CN105414546A - Light wear-resisting automobile engine cylinder sleeve and preparation method thereof - Google Patents
Light wear-resisting automobile engine cylinder sleeve and preparation method thereof Download PDFInfo
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- CN105414546A CN105414546A CN201510844488.0A CN201510844488A CN105414546A CN 105414546 A CN105414546 A CN 105414546A CN 201510844488 A CN201510844488 A CN 201510844488A CN 105414546 A CN105414546 A CN 105414546A
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Abstract
The invention relates to a light wear-resisting automobile engine cylinder sleeve, and belongs to the technical field of machining of automobile engine cylinder sleeves. The cylinder sleeve is made of porous beryllium-copper alloy ceramic. The inner wall of the cylinder sleeve is coated with a wear-resisting heat conduction layer. The porous beryllium-copper alloy ceramic is prepared from beryllium-copper alloy powder, ceramic powder, a pore-foaming agent and resinoid bond with the mass ratio of 100:(60.0-136.2):(0.7-1.2):(9-12). The cylinder sleeve is excellent in mechanical performance and good in sound absorption and shock absorption performance.
Description
Technical field
The invention belongs to car engine mantle cylinder processing technique field, relate to a kind of lightweight wear resistant automobile cylinder sleeve of engine and preparation method thereof.
Background technology
Along with the development of world industry, explosive motor has been applied to each large production field, present engine production technology is very ripe, but the engine worked under a part of adverse circumstances still there will be the phenomenon of scuffing of cylinder bore, occur the situation that scuffing of cylinder bore is such, reason is because the heat of cylinder sleeve does not distribute in time greatly, traditional cylinder jacket material is single, work in the presence of a harsh environment, its heat-transfer capability can not reach requirement, is therefore badly in need of a kind of new technology and solves above-mentioned technological deficiency.
At present, engine for automobile generally adopts beallon cylinder block.In order to the wearability of cylinder jacket can be ensured while reducing complete machine weight, be typically employed in the cylinder liner construction that precasting in cylinder block is made of cast iron.Existing cylinder jacket outer surface generally adopts machining to form the form of groove 10 or casting mushroom hangnail 20 to ensure combining closely between cast iron cylinder cover and cast aluminium cylinder block, comes off from cylinder block to prevent cylinder jacket.But, adopt the mode of machining grooves will waste a large amount of metals, and indeformable in order to ensure to add man-hour cylinder jacket, and it is very thick that cylinder jacket will be done, and is unfavorable for lightweight and the miniaturization of engine; Adopt the cylinder jacket of mushroom hangnail form due to cannot the problem such as withdrawing pattern, cannot adopt traditional casting technique, casting difficulty be comparatively large, and cost is higher.
Summary of the invention
The object of the invention is the problems referred to above existed for prior art, propose the lightweight wear resistant automobile cylinder sleeve of engine of a kind of good mechanical performance, sound-absorbing, vibration damping.
Object of the present invention realizes by following technical proposal: a kind of lightweight wear resistant automobile cylinder sleeve of engine, described cylinder sleeve is made up of porous beallon pottery, be coated with the wear-resisting heat-conducting layer of one deck at the inwall of cover cylinder, it is 100:(60.0-136.2 that described porous beallon pottery comprises mass ratio): (0.7-1.2): the beallon powder of (9-12), ceramic powder, pore-foaming agent and resinoid bond.
Car engine mantle cylinder operationally will bear high temperature, high pressure and very large frictional force, especially overlaps the inside wall of cylinder, therefore requires that car engine mantle cylinder will have enough mechanical strengths, rigidity and high-temperature behavior.Car engine mantle cylinder of the present invention adopts porous beallon pottery to make, and under pore-foaming agent effect, the inner disperse of porous beallon pottery generates a large amount of self-existent closed pore hole.The hardness that beallon is higher and excellent heat conductivility, can make cover cylinder have comparatively ideal anti-high pressure ability at work.The advantage of the comprehensive porous ceramics of porous beallon pottery and porous beallon, there is high rigidity, high strength that general material can not compare, resistance to wear, antiacid alkali, the performance such as high temperature resistant, shock-resistant, have that proportion is little simultaneously, absorbing and the feature such as sound absorption qualities is good, and its surface light knot degree can be made to reach necessary requirement by Grain size controlling.But the heat conductivility of porous material is generally poor, in order to increase thermal conductivity and the wearability of the cover inside wall of cylinder further, the present invention is coated with the wear-resisting heat-conducting layer of one deck at the cover inside wall of cylinder.Therefore car engine mantle cylinder of the present invention has very high strength and stiffness, and total quality is little, significantly can reduce vibrations when overlapping cylinder working and noise, and have very strong corrosion resistance and wearability, have excellent mechanical property and serviceability.
As preferably, the porosity of described porous beallon pottery is 50.0-68.5%, and aperture is 10.5-19.0 μm.
The porosity of porous beallon pottery and pore size determine the final mechanical property of product and mechanical performance, in the scope in above-mentioned porosity and aperture, the combination property of porous beallon pottery reaches optimum, has best performance and the minimum density such as hardness, intensity, shock resistance.
As preferably, the particle diameter of described beallon powder is 3-12 μm, and the particle diameter of ceramic powder is 30-70nm.
The pore size of porous beallon pottery and pore characteristic depend primarily on preparation technology and material powder particle diameter, in order to obtain overall good mechanical performance, proportion porous beallon that is less, good heat conductivity is ceramic, and the particle diameter of beallon powder and ceramic powder is limited in above-mentioned scope by the present invention.The particle diameter of material powder is less, and activity is higher, more easily sinters.In the particle size range of above-mentioned beallon powder and ceramic powder, the pore-foaming agent be distributed in closely knit beallon ceramic matrix produces and decomposes, and the gas of release causes compacts to expand, forms the beallon with fine and closely woven even porous structure ceramic.
As preferably, described beallon powder is made up of the component of following mass percent: 2.0-2.3%Be, 0.30-0.45%Co, 0.5-0.65%Si, 2.3-3.0%Ni, 0.3-0.5%Mg, 0.2-0.5%RE, and surplus is Cu.
The content of the Be in beallon powder of the present invention is higher, and adds the Ni element of 2.3-3.0%, and Ni and Be can form NiBe compound.The decline of the solubility with temperature of NiBe compound in Cu and reducing, therefore in cooling procedure, NiBe compound is from the precipitation tissue, along with the increase of Ni constituent content, the NiBe compound amounts of separating out increases, and can improve alloy strengthening effect, improves alloy rigidity.The rare earth element added and Mg element, have purification crystal boundary, improves the effect of electric conductivity and crystal grain thinning, be conducive to the raising that improve toughness of material.
As preferably, described ceramic powder is β-SiC-HBN composite granule, and comprising mass ratio is 100:(42.8-57.1) β-SiC and HBN.
β-SiC and HBN all has heat-resisting, wear-resisting, corrosion-resistant, the feature such as good heat conductivity and low-expansion coefficient, and the thermal stress be subject in heating and cooling process is very little; And all there is lower proportion, β-SiC-HBN composite granule with fine grained be uniformly distributed in mutually beallon mutually in, beallon with continuous print filminess exist, ceramic particle is surrounded.Because β-SiC and the thermal coefficient of expansion of HBN exist certain difference, cause HBN crystal grain generation intracrystalline delamination effect, many micropores are produced in β-SiC-HBN compound phase, the existence of these micropores effectively can alleviate the thermal expansion because high temperature causes, and thus significantly improves the thermal shock resistance of material monolithic.Therefore the cover cylinder using β-SiC-HBN composite granule and beallon compound to prepare has good thermal shock resistance, and has good heat conductivility.
As preferably, the preparation method of described β-SiC-HBN composite granule is: be 1 by mol ratio: the H of (2-3)
3bO
3, CO (NH
2)
2be dissolved in absolute ethyl alcohol, stir, add the β-SiC of 60-80%w/w, the obtained β-SiC-HBN composite granule of reaction in 800-840 DEG C of nitrogen.
As preferably, described pore-foaming agent is the mixture of pore-foaming agent I, pore-foaming agent II and pore-foaming agent III, and the content of pore-foaming agent I accounts for the 10-15% of mixture gross mass, and the content of pore-foaming agent II accounts for the 35-55% of mixture gross mass, and surplus is pore-foaming agent III.Described pore-foaming agent I is TiH
2, ZrH
2, NiH
2in one or more, pore-foaming agent II is SrCO
3, CaCO
3, MgCO
3, CaMg (CO
3)
2in one or more, pore-foaming agent III is Celogen Az.
The present invention by the pore-foaming agent of different in kind with the use of, wherein, pore-foaming agent I, pore-foaming agent II are heat absorbing type pore-foaming agent, pore-foaming agent III is exothermicity pore-foaming agent, mixing can offset its impact on porous beallon pottery pore process, and make pore homoepitaxial, pore-foaming agent I, pore-foaming agent II are different with the reaction temperature of pore-foaming agent III, can, at the different time continuous uniform release gas of sintering, make generation hole even and fine and close.
As preferably, the SiC layer that the external sheath of described pore-foaming agent has one deck network-like.
Gas is released because pore-foaming agent just starts reaction when 300-400 DEG C, at the higher temperature that sintering is used little meeting vigorous reaction, the a large amount of gas of release in short time, formed hole is caused to be difficult to reach satisfied effect, affect the performance of final products, therefore the present invention's SiC layer of having one deck network-like at the external sheath of pore-foaming agent, the high temperature resistant property of SiC is better, pore-foaming agent slow releasing gas can be made, make porous beallon pottery obtain homogeneous fine and closely woven hole.
As preferably, described wear-resisting heat-conducting layer is SiC/Si
3n
4composite ceramic layer, this ceramic layer is made up of the component of following mass percent: 3.0-6.1%C, 25-35%N, 3.0-3.5%Cu, 5-7.5%Fe, 1.0-1.5%Y, 0.8-1.2%Ce, and surplus is Si.
Car engine mantle cylinder operationally its inwall will bear high temperature, high pressure and very large frictional force, and the inefficacy of part is often from surface, and therefore the present invention arranges the wear-resisting heat-conducting layer of one deck at the cover inside wall of cylinder.SiC and Si
3n
4all there is excellent wearability and mechanical strength, and good thermal conductivity and heat endurance, fusing point is high, stable chemical nature, and Si
3n
4there is excellent thermal shock resistance.SiC/Si
3n
4composite ceramics is because ultra-fine SiC particle dispersion is at Si
3n
4crystal boundary or intracrystalline, met with stresses by dispersed granules SiC, produces micro-crack, stops dislocation motion or produce pinning effect and toughness reinforcing Si
3n
4, make SiC/Si
3n
4composite ceramics has excellent toughness.Meanwhile, due to SiC and Si
3n
4thermal coefficient of expansion there are differences, be distributed in Si
3n
4siC particle in crystal grain and Si
3n
4between there is residual stress after sintering, when material stand under load produce intracrystalline destroy, cause transgranular fracture, thus improve the strength of materials.The interpolation of Cu and Fe, reduces the apparent porosity of ceramic layer, adds the bulk density of ceramic layer, thus adds its thermal conductivity, and intensity, toughness and impact resistance.Within the scope of above-mentioned mass percent, along with the increase of Cu and Fe quality, the apparent porosity of ceramic layer increases gradually, and bulk density increases gradually, and thermal conductivity also increases thereupon, and has good intensity, toughness and impact resistance.Because part Cu can penetrate in porous beallon pottery under high temperature action, the Si in Fe and beallon has good adhesion, so the interpolation of Cu and Fe makes ceramic layer and porous beallon pottery have larger interface binding power.Fe and Si added
3n
4form Fe-Si
3n
4phase, appropriate Fe plays catalytic action because first the existence of micro amount of oxygen in nitrogen is oxidized into FeO, accelerates the nitridation reaction of Si.But too much Fe can generate Fe with Si
3si, Fe
5si
3and FeS, and Fe
3si, Fe
5si
3and FeSi all nitrogenize can not generate Fe-Si completely under the existence of nitrogen
3n
4, thus hinder the nitrogenize of Si, cause the decline of ceramic layer performance.
Present invention also offers a kind of preparation method of lightweight wear resistant automobile cylinder sleeve of engine, the step of described preparation method is as follows:
S1, beallon powder, ceramic powder, pore-foaming agent and resinoid bond to be mixed in proportion, then make cylinder sleeve green compact at 800-1000Mpa pressure;
S2, in Si powder, carbon powder, Cu powder and Fe powder, add Y
2o
3ceramic original washing powder is made in powder and resinoid bond mixing, and the ceramic original washing powder after mixing is coated in inboard wall of cylinder liner, in 800-1000Mpa pressure system;
S3, by the cylinder sleeve green compact in step S2 first at 250-350Mpa pressure, 500-600 DEG C, N
2pre-burning 30-40min under environment; Then at 350-500Mpa pressure, N
2be warming up to 800 DEG C, 1000 DEG C, 1100 DEG C, 1150 DEG C, 1200 DEG C with the speed of 5 DEG C/min under environment, heat preservation sintering 30min, 30min, 50min, 110min, 80min, be cooled to room temperature subsequently and obtain the ripe base of cylinder sleeve that inwall has wear-resisting heat-conducting layer respectively;
S4, further heat treatment is carried out to the wear-resisting heat-conducting layer in step S3, obtain lightweight wear resistant automobile cylinder sleeve of engine.
The present invention selects the method for hot pressing to sinter.Hot pressed sintering contributes to contact and the mass transport process such as diffusion, flowing of powder particle, reduce sintering temperature and shorten sintering time, because powder is in hot plastic state during hot pressing, deformation resistance is little, be easy to Plastic Flow, contribute to improving material compactness, refinement ceramic crystalline grain, improve bending strength and the fracture toughness of material.Cover cylinder and wear-resisting heat-conducting layer sinter by the present invention simultaneously, and the interface cohesion of cover cylinder and wear-resisting heat-conducting layer is tight, not easily delamination.After sintering laser scanning is carried out to wear-resisting heat-conducting layer, strengthen sintering degree and the wear-resisting heat-conducting layer of wear-resisting heat-conducting layer further and overlap combining closely of cylinder.
First pre-burning is carried out to cylinder sleeve green compact, can sintering time be reduced, reduce sintering energy consumption.In order to ensure the quality of sintered products, sintering pressure, sintering temperature and sintering time are controlled in above-mentioned scope.Pressure is too small, and the product porosity obtained is large, but intensity and rigidity do not reach requirement; Pressure is excessive, and the gas that pore-foaming agent produces easily overflows, and the product porosity obtained is little, and density is large, does not reach the requirement of lightweight.Temperature is too low and temperature retention time is too short can not be fully sintered, and temperature is too high and temperature retention time is long can produce fusing, Seepage, thus destroys the performance of material.
As preferably, the further heat treatment described in step S3 is laser scanning.Laser scanning can be heat-treated cover cylinder local, and not by the restriction of cover cylinder geomery, and treatment effect is good.
Compared with prior art, the present invention has following beneficial effect: car engine mantle cylinder of the present invention has higher intensity, rigidity, and quality is little, to ensure minimum inertia force.Thermal conductivity is good, high pressure resistant, corrosion-resistant, has sufficient heat-sinking capability.Car engine mantle cylinder surfaces anti-wear performance is good, high temperature resistant, thermal coefficient of expansion is little, and during variations in temperature, size, change in shape are little.Absorbing and sound absorption qualities good, can significantly reduce cover cylinder working time vibrations and noise.
Detailed description of the invention
Be below specific embodiments of the invention, technical scheme of the present invention is further described, but the present invention is not limited to these embodiments.
Embodiment 1
Car engine mantle cylinder in the present embodiment is by porosity 62.4%, the porous beallon pottery in 15.0 μm, aperture is made, porous beallon pottery by mass ratio be the beallon powder of 100:98.1:1.0:11, ceramic powder, pore-foaming agent and resinoid bond hot pressed sintering make, and is coated with the wear-resisting heat-conducting layer of one deck at the inwall of cover cylinder.
The cover cylinder car engine mantle cylinder of obtained the present embodiment by the following method:
Be the mixing of the beallon powder of 100:98.1:1.0:11, ceramic powder, pore-foaming agent and resinoid bond by mass ratio, make cylinder sleeve green compact at 800Mpa pressure; Wherein, beallon powder is made up of the component of following mass percent: 2.0%Be, 0.30%Co, 0.5%Si, 2.3%Ni, 0.3%Mg, 0.2%RE, and surplus is Cu; The particle diameter of beallon powder is 3 μm; Ceramic powder is β-SiC-HBN composite granule, comprises β-SiC and HBN that mass ratio is 100:42.8; The particle diameter of ceramic powder is 30nm; Pore-foaming agent is the TiH of 10%w/w
2, 55%w/w SrCO
3, and the mixing of Celogen Az of 35%w/w, the SiC layer that the external sheath of pore-foaming agent has one deck network-like;
Y is added in Si powder, carbon powder, Cu powder and Fe powder
2o
3ceramic original washing powder is made in powder and resinoid bond mixing, and the ceramic original washing powder after mixing is coated in inboard wall of cylinder liner, in 850Mpa pressure system;
Then by cylinder sleeve green compact first at 250Mpa pressure, 500 DEG C, N
2pre-burning 30-40min under environment; Then at 350Mpa pressure, N
2be warming up to 800 DEG C, 1000 DEG C, 1100 DEG C, 1150 DEG C, 1200 DEG C with the speed of 5 DEG C/min under environment, heat preservation sintering 30min, 30min, 50min, 110min, 80min, be cooled to room temperature subsequently and obtain the ripe base of cylinder sleeve that inwall has wear-resisting heat-conducting layer respectively; Wherein, wear-resisting heat-conducting layer is SiC/Si
3n
4composite ceramic layer, this ceramic layer is made up of the component of following mass percent: 3.0%C, 25%N, 3.0%Cu, 5%Fe, 1.0%Y, 0.8%Ce, and surplus is Si.
Laser scanning is carried out to wear-resisting heat-conducting layer, obtains lightweight wear resistant automobile cylinder sleeve of engine.
Embodiment 2
Car engine mantle cylinder in the present embodiment is by porosity 50.0%, the porous beallon pottery in 19.0 μm, aperture is made, porous beallon pottery by mass ratio be the beallon powder of 100:60.0:0.7:9, ceramic powder, pore-foaming agent and resinoid bond hot pressed sintering make, and is coated with the wear-resisting heat-conducting layer of one deck at the inwall of cover cylinder.
The cover cylinder car engine mantle cylinder of obtained the present embodiment by the following method:
Be the mixing of the beallon powder of 100:60.0:0.7:9, ceramic powder, pore-foaming agent and resinoid bond by mass ratio, make cylinder sleeve green compact at 890Mpa pressure; Wherein, beallon powder is made up of the component of following mass percent: 2.1%Be, 0.35%Co, 0.55%Si, 2.5%Ni, 0.4%Mg, 0.3%RE, and surplus is Cu; The particle diameter of beallon powder is 7 μm; Ceramic powder is β-SiC-HBN composite granule, comprises β-SiC and HBN that mass ratio is 100:48.5; The particle diameter of ceramic powder is 45nm; Pore-foaming agent is the ZrH of 13%w/w
2, 40%w/w CaCO
3, and the mixing of Celogen Az of 47%w/w, the SiC layer that the external sheath of pore-foaming agent has one deck network-like;
Y is added in Si powder, carbon powder, Cu powder and Fe powder
2o
3ceramic original washing powder is made in powder and resinoid bond mixing, and the ceramic original washing powder after mixing is coated in inboard wall of cylinder liner, in 880Mpa pressure system;
Then by cylinder sleeve green compact first at 300Mpa pressure, 540 DEG C, N
2pre-burning 35min under environment; Then at 400Mpa pressure, N
2be warming up to 800 DEG C, 1000 DEG C, 1100 DEG C, 1150 DEG C, 1200 DEG C with the speed of 5 DEG C/min under environment, heat preservation sintering 30min, 30min, 50min, 110min, 80min, be cooled to room temperature subsequently and obtain the ripe base of cylinder sleeve that inwall has wear-resisting heat-conducting layer respectively; Wherein, wear-resisting heat-conducting layer is SiC/Si
3n
4composite ceramic layer, this ceramic layer is made up of the component of following mass percent: 4.2%C, 28%N, 3.2%Cu, 5.5%Fe, 1.1%Y, 0.9%Ce, and surplus is Si.
Laser scanning is carried out to wear-resisting heat-conducting layer, obtains lightweight wear resistant automobile cylinder sleeve of engine.
Embodiment 3
Car engine mantle cylinder in the present embodiment is by porosity 55.3%, the porous beallon pottery in 26.5 μm, aperture is made, porous beallon pottery by mass ratio be the beallon powder of 100:85.4:0.9:10, ceramic powder, pore-foaming agent and resinoid bond hot pressed sintering make, and is coated with the wear-resisting heat-conducting layer of one deck at the inwall of cover cylinder.
The cover cylinder car engine mantle cylinder of obtained the present embodiment by the following method:
Be the mixing of the beallon powder of 100:85.4:0.9:10, ceramic powder, pore-foaming agent and resinoid bond by mass ratio, make cylinder sleeve green compact at 950Mpa pressure; Wherein, beallon powder is made up of the component of following mass percent: 2.2%Be, 0.40%Co, 0.60%Si, 2.8%Ni, 0.4%Mg, 0.4%RE, and surplus is Cu; The particle diameter of beallon powder is 8 μm; Ceramic powder is β-SiC-HBN composite granule, comprises β-SiC and HBN that mass ratio is 100:50.5; The particle diameter of ceramic powder is 50nm; Pore-foaming agent is the NiH of 14%w/w
2, 50%w/w MgCO
3with the mixing of the Celogen Az of 35%w/w, the SiC layer that the external sheath of pore-foaming agent has one deck network-like;
Y is added in Si powder, carbon powder, Cu powder and Fe powder
2o
3ceramic original washing powder is made in powder and resinoid bond mixing, and the ceramic original washing powder after mixing is coated in inboard wall of cylinder liner, in 920Mpa pressure system;
Then by cylinder sleeve green compact first at 320Mpa pressure, 580 DEG C, N
2pre-burning 38min under environment; Then at 460Mpa pressure, N
2be warming up to 800 DEG C, 1000 DEG C, 1100 DEG C, 1150 DEG C, 1200 DEG C with the speed of 5 DEG C/min under environment, heat preservation sintering 30min, 30min, 50min, 110min, 80min, be cooled to room temperature subsequently and obtain the ripe base of cylinder sleeve that inwall has wear-resisting heat-conducting layer respectively; Wherein, wear-resisting heat-conducting layer is SiC/Si
3n
4composite ceramic layer, this ceramic layer is made up of the component of following mass percent: 5.0%C, 30%N, 3.3%Cu, 6.5%Fe, 1.4%Y, 1.1%Ce, and surplus is Si.
Laser scanning is carried out to wear-resisting heat-conducting layer, obtains lightweight wear resistant automobile cylinder sleeve of engine.
Embodiment 4
Car engine mantle cylinder in the present embodiment is by porosity 68.5%, the porous beallon pottery in 10.5 μm, aperture is made, porous beallon pottery by mass ratio be the beallon powder of 100:136.2:1.2:12, ceramic powder, pore-foaming agent and resinoid bond hot pressed sintering make, and is coated with the wear-resisting heat-conducting layer of one deck at the inwall of cover cylinder.
The cover cylinder car engine mantle cylinder of obtained the present embodiment by the following method:
Be the mixing of the beallon powder of 100:136.2:1.2:12, ceramic powder, pore-foaming agent and resinoid bond by mass ratio, make cylinder sleeve green compact at 1000Mpa pressure; Wherein, beallon powder is made up of the component of following mass percent: 2.3%Be, 0.45%Co, 0.65%Si, 3.0%Ni, 0.5%Mg, 0.5%RE, and surplus is Cu; The particle diameter of beallon powder is 12 μm; Ceramic powder is β-SiC-HBN composite granule, comprises β-SiC and HBN that mass ratio is 100:57.1; The particle diameter of ceramic powder is 30-70nm; Pore-foaming agent is the NiH of 15%w/w
2, 35%w/w CaMg (CO
3)
2with the mixing of the Celogen Az of 55%w/w, the SiC layer that the external sheath of pore-foaming agent has one deck network-like;
Y is added in Si powder, carbon powder, Cu powder and Fe powder
2o
3ceramic original washing powder is made in powder and resinoid bond mixing, and the ceramic original washing powder after mixing is coated in inboard wall of cylinder liner, in 1000Mpa pressure system;
Then by cylinder sleeve green compact first at 350Mpa pressure, 600 DEG C, N
2pre-burning 40min under environment; Then at 500Mpa pressure, N
2be warming up to 800 DEG C, 1000 DEG C, 1100 DEG C, 1150 DEG C, 1200 DEG C with the speed of 5 DEG C/min under environment, heat preservation sintering 30min, 30min, 50min, 110min, 80min, be cooled to room temperature subsequently and obtain the ripe base of cylinder sleeve that inwall has wear-resisting heat-conducting layer respectively; Wherein, wear-resisting heat-conducting layer is SiC/Si
3n
4composite ceramic layer, this ceramic layer is made up of the component of following mass percent: 6.1%C, 35%N, 3.5%Cu, 7.5%Fe, 1.5%Y, 1.2%Ce, and surplus is Si.
Laser scanning is carried out to wear-resisting heat-conducting layer, obtains lightweight wear resistant automobile cylinder sleeve of engine.
Comparative example 1
Car engine mantle cylinder is made up of beallon, and the uncoated wear-resisting heat-conducting layer of the cover inside wall of cylinder, all the other are all identical with embodiment 1.
Comparative example 2
Car engine mantle cylinder is made up of beallon pottery, and the uncoated wear-resisting heat-conducting layer of the cover inside wall of cylinder, all the other are all identical with embodiment 1.
Comparative example 3
The wear-resisting heat-conducting layer of the car engine mantle inside wall of cylinder is coated in head 1 top by the mode of laser scanning after car engine mantle cylinder has sintered, and all the other are all identical with embodiment 1.
The performance of car engine mantle cylinder in car engine mantle cylinder performance in embodiment of the present invention 1-4 and comparative example 1-3 compared, comparative result is as shown in table 1.
The comparison of performance wiry in table 1: embodiment 1-4 and comparative example 1-3
In sum, car engine mantle cylinder of the present invention has higher intensity, rigidity, and quality is little, to ensure minimum inertia force.Thermal conductivity is good, high pressure resistant, corrosion-resistant, has sufficient heat-sinking capability.Car engine mantle cylinder surfaces anti-wear performance is good, high temperature resistant, thermal coefficient of expansion is little, and during variations in temperature, size, change in shape are little.Absorbing and sound absorption qualities good, can significantly reduce cover cylinder working time vibrations and noise.Compare and directly carry out laser scanning, carry out the mode of laser scanning after adopting sintering to wear-resisting heat-conducting layer again, the combination of wear-resisting heat-conducting layer and matrix is tightr.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present invention or surmount the scope that appended claims defines.
Claims (9)
1. a lightweight wear resistant automobile cylinder sleeve of engine, it is characterized in that, described cylinder sleeve is made up of porous beallon pottery, be coated with the wear-resisting heat-conducting layer of one deck at the inwall of cover cylinder, it is 100:(60.0-136.2 that described porous beallon pottery comprises mass ratio): (0.7-1.2): the beallon powder of (9-12), ceramic powder, pore-foaming agent and resinoid bond.
2. lightweight wear resistant automobile cylinder sleeve of engine according to claim 1, is characterized in that, the porosity of described porous beallon pottery is 50.0-68.5%, and aperture is 10.5-19.0 μm.
3. lightweight wear resistant automobile cylinder sleeve of engine according to claim 1, is characterized in that, the particle diameter of described beallon powder is 3-12 μm, and the particle diameter of ceramic powder is 30-70nm.
4. lightweight wear resistant automobile cylinder sleeve of engine according to claim 1, it is characterized in that, described beallon powder is made up of the component of following mass percent: 2.0-2.3%Be, 0.30-0.45%Co, 0.5-0.65%Si, 2.3-3.0%Ni, 0.3-0.5%Mg, 0.2-0.5%RE, surplus is Cu.
5. lightweight wear resistant automobile cylinder sleeve of engine according to claim 1, is characterized in that, described ceramic powder is β-SiC-HBN composite granule, and comprising mass ratio is 100:(42.8-57.1) β-SiC and HBN.
6. lightweight wear resistant automobile cylinder sleeve of engine according to claim 1, it is characterized in that, described pore-foaming agent comprises the mixture of pore-foaming agent I, pore-foaming agent II and pore-foaming agent III, wherein, in the mixture of pore-foaming agent I, pore-foaming agent II and pore-foaming agent III, the content of described pore-foaming agent I accounts for the 10-15% of mixture gross mass, and the content of pore-foaming agent II accounts for the 35-55% of mixture gross mass, and surplus is pore-foaming agent III.
7. the lightweight wear resistant automobile cylinder sleeve of engine according to claim 1 or 6, is characterized in that, the SiC layer that the external sheath of described pore-foaming agent has one deck network-like.
8. lightweight wear resistant automobile cylinder sleeve of engine according to claim 1, is characterized in that, described wear-resisting heat-conducting layer is SiC/Si
3n
4composite ceramic layer, this ceramic layer is made up of the component of following mass percent: 3.0-6.1%C, 25-35%N, 3.0-3.5%Cu, 5-7.5%Fe, 1.0-1.5%Y, 0.8-1.2%Ce, and surplus is Si.
9. a preparation method for the lightweight wear resistant automobile cylinder sleeve of engine as described in any one of claim 1-8, it is characterized in that, the step of described preparation method is as follows:
S1, beallon powder, ceramic powder, pore-foaming agent and resinoid bond to be mixed in proportion, then make cylinder sleeve green compact at 800-1000Mpa pressure;
S2, in Si powder, carbon powder, Cu powder and Fe powder, add Y
2o
3ceramic original washing powder is made in powder and resinoid bond mixing, and the ceramic original washing powder after mixing is coated in inboard wall of cylinder liner, in 800-1000Mpa pressure system;
S3, by the cylinder sleeve green compact in step S2 first at 250-350Mpa pressure, 500-600 DEG C, N
2pre-burning 30-40min under environment; Then at 350-500Mpa pressure, N
2be warming up to 800 DEG C, 1000 DEG C, 1100 DEG C, 1150 DEG C, 1200 DEG C with the speed of 5 DEG C/min under environment, heat preservation sintering 30min, 30min, 50min, 110min, 80min, be cooled to room temperature subsequently and obtain the ripe base of cylinder sleeve that inwall has wear-resisting heat-conducting layer respectively;
S4, the wear-resisting heat-conducting layer in step S3 to be heat-treated, obtain lightweight wear resistant automobile cylinder sleeve of engine.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108247065A (en) * | 2017-12-28 | 2018-07-06 | 四川飞亚动力科技股份有限公司 | A kind of lightweight connecting rod |
| CN111511540A (en) * | 2017-12-06 | 2020-08-07 | 赛峰航空器发动机 | Coating with property gradient for turbine engine inner wall |
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| US4921734A (en) * | 1987-05-16 | 1990-05-01 | Ae Plc | Cylinder liners |
| CN1616691A (en) * | 2004-11-26 | 2005-05-18 | 宋协福 | Beryllium copper alloy |
| CN1970497A (en) * | 2005-11-21 | 2007-05-30 | 范兴宽 | TiC-Cr3C2 base cermet composite cylinder jacket |
| CN102643111A (en) * | 2012-05-14 | 2012-08-22 | 刘宗蒲 | Preparation method for porous ceramics |
| CN103437896A (en) * | 2013-08-02 | 2013-12-11 | 浙江吉利汽车研究院有限公司 | Cylinder device and manufacturing method thereof |
| CN103817150A (en) * | 2014-02-26 | 2014-05-28 | 湖南天益高技术材料制造有限公司 | Gradient-structure hard alloy roll collar and manufacturing process thereof |
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| US4921734A (en) * | 1987-05-16 | 1990-05-01 | Ae Plc | Cylinder liners |
| CN1616691A (en) * | 2004-11-26 | 2005-05-18 | 宋协福 | Beryllium copper alloy |
| CN1970497A (en) * | 2005-11-21 | 2007-05-30 | 范兴宽 | TiC-Cr3C2 base cermet composite cylinder jacket |
| CN102643111A (en) * | 2012-05-14 | 2012-08-22 | 刘宗蒲 | Preparation method for porous ceramics |
| CN103437896A (en) * | 2013-08-02 | 2013-12-11 | 浙江吉利汽车研究院有限公司 | Cylinder device and manufacturing method thereof |
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| CN111511540A (en) * | 2017-12-06 | 2020-08-07 | 赛峰航空器发动机 | Coating with property gradient for turbine engine inner wall |
| CN108247065A (en) * | 2017-12-28 | 2018-07-06 | 四川飞亚动力科技股份有限公司 | A kind of lightweight connecting rod |
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