CN111500907A - Method for controlling full reaction of titanium and silicon carbide particles and aluminum-based cylinder sleeve prepared by method - Google Patents
Method for controlling full reaction of titanium and silicon carbide particles and aluminum-based cylinder sleeve prepared by method Download PDFInfo
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- CN111500907A CN111500907A CN202010472525.0A CN202010472525A CN111500907A CN 111500907 A CN111500907 A CN 111500907A CN 202010472525 A CN202010472525 A CN 202010472525A CN 111500907 A CN111500907 A CN 111500907A
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- C22C21/00—Alloys based on aluminium
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
- C22C21/04—Modified aluminium-silicon alloys
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
- B22D13/02—Centrifugal casting; Casting by using centrifugal force of elongated solid or hollow bodies, e.g. pipes, in moulds rotating around their longitudinal axis
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- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/0047—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents
- C22C32/0052—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents only carbides
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Abstract
The invention discloses a method for controlling titanium and silicon carbide particles to fully react and an aluminum-based cylinder sleeve prepared by the method, wherein an aluminum-based composite solution is subjected to medium-frequency electromagnetic stirring, the collision frequency of potassium fluotitanate and silicon carbide powder is increased under the action of magnetic force and repeated pulsation, the oxidation reaction process is accelerated, the quantity of fluorine salt and carbon in aluminum alloy is reduced, the particle diameter is larger and particles are easy to agglomerate after the reaction of Ti and SiC in the preparation process of silicon carbide and potassium fluotitanate, the mass ratio is larger than that of aluminum and the particles are easy to sink, so that the phenomenon that the silicon carbide is not uniform in aluminum liquid is caused, the particles of the aluminum-based composite solution are uniformly distributed and are not easy to agglomerate, the material forming effect is improved, and the microhardness and tensile strength of an aluminum; by the method for controlling the full reaction of the titanium and the silicon carbide particles, the aluminum-based casting solution is prepared into the aluminum-based cylinder sleeve according to the design requirement, so that the stress strength is uniform, the surface roughness is uniform, and the friction performance is stable.
Description
Technical Field
The invention relates to the technical field of aluminum-based composite materials, in particular to the technical field of preparation of an aluminum-based cylinder sleeve.
Background
Usually, by adding the different particle reinforced aluminum matrix composite, when preparing the aluminum matrix reinforced composite containing SiC particles, the preparation process has high requirements due to poor wettability between the SiC particles and the aluminum alloy, and at present, the powder metallurgy method, the spray deposition method, the stirring casting method and the extrusion casting method are mainly used. The prior aluminum matrix composite material has poor fluidity and difficult molding in a semi-solid state, and the application number is CN 201620262506.4: "an aluminium base compound engine cylinder liner", in its production process, the common apparatus makes potassium fluotitanate and silicon carbide powder oxidation reaction process insufficient, produce potassium fluoaluminate and carbon salt by-product in the alloying process, in addition can bring metallic compound impurity in the reaction process, the cleanliness is relatively poor, the number is too much in aluminium alloy that aluminium base compound cylinder liner remains, the third phase particle produced by the reaction, the three-phase particle can collide each other and conglutinate together in the falling process, can sink and diffuse, later conglomerate and precipitate, form a large amount of slag inclusion after shaping, the particle conglutinate diameter is great and easy to conglomerate after Ti and SiC react in the potassium titanate preparation process, the mass ratio is greater than Al, sink easily, cause the hard particle silicon carbide is inhomogeneous in the aluminium liquid, cause the aluminium base compound cylinder liner surface coarse friction unstable, the coefficient of friction increases, the ordinary production equipment can's solution, the common stirring can not be solved, the flowability of the molten aluminum is poor, and the centrifugal casting forming process technology which can not be used for products and has higher benefit is limited.
Disclosure of Invention
The invention aims to provide a method for controlling the full reaction of titanium and silicon carbide particles and an aluminum-based cylinder sleeve prepared by the method, so as to solve the technical problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the method for controlling the titanium and silicon carbide particles to fully react comprises the following steps of arranging an electromagnetic stirrer in a medium-frequency stirring electric furnace, preparing 5-20% of Si according to mass percentage, and the balance of Al, evenly stirring the mixture in a medium-frequency stirring electric furnace to form a mixture, heating the medium-frequency stirring electric furnace to 830-920 ℃, adding 15-40% of silicon carbide powder or diamond powder and 25-80% of potassium fluotitanate powder into a medium-frequency stirring electric furnace, electromagnetically stirring for 10-50min, slagging off the melt after the melt is formed in the medium-frequency stirring electric furnace, adding a phosphorus salt modifier or a phosphorus copper modifier or an aluminum strontium modifier into the slagging off melt at 720-780 ℃, then treating the aluminum alloy by using nitrogen and argon for 5 to 15 minutes to obtain the aluminum-based casting melt.
Preferably, the electromagnetic stirring parameter is 500kw of rated power, the alternating current frequency is 50-200Hz, the stirring angle is 0-100 degrees, and a silicon controlled intermediate frequency power supply is adopted.
Preferably, the granularity of the silicon carbide powder is 300-20 μm, the mass percent of Si is 12.5%, the mass percent of the silicon carbide powder is 27.5%, and the mass percent of the potassium fluotitanate powder is 52.5%.
Preferably, the temperature of the medium-frequency stirring electric furnace is 830 ℃, the electromagnetic stirring time is 50min, and the temperature of the melt after slagging-off is 720 ℃.
Preferably, the alternating current frequency is 50Hz and the stirring angle is 100 deg.
The invention also provides the aluminum-based cylinder sleeve prepared by the method for controlling the full reaction of the titanium and the silicon carbide particles.
Preferably, the blank of the aluminum-based cylinder sleeve is molded by centrifugal casting, and the parameters of the centrifugal casting molding process comprise the temperature of a mold ranging from 250 ℃ to 350 ℃, the centrifugal rotation speed ranging from 2000 ℃ to 3500r/min and the pouring temperature ranging from 680 ℃ to 800 ℃.
Preferably, the centrifugal casting molding process parameters are that the mold temperature is 300 ℃, the centrifugal rotating speed is 2750r/min and the pouring temperature is 740 ℃.
Preferably, rough turning and finish turning are carried out on a blank of the aluminum-based cylinder sleeve according to the design size, then honing and etching and polishing treatment are carried out on the inner wall of the cylinder sleeve by using a Na0H solution with the solute mass fraction of 3-12%, and the aluminum-based composite cylinder sleeve is obtained.
Preferably, the solute mass fraction of the Na0H solution is 7.5%.
Compared with the prior art, the invention has the beneficial effects that:
1. the method for controlling the titanium and silicon carbide particles to fully react through the optimization of the orthogonal test disclosed by the invention has the advantages that the aluminum-based composite solution is subjected to medium-frequency electromagnetic stirring, the collision frequency of potassium fluotitanate and silicon carbide powder is increased through the action of magnetic force and repeated pulsation, the oxidation reaction process is accelerated, the quantity of fluorine salt and carbon in aluminum alloy is reduced, the particle diameter is larger and particles are easy to agglomerate after the reaction of Ti and SiC in the preparation process of silicon carbide and potassium fluotitanate, the mass ratio is larger than that of aluminum and the particles are easy to sink, so that the phenomenon that the silicon carbide is not uniform in the aluminum solution is caused, the particles of the aluminum-based composite solution are uniformly distributed and are not easy to agglomerate, the material forming effect is improved, and the microhardness and the tensile strength;
2. by the method for controlling the titanium and silicon carbide particles to react fully, the aluminum-based casting solution is prepared into the aluminum-based cylinder sleeve according to the design requirement through optimization of a response surface method, the stress strength is uniform, the surface roughness is uniform, and the friction performance is stable.
Drawings
FIG. 1 is a graph showing the response surface curve of the interaction of the temperature of the die and the centrifugal rotating speed to the abrasion coefficient of the aluminum-based composite cylinder sleeve prepared by the invention.
FIG. 2 is a graph showing the response surface curve of the interaction between the mold temperature and the casting temperature on the wear coefficient of the aluminum-based composite cylinder sleeve prepared by the invention.
FIG. 3 is a graph showing the response surface curve of the interaction of the mold temperature and the solute mass fraction of Na0H solution on the wear coefficient of the aluminum-based composite cylinder sleeve prepared by the invention.
FIG. 4 is a graph showing the response surface curve of the interaction of centrifugal rotation speed and casting temperature to the wear coefficient of the aluminum-based composite cylinder sleeve prepared by the invention.
FIG. 5 is a graph showing the response surface curve of the interaction of centrifugal rotating speed and Na0H solution solute mass fraction on the wear coefficient of the aluminum-based composite cylinder sleeve prepared by the invention.
FIG. 6 is a graph showing the response surface of the interaction between the pouring temperature and the solute mass fraction of the Na0H solution to the wear coefficient of an aluminum-based composite cylinder liner prepared according to the present invention.
FIG. 7 is a surface view of an aluminum-based cylinder liner prepared using a conventional aluminum-based composite solution method and a conventional electric furnace according to the present invention;
FIG. 8 is a surface view of an aluminum-based cylinder liner prepared by the method for controlling the sufficient reaction of titanium and silicon carbide particles provided by the present invention;
FIG. 9 is a perspective view of an aluminum-based cylinder liner product prepared by the method for controlling the sufficient reaction of titanium and silicon carbide particles provided by the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The medium-frequency stirring electric furnace, the electromagnetic stirrer, Si, Al, silicon carbide powder, diamond powder, potassium fluotitanate powder, a phosphorus salt modifier, a phosphorus copper modifier, an aluminum strontium modifier, nitrogen, argon, a silicon controlled rectifier medium-frequency power supply and a Na0H solution adopted by the invention can be purchased or customized through public channels.
Example 1: method for controlling full reaction of titanium and silicon carbide particles
The method for controlling the titanium and silicon carbide particles to fully react comprises the following steps of arranging an electromagnetic stirrer in a medium-frequency stirring electric furnace, preparing 5-20% of Si according to mass percentage, and the balance of Al, evenly stirring the mixture in a medium-frequency stirring electric furnace to form a mixture, heating the medium-frequency stirring electric furnace to 830-920 ℃, adding 15-40% of silicon carbide powder or diamond powder and 25-80% of potassium fluotitanate powder into a medium-frequency stirring electric furnace, electromagnetically stirring for 10-50min, slagging off the melt after the melt is formed in the medium-frequency stirring electric furnace, adding a phosphorus salt modifier or a phosphorus copper modifier or an aluminum strontium modifier into the slagging off melt at 720-780 ℃, then treating the aluminum alloy by using nitrogen and argon for 5 to 15 minutes to obtain the aluminum-based casting melt.
Preferably, the electromagnetic stirring parameter is 500kw of rated power, the alternating current frequency is 50-200Hz, the stirring angle is 0-100 degrees, and a silicon controlled intermediate frequency power supply is adopted.
Preferably, the alternating current frequency is 50Hz and the stirring angle is 100 deg.
Preferably, the granularity of the silicon carbide powder is 300-20 μm.
Example 2: method for controlling full reaction of titanium and silicon carbide particles
The method for controlling the titanium and silicon carbide particles to fully react comprises the following steps of arranging an electromagnetic stirrer in a medium-frequency stirring electric furnace, preparing 5% of Si and the balance of Al according to mass percent, uniformly stirring the mixture in the medium-frequency stirring electric furnace, heating the medium-frequency stirring electric furnace to 830 ℃, adding 15% of silicon carbide powder and 25% of potassium fluotitanate powder into the medium-frequency stirring electric furnace, electromagnetically stirring the mixture for 10min, slagging the molten liquid after the molten liquid is formed in the medium-frequency stirring electric furnace, adding a phosphorus salt modifier into the slagging molten liquid at 720 ℃, and then treating the molten liquid for 5 min by using nitrogen and argon to obtain the aluminum-based casting molten liquid.
Example 3: method for controlling full reaction of titanium and silicon carbide particles
The method for controlling the titanium and silicon carbide particles to fully react comprises the following steps of arranging an electromagnetic stirrer in a medium-frequency stirring electric furnace, preparing 12.5% of Si and the balance of Al according to mass percent, uniformly stirring the mixture in the medium-frequency stirring electric furnace, heating the medium-frequency stirring electric furnace to 875 ℃, adding 27.5% of silicon carbide powder and 52.5% of potassium fluotitanate powder into the medium-frequency stirring electric furnace, electromagnetically stirring for 30min, slagging the molten liquid after forming the molten liquid in the medium-frequency stirring electric furnace, adding a phosphorus-copper modifier into the slagging molten liquid at the temperature of 750 ℃, and then treating for 10min by using nitrogen and argon to obtain the aluminum-based casting molten liquid.
Example 4: method for controlling full reaction of titanium and silicon carbide particles
The method for controlling the titanium and silicon carbide particles to fully react comprises the following steps of arranging an electromagnetic stirrer in a medium-frequency stirring electric furnace, preparing 5% of Si and the balance of Al according to mass percent, uniformly stirring the mixture in the medium-frequency stirring electric furnace, heating the medium-frequency stirring electric furnace to 920 ℃, adding silicon carbide powder with the mass ratio of 40% of the mixture and potassium fluotitanate powder with the mass ratio of 80% of the mixture into the medium-frequency stirring electric furnace, electromagnetically stirring for 1min, slagging off molten liquid after forming molten liquid in the medium-frequency stirring electric furnace, adding an aluminum strontium modifier into the slagging-off molten liquid at 780 ℃, and then treating for 8 min by using nitrogen and argon to obtain aluminum-based casting molten liquid.
Example 5: method for controlling full reaction of titanium and silicon carbide particles
The method for controlling the titanium and silicon carbide particles to fully react comprises the following steps of arranging an electromagnetic stirrer in a medium-frequency stirring electric furnace, preparing 20% of Si and the balance of Al according to mass percent, uniformly stirring the mixture in the medium-frequency stirring electric furnace, heating the medium-frequency stirring electric furnace to 830 ℃, adding 15% of silicon carbide powder and 25% of potassium fluotitanate powder into the medium-frequency stirring electric furnace, electromagnetically stirring the mixture for 50 minutes, slagging the molten liquid after the molten liquid is formed in the medium-frequency stirring electric furnace, adding a phosphorus salt modifier into the slagging molten liquid at 720 ℃, and then treating the molten liquid with nitrogen and argon for 11 minutes to obtain the aluminum-based casting molten liquid.
Example 6: method for controlling full reaction of titanium and silicon carbide particles
The method for controlling the titanium and silicon carbide particles to fully react comprises the following steps of arranging an electromagnetic stirrer in a medium-frequency stirring electric furnace, preparing 20% of Si and the balance of Al according to mass percent, uniformly stirring the mixture in the medium-frequency stirring electric furnace, heating the medium-frequency stirring electric furnace to 920 ℃, adding silicon carbide powder or diamond powder with the mass ratio of 40% of the mixture and potassium fluotitanate powder with the mass ratio of 80% of the mixture into the medium-frequency stirring electric furnace, electromagnetically stirring for 50min, slagging off the molten liquid after forming the molten liquid in the medium-frequency stirring electric furnace, adding an aluminum strontium modifier into the slagging-off molten liquid at 780 ℃, and then treating the molten liquid with nitrogen and argon for 15 min to obtain aluminum-based casting molten liquid.
Example 7: optimization of method for controlling full reaction of titanium and silicon carbide particles
1. Method for controlling full reaction of titanium and silicon carbide particles through orthogonal optimization
On the basis of the embodiments 2 to 6, a single-factor experiment is designed, and the influence of the mass percent of Si, the mass percent of silicon carbide powder, the mass percent of potassium fluotitanate powder and the electromagnetic stirring time on the abrasion loss of the aluminum-based cylinder sleeve prepared by controlling the full reaction of titanium and silicon carbide particles under the conditions of 10N load and the same abrasion by the aluminum-based casting melt is respectively explored. A four-factor three-level orthogonal experiment is carried out on the basis of a single-factor experiment, and the factors and levels of the orthogonal experiment are shown in a table 7.1. According to the 10N load of a commercially available aluminum-based composite cylinder sleeve made of 4.5Mg material, the abrasion loss under the same abrasion condition is divided by the abrasion loss value of the aluminum-based composite cylinder sleeve obtained by the test method to be used as the test evaluation index, namely the abrasion coefficient.
TABLE 7.1 orthogonal test factors and levels
Orthogonal optimization control of the method for fully reacting titanium and silicon carbide particles comprises the following steps:
TABLE 7.2 orthogonal test results and analysis
From table 7.2, it can be seen that within the range of the experimental design, the electromagnetic stirring time D has the greatest influence on the wear coefficient of the aluminum-based cylinder liner prepared by controlling the full reaction of titanium and silicon carbide particles, and then the mass percentage of Si, the mass percentage of silicon carbide powder B and the mass percentage of potassium fluotitanate powder C. The best test parameters for the method of controlling the titanium and silicon carbide particles to react fully are A3B1C1D3, namely 5-20% of Si, 15-40% of silicon carbide powder, 25-80% of potassium fluotitanate powder and electromagnetic stirring for 10-50min, preferably 20% of Si, 15% of silicon carbide powder, 25% of potassium fluotitanate powder and electromagnetic stirring for 50 min.
Example 8: aluminum-based cylinder sleeve prepared by method for controlling full reaction of titanium and silicon carbide particles
An aluminum-based cylinder liner was prepared using the method described in example 1 to control the full reaction of the titanium and silicon carbide particles. The blank of the aluminum-based cylinder sleeve is molded by centrifugal casting, and the parameters of the centrifugal casting molding process comprise the temperature of a mold ranging from 250 ℃ to 350 ℃, the centrifugal rotation speed of 2000 ℃ to 3500r/min and the pouring temperature of 680 ℃ to 800 ℃. And carrying out rough turning and finish turning on the blank of the aluminum-based cylinder sleeve according to the design size, honing, and carrying out etching and polishing treatment on the inner wall of the cylinder sleeve by using a Na0H solution with the solute mass fraction of 3-12% to obtain the aluminum-based composite cylinder sleeve.
Example 9: aluminum-based cylinder sleeve prepared by method for controlling full reaction of titanium and silicon carbide particles
An aluminum-based cylinder liner was prepared using the method described in example 1 to control the full reaction of the titanium and silicon carbide particles. The blank of the aluminum-based cylinder sleeve is formed by centrifugal casting, and the technological parameters of the centrifugal casting include the temperature of a die of 250 ℃, the centrifugal rotation speed of 2000r/min and the pouring temperature of 680 ℃. And carrying out rough turning and finish turning on the blank of the aluminum-based cylinder sleeve according to the design size, honing, and carrying out etching and polishing treatment on the inner wall of the cylinder sleeve by using a Na0H solution with the solute mass fraction of 3% to obtain the aluminum-based composite cylinder sleeve.
Example 10: aluminum-based cylinder sleeve prepared by method for controlling full reaction of titanium and silicon carbide particles
An aluminum-based cylinder liner was prepared using the method described in example 1 to control the full reaction of the titanium and silicon carbide particles. The blank of the aluminum-based cylinder sleeve is formed by centrifugal casting, and the technological parameters of the centrifugal casting include the temperature of the die being 325 ℃, the centrifugal rotating speed being 3125r/min and the pouring temperature being 710 ℃. And carrying out rough turning and finish turning on the blank of the aluminum-based cylinder sleeve according to the design size, honing, and carrying out etching and polishing treatment on the inner wall of the cylinder sleeve by using a Na0H solution with the solute mass fraction of 5.25% to obtain the aluminum-based composite cylinder sleeve.
Example 11: aluminum-based cylinder sleeve prepared by method for controlling full reaction of titanium and silicon carbide particles
An aluminum-based cylinder liner was prepared using the method described in example 1 to control the full reaction of the titanium and silicon carbide particles. The blank of the aluminum-based cylinder sleeve is formed by centrifugal casting, and the technological parameters of the centrifugal casting include the temperature of the die being 300 ℃, the centrifugal rotating speed being 2750r/min and the pouring temperature being 740 ℃. And carrying out rough turning and finish turning on the blank of the aluminum-based cylinder sleeve according to the design size, honing, and carrying out etching and polishing treatment on the inner wall of the cylinder sleeve by using a Na0H solution with the solute mass fraction of 7.5% to obtain the aluminum-based composite cylinder sleeve.
Example 12: aluminum-based cylinder sleeve prepared by method for controlling full reaction of titanium and silicon carbide particles
An aluminum-based cylinder liner was prepared using the method described in example 1 to control the full reaction of the titanium and silicon carbide particles. The blank of the aluminum-based cylinder sleeve is formed by centrifugal casting, and the technological parameters of the centrifugal casting include the temperature of the die 275 ℃, the centrifugal rotating speed of 2375r/min and the pouring temperature of 770 ℃. And carrying out rough turning and finish turning on the blank of the aluminum-based cylinder sleeve according to the design size, honing, and carrying out etching and polishing treatment on the inner wall of the cylinder sleeve by using a Na0H solution with the solute mass fraction of 9.75% to obtain the aluminum-based composite cylinder sleeve.
Example 13: aluminum-based cylinder sleeve prepared by method for controlling full reaction of titanium and silicon carbide particles
An aluminum-based cylinder liner was prepared using the method described in example 1 to control the full reaction of the titanium and silicon carbide particles. The blank of the aluminum-based cylinder sleeve is formed by centrifugal casting, and the technological parameters of the centrifugal casting include the temperature of the die being 350 ℃, the centrifugal rotation speed being 3500r/min and the pouring temperature being 800 ℃. And carrying out rough turning and finish turning on the blank of the aluminum-based cylinder sleeve according to the design size, honing, and carrying out etching and polishing treatment on the inner wall of the cylinder sleeve by using a Na0H solution with the solute mass fraction of 12% to obtain the aluminum-based composite cylinder sleeve.
Example 14: optimization of aluminum-based cylinder liner prepared by method for controlling full reaction of titanium and silicon carbide particles
On the basis of the examples 9-13, the response surface method is used for optimizing and controlling the aluminum-based cylinder sleeve prepared by the method for fully reacting titanium and silicon carbide particles, and the response surface test factors and levels are shown in a table 14.1:
TABLE 14.1 response surface test factors and horizon table
Response surface test design and results:
experimental design analysis was performed according to Box-Benhnken center combinatorial design principles, and the results are shown in Table 14.2. Fitting the experimental data of the table 14.2 by adopting a multivariate fitting method through a design expert8.0.5 to obtain a quadratic polynomial regression model of the wear coefficient Y of the aluminum-based composite cylinder sleeve prepared by the invention to the mold temperature (A), the centrifugal rotating speed (B), the pouring temperature (C) and the solute mass fraction (D) as follows:
Y＝+4.24+0.058*A+0.042*B+0.017*C+0.033*D-0.025*A*B+0.28*A*C+0.075*A*D+0.18*B*C+0.28*B*D-0.10*C*D-0.40*A^2-0.85*B^2-0.82*C^2-0.72*D^2
TABLE 14.2 response surface test design and results
The interaction of the factors in the response surface analysis is described in detail with reference to figures 1 to 6. According to the optimization result of the response surface, the centrifugal casting molding process parameters of the mold temperature of 250-350 ℃, the centrifugal rotation speed of 2000-3500r/min and the pouring temperature of 680-800 ℃ are preferably the mold temperature of 300 ℃, the centrifugal rotation speed of 2750r/min and the pouring temperature of 740 ℃, and the Na0H solution parameter with the solute mass fraction of 3-12% is preferably 7.5%. The surface diagram of the aluminum-based cylinder sleeve prepared by adopting the traditional aluminum-based composite solution method and the traditional electric heating furnace is shown in figure 7, the diagram of the aluminum-based composite cylinder sleeve product prepared by the invention through an orthogonal test and a response surface method is shown in figures 8-9, the method for controlling the titanium and silicon carbide particles to fully react disclosed by the invention can be obtained through comparison, and the aluminum-based casting solution is prepared into the aluminum-based cylinder sleeve according to the design requirement through the response surface method optimization, so that the stress strength is uniform, the surface roughness is uniform, and the friction performance is stable.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A method for controlling the full reaction of titanium and silicon carbide particles comprises the following steps:
setting an electromagnetic stirrer in a medium-frequency stirring electric furnace, preparing 5-20% of Si and the balance of Al according to mass percent, uniformly stirring the Si and the balance of Al in the medium-frequency stirring electric furnace to form a mixture, heating the medium-frequency stirring electric furnace to 830-920 ℃, adding 15-40% of silicon carbide powder or diamond powder and 25-80% of potassium fluotitanate powder according to the mass ratio into the medium-frequency stirring electric furnace, electromagnetically stirring for 10-50min, slagging off the molten liquid after forming the molten liquid in the medium-frequency stirring electric furnace, adding a phosphorus salt modifier or a phosphorus copper modifier or an aluminum strontium modifier into the slagging-off molten liquid at 720-780 ℃, and then treating the molten liquid for 5-15 min by using nitrogen and argon to obtain the aluminum-based casting molten liquid.
2. The method of claim 1, wherein the reaction between the titanium and silicon carbide particles is controlled by: the electromagnetic stirring parameters are 500kw of rated power, the alternating current frequency is 50-200Hz, the stirring angle is 0-100 degrees, and a silicon controlled intermediate frequency power supply is adopted.
3. The method of claim 1, wherein the reaction between the titanium and silicon carbide particles is controlled by: the granularity of the silicon carbide powder is 300-20 microns, the mass percent of Si is 20%, the mass percent of the silicon carbide powder is 15%, and the mass percent of potassium fluotitanate powder is 25%.
4. The method for controlling the full reaction of the titanium and the silicon carbide particles and the aluminum-based cylinder sleeve prepared by the method as claimed in claim 1, are characterized in that: the temperature rise of the medium-frequency stirring electric furnace is 830 ℃, the electromagnetic stirring time is 50min, and the melt temperature after slagging-off is 720 ℃.
5. The method for controlling the full reaction of the titanium and the silicon carbide particles and the aluminum-based cylinder sleeve prepared by the method as claimed in claim 2, are characterized in that: the alternating current frequency is 50Hz, and the stirring angle is 100 degrees.
6. An aluminum-based cylinder liner made using the method of claim 1 for controlling the substantial reaction of titanium and silicon carbide particles.
7. The aluminum-based cylinder liner as defined in claim 6, wherein: the blank of the aluminum-based cylinder sleeve is molded by centrifugal casting, and the parameters of the centrifugal casting molding process comprise the temperature of a mold ranging from 250 ℃ to 350 ℃, the centrifugal rotation speed of 2000 ℃ to 3500r/min and the pouring temperature of 680 ℃ to 800 ℃.
8. The aluminum-based cylinder liner as defined in claim 7, wherein: the centrifugal casting molding process parameters are that the mold temperature is 300 ℃, the centrifugal rotating speed is 2750r/min and the pouring temperature is 740 ℃.
9. An aluminium-based cylinder liner according to claims 7-8, characterized in that: and carrying out rough turning and finish turning on the blank of the aluminum-based cylinder sleeve according to the design size, honing, and carrying out etching and polishing treatment on the inner wall of the cylinder sleeve by using a Na0H solution with the solute mass fraction of 3-12% to obtain the aluminum-based composite cylinder sleeve.
10. The aluminum-based cylinder liner as defined in claim 9, wherein: the solute mass fraction of the Na0H solution is 7.5%.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0892075A1 (en) * | 1997-07-17 | 1999-01-20 | Yamaha Hatsudoki Kabushiki Kaisha | Aluminium alloy for a piston and method of manufacturing a piston |
| CN107649658A (en) * | 2017-07-25 | 2018-02-02 | 中原内配集团安徽有限责任公司 | A kind of preparation technology of aluminium alloy type cylinder sleeve |
| CN110229977A (en) * | 2019-06-11 | 2019-09-13 | 周凡 | A kind of particle enhances the preparation method of high Al-Si metal matrix composite |
-
2020
- 2020-05-29 CN CN202010472525.0A patent/CN111500907A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0892075A1 (en) * | 1997-07-17 | 1999-01-20 | Yamaha Hatsudoki Kabushiki Kaisha | Aluminium alloy for a piston and method of manufacturing a piston |
| CN107649658A (en) * | 2017-07-25 | 2018-02-02 | 中原内配集团安徽有限责任公司 | A kind of preparation technology of aluminium alloy type cylinder sleeve |
| CN110229977A (en) * | 2019-06-11 | 2019-09-13 | 周凡 | A kind of particle enhances the preparation method of high Al-Si metal matrix composite |
Non-Patent Citations (1)
| Title |
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| 邹广严主编: "《能源大辞典》", 31 January 1997, 四川科学技术出版社 * |
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