CN107587003A - A kind of helical form burr type aluminium alloy cylinder sleeve and preparation method thereof - Google Patents
A kind of helical form burr type aluminium alloy cylinder sleeve and preparation method thereof Download PDFInfo
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- CN107587003A CN107587003A CN201710613870.XA CN201710613870A CN107587003A CN 107587003 A CN107587003 A CN 107587003A CN 201710613870 A CN201710613870 A CN 201710613870A CN 107587003 A CN107587003 A CN 107587003A
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Abstract
The present invention discloses a kind of helical form burr type aluminium alloy cylinder sleeve, including liner body, and the liner body inner surface is coated with undercoating, and the internally coated surface roughness is at 80 ~ 120 μm, and thickness is in 0.2 ~ 0.4mm；The outer surface setting of the liner body is jagged, and burr is distributed in the shape of a spiral, and the burr height is in 0.1 ~ 0.5mm.Invention additionally discloses the method for preparing above-mentioned helical form burr type aluminium alloy cylinder sleeve.The present invention has the technique effect that snap-in force is good, service life is long, wearability is good.
Description
Technical field
The present invention relates to cylinder sleeve production field, more particularly to a kind of helical form burr type aluminium alloy cylinder sleeve and its preparation side
Method.
Background technology
Automobile engine be it is a kind of can be the heart of automobile the machine that can be converted into mechanical energy of other forms, shadow
Ring dynamic property, economy and the feature of environmental protection of automobile.Cylinder sleeve is engine A levels key zero as one of main fittings of engine
Part, its performance directly affect the technical requirements such as the dynamic property of engine, reliability, economy, discharge, noise.
At present, traditional cylinder sleeve production cost is higher, and running-in time length, snap-in force is poor, and service life is short, and is difficult to meet
Requirement of the high-performance energy saving environment protection engine for cylinder sleeve intensity and wearability and cost.For insulating ceramic cylinder sleeve, its interior table
Face coating silicon carbide, hard chrome plating, electric deposition nickel phosphorus alloy, thermal spraying antifriction alloy, case-carbonizing and laser transformation hardening etc.
Technology, but the most technical sophistication of these handling process, cost is high, and deformation is big, and yield rate and productivity ratio are low.
The content of the invention
In view of the deficiencies of the prior art, the present invention provides the helical form burr that snap-in force is good, service life is long, wearability is good
Type aluminium alloy cylinder sleeve and preparation method thereof.
The present invention realizes solve above-mentioned technical problem by following technological means：A kind of helical form burr type aluminium alloy cylinder
Set, including liner body, the liner body inner surface are coated with undercoating, and the internally coated surface roughness is 80 ~ 120
μm, thickness is in 0.2 ~ 0.4mm；The outer surface setting of the liner body is jagged, and burr is distributed in the shape of a spiral, and the burr is high
Degree is in 0.1 ~ 0.5mm.
Preferably：It is 5 ~ 6wt.%, Ti that the chemical composition of the liner body is counted including Si contents as following weight percent
Content is 7 ~ 8wt.%, and Fe contents are 0.3 ~ 0.4wt.%, and Mn contents are 0.6 ~ 0.8wt.%, and Pd contents are 0.05 ~ 0.07wt.%,
Sr contents are 2.3 ~ 2.6wt.%, and remaining is Al.
A kind of method for preparing above-mentioned helical form burr type aluminium alloy cylinder sleeve, first applied in the inwall of mould using releasing agent
One layer of overcoat is covered with, then molten iron is poured into cast iron smelting in mould into molten iron, using centre spinning casting,
After being cooled to room temperature, mould is broken into pieces the completion demoulding；Inner surface treatment is formed to the blank after the demoulding again, produces product.
Preferably, the preparation method of the releasing agent, by the palm wax of 26 ~ 30 parts by weight, the silicon tree of 12 ~ 16 parts by weight
Fat, the zinc stearate of 2.3 ~ 2.6 parts by weight, the sodium borohydride of 6.3 ~ 6.8 parts by weight, the vulcanization nickel by powder of 5.6 ~ 5.8 parts by weight
With the methanol of 80 ~ 85 parts by weight under the conditions of 95 ~ 100 DEG C heating stirring, be passed through nitrogen protection gas in whipping process, stirring 10 ~
Room temperature is cooled to after 15 minutes, then with high shear homogeneous emulsifying machine under conditions of 1000 ~ 3000r/min, 2 ~ 3h of emulsification is
The releasing agent can be obtained.
Preferably, the inner surface of cylinder liner processing comprises the following steps；
Step 1: first permeation
Cylinder sleeve is sent into salt bath after 300 ~ 350 DEG C of preheatings and carries out salt bath permeation processing, and salt temperature is 510 ~ 520 DEG C, salt
The mass concentration of cyanate radical is 30 ~ 40% in bath, permeation 90 ~ 100 minutes, is cleaned after salt bath permeation processing, after removing cylinder sleeve permeation
The salt and carbon on surface；
Step 2: secondary permeation
Inner surface of cylinder liner after being handled by step 1 uniformly smears one layer of diffusion medium, and cylinder sleeve then is placed in into lathe carrying roller
On, then by inside plasma torch nozzle insertion cylinder sleeve, cylinder sleeve makees System of Rotating about Fixed Axis motion, plasmatorch under the drive of flat idler
Nozzle does reciprocating linear motion, and scans helical form hardenability band in processed inner surface of cylinder liner, that is, completes secondary permeation process.
Preferably, the diffusion medium is by boron carbide powder, boron nitride powder, Graphene powder, potassium fluoborate, rare earth ferrosilicon alloy
Powder, machine oil are well mixed to be made.
Preferably, boron carbide powder, boron nitride powder, Graphene powder, potassium fluoborate, rare earth ferrosilicon alloy in the diffusion medium
Powder, the quality proportioning of machine oil are（33~36）:（56~60）:（3~3.5）:（1.1~1.3）:（5.8~6.3）:（120~130）.
Preferably, the rare earth ferrosilicon alloy powder by ferrosilicon, cerium, rare earth samarium, calcium, the pig iron according to mass ratio（39~
41）:（1.2~1.5）:（2.3~2.5）:（0.2~0.3）:（47~49）Ratio dispensing alloy be made through high-temperature fusion pass through powder again
It is broken to be made.
The advantage of the invention is that：
（1）Undercoating is attached to liner body inner surface, has higher hardness, can shorten the running-in time of cylinder sleeve, extends
The service life of cylinder sleeve.Undercoating thickness is in 0.2 ~ 0.5mm, it is possible to increase the bond strength with liner body, and possess foot
Enough anti-wear performances.
（2）Burr on liner body helps to lift the snap-in force between cylinder sleeve and cylinder body, and has preferable corrosion resistant
Erosion and anti-wear performance, while the bond strength with cylinder sleeve is ensured, help to obtain effective pyroconductivity.
（3）Burr arrangement form helical form, improve the contact area between cylinder sleeve and cylinder body, contact complexity, can more enter
Radial direction ability to bear is lifted to one step, prevents from departing from cylinder body during work.
（4）For cylinder sleeve after inner surface of cylinder liner processing method of the present invention processing, it has excellent anti-wear performance, phase
For traditional cylinder sleeve, its wearability improves 29.8% ~ 32.2%, and 24.7% ~ 26.3% is improved with auxiliary piston ring wearability.
（5）Hangnail is cast into by the outside in liner body, after follow-up cylinder body pours cast aluminium water, the cylinder sleeve and engine
Binding ability significantly improves, and the cylinder sleeve is peeled off with powerful external force, the cylindrical projection of the cylinder sleeve is remained in cylinder body, and also causing should
The heat conductivility of cylinder sleeve significantly improves.Using special releasing agent, not only cause burr to be not easy to be oxidized, do not influence the follow-up cylinder
The combination of set and engine, and the yield rate of the cylinder sleeve can reach 94%.
Brief description of the drawings
Fig. 1 is the stereogram of the helical form burr type aluminium alloy cylinder sleeve of the present invention.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
Part of the embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
Embodiment 1
As shown in figure 1, the present embodiment discloses a kind of helical form burr type aluminium alloy cylinder sleeve, a kind of helical form burr type aluminium alloy cylinder
Set, including liner body, the liner body inner surface are coated with undercoating 1, and the surface roughness of the undercoating 1 is in 80 μ
M, thickness is in 0.2mm；The outer surface of the liner body sets jagged 11, and burr 11 is distributed in the shape of a spiral, the burr 11
Height is in 0.1mm.
It is 5wt.% that the chemical composition of liner body is counted including Si contents as following weight percent, and Ti contents are 7wt.%,
Fe contents are 0.3wt.%, and Mn contents are 0.6wt.%, and Pd contents are 0.05wt.%, and Sr contents are 2.3wt.%, and remaining is Al.
Embodiment 2
As shown in figure 1, the present embodiment discloses a kind of helical form burr type aluminium alloy cylinder sleeve, including liner body, the cylinder sleeve sheet
Internal surface is coated with undercoating 1, and the surface roughness of the undercoating 1 is at 100 μm, and thickness is in 0.3mm；The liner body
Outer surface set jagged 11, burr 11 is distributed in the shape of a spiral, and the height of burr 11 is in 03mm.The chemical group of liner body
It is 5wt.% into meter includes Si contents as following weight percent, Ti contents are 7 ~ 8wt.%, and Fe contents are 0.35wt.%, Mn contents
For 0.7wt.%, Pd contents are 0.06wt.%, and Sr contents are 2.5wt.%, and remaining is Al.
Embodiment 3
As shown in figure 1, the present embodiment discloses a kind of helical form burr type aluminium alloy cylinder sleeve, including liner body, the cylinder sleeve sheet
Internal surface is coated with undercoating 1, and the surface roughness of the undercoating 1 is at 80 ~ 120 μm, and thickness is in 0.2 ~ 0.4mm；It is described
The outer surface of liner body sets jagged 11, and burr 11 is distributed in the shape of a spiral, and the height of burr 11 is in 0.1 ~ 0.5mm.
It is 6wt.% that the chemical composition of liner body is counted including Si contents as following weight percent, and Ti contents are 8wt.%,
Fe contents are 0.4wt.%, and Mn contents are 0.8wt.%, and Pd contents are 0.07wt.%, and Sr contents are 2.6wt.%, and remaining is Al.
Because undercoating of the present invention is attached to liner body inner surface, there is higher hardness, the mill of cylinder sleeve can be shortened
The time is closed, extends the service life of cylinder sleeve.Undercoating thickness is in 0.2 ~ 0.5mm, it is possible to increase and the combination of liner body is strong
Degree, and possess enough anti-wear performances.
Burr on liner body helps to be lifted the snap-in force between cylinder sleeve and cylinder body, and with it is preferably corrosion-resistant with
Anti-wear performance, while the bond strength with cylinder sleeve is ensured, help to obtain effective pyroconductivity.
Burr arrangement form helical form, improve the contact area between cylinder sleeve and cylinder body, contact complexity, can be further
Ground lifts radial direction ability to bear, prevents from departing from cylinder body during work.
Embodiment 4
The present embodiment discloses a kind of method for the helical form burr type aluminium alloy cylinder sleeve for preparing above-mentioned each embodiment, first in mould
Inwall be coated with one layer of overcoat using releasing agent, then cast iron smelting is poured into molten iron in mould into molten iron, using from
Heart casting casting, after being cooled to room temperature, break mould into pieces the completion demoulding；The blank after the demoulding is formed at inner surface again
Reason, produces product.Burr and liner body integrally casting shaping.
Embodiment 5
The present embodiment discloses a kind of method for the helical form burr type aluminium alloy cylinder sleeve for preparing above-mentioned each embodiment,
1）26Kg palm wax, 12Kg silicones, 2.3Kg zinc stearate, 6.3Kg sodium borohydride, 5.6Kg particle diameters is small
In 50 microns of vulcanization nickel by powder and 80Kg methanol under the conditions of 95 DEG C heating stirring, nitrogen protection is passed through in whipping process
Gas, stirring is cooled to room temperature after 10 minutes, and then with high shear homogeneous emulsifying machine under conditions of 1000r/min, emulsification 2h is
Releasing agent can be obtained.
2）, in the inwall of mould be coated with one layer of overcoat using releasing agent, then by cast iron smelting into molten iron, by molten iron
Pour into mould, using centre spinning casting, after being cooled to room temperature, break mould into pieces the completion demoulding, then to the demoulding after
Blank formed inner surface treatment, produce product.The yield rate of the cylinder sleeve is more than 92.6%.
Embodiment 6
The present embodiment discloses a kind of method for the helical form burr type aluminium alloy cylinder sleeve for preparing above-mentioned each embodiment,
1）, by 28Kg palm wax, 15Kg silicones, 2.5Kg zinc stearate, 6.5Kg sodium borohydride, 5.7Kg particle diameters
The methanol of vulcanization nickel by powder and 83Kg less than 50 microns heating stirring under the conditions of 99 DEG C, nitrogen protection is passed through in whipping process
Gas, stirring is cooled to room temperature after 12 minutes, then with high shear homogeneous emulsifying machine under conditions of 2000r/min, emulsifies 2.5h
Releasing agent can be obtained.
2）, in the inwall of mould be coated with one layer of overcoat using releasing agent, then by cast iron smelting into molten iron, by molten iron
Pour into mould, using centre spinning casting, after being cooled to room temperature, break mould into pieces the completion demoulding, then to the demoulding after
Blank formed inner surface treatment, produce product.The yield rate of the cylinder sleeve is more than 94.1%.
Embodiment 7
The present embodiment discloses a kind of method for the helical form burr type aluminium alloy cylinder sleeve for preparing above-mentioned each embodiment,
1）, by 30Kg palm wax, 16Kg silicones, 2.6Kg zinc stearate, 6.8Kg sodium borohydride, 5.8Kg particle diameters
The methanol of vulcanization nickel by powder and 85Kg less than 50 microns heating stirring under the conditions of 100 DEG C, nitrogen guarantor is passed through in whipping process
Gas is protected, stirring is cooled to room temperature after 15 minutes, then with high shear homogeneous emulsifying machine under conditions of 3000r/min, emulsifies 2h
Releasing agent can be obtained.
2）, in the inwall of mould be coated with one layer of overcoat using releasing agent, then by cast iron smelting into molten iron, by molten iron
Pour into mould, using centre spinning casting, after being cooled to room temperature, break mould into pieces the completion demoulding, then to the demoulding after
Blank formed inner surface treatment, produce product.The yield rate of the cylinder sleeve is more than 91.9%.
In the above-described embodiments, the inwall of mould is provided with the cloudy chamber being adapted with burr 11, when casting the cylinder sleeve,
Molten iron has been filled into cloudy chamber, and cooling forms burr 11.
Using centre spinning casting, because centrifugal motion makes molten iron radially can be full of casting mold well and formed
The Free Surface of casting so that the more easy-formation of burr 11, be mushroom with reference to burr 11, i.e. the head volume of burr 11 is big, no
But contribute to the exclusion of gas in molten iron, also make it that the structure of burr 11 is finer and close, the mechanical performance of burr 11 is more excellent.Due to
The presence of mushroom burr 11 so that for the cylinder sleeve after follow-up cylinder body pours cast aluminium water, the binding ability of the cylinder sleeve and engine is non-
Chang Hao, the cylinder sleeve is peeled off with powerful external force, the cylindrical projection of the cylinder sleeve is remained in cylinder body.Due to sophisticated cooling effect, hair
The presence of thorn 11 causes the heat conductivility of the cylinder sleeve to significantly improve.
The releasing agent being made up of palm wax, silicones, zinc stearate, sodium borohydride, vulcanization nickel by powder and methanol, the demoulding
Agent has more preferable finish and stability.Palm wax and silicones can improve abscess, have that distribution of cells is uniform, size is stable,
Release times are high, it is small to mold fouling the features such as.Zinc stearate is dispersant, and methanol is solvent, and sodium borohydride is reproducibility, boron
Sodium hydride can effectively reduce burr 11 and be oxidized degree；Vulcanization nickel by powder not only has excellent reducing property, de- making
During mould agent, the reason for protecting gas using nitrogen is to prevent that nickel sulfide is oxidized at high temperature, and nickel sulfide is also
With heated diminution, rear cooling expansion again, this makes the stress occurred in centrifugal casting process between burr 11 and liner body 1
A part can be buffered by overcoat, avoid the excessive generation micro-crack of stress, be favorably improved follow-up yield rate；Subsequently carrying out
The demoulding conflicts because in room temperature, nickel sulfide cooling expansion produces with other materials cooling meat so that burr 11 and mould it
Between overcoat form crackle, this helps to fall overcoat from the removing surface of burr 11, cylindrical is likely to produce due to whole
Raw casting flaw thus the waste product that produces can more, especially sharp burr is easily oxidized, along with remaining fireproof coating
Be embedded in and retain, influence subsequently and cylinder body combination, it is not influenceed the combination subsequently between cylinder body.
Embodiment 8
The method that the present embodiment discloses the blank inner surface treatment of the various embodiments described above
Step 1: first permeation
Cylinder sleeve is sent into salt bath after 300 ~ 350 DEG C of preheatings and carries out salt bath permeation processing, and salt temperature is 510 ~ 520 DEG C, salt
The mass concentration of cyanate radical is 30 ~ 40% in bath, permeation 90 ~ 100 minutes, is cleaned after salt bath permeation processing, after removing cylinder sleeve permeation
The salt and carbon on surface；
Step 2: secondary permeation
Inner surface of cylinder liner after being handled by step 1 uniformly smears one layer of diffusion medium, and cylinder sleeve then is placed in into lathe carrying roller
On, then by inside plasma torch nozzle insertion cylinder sleeve, cylinder sleeve makees System of Rotating about Fixed Axis motion, plasmatorch under the drive of flat idler
Nozzle does reciprocating linear motion, and scans helical form hardenability band in processed inner surface of cylinder liner, that is, completes secondary permeation process.
Wherein, the diffusion medium is less than 0.5 μ by boron carbide powder of the 33 parts by weight particle diameters less than 0.5 μm, 56 parts by weight particle diameters
The Graphene powder of m boron nitride powder, 3 parts by weight particle diameters less than 0.5 μm, potassium fluoborate, the 5.8 parts by weight particle diameters of 1.1 parts by weight
The machine oil of rare earth ferrosilicon alloy powder, 120 parts by weight less than 0.5 μm is well mixed to be made.The rare earth ferrosilicon alloy powder is by silicon
Iron, cerium, rare earth samarium, calcium, the pig iron are according to mass ratio 39:1.2:2.3:0.2:Conjunction is made through high-temperature fusion in 47 ratio dispensing
Gold is made by crushing again.
By NJ127-2001《Cylinder jacket, piston ring accelerated wear test method》Regulation, with not making just permeation and secondary
The same type cylinder sleeve of permeation processing compares：Cylinder sleeve by just permeation of the present invention and secondary permeation processing has excellent
Anti-wear performance, compared with not making the cylinder sleeve of first permeation and secondary permeation processing, its wearability improves 31.7%, with auxiliary piston ring
Wearability improves 26.3%.
Embodiment 9
The method that the present embodiment discloses the blank inner surface treatment of the various embodiments described above
Step 1: first permeation
Cylinder sleeve is sent into salt bath after 330 DEG C of preheatings and carries out salt bath permeation processing, and salt temperature is 515 DEG C, cyanic acid in salt bath
The mass concentration of root is 35%, permeation 95 minutes, is cleaned after salt bath permeation processing, removes the salt and carbon on surface after cylinder sleeve permeation；
Step 2: secondary permeation
Inner surface of cylinder liner after being handled by step 1 uniformly smears one layer of diffusion medium, and cylinder sleeve then is placed in into lathe carrying roller
On, then by inside plasma torch nozzle insertion cylinder sleeve, cylinder sleeve makees System of Rotating about Fixed Axis motion, plasmatorch under the drive of flat idler
Nozzle does reciprocating linear motion, and scans helical form hardenability band in processed inner surface of cylinder liner, that is, completes secondary permeation process.
Wherein, the diffusion medium is less than 0.5 μ by boron carbide powder of the 35 parts by weight particle diameters less than 0.5 μm, 58 parts by weight particle diameters
The Graphene powder of m boron nitride powder, 3.3 parts by weight particle diameters less than 0.5 μm, potassium fluoborate, the 6 parts by weight particle diameters of 1.2 parts by weight
The machine oil of rare earth ferrosilicon alloy powder, 125 parts by weight less than 0.5 μm is well mixed to be made.The rare earth ferrosilicon alloy powder is by silicon
Iron, cerium, rare earth samarium, calcium, the pig iron are according to mass ratio 40:1.3:2.4:0.3:Conjunction is made through high-temperature fusion in 49 ratio dispensing
Gold is made by crushing again.
By NJ127-2001《Cylinder jacket, piston ring accelerated wear test method》Regulation, with not making just permeation and secondary
The same type cylinder sleeve of permeation processing compares：Cylinder sleeve by just permeation of the present invention and secondary permeation processing has excellent
Anti-wear performance, compared with not making the cylinder sleeve of first permeation and secondary permeation processing, its wearability improves 32.2%, with auxiliary piston ring
Wearability improves 24.9%.
Embodiment 10
The method that the present embodiment discloses the blank inner surface treatment of the various embodiments described above
Step 1: first permeation
Cylinder sleeve is sent into salt bath after 350 DEG C of preheatings and carries out salt bath permeation processing, and salt temperature is 520 DEG C, cyanic acid in salt bath
The mass concentration of root is 40%, permeation 100 minutes, is cleaned after salt bath permeation processing, removes the salt and carbon on surface after cylinder sleeve permeation；
Step 2: secondary permeation
Inner surface of cylinder liner after being handled by step 1 uniformly smears one layer of diffusion medium, and cylinder sleeve then is placed in into lathe carrying roller
On, then by inside plasma torch nozzle insertion cylinder sleeve, cylinder sleeve makees System of Rotating about Fixed Axis motion, plasmatorch under the drive of flat idler
Nozzle does reciprocating linear motion, and scans helical form hardenability band in processed inner surface of cylinder liner, that is, completes secondary permeation process.
Wherein, the diffusion medium is less than 0.5 μ by boron carbide powder of the 36 parts by weight particle diameters less than 0.5 μm, 60 parts by weight particle diameters
The Graphene powder of m boron nitride powder, 3.5 parts by weight particle diameters less than 0.5 μm, potassium fluoborate, the 6.3 parts by weight grains of 1.3 parts by weight
Rare earth ferrosilicon alloy powder of the footpath less than 0.5 μm, the machine oil of 130 parts by weight are well mixed and are made.The rare earth ferrosilicon alloy powder by
Ferrosilicon, cerium, rare earth samarium, calcium, the pig iron are according to mass ratio 41:1.5:2.5:0.3:49 ratio dispensing is made through high-temperature fusion
Alloy is made by crushing again.
By NJ127-2001《Cylinder jacket, piston ring accelerated wear test method》Regulation, with not making just permeation and secondary
The same type cylinder sleeve of permeation processing compares：Cylinder sleeve by just permeation of the present invention and secondary permeation processing has excellent
Anti-wear performance, compared with not making the cylinder sleeve of first permeation and secondary permeation processing, its wearability improves 29.8%, with auxiliary piston ring
Wearability improves 24.7%.
In the above-described embodiments, cylinder sleeve passes through carries out just permeation processing in salt bath, relative to common salt bath permeation
Processing, salt temperature of the invention reduces 20 ~ 50 DEG C, while the salt and carbon on surface after removing cylinder sleeve permeation, to cylinder sleeve
Inner surface tentatively hardened.Then and the inner surface that tentatively hardens on the basis of, then utilize using diffusion medium
Plasma flare carries out secondary permeation, and this not only causes the work that the raising of hardenability band hardness, structure refinement, multicomponent thermochemical treatment are strengthened
With while being also due to a large amount of graphenes in hardenability band, graphene is the material for the maximum intensity being currently known, while its pole
High intensity and pliability, at room temperature best electrical and thermal conductivity cause graphene while with self-lubricating function, not shadow
The wearability of hardenability band is rung, so as to improve the service life of cylinder sleeve.
In diffusion medium, boron carbide powder and boron nitride powder are boron supplying agent, and boron carbide has that density is low, intensity is big, high temperature
The characteristics of stability and good chemical stability.Boron nitride has good thermal conductivity, is a kind of superhard material, contributes to follow-up
Improve the wearability of hardenability band.Potassium fluoborate is activator, and rare earth ferrosilicon alloy powder is reducing agent, in rare earth ferrosilicon alloy powder
In, cerium and rare earth samarium have a performance for preventing thermal fission and improving institutional framework, cerium also serve as in itself reducing agent and
Catalyst, improve the heat resistance of hardenability band.Rare earth samarium easily with nonmetalloid chemical combination, promotes in hardenability band combination inner surface of cylinder liner
Nonmetalloid, promote hardenability band be molded and combined with inner surface of cylinder liner.
It should be noted that herein, if being used merely in the presence of first and second or the like relational terms by one
Individual entity or operation make a distinction with another entity or operation, and not necessarily require or imply these entities or operate it
Between any this actual relation or order be present.Moreover, term " comprising ", "comprising" or its any other variant are intended to
Cover including for nonexcludability, so that process, method, article or equipment including a series of elements not only include those
Key element, but also the other element including being not expressly set out, or also include for this process, method, article or set
Standby intrinsic key element.In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that
Other identical element in the process including the key element, method, article or equipment also be present.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to the foregoing embodiments
The present invention is described in detail, it will be understood by those within the art that：It still can be to foregoing each implementation
Technical scheme described in example is modified, or carries out equivalent substitution to which part technical characteristic；And these modification or
Replace, the essence of appropriate technical solution is departed from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (8)
1. a kind of helical form burr type aluminium alloy cylinder sleeve, including liner body, the liner body inner surface are coated with undercoating,
Characterized in that, the internally coated surface roughness, at 80 ~ 120 μm, thickness is in 0.2 ~ 0.4mm；Outside the liner body
Surface setting is jagged, and burr is distributed in the shape of a spiral, and the burr height is in 0.1 ~ 0.5mm.
2. helical form burr type aluminium alloy cylinder sleeve according to claim 1, it is characterised in that the chemistry of the liner body
Meter includes Si contents to composition as following weight percent is 5 ~ 6wt.%, and Ti contents are 7 ~ 8wt.%, Fe contents for 0.3 ~
0.4wt.%, Mn content are 0.6 ~ 0.8wt.%, and Pd contents are 0.05 ~ 0.07wt.%, and Sr contents are 2.3 ~ 2.6wt.%, and remaining is
Al。
A kind of 3. method for preparing helical form burr type aluminium alloy cylinder sleeve as claimed in claim 1 or 2, it is characterised in that first
One layer of overcoat is coated with using releasing agent in the inwall of mould, then molten iron is poured into cast iron smelting in mould into molten iron,
Using centre spinning casting, after being cooled to room temperature, mould is broken into pieces the completion demoulding；In the blank after the demoulding is formed again
Surface treatment, produces product.
4. the method for helical form burr type aluminium alloy cylinder sleeve is prepared as claimed in claim 3, it is characterised in that the releasing agent
Preparation method, by the palm wax of 26 ~ 30 parts by weight, the silicones of 12 ~ 16 parts by weight, 2.3 ~ 2.6 parts by weight zinc stearate,
The methanol of the sodium borohydride of 6.3 ~ 6.8 parts by weight, the vulcanization nickel by powder of 5.6 ~ 5.8 parts by weight and 80 ~ 85 parts by weight is 95 ~ 100
Heating stirring under the conditions of DEG C, nitrogen protection gas is passed through in whipping process, stirring is cooled to room temperature after 10 ~ 15 minutes, then with height
Homogeneous emulsifying machine is sheared under conditions of 1000 ~ 3000r/min, 2 ~ 3h of emulsification can obtain the releasing agent.
5. the method for helical form burr type aluminium alloy cylinder sleeve is prepared as claimed in claim 3, it is characterised in that in the cylinder sleeve
Surface treatment comprises the following steps；
Step 1: first permeation
Cylinder sleeve is sent into salt bath after 300 ~ 350 DEG C of preheatings and carries out salt bath permeation processing, and salt temperature is 510 ~ 520 DEG C, salt
The mass concentration of cyanate radical is 30 ~ 40% in bath, permeation 90 ~ 100 minutes, is cleaned after salt bath permeation processing, after removing cylinder sleeve permeation
The salt and carbon on surface；
Step 2: secondary permeation
Inner surface of cylinder liner after being handled by step 1 uniformly smears one layer of diffusion medium, and cylinder sleeve then is placed in into lathe carrying roller
On, then by inside plasma torch nozzle insertion cylinder sleeve, cylinder sleeve makees System of Rotating about Fixed Axis motion, plasmatorch under the drive of flat idler
Nozzle does reciprocating linear motion, and scans helical form hardenability band in processed inner surface of cylinder liner, that is, completes secondary permeation process.
6. the method for helical form burr type aluminium alloy cylinder sleeve is prepared as claimed in claim 5, it is characterised in that the diffusion medium
It is well mixed and is made by boron carbide powder, boron nitride powder, Graphene powder, potassium fluoborate, rare earth ferrosilicon alloy powder, machine oil.
7. the method for helical form burr type aluminium alloy cylinder sleeve is prepared as claimed in claim 5, it is characterised in that the diffusion medium
Middle boron carbide powder, boron nitride powder, Graphene powder, potassium fluoborate, rare earth ferrosilicon alloy powder, the quality proportioning of machine oil are（33~36）:
（56~60）:（3~3.5）:（1.1~1.3）:（5.8~6.3）:（120~130）.
8. the method for helical form burr type aluminium alloy cylinder sleeve is prepared as claimed in claim 5, it is characterised in that the rare earth silicon
Iron alloy powder is by ferrosilicon, cerium, rare earth samarium, calcium, the pig iron according to mass ratio（39~41）:（1.2~1.5）:（2.3~2.5）:
（0.2~0.3）:（47~49）Ratio dispensing alloy be made through high-temperature fusion be made again by crushing.
Priority Applications (1)
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| CN112247397A (en) * | 2020-11-02 | 2021-01-22 | 合肥邦诺科技有限公司 | Composite brazing filler metal for brazing aluminum nitride ceramic and metal and preparation method thereof |
| CN113685285A (en) * | 2021-08-26 | 2021-11-23 | 中原内配集团安徽有限责任公司 | Cast-in cylinder sleeve with middle milled hole |
| CN113719373A (en) * | 2021-08-11 | 2021-11-30 | 中原内配集团安徽有限责任公司 | Lightweight cylinder sleeve and preparation process thereof |
| CN115558887A (en) * | 2022-09-16 | 2023-01-03 | 浙江海马传动科技股份有限公司 | Copper-steel composite sleeve and preparation method thereof |
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