CN103352978A - Al3Ti/Al3Ni particles synergetic enhancement silicon aluminum matrix composite piston and preparation method thereof - Google Patents
Al3Ti/Al3Ni particles synergetic enhancement silicon aluminum matrix composite piston and preparation method thereof Download PDFInfo
- Publication number
- CN103352978A CN103352978A CN2013102239262A CN201310223926A CN103352978A CN 103352978 A CN103352978 A CN 103352978A CN 2013102239262 A CN2013102239262 A CN 2013102239262A CN 201310223926 A CN201310223926 A CN 201310223926A CN 103352978 A CN103352978 A CN 103352978A
- Authority
- CN
- China
- Prior art keywords
- piston
- particle
- composite piston
- strengthens
- electromagnetic field
- 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.)
- Granted
Links
Images
Landscapes
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The invention discloses an Al3Ti/Al3Ni particles synergetic enhancement silicon aluminum matrix composite piston and a preparation method thereof. The composite piston comprises a piston body and reinforced wearing layers arranged at the end part of the piston body and the surface of an annular groove area, the piston body is made of silicon aluminum alloy, and the reinforced wearing layers are made of silicon aluminum alloy and Al3Ti and Al3Ni particles distributed in the silicon aluminum alloy. The preparation method comprises the following steps: arranging a piece of graphite paper on the inner wall of a piston module, placing a titanium-nickel alloy wire mesh on the piece of graphite paper, pouring silicon aluminum alloy melt into the piston module under the action of electromagnetic field, stopping the applying of electromagnetic field after the silicon aluminum alloy is solidified, and conducting forging, heat treating, machining and polishing, so as to obtain the composite piston. The composite piston provided by the invention is better in oxidation resistance and abrasive resistance.
Description
Technical field
The present invention relates to high silica/aluminum-based piston, be specifically related to the synthetic Al of a kind of electromagnetic field method original position
3Ti/Al
3The collaborative sial base composite piston and preparation method thereof that strengthens of Ni particle.
Background technique
In recent years, development along with automotive light weight technology, increasing automobile has adopted the alumina-base material motor, piston is as constituent elements important in the motor, the piston material that uses mainly contains cast iron, cast steel, aluminum alloy, and the piston material that goes out newly developed, such as aluminum matrix composite, stupalith, material with carbon element, heatproof magnesium alloy material, magnesium base composite material etc.And study at present and use maximum be Al ?Si be multicomponent alloy, becoming component selections to experience by hypoeutectic, eutectic, hypereutectic evolution, and Al ?Si piston product adopt Gravity Permanent-Mold Casting Process, low-pressure die casting, extrusion casint and semi-solid state forming technique more.
Piston is when work, and piston circular groove and piston, piston skirt and casing wall to-and-fro motion have consisted of respectively friction pair.Pistons end directly contacts with high-temperature high-pressure fuel gas, bear larger heat load and mechanical load, again because of high speed to-and-fro motion in the cylinder sleeve of lubricating condition extreme difference, bear great inertial force, therefore, piston ring groove, piston skirt and pistons end wearing and tearing are rapid, and piston failure mainly is that piston ring groove and pistons end lost efficacy.For improving the working life of piston, develop particle reinforced aluminium-based composite piston, namely utilize the easy inefficacy position of the ceramic particle enhancing piston of high hardness, high-modulus, to improve the life-span of piston, mainly be that the SiC particle is joined in the body material of melting at present, cast molding obtains composite piston under gravity or External Force Acting, but the defective that this method that adds particle is prepared composite piston is: particle is combined relatively poor with the interface of matrix, combination force is lower, in use, reinforcing phase comes off easily, and secondly reinforcing phase is unstable, at high temperature easily decomposes.Develop again the preparation technology that in-situ synthesis prepares composite piston based on this, namely in system, form desired enhancing body, being characterized in strengthening body is not extraneous the introducing, but in metallic matrix by the original position forming core, growing up obtains surface no-pollution,, reinforcing phase that thermomechanics more stable high with basal body interface bond strength, guaranteeing to strengthen particle is combined at the interface preferably with matrix, and in matrix good thermodynamic stability, be beneficial under the worst hot case and work, thereby enlarged the application that particle strengthens composite piston.
One of purpose of the present invention is to provide a kind of Al
3Ti/Al
3The collaborative sial base composite piston that strengthens of Ni particle.
Correspondingly, Al provided by the invention
3Ti/Al
3The collaborative sial base composite piston that strengthens of Ni particle comprises piston only and the enhancing wearing layer that is located on piston only end and the circular groove area surfaces, and the material of described piston only is silico-aluminum, and the material of described enhancing wearing layer is Al
3Ti, Al
3Ni and silico-aluminum.
The material of described enhancing wearing layer is Al
3Ti particle, Al
3Ni particle, Al
3Ti particle and Al
3The intergranular silico-aluminum of Ni.
The thickness of described enhancing wearing layer is 1～5mm.
Described enhancing wearing layer is to use the mol ratio of Ti and Ni to be (1～10): the Ti-Ni alloy silk preparation of (1～10).
The diameter of described Ti-Ni alloy silk is 50～150 μ m.
Another object of the present invention is to provide above-mentioned Al
3Ti/Al
3The collaborative preparation method who strengthens sial base composite piston of Ni particle, the method be the synthetic Al of original position under electromagnetic field effect specifically
3Ti/Al
3The Ni particle.
Method may further comprise the steps:
Arrange graphite paper at the Piston mould inwall, place the Ti-Ni alloy silk screen at graphite paper, afterwards, at elect magnetic field, cast silico-aluminum melt after silico-aluminum solidifies, stops to apply electromagnetic field in Piston mould, obtains semi-finished product;
To semi-finished product forge, heat treatment, machining and grinding process;
Obtain afterwards finished product.
Described Ti-Ni alloy silk screen is 20～100 purpose Ti-Ni alloy silk screens.
The frequency of described electromagnetic field is that 2000～3000Hz, power are 20～30KW.
When the silico-aluminum melt begins to solidify, reduce the intensity of electromagnetic field among the above-mentioned preparation method, and progressively reduce the power of electromagnetic field in the silico-aluminum process of setting, after the silico-aluminum melt solidified fully, the power of electromagnetic field reduced to zero.
Compared with prior art, the present invention has following advantage:
(1) end of piston and annular slot part are the Al that alloy generates at the process of setting situ
3Ti/Al
3The enhancing zone that Ni particle and aluminum substrate form has preferably wear resistance and high temperature oxidation resistance; Piston skirt and pin-and-hole are agranular non-enhancing zone, have preferably tensile strength; Strengthen zone and the interregional formation metallurgy combination of non-enhancing;
(2) strengthening body is evenly distributed: selecting of the Ti-Ni alloy silk screen of micron order diameter generates the Al that is evenly distributed for reaction in-situ
3Ti/Al
3The Ni reinforced particulate is laid a good foundation, and saves simultaneously a large amount of precious metals.
(3) apply electromagnetic field effect: 1. mold and Ti-Ni alloy silk are magnetic conductive substance, but apply electromagnetic field rapidly pre-warming mold, avoid mold and silk screen Yin Wendu low, cause the formation of solidified shell; 2. can play the effect of crystal grain thinning; 3. can play the effect that homogenization distributes to two kinds of synthetic particles of reaction in-situ; 4. the recombination region that strengthens of particle, its matrix be spherical De α ?the Al matrix, during remelting to 550 ℃～570 ℃, thixotropy is better, suitable forging and molding, is beneficial to dense structure.
(4) combination force is strong: the enhancing body that original position is synthetic and the interface of matrix are clean, combination is firm, can very effectively transmit stress, guarantee the performance of composite-material abrasive and high-temperature mechanical property, and then prolong the working life of piston.
(5) oxidative stability strengthens: the outer surface of composite piston contains a large amount of Al
3Ti/Al
3Ni strengthens body, forms fine and close aluminum oxide film when high temperature, but not the hybrid films that aluminium oxide and titanium oxide form shows preferably oxidation resistance;
(6) wear resistance is good: a large amount of Al
3Ti/Al
3Ni strengthen body except with matrix preferably the combination force, also have higher hardness.
(7) the composite piston parameter density of method of the present invention preparation be 1.9 ?2.3g/cm
3Resistance to flexure be 90 ?115Mpa; Expansion coefficient is (7 ?9) * 10
?6/ ℃; Friction factor be 0.035 ?0.074; Heat conductivity be 80 ?140W/mK.
A kind of preferred Al
3Ti/Al
3The Ni particle is the collaborative preparation method who strengthens the aluminum-base composite piston may further comprise the steps:
(1) arranges one deck graphite paper at the Piston mould inwall, again the Ti-Ni alloy silk screen is close to graphite paper and is arranged;
(2) beginning to apply frequency before the cast is that 2000～3000Hz, power are the electromagnetic field of 20～30KW, first Piston mould and Ti-Ni alloy silk screen is preheating to 200～300 ℃;
Then the silico-aluminum liquid with melting is cast in the Piston mould, and pouring temperature is 700～760 ℃, and the silico-aluminum flow quantity is 5～15Kg/min;
After pouring 5～10min, press the Speed Reduction electromagnetic field power of 3～5KW/min, after solidifying fully to the silico-aluminum melt, stop to apply electromagnetic field, must cast the attitude composite piston;
(3) will cast attitude composite piston remelting to 550 ℃～570 ℃, then send in the forging die cavity of forging die machine, carry out the thixotroping forging and pressing and process, obtain forging the attitude composite piston, the interior preheating temperature of model cavity is during forging: 100～300 ℃, forging deformation speed is 5～15mm/s;
(4) will forge the attitude composite piston and under 450～500 ℃ of conditions, process 8～10h, then under 150～200 ℃ of conditions, process 3～6h;
Piston after processing through step (4) is carried out machining and polishing, obtain Al
3Ti/Al
3The collaborative sial base composite piston that strengthens of two kinds of particles of Ni.
Among the above-mentioned preferred preparation method:
The effect of graphite paper mainly is the adhesion of avoiding melt and mould, if cause casting piece rough after connecting.
After pouring, continue to apply electromagnetic field, under the induction heating effect, impel the aluminium liquid of liquid state and solid-state Ti-Ni alloy silk screen reaction, form Al
3Ti/Al
3Two kinds of intermetallic compound particles of Ni, and be uniformly distributed in the end of piston and circular groove zone; Behind reaction 5～10min, by the rate reduction electromagnetic power of 3～5KW/min, and even after molten metal solidifies fully, stop to apply electromagnetic field, from mould, take out foundry goods, be cooled to room temperature, can obtain the collaborative casting attitude aluminum-base composite piston that strengthens of two kinds of particles; Solidifying under electromagnetic field effect of casting attitude composite piston carried out in this process, according to the semisolid forming principle, the tissue of matrix be mainly spherical De α ?Al, be beneficial to the thixotroping forging and pressing and process; And melt is in strong mixed convection motion state under the long-range navigation magnetic force that additional electromagnetic field produces, and heat transfer and mass transfer velocity obviously improve, and have increased the touch opportunity between high temperature aluminum liquid and Ti-Ni alloy silk, and reaction interface enlarges, reinforcing phase Al
3Ti, Al
3The generation quantity of Ni particle increases; And the Al that reaction in-situ is synthetic
3Ti strengthens body can change the L12 structure into by alloying element Ni, the A1 after the alloyage
3The brittleness at room temperature of Ti has had larger change, thereby improves the toughness of composite material.
The composite piston microstructure even compact, the crystal grain that adopt above-mentioned method for optimizing to make are tiny, have preferably thermal conductivity and low thermal expansion coefficient, resistance to high temperature raising, tensile strength: 280～300MPa, hardness: HB〉100, for single AlSi alloy piston, wear resistance increases by 1.5～2.0 times, and the oxidation resistance in 400～500 ℃ of scopes improves about 1 times.Piston mass with respect to the cast iron class alleviates 2～3 times, can greatly improve piston IC engine efficient, reduces engine weight, reduces the advantages such as oil consumption and discharge amount.
Adopt the composite piston of above-mentioned method for optimizing manufacturing to compare with the AlSi alloy piston of overheated liquid melts casting, semi-solid-state metal contains the spherical nascent solid phase of certain volume mark, but remelting and be beneficial to the thixotroping conducting forging processing, reduce the defectives such as pore, component segregation in the tissue, greatly improve the compactness of tissue.
Description of drawings
Fig. 1 is Al of the present invention
3Ti/Al
3Partial structurtes reference view in the preparation process of the collaborative enhancing of Ni particle aluminum-base composite piston;
Fig. 2 is the micro-organization chart of the casting attitude composite piston of embodiment's 1 preparation;
Fig. 3 is the micro-organization chart of the casting attitude composite piston of embodiment's 2 preparations;
Fig. 4 is the micro-organization chart of the casting attitude composite piston of embodiment's 3 preparations;
Among the figure: 1-electromagnetic induction coil, 2-mould, 3-Ti-Ni alloy silk screen.
Embodiment
Compare with ceramic particle, Al ?Ti, Al ?the Ni series intermetallic compound not only have low density, high hardness and high fusing point, and similar lattice structure and close thermal expansion coefficient are arranged to metal A l matrix, the present invention adds Al in mature high strength sial piston matrix
3Ti and Al
3Two kinds of intermetallic compound particles of Ni improve friction resistant, polishing machine on the one hand, reduce on the other hand thermal expansion coefficient and improve pyroconductivity, thereby guarantee the high temperature resistant property of composite piston.
The present invention is in conjunction with Al
3Ti, Al
3The characteristics such as Ni intermetallic compounds, electromagnetic induction preheating effect, liquid-solid reaction, forging and molding provide a kind of synthetic Al of electromagnetic field original position that applies
3Ti/Al
3The collaborative sial base composite piston and preparation method thereof that strengthens of two kinds of particles of Ni is with the more requirement of to satisfy effectively piston abrasion-proof and high-temperature mechanical property.
The invention discloses Al
3Ti/Al
3Collaborative sial base composite piston and the preparation method of strengthening of Ni particle.Disclosed composite piston comprises piston only and is located at the end of piston only and the enhancing wearing layer on the circular groove area surfaces, the piston only material is silico-aluminum, strengthens wearing layer 3(with reference to figure 1) material be silico-aluminum and be distributed in Al in the silico-aluminum
3Ti particle and Al
3Ni particle, its thickness are 1～5mm; Described Al
3Ti/Al
3Two kinds of particles of Ni by the aluminum substrate in Ti-Ni alloy silk and the silico-aluminum melt at electromagnetic induction coil 1(with reference to figure 1) effect under reaction in-situ obtain.
The silk screen that reinforcing phase of the present invention is woven into from the Ti-Ni alloy silk is only strengthened end and the circular groove zone of piston, has greatly saved resource; About Ti-Ni alloy silk screen used in the method: with Ti atom and Ni atomic molar than being (1～10): (1～10), diameter are that to be woven into the mesh specification be 20～100 purpose nets to the Ti-Ni alloy silk of 50～150 μ m, then treat shape, size and the thickness of enhancement region according to pistons end and circular groove, select the alloy silk screen of the suitable number of plies, and it is carried out cutting and stack, obtain the drum-shaped Ti-Ni alloy silk screen with the bottom surface;
Used Piston mould carbon content among the preparation method of the present invention＜0.30%, permeability is 1000～3000, the wall thickness of mould can be chosen between 10～15mm.
Piston only material silicon aluminum alloy of the present invention according to the requirement of piston basic material, is determined the chemical composition of sial sill, at 750～820 ℃ of lower melting silico-aluminums.
Below be the specific embodiment that the inventor provides, need to prove to the invention is not restricted to these embodiments, in the scope that the present invention provides, all can make qualified Al
3Ti/Al
3The high silica/aluminum-based composite piston of the collaborative enhancing of two kinds of particles of Ni.
Embodiment 1:
The piston size of present embodiment preparation is that external diameter is 150mm, and the enhancement layer of pistons end and circular groove is the thick Al of 2～3mm
3Ti/Al
3Two kinds of intermetallic compound particles of Ni strengthen sial based composites, wherein Al
3Ti/Al
3The mol ratio of Ni is 10:1, and the silica/aluminum-based alloy body material is: silicon: 18.0, copper: 4.0, magnesium: 0.7, zinc: 0.2, nickel: 1.0, iron: 1.0, all the other are aluminium.
The step of preparation process of present embodiment is as follows:
The first step, it is 100 order Ti-Ni alloy silk screens that Ti/Ni content atomic molar is woven into the mesh specification than the Ti-Ni alloy silk that for 10:1, diameter is 150 μ m, then treat thickness, shape and the size of enhancement region according to outer surface of piston, intercept the disk that three diameters are about 200mm, its overlapping system is made the barrel-shaped silk screen precast body that diameter is, drum is of a size of Ф 150mm * 50mm;
Second step according to the size and dimension of piston, is prepared Piston mould;
The 3rd step, arrange graphite paper and Ti-Ni alloy silk screen precast body: with reference to figure 1, Ti-Ni alloy silk screen 3 precast bodies that obtain in graphite paper and the step 1 are arranged in respectively in the Piston mould 1, graphite paper is between mould inner wall and precast body, and the precast body present position is that pistons end and circular groove are treated the relevant position of enhancement region in the low carbon steel mould;
The 4th step, with the piston body material 790 ?820 ℃ of lower meltings, leave standstill 15min after, obtain the piston body material of melting;
The 5th step, pouring into a mould first three minute, apply frequency 3000Hz, power is the electromagnetic field of 30KW, utilize electromagnetic field with mold and silk screen precast body be preheating to 200 ?300 ℃, when avoiding pouring into a mould melt, run into cold mold, cause the formation of solidified shell, then the piston parent metal liquid of melting is poured in the piston low carbon steel mould that step 3 obtains, wherein pouring temperature is 760 ℃ of 740 ?, molten metal flow 10Kg/min;
The 6th step, after pouring, continue to apply electromagnetic field, under the induction heating effect, impel the metal aluminium liquid of pressing close to casting wall inwall still to be in liquid phase region, realize that liquid phase aluminium liquid and solid-state Ti-Ni alloy silk reaction form Al
3The Ti intermetallic compounds, the particle size distribution that forms is in the inwall (end and the circular groove zone that mainly refer to piston) of mold, 5 ?behind the 10min, press the power of 5KW/min Speed Reduction electromagnetic field, and even after solidifying fully, stop to apply electromagnetic field, obtain intermetallic compounds and strengthen sial base casting attitude composite piston;
The 7th step: forge obtaining of attitude composite piston: will cast attitude composite piston remelting to 560 ± 5 ℃ in electric furnace of resistance type, then send in the forging die cavity of forging die machine, carry out the thixotroping excellent suitability for press forming, obtain the forging attitude composite piston of dense structure, mold preheating temperature during forging is 250 ℃, and forging deformation speed is 10mm/s;
The 8th step, the obtaining of heat treatment state composite piston: will under 480 ± 5 ℃ of conditions, place 10h through the finished piston semi-finished product of step 7, and then under 155 ± 5 ℃ of conditions, place 5h;
The 9th step, machining and grinding process: the heat treatment state composite piston that obtains through step 8 is carried out machining and polishing, obtain Al
3The particle reinforced aluminium-based composite piston of Ti.
The composite piston parameter density of this embodiment's preparation is 2.1g/cm
3, to be 105Mpa, expansion coefficient be (7 ?9) * 10 to resistance to flexure
?6/ ℃, friction factor be 0.055 ?0.070, heat conductivity be 110 ?130W/mK, hardness be HB 100, for single AlSi alloy piston, wear resistance increases more than 1.8 times, 400 ? oxidation resistance in 500 ℃ of scopes improve about 1 times.
Piston mass with respect to the cast iron class alleviates about 2/3.400 ? oxidation resistance in 500 ℃ of scopes improve about 1 times.
The micro-organization chart that the casting attitude composite piston of this embodiment preparation strengthens wear-resisting district as shown in Figure 2.A large amount of grizzled particle of recombination region, Fig. 2 middle and upper part is Al
3Ti, the white particle of a little and rod-like phase are Al
3The Ni particle.It is the silico-aluminum matrix area that the bottom does not have the zone of particle.
Embodiment 2:
The present embodiment preparation size is the aluminum-base composite piston of external diameter: 100mm, and its enhancement layer is the thick Al of 1～2mm
3Ti/Al
3Ni two kinds of intermetallic compound particle reinforced aluminum matrix composites, wherein Al
3Ti/Al
3The mark of Ni is than being 4:1, and body material is the A390 silumin, and chemical composition is: silicon: 17.0, copper: 4.5, magnesium: 0.6, zinc: 0.1, nickel: 0.7, iron: 0.5, all the other are aluminium.
This embodiment is with enforcement 1 difference: (1) strengthens body Al
3Ti/Al
3The ratio of Ni is different; (2) chemical composition of matrix is different, refers to that mainly the content of silicon is different; (3) thickness of enhancing body is different.
Be 4:1 with Ti/Ni content atomic ratio, diameter is that to be woven into the mesh specification be 60 purpose silk screens to the Ti-Ni alloy silk of 50 μ m, then treat thickness, shape and the size of enhancement region according to outer surface of piston, the circular net sheet of two diameter 150mm of intercepting, it is overlappingly made barrel-shaped silk screen precast body, and drum is of a size of Ф 100mm * 50mm;
With the piston body material 750 ?780 ℃ carry out melting, leave standstill 10min, obtain the piston body material of melting;
Pouring into a mould first three minute, applying frequency is that 2500Hz, power are the electromagnetic field of 25KW, utilize electromagnetic field that mold and silk screen precast body are preheating to 200～300 ℃, then the piston parent metal liquid of melting is poured in the piston low carbon steel mould that step 3 obtains, wherein pouring temperature is 720～750 ℃, and the molten metal flow is 15Kg/min;
Pour 5 ?behind the 10min, press the power of 3KW/min Speed Reduction electromagnetic field, after solidifying fully, stop to apply electromagnetic field;
With above-mentioned casting attitude composite piston remelting to 565 ± 5 ℃ in electric furnace of resistance type, then send in the forging die cavity of forging die machine, carry out the thixotroping forging and molding, obtain the forging attitude composite piston of dense structure; Mold preheating temperature during forging is 100 ℃, and forging deformation speed is 5mm/s;
The composite piston parameter density of this embodiment's preparation is 2.2g/cm
3, to be 110Mpa, expansion coefficient be (7.5 ?8.5) * 10 to resistance to flexure
?6/ ℃, friction factor be 0.045 ?0.060, heat conductivity be 110 ?130W/mK, hardness be HB 100, for single all-aluminium piston, wear resistance increases more than 1.5 times, the wear resistance of comparing with single AlSi alloy piston increases more than 1.8 times, 400 ? oxidation resistance in 500 ℃ of scopes improve about 1 times.Piston mass with respect to the cast iron class alleviates about 2/3.400 ? oxidation resistance in 500 ℃ of scopes improve about 1 times.
The micro-organization chart that the casting attitude composite piston of this embodiment preparation strengthens wear-resisting district as shown in Figure 3.The a large amount of grizzled particle in recombination region is Al among Fig. 3
3Ti, white particle and rod-like phase are Al
3The Ni particle.
Embodiment 3:
It is 70mm that present embodiment prepares the composite piston outside dimension, and its enhancement layer is the thick Al of 1～2mm
3Ti/Al
3The aluminum matrix composite that two kinds of intermetallic compoundss of Ni strengthen, wherein Al
3Ti/Al
3≤ 0.1(impurity), titanium≤0.3(impurity), manganese≤0.3(impurity), magnesium the mol ratio of Ni is 2:1, and the body material chemical composition is: silicon: 7.5～.9.0, copper:: 0.35～0.55, zinc::: 0.10～0.30, beryllium: 0.15～0.40, all the other are aluminium.
This embodiment is with enforcement 1 difference: (1) strengthens body Al
3Ti/Al
3The ratio of Ni is different; (2) chemical composition of matrix is different, refers to that mainly the content of silicon is different; (3) thickness of enhancing body is different.
Be 2:1 with Ti/Ni content atomic ratio first, diameter is that to be woven into the mesh specification be 100 purpose silk screens to the Ti-Ni alloy silk of 100 μ m, then treat thickness, shape and the size of enhancement region according to piston, the Ti-Ni alloy silk netting of two diameter 120mm of intercepting, it is overlappingly made barrel-shaped silk screen precast body, and drum is of a size of Ф 70mm * 50mm;
Pouring into a mould first three minute, applying frequency is that 2000Hz, power are the electromagnetic field of 20KW, utilize electromagnetic field with Piston mould and silk screen precast body be preheating to 200 ?300 ℃, then the piston parent metal liquid of melting is poured in the piston low carbon steel mould that step 3 obtains, wherein pouring temperature is 750 ℃ of 720 ?, molten metal flow 5Kg/min;
To cast attitude composite piston remelting to 560 ± 5 ℃ in electric furnace of resistance type, then send in the forging die cavity of forging die machine, carry out the thixotroping excellent suitability for press forming, obtain the forging attitude composite piston of dense structure, mold preheating temperature during forging is 300 ℃, and forging deformation speed is 5mm/s;
The composite piston parameter density of this embodiment's preparation is 1.9g/cm
3, to be 97Mpa, expansion coefficient be (6.7 ?7.9) * 10 to resistance to flexure
?6/ ℃, friction factor be 0.040 ?0.065, heat conductivity be 110 ?130W/mK, hardness be HB 100, for single AlSi alloy piston, wear resistance increases more than 1.6 times, 400 ? oxidation resistance in 500 ℃ of scopes improve about 1 times, alleviate with respect to the piston mass of cast iron class about 2/3,400 ? oxidation resistance in 500 ℃ of scopes improve about 1 times.
The micro-organization chart that the casting attitude composite piston of this embodiment preparation strengthens wear-resisting district as shown in Figure 4.A large amount of grizzled particles of recombination region are Al among Fig. 4
3Ti; White particle and rod-like phase are Al
3The Ni particle.
Claims (10)
1.Al
3Ti/Al
3The collaborative sial base composite piston that strengthens of Ni particle, this composite piston comprises piston only and the enhancing wearing layer that is located on piston only end and the circular groove area surfaces, the material of described piston only is silico-aluminum, it is characterized in that, the material of described enhancing wearing layer is Al
3Ti, Al
3Ni and silico-aluminum.
2. Al as claimed in claim 1
3Ti/Al
3The collaborative sial base composite piston that strengthens of Ni particle is characterized in that the material of described enhancing wearing layer is Al
3Ti particle, Al
3Ni particle, Al
3Ti particle and Al
3The intergranular silico-aluminum of Ni.
3. Al as claimed in claim 1
3Ti/Al
3The collaborative sial base composite piston that strengthens of Ni particle is characterized in that the thickness of described enhancing wearing layer is 1～5mm.
4. Al as claimed in claim 1
3Ti/Al
3The collaborative sial base composite piston that strengthens of Ni particle is characterized in that described enhancing wearing layer is to use the mol ratio of Ti and Ni to be (1～10): the Ti-Ni alloy silk preparation of (1～10).
5. Al as claimed in claim 4
3Ti/Al
3The collaborative sial base composite piston that strengthens of Ni particle is characterized in that the diameter of described Ti-Ni alloy silk is 50～150 μ m.
6. such as the described Al of the arbitrary claim of claim 1 to 5
3Ti/Al
3The collaborative preparation method who strengthens sial base composite piston of Ni particle is characterized in that the method may further comprise the steps:
Arrange graphite paper at the Piston mould inwall, place the Ti-Ni alloy silk screen at graphite paper, afterwards, under the electromagnetic field environment, cast silico-aluminum melt after silico-aluminum solidifies, stops to apply electromagnetic field in Piston mould, obtains semi-finished product;
To semi-finished product forge, heat treatment, machining and grinding process;
After above-mentioned steps, obtain finished product.
7. Al as claimed in claim 6
3Ti/Al
3The collaborative preparation method who strengthens sial base composite piston of Ni particle is characterized in that described Ti-Ni alloy silk screen is 20～100 purpose Ti-Ni alloy silk screens.
8. Al as claimed in claim 6
3Ti/Al
3The collaborative preparation method who strengthens sial base composite piston of Ni particle is characterized in that the frequency of described electromagnetic field is that 2000～3000Hz, power are 20～30KW.
9. Al as claimed in claim 6
3Ti/Al
3The collaborative preparation method who strengthens sial base composite piston of Ni particle is characterized in that, when silico-aluminum begins to solidify, reduce the intensity of electromagnetic field, and reduce gradually the power of electromagnetic field in the silico-aluminum process of setting, when treating that silico-aluminum solidifies fully, the power of electromagnetic field reduces to zero.
10. Al as claimed in claim 6
3Ti/Al
3The collaborative preparation method who strengthens sial base composite piston of Ni particle is characterized in that the method may further comprise the steps:
(1) arranges one deck graphite paper at the Piston mould inwall, again the Ti-Ni alloy silk screen is close to graphite paper and is arranged;
(2) beginning to apply frequency before the cast is that 2000～3000Hz, power are the electromagnetic field of 20～30KW, first Piston mould and Ti-Ni alloy silk screen is preheating to 200～300 ℃;
Then with the silico-aluminum melt cast of melting in Piston mould, pouring temperature is 700～760 ℃, the silico-aluminum melt flow is 5～15Kg/min;
After pouring 5～10min, the rate reduction electromagnetic field power by 3～5KW/min after silico-aluminum solidifies fully, stops to apply electromagnetic field, must cast the attitude composite piston;
(3) will cast attitude composite piston remelting to 550 ℃～570 ℃, then send in the forging die cavity of forging die machine, carry out the thixotroping forging and pressing and process, obtain forging the attitude composite piston, the interior preheating temperature of model cavity is during forging: 100～300 ℃, forging deformation speed is 5～15mm/s;
(4) will forge the attitude composite piston and under 450～500 ℃ of conditions, process 8～10h, then under 150～200 ℃ of conditions, process 3～6h;
Piston after processing through step (4) is carried out machining and polishing, obtain Al
3Ti/Al
3The collaborative sial base composite piston that strengthens of two kinds of particles of Ni.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310223926.2A CN103352978B (en) | 2013-06-06 | 2013-06-06 | Al 3ti/Al 3ni particle is collaborative strengthens sial base composite piston and preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310223926.2A CN103352978B (en) | 2013-06-06 | 2013-06-06 | Al 3ti/Al 3ni particle is collaborative strengthens sial base composite piston and preparation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103352978A true CN103352978A (en) | 2013-10-16 |
| CN103352978B CN103352978B (en) | 2015-11-04 |
Family
ID=49309375
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310223926.2A Expired - Fee Related CN103352978B (en) | 2013-06-06 | 2013-06-06 | Al 3ti/Al 3ni particle is collaborative strengthens sial base composite piston and preparation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103352978B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2538246C1 (en) * | 2013-10-24 | 2015-01-10 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "МАТИ-Российский государственный технологический университет имени К.Э. Циолковского" | Method of obtaining casting composite material based on aluminium and its alloys |
| RU2538247C1 (en) * | 2013-10-24 | 2015-01-10 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "МАТИ-Российский государственный технологический университет имени К.Э. Циолковского" | Aluminium-based cast composite and its alloys |
| CN104353814A (en) * | 2014-10-28 | 2015-02-18 | 山东滨州渤海活塞股份有限公司 | Method for manufacturing alumina fiber and titanium oxide particle-reinforced inner-cooling insert ring piston blanks |
| CN110666138A (en) * | 2019-10-28 | 2020-01-10 | 吉林大学 | High-wear-resistance piston preparation device and method |
| CN113000798A (en) * | 2021-02-23 | 2021-06-22 | 南宁智鸿技研机械技术有限公司 | Thin-wall wear-resistant aluminum alloy founding casting process |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1693507A (en) * | 2005-05-20 | 2005-11-09 | 东北轻合金有限责任公司 | Manufacturing method of aluminium alloy piston |
| JP2008127579A (en) * | 2006-11-16 | 2008-06-05 | Toyama Gokin Kk | Aluminum alloy |
| EP1978120A1 (en) * | 2007-03-30 | 2008-10-08 | Technische Universität Clausthal | Aluminium-silicon alloy and method for production of same |
| CN101446243A (en) * | 2008-12-29 | 2009-06-03 | 重庆大学 | Piston made of Al/Si-Mg*Si composite material and preparation method thereof |
| CN101463440A (en) * | 2009-01-15 | 2009-06-24 | 山东大学 | Aluminum based composite material for piston and preparation thereof |
| CN101775530A (en) * | 2010-03-04 | 2010-07-14 | 安徽省恒泰活塞制造有限公司 | Hypereutectic al-si alloy piston material |
| CN102205406A (en) * | 2011-05-11 | 2011-10-05 | 西安科技大学 | In-situ synthesized Al3Ti particle surface-reinforced aluminum-base compound cylinder sleeve and manufacturing method thereof |
| CN102392158A (en) * | 2011-11-22 | 2012-03-28 | 东北轻合金有限责任公司 | Manufacturing method of engine aluminium alloy piston die forging |
| CN102410102A (en) * | 2011-12-05 | 2012-04-11 | 重庆大学 | Authigenic Al3Ni and Si mixed particle aluminium alloy piston for local enhancement and preparation method thereof |
| CN102588136A (en) * | 2012-03-12 | 2012-07-18 | 重庆大学 | Wear-resistant aluminium alloy cylinder sleeve and preparation method thereof |
-
2013
- 2013-06-06 CN CN201310223926.2A patent/CN103352978B/en not_active Expired - Fee Related
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1693507A (en) * | 2005-05-20 | 2005-11-09 | 东北轻合金有限责任公司 | Manufacturing method of aluminium alloy piston |
| JP2008127579A (en) * | 2006-11-16 | 2008-06-05 | Toyama Gokin Kk | Aluminum alloy |
| EP1978120A1 (en) * | 2007-03-30 | 2008-10-08 | Technische Universität Clausthal | Aluminium-silicon alloy and method for production of same |
| CN101446243A (en) * | 2008-12-29 | 2009-06-03 | 重庆大学 | Piston made of Al/Si-Mg*Si composite material and preparation method thereof |
| CN101463440A (en) * | 2009-01-15 | 2009-06-24 | 山东大学 | Aluminum based composite material for piston and preparation thereof |
| CN101775530A (en) * | 2010-03-04 | 2010-07-14 | 安徽省恒泰活塞制造有限公司 | Hypereutectic al-si alloy piston material |
| CN102205406A (en) * | 2011-05-11 | 2011-10-05 | 西安科技大学 | In-situ synthesized Al3Ti particle surface-reinforced aluminum-base compound cylinder sleeve and manufacturing method thereof |
| CN102392158A (en) * | 2011-11-22 | 2012-03-28 | 东北轻合金有限责任公司 | Manufacturing method of engine aluminium alloy piston die forging |
| CN102410102A (en) * | 2011-12-05 | 2012-04-11 | 重庆大学 | Authigenic Al3Ni and Si mixed particle aluminium alloy piston for local enhancement and preparation method thereof |
| CN102588136A (en) * | 2012-03-12 | 2012-07-18 | 重庆大学 | Wear-resistant aluminium alloy cylinder sleeve and preparation method thereof |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2538246C1 (en) * | 2013-10-24 | 2015-01-10 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "МАТИ-Российский государственный технологический университет имени К.Э. Циолковского" | Method of obtaining casting composite material based on aluminium and its alloys |
| RU2538247C1 (en) * | 2013-10-24 | 2015-01-10 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "МАТИ-Российский государственный технологический университет имени К.Э. Циолковского" | Aluminium-based cast composite and its alloys |
| CN104353814A (en) * | 2014-10-28 | 2015-02-18 | 山东滨州渤海活塞股份有限公司 | Method for manufacturing alumina fiber and titanium oxide particle-reinforced inner-cooling insert ring piston blanks |
| CN110666138A (en) * | 2019-10-28 | 2020-01-10 | 吉林大学 | High-wear-resistance piston preparation device and method |
| CN110666138B (en) * | 2019-10-28 | 2023-10-20 | 吉林大学 | High-wear-resistance piston preparation device and method |
| CN113000798A (en) * | 2021-02-23 | 2021-06-22 | 南宁智鸿技研机械技术有限公司 | Thin-wall wear-resistant aluminum alloy founding casting process |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103352978B (en) | 2015-11-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101503773B (en) | Heat resisting low expansion silumin and preparation thereof | |
| CN101709414B (en) | High silicon gradient composite aluminum alloy cylinder sleeve material and preparation method thereof | |
| CN102527978B (en) | Casting and forming method for double-layer-material engine cylinder liner | |
| CN102943192B (en) | Aluminum piston manufacturing method | |
| CN103160715B (en) | A kind of Gradient Aluminium Alloy cylinder jacket material and preparation method thereof | |
| CN103352978B (en) | Al 3ti/Al 3ni particle is collaborative strengthens sial base composite piston and preparation method | |
| CN101627138A (en) | The wear-resistant aluminum alloy of power pack with liner-less cylinder is used to cast | |
| Gupta et al. | Fabrication of ceramic reinforcement aluminium and its alloys metal matrix composite materials: A review | |
| CN103042195A (en) | Extrusion casting manufacture method of piston with reinforced pseudo-alloy circular groove | |
| CN109136674A (en) | A kind of graphene rare earth scandium collaboration REINFORCED Al-Si-Mg cast aluminium alloy gold and preparation method thereof | |
| WO2021035774A1 (en) | Preparation method for lithium-containing magnesium/aluminum-based composite material | |
| Moustafa et al. | Hot forging and hot pressing of AlSi powder compared to conventional powder metallurgy route | |
| CN105200276A (en) | Method for manufacturing pseudo-alloy reinforced composite material piston with internal cooling oil cavity | |
| Chen et al. | A novel method for net-shape forming of hypereutectic Al–Si alloys by thixocasting with powder preforms | |
| Sahin et al. | Analysis of microstructures and mechanical properties of particle reinforced AlSi7Mg2 matrix composite materials | |
| CN101446243B (en) | Piston made of Al/Si-Mg*Si composite material and preparation method thereof | |
| CN105950929B (en) | Hypereutectic Al Si alloys and magnesium alloy hybrid engine cylinder body and its casting method | |
| Goni et al. | High performance automotive and railway components made from novel competitive aluminium composites | |
| Hiremath et al. | Effect of end chills, reinforcement content and carburization on the hardness of LM25-borosilicate glass particulate composite | |
| US20090277415A1 (en) | Cylinder crankcase for a motor vehicle | |
| CN100557054C (en) | Contain creep resistance Dow metal of Si and C and preparation method thereof | |
| CN102011033B (en) | Method for preparing aluminum-based gradient composite material under action of traveling wave magnetic field | |
| CN106702227A (en) | Wear-resistant aluminum alloy and preparation method thereof | |
| CN113231791A (en) | Magnesium-based composite material cylinder sleeve for motorcycle engine and preparation method thereof | |
| JP2005163145A (en) | Composite casting, iron based porous body for casting, and their production method |
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: 20151104 Termination date: 20160606 |