this process and sneaks in the described film.Like this, just prepare each sample of the different surface film plating of silicone content.
To these prepared samples, carry out the cut resistance test of described film at pin-disc type mill amount wear testing machine.The cut resistance test that reflects described membrane property the results are shown in Figure 10.
In the described test of Figure 10, be to carry out under Oil Lubrication Condition to the test of sample, each sample all is positioned on the dish, use through brinelling handle and tempered SCM420 steel pin as to the mill material.By volume the size of abrasion loss compares the test result of each sample.
Compare with the sample of not siliceous (Si) in the film, as can be known even only have an appointment 1% sample of silicone content, its wear resistance all improves to some extent, and silicone content be 6% or the wear resistance of higher sample have significantly and improve.
Claims (2)
1. slide unit of being made by the base metals that comprises aluminum or aluminum alloy, wherein, described slide unit has one deck and comprises NH
4MgAlF
6The slip film of compound, described film is formed by following surface treatment method, and this method is included in a kind of treatment solution floods aluminum or aluminum alloy, and described treatment solution contains magnesium silicofluoride MgSiF
66H
20 and ammonium silicofluoride, and, in being 70-100 ℃ treatment solution, temperature handles described aluminum or aluminum alloy.
2. according to the slide unit of claim 1, wherein, described treatment solution contains the magnesium silicofluoride MgSiF of 0.1-20 weight part
66H
2The ammonium silicofluoride of O and 0.5-15 weight part, and the water of 100 weight parts.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31636397 | 1997-10-31 | ||
| JP316363/1997 | 1997-10-31 | ||
| JP100320/1998 | 1998-03-27 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN02107851.3A Division CN1239743C (en) | 1997-10-31 | 1998-10-30 | Sliding component |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1733970A CN1733970A (en) | 2006-02-15 |
| CN100549231C true CN100549231C (en) | 2009-10-14 |
Family
ID=36076579
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200510083689XA Expired - Fee Related CN100549231C (en) | 1997-10-31 | 1998-10-30 | Slide unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100549231C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20140135205A (en) | 2012-03-21 | 2014-11-25 | 이데미쓰 고산 가부시키가이샤 | Lubricating oil composition for engine made of aluminum alloy and lubrication method |
| CN104099592A (en) * | 2014-06-19 | 2014-10-15 | 锐展(铜陵)科技有限公司 | Surface treating agent for smooth foamless aluminum alloy |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4273592A (en) * | 1979-12-26 | 1981-06-16 | Amchem Products, Inc. | Coating solution for metal surfaces |
| US4566960A (en) * | 1984-01-05 | 1986-01-28 | Hoechst Aktiengesellschaft | Process for electrochemical roughening of aluminum useful for printing plate supports, in an aqueous mixed electrolyte |
| US4650525A (en) * | 1984-04-10 | 1987-03-17 | Nihon Parkerizing Co., Ltd. | Surface treatment of aluminum and its alloys |
| US5125989A (en) * | 1989-04-21 | 1992-06-30 | Henkel Corporation | Method and composition for coating aluminum |
| US5584946A (en) * | 1993-05-24 | 1996-12-17 | Henkel Kommanditgesellschaft Auf Aktien | Chromium-free conversion coating treatment of aluminum |
| CN1239743C (en) * | 1997-10-31 | 2006-02-01 | 铃木株式会社 | Sliding component |
-
1998
- 1998-10-30 CN CNB200510083689XA patent/CN100549231C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4273592A (en) * | 1979-12-26 | 1981-06-16 | Amchem Products, Inc. | Coating solution for metal surfaces |
| US4566960A (en) * | 1984-01-05 | 1986-01-28 | Hoechst Aktiengesellschaft | Process for electrochemical roughening of aluminum useful for printing plate supports, in an aqueous mixed electrolyte |
| US4650525A (en) * | 1984-04-10 | 1987-03-17 | Nihon Parkerizing Co., Ltd. | Surface treatment of aluminum and its alloys |
| US5125989A (en) * | 1989-04-21 | 1992-06-30 | Henkel Corporation | Method and composition for coating aluminum |
| US5584946A (en) * | 1993-05-24 | 1996-12-17 | Henkel Kommanditgesellschaft Auf Aktien | Chromium-free conversion coating treatment of aluminum |
| CN1239743C (en) * | 1997-10-31 | 2006-02-01 | 铃木株式会社 | Sliding component |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1733970A (en) | 2006-02-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1188547C (en) | Surface treatment method, sliding member and piston | |
| JP2006517613A (en) | Pretreatment of aluminum and aluminum alloys | |
| US2868679A (en) | Process and compositions for producing aluminum surface conversion coatings | |
| AU604395B2 (en) | Process for phosphating metal surfaces | |
| US11999871B2 (en) | Titanium and magnesium compound for corrosion-resistant coatings | |
| EP3040447B1 (en) | Black coupling member for vehicles, having excellent corrosion resistance and black appearance | |
| CN100549231C (en) | Slide unit | |
| CN109402708A (en) | The preparation method of aluminium and aluminium alloy wear-proof self-lubricating coat in use | |
| US6569537B1 (en) | Surface treatment method sliding member and piston | |
| JP2004011026A (en) | Surface treatment method for aluminum or aluminum alloy | |
| CN100535186C (en) | Surface treatment solution for magnesium alloy material and technique for processing magnesium alloy material surface | |
| KR100317680B1 (en) | Surface treatment agent for treating aluminium alloy and steel plate simultaneously before painting | |
| US3437532A (en) | Dark colored stainless steel surfaces | |
| US2724668A (en) | Combination cleaning and coating solution for metallic surfaces and method of forming coatings therewith | |
| AU699822B2 (en) | Composition and process for forming an underpaint coating on metals | |
| JP2023514760A (en) | Protective coating for metal | |
| JPH05331658A (en) | Zinc phosphate treating method for metallic surface | |
| JP3832709B2 (en) | Aluminum or aluminum alloy piston, sliding member and aluminum alloy surface treatment film | |
| CN109504960A (en) | A kind of preprocess method of sheet metal component | |
| RU2207400C1 (en) | Method of application of protective coating to article from magnesium alloy | |
| CN113481495A (en) | Bolt surface blackening treatment liquid and blackening treatment method thereof | |
| CN1076225A (en) | black phosphating solution | |
| CN117987820A (en) | Passivating agent for die casting aluminum and aluminum alloy conversion film and preparation method thereof | |
| Leidheiser Jr et al. | Paint adhesion following deformation as related to the surface structure of hot-dipped galvanized steel | |
| Jones et al. | Factors Influencing the Corrosion Resistance of Decorative Plating on Zinc-Alloy Die Castings |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091014 Termination date: 20151030 |
|
| EXPY | Termination of patent right or utility model |