CN102205406B - In-situ synthesized Al3Ti particle surface-reinforced aluminum-base compound cylinder sleeve and manufacturing method thereof - Google Patents
In-situ synthesized Al3Ti particle surface-reinforced aluminum-base compound cylinder sleeve and manufacturing method thereof Download PDFInfo
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- CN102205406B CN102205406B CN2011101214610A CN201110121461A CN102205406B CN 102205406 B CN102205406 B CN 102205406B CN 2011101214610 A CN2011101214610 A CN 2011101214610A CN 201110121461 A CN201110121461 A CN 201110121461A CN 102205406 B CN102205406 B CN 102205406B
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Abstract
The invention belongs to the field of preparation of metallic matrix composites and particularly relates to an in-situ synthesized Al3Ti intermetallic compound particle-reinforced aluminum-base compound cylinder sleeve and a manufacturing method thereof. The method comprises the following steps: on the basis of taking a titanium wire net as a raw material for synthesizing a reinforcement, utilizing a casting method to prepare the titanium wire net into a titanium wire net enhanced aluminum-base composite the inner surface of which is 1-3mm in thickness; quickly melting the material by using a laser cladding method; forming a 1-3mm thick Al3Ti intermetallic compound particle-reinforced aluminum-base composite on the inner surface of a cylinder sleeve; and finally acquiring an end-product aluminum-base compound cylinder sleeve after performing heat treatment, machining treatment and polishing treatment. Compared with the traditional cast iron cylinder sleeve, the compound cylinder sleeve manufactured by using the method has the advantages that the weight is reduced by 2-3 times and the microscopic structure is compact. The compound layer of the cylinder sleeve provided by the invention has Brinell hardness (HB) larger than 80. The cylinder sleeve has the advantages of better toughness and better oxidation resistance and wear-resisting property.
Description
Technical field
The invention belongs to the metal-base composites preparation field, be specifically related to the synthetic Al of a kind of original position
3Particle reinforced aluminium-based composite cylinder jacket of Ti and preparation method thereof.
Background technology
In recent years; Along with the light-weighted development of vehicle; Increasing vehicle motor has adopted the alumina-base material engine, and cylinder generally includes cylinder body and cylinder sleeve two parts as building block important in the engine; Generally be that cylinder body and cylinder sleeve are processed respectively, and then cylinder sleeve is fitted closely in the cylinder body.Between cylinder sleeve and the pistons reciprocating, the phenomenon that often causes the spacing of the two to strengthen with friction, wearing and tearing, high-temperature oxydation etc. causes the cylinder effect to reduce, so the performance of cylinder jacket quality, has directly determined the life-span of cylinder.And the inefficacy of cylinder jacket causes because of surface, inferior surface or because of surface factor mostly; If can strengthen to the working surface of cylinder jacket; Strengthen its wear-resisting, high temperature resistant, decay resistance, will prolong the service life of cylinder jacket, thereby prolong the life-span of cylinder.
The past cylinder jacket often adopts high-quality casting pig, in order to improve the wearability of cylinder jacket, is employed in a spot of alloying element of adding in the cast iron, obtains high quality cast iron like nickel, aluminium, chromium, phosphorus etc.Adopt the method that is bumped into to be embedded in the cylinder block of making by aluminium alloy the cylinder sleeve that processes, not only alleviated weight but also improved wearability, can prolong lining life greatly.However, think also in the industry that the quality of the cylinder liner of cast iron class is big, operation need consume more energy, is difficult to satisfy the growth requirement of following lightweight automobile.For this reason; The researcher adopts the method for plating wearing layer to alleviate quality and the high temperature abrasion resistance that improves cylinder jacket; Promptly strengthen, adopt various surface engineering technologies, like laser quenching, plasma quenching, thermal spraying and other various process for treating surface at light-weighted inner surface of cylinder liner.Should, the application of these advanced technologies on cylinder jacket material can improve the mar proof of cylinder sleeve really effectively, but owing to there are various technical problems, fails all the time in industry to be applied on a large scale.Mainly show: only improve processing layer intensity, the cylinder jacket tensile property is almost had no effect; Processing layer can't reach the gratifying degree of depth, and the processing layer handling property is uneven, and being difficult to provides stable working environment for engine; Processing cost is big, work efficiency is low, is difficult to adapt to production demand; Environment is existed the pollution problem that is difficult to overcome; Can't solve the cavitation pitting problem in the cylinder jacket.This type of technological representational achievement in research as: Chinese patent 91107625.4 and 200720092917.4 adopts the method for compound plating to plate one deck ceramic composite plating layer on the inwall of aluminium alloy cylinder body body; Can improve wearability, high-temperature behavior, the life-saving of cylinder jacket to a certain extent; But the particle method that adds is all adopted in the adding that strengthens body in the plating method; Strengthening the surface in the process is prone to pollute; The adhesion that strengthens body and matrix is poor, in the use, very easily causes to strengthen coming off of body.
Summary of the invention
Defective or deficiency to prior art exists the objective of the invention is to: combine Al
3The characteristic of Ti provides a kind of original position to synthesize Al
3The Ti intermetallic compound particle strengthens the preparation method of aluminium base composite cylinder jacket, with wearability and the high-temperature mechanical property that improves cylinder jacket greatly.
For realizing above-mentioned task, the present invention takes following technical solution:
A kind of original position is synthesized Al
3The Ti particle surface strengthens the preparation method of aluminium base composite cylinder jacket, it is characterized in that, this method realizes through the following step:
Step 1, processing titanium silk silk screen precast body:
Be that to be compiled into the mesh specification be 20 orders～100 purpose titanium silk silk screens for the titanium silk of 50 μ m～150 μ m earlier with diameter; Treat thickness, the shape and size of enhancement region then according to interior surface of cylinder liner; Select the titanium silk silk screen of the suitable number of plies; And with its carry out cutting, roll or with its cutting, stack, roll into titanium silk silk screen precast body cylindraceous, titanium silk silk screen precast body is wherein processed by 1～3 layer of titanium silk silk screen;
According to the shape and the size of cylinder jacket, the cast iron mould of processing die casting cylinder jacket;
Earlier graphite paper is arranged in the cast iron mould of die casting cylinder jacket; Then the titanium silk silk screen precast body that obtains in the step 1 is arranged on the graphite paper; Titanium silk silk screen precast body present position in the cast iron mould of die casting cylinder jacket is that interior surface of cylinder liner is treated the position of enhancement region in the cast iron mould of die casting cylinder jacket, obtains being furnished with the cast iron mould of the die casting cylinder jacket of titanium silk silk screen precast body;
Step 4, melting cylinder jacket matrix material:
According to the requirement of cylinder jacket matrix material material, confirm the chemical composition of alumina-base material, and carry out melting, obtain the cylinder jacket matrix material of fusion;
In pouring temperature is that 750 ℃～800 ℃, mold temperature are that 150 ℃～200 ℃, low pressure firing rate degree are that 0.2m/s～0.3m/s, high injection speed 2.0m/s～2.6m/s, low pressure are under the condition of 40Mpa～50Mpa, high-pressure 80Mpa～100Mpa; With the cylinder jacket matrix material die casting of fusion in the cast iron mould of the interior die casting cylinder jacket that is furnished with titanium silk silk screen precast body; Be cooled to room temperature then, obtain the cylinder jacket semi-finished product;
Step 6, the Al of the synthesizing aluminum-based composite cylinder jacket of Laser Cladding in-situ
3Ti particle enhancement layer:
, lasing beam diameter adopts argon shield, sweep speed 3mms when being 2mm～3mm, cladding
-1～4mms
-1Condition under utilize laser that cylinder jacket semi-finished product inner surface is treated that the enhancement region melts, then these cylinder jacket semi-finished product are naturally cooled to room temperature, obtain Al
3The aluminium base composite cylinder jacket semi-finished product that the Ti particle strengthens;
Step 7, heat treatment:
The cylinder jacket semi-finished product that will process through step 6 are at 500 ℃～550 ℃ condition held 10h～12h, then at room temperature place minimum 8h, then at 150 ℃～200 ℃ condition held 4h～8h;
Step 8, machining is handled with polishing:
Cylinder jacket semi-finished product to getting through step 7 processing carry out machinery, polishing processing, obtain the synthetic Al of final original position
3The Ti particle surface strengthens aluminium base composite cylinder jacket.
Another object of the present invention provides the synthetic Al of a kind of original position
3The Ti particle surface strengthens aluminium base composite cylinder jacket.The concrete technical scheme that adopts is following:
According to the synthetic Al of above-mentioned original position
3The Ti particle surface strengthens the prepared cylinder jacket of preparation method of aluminium base composite cylinder jacket.
Compared with prior art, the present invention has following advantage:
(1) strengthening body is evenly distributed: the titanium silk silk screen of micron order diameter is that reaction in-situ generates equally distributed Al
3The Ti reinforced particulate is laid a good foundation.
(2) the microscopic structure density is high: extrusion process can be guaranteed the compactness of microscopic structure and the high strength of foundry goods.
(3) grain refinement: the quick cooling of laser cladding layer, but crystal grain thinning, and the heat affected area is minimum, and workpiece deformation is minimum.
(4) it is strong with basal body binding force to strengthen body: the synthetic enhancing body of original position can guarantee significantly matrix with strengthen between body the interface totally, combine firm; Can transmit stress very effectively; Guarantee the wearability of composite and the performance of high-temperature mechanical property, and then prolong the service life of cylinder jacket.
(4) light weight: cylinder sleeve is not selected alloy cast iron for use, all is made up of light metal, greatly reduces the quality of cylinder sleeve.
(5) non-oxidizability is strong: a large amount of Al is contained on the surface of composite cylinder jacket
3Ti strengthens body, when high temperature, form fine and close aluminum oxide film, but not the hybrid films of aluminium oxide and titanium oxide shows the good oxidization resistance ability.
(6) improved the toughness of titanium-aluminium alloy: the Al that reaction in-situ is synthetic
3Ti strengthens body can change L into through the alloying element in the matrix (for example: copper, chromium etc.)
12Structure, the Al after the alloying
3The room temperature fragility of Ti has had bigger change, thereby improves the toughness of composite.
(7) wearability is good: a large amount of Al
3Ti strengthen body except with matrix preferably the adhesion, also have higher hardness, so the wearability of composite bed improves greatly.
(8) strengthening body is graininess and fibrous two kinds, so composite has particle enhancing and fibre-reinforced characteristic concurrently, fiber reinforcement will improve the tensile strength of composite.
(9) when die casting, between titanium silk silk screen precast body and cast iron mould, arrange graphite paper, can avoid the adhesion of melt and mould, prevent because of causing die-cast product rough after connecting.
Description of drawings
Fig. 1 is preparation technology's flow chart of the present invention;
Die casting sketch map when Fig. 2 is die casting, horizontal arrow is represented the direction of die casting among the figure;
Fig. 3 is in the embodiment 2 preparation processes during as cast condition, in be cast with titanium silk silk screen precast body aluminium base composite cylinder jacket treat the structural representation of enhancement region;
Fig. 4 a is the microscopic structure of the titanium silk silk screen reinforced aluminum matrix composites of as cast condition after the die casting of embodiment 2; Fig. 4 b is Ti element scanning in the microscopic structure among Fig. 4 a; Fig. 4 c is the Al element scanning of the microscopic structure among Fig. 4 a;
Fig. 5 is the aluminium base composite cylinder jacket enhancement region structural representation behind laser melting coating among the embodiment 2;
Fig. 6 is the microscopic structure of the composite cylinder jacket enhancement region behind embodiment 3 laser melting coatings, and wherein, Fig. 6 a is the microscopic structure of low multiple; Fig. 6 b is for strengthening the multiplication factor microscopic structure of body region;
Each coded representation among the figure: 1-titanium silk silk screen precast body; The typing of mold during 2-die casting; The mold ejector half of 3-die casting; The enhancement region of as cast condition after the 4-die casting; The non-enhancement region of 5-; The enhancement region of 6-behind laser melting coating.
Below in conjunction with embodiment and accompanying drawing the present invention is done further detailed description.
The specific embodiment
The present invention adopts Al
3The Ti particle is following as the reinforcing material reason of aluminium base composite cylinder jacket: Ti-Al series intermetallic compound particle proportion is little; Have higher hardness, higher serviceability temperature and elevated temperature strength; Anticorrosive preferably, the frictional behaviour of resistance to wearing; Being potential high-temperature structural material, purposes is preferably being arranged aspect internal combustion engine and the Aero-Space, also is good composite material reinforcement body material simultaneously.The Ti-Al series intermetallic compound mainly comprises Ti
3Al, TiAl and Al
3Three kinds of Ti.Wherein, Ti
3The Al crystal structure is six side's phases, belongs to the fragility phase, and its fragility is because DO
19Structure independence slip system is less than five to be caused; TiAl has the L in four directions
1Structure, it also has room temperature fragility, but it has higher intensity and fracture toughness; Al
3Ti is orderly tetragonal DO
22Type is the fragility phase under the room temperature.Areal concentration functional (LDF) theoretical research shows Al
3Ti can change L into through adding alloying element
12Structure.Because L
12Structure has more slip system, thereby makes Al after the alloying
3The room temperature fragility of Ti has had bigger change.Strengthening body Material Selection principle from in-situ composite sees: Ti
3Al and TiAl are too high owing to containing the Ti amount, need under higher Ti content, could generate thereby be not suitable for during reaction in-situ to strengthen body material, Al as original position
3It is lower that the Ti intermetallic compound contains the Ti amount, and reaction in-situ generation easily is that very good original position strengthens the body material.In several kinds of intermetallic compounds that Ti-Al system forms, has only Al
3The oxide film that Ti forms in oxidizing atmosphere is simple Al
2O
3Film, all the other several kinds sulls that form are Al
2O
3And TiO
2Mixture, introduce material below the sull opposing film of mixed type according to document and continue oxidability and be far smaller than simple Al
2O
3Its material beneath of film opposing continues the ability of oxidation.That is to say to have only Al
3The antioxygenic property of Ti particle is best.
As shown in Figure 1, preparation method of the present invention, adopt the following step to realize:
Step 1; Processing titanium silk silk screen precast body: be that to be compiled into the mesh specification be 20 orders-100 order titanium silk silk screen for the titanium silk of 50 μ m-150 μ m with diameter earlier; Treat thickness, shape and the size of enhancement region then according to interior surface of cylinder liner; The titanium silk silk screen of intercepting certain-length, width; It is rolled be processed into titanium silk silk screen precast body cylindraceous, should treat that the thickness of enhancement region confirms the number of plies of the titanium silk silk screen in the titanium silk silk screen precast body according to interior surface of cylinder liner in the process, be generally 1～3 layer of titanium silk silk screen;
Step 4, melting cylinder jacket matrix material: according to the requirement of cylinder jacket matrix material material, confirm the chemical composition of alumina-base material, and carry out melting, obtain the cylinder jacket matrix material of fusion;
Step 6, the Al of the synthesizing aluminum-based composite cylinder jacket of Laser Cladding in-situ
3Ti particle enhancement layer: when lasing beam diameter is 2mm～3mm, cladding, adopt argon shield, sweep speed 3mms
-1～4mms
-1Condition under utilize laser melting coating method will in be cast with titanium silk silk screen precast body the half-finished inner surface of cylinder jacket treat the enhancement region fusing, be cooled to room temperature then and obtain having the synthetic Al of original position
3The Ti intermetallic compound particle strengthens the aluminium base composite cylinder jacket semi-finished product of body enhancement region;
Step 7, heat treatment: will then at room temperature place minimum 8h through the finished cylinder jacket semi-finished product of step 6 at 500 ℃～550 ℃ condition held 10h～12h, then at 150 ℃～200 ℃ condition held 4h～8h, obtaining the inner surface enhancement region is Al
3The Ti intermetallic compound particle strengthens the aluminium base composite cylinder jacket semi-finished product of body;
Step 8, machining is handled with polishing: the cylinder jacket semi-finished product to getting through step 7 processing carry out machinery, polishing processing, obtain the synthetic Al of final original position
3The Ti particle surface strengthens aluminium base composite cylinder jacket.
According to the synthetic Al of above-mentioned original position
3The Ti particle surface strengthens the prepared cylinder jacket of preparation method of aluminium base composite cylinder jacket.This cylinder jacket light weight, and wearability, all more existing like product of non-oxidizability have largely and improve.
Below be the specific embodiment that the inventor provides, need to prove to the invention is not restricted to these embodiment:
Embodiment 1:
It is 150mm that the cylinder jacket of present embodiment preparation is of a size of external diameter, and internal diameter is 100mm, highly is 100mm, and the interior surface of cylinder liner enhancement layer is the thick Al of 2mm～3mm
3The aluminum matrix composite that the Ti intermetallic compound strengthens; The base aluminum sill is aluminium alloy ZL114A, its chemical composition: silicon: 6.5%～7.5%, copper Cu≤0.1% (impurity), magnesium: zinc 0.45%～0.60% :≤0.1% (impurity), manganese :≤0.1% (impurity), titanium: beryllium 0.10%～0.20%: zirconium 0.04%～0.07% :≤0.20% (impurity), tin :≤0.01% (impurity), lead :≤0.03% (impurity), all the other are aluminium.
The step of preparation process of present embodiment is following:
The first step; Processing titanium silk silk screen precast body: with diameter is that to be compiled into the mesh specification be 100 order titanium silk silk screens for the titanium silk of 150 μ m; Treat thickness, shape and the size of enhancement region then according to interior surface of cylinder liner; The titanium silk silk screen of 3 about 320mm of length of intercepting, width 100mm is processed the cylindric titanium silk silk screen precast body that diameter is Φ 100 * 100mm with its overlapping rolling;
Second step, the cast iron mould of processing die casting cylinder jacket: according to the size and dimension of cylinder jacket, the cast iron mould of processing die casting cylinder jacket;
The 3rd step; Arrange graphite paper and titanium silk silk screen precast body: the titanium silk silk screen precast body that obtains in graphite paper and the step 1 is arranged in respectively in the cast iron mould of die casting cylinder jacket; Graphite paper is between mold wall and titanium silk silk screen, and titanium silk silk screen precast body present position is that interior surface of cylinder liner is treated the position of enhancement region in the cast iron mould of die casting cylinder jacket;
The 4th step, melting cylinder jacket matrix material: the cylinder jacket matrix material is carried out melting, obtain the cylinder jacket matrix material of fusion;
The 5th step; Die casting cylinder jacket semi-finished product: in pouring temperature: 800 ℃, mold temperature: under 200 ℃, the condition of low pressure firing rate degree: 0.3m/s, high injection speed 2.6m/s, low pressure 50Mpa, high-pressure 100Mpa; The cylinder jacket matrix material die casting of fusion in the interior cast iron mould that is furnished with titanium silk silk screen silk screen die casting cylinder jacket, is cooled to then that room temperature obtains treating to be cast with in the enhancement region titanium silk silk screen precast body, non-enhancement region is the composite aluminum base cylinder jacket semi-finished product of high-strength aluminium sill;
In the 6th step, original position is synthesized Al
3Ti particle enhancement layer: when lasing beam diameter is 3mm, laser melting coating, adopt argon shield, sweep speed 3 (mms
-1) condition under utilize laser melting coating method will in be cast with titanium silk silk screen precast body interior surface of cylinder liner treat the enhancement region fusing, be cooled to room temperature then and obtain having the synthetic Al of original position
3The Ti intermetallic compound particle strengthens the aluminum based cylinder cover of body enhancement region;
In the 7th step, heat treatment: will then at room temperature place minimum 8h through the finished cylinder jacket semi-finished product of step 6 at 535 ± 5 ℃ of condition held 12h, then at 160 ± 5 ℃ of condition held 8h, obtaining the inner surface enhancement region is Al
3The Ti intermetallic compound strengthens the aluminum based cylinder cover of body;
The 8th step, finished product processing: will carry out machinery, polishing processing through heat treated cylinder jacket semi-finished product.
According to technical scheme of the present invention, the Al of the cylinder jacket that instance 1 makes
3The particle reinforced aluminium-based composite cylinder jacket of Ti with durionise commonly used be mg with phosphorus vanadium casting in bronze iron cylinder jacket in the unit that carries out wearing and tearing comparison (the seeing table 1) wear extent under the identical friction condition on the bench test machine
Table 1
| Wearing-in period | Phosphorus vanadium casting in bronze iron cylinder jacket | ?Al 3The cylinder jacket of Ti reinforced aluminum matrix composites preparation |
| 5h | 7.52 | ?4.15 |
| 10h | 19.21 | ?6.72 |
| 15h | 23.43 | ?10.17 |
| 20h | 30.24 | ?12.01 |
Embodiment 2:
The present embodiment preparation size is external diameter: 100mm, internal diameter: 70mm, and highly: the aluminium base composite cylinder jacket of 150mm, its inner surface enhancement layer are the thick Al of 1～2mm
3The aluminum matrix composite that the Ti intermetallic compound strengthens, the base aluminum sill is aluminium alloy ZL110, its chemical composition: silicon: 4.0%-6.0%; Copper: 5.0%-8.0%; Magnesium+zinc: 0.2%-0.5%; All the other are aluminium.
The step of preparation process of present embodiment is following:
The first step; Processing titanium silk silk screen precast body: with diameter is that to be compiled into the mesh specification be 60 order titanium silk silk screens for the titanium silk of 50 μ m; Treat thickness, shape and the size of enhancement region then according to interior surface of cylinder liner; The titanium silk silk screen of 2 about 220mm of length of intercepting, width 150mm, it is overlapping and roll into the columned titanium silk silk screen precast body that diameter is Φ 70 * 150mm;
Second step, the cast iron mould of processing die casting cylinder jacket: according to the size and dimension of cylinder jacket, the cast iron mould of processing die casting cylinder jacket;
The 3rd step; Arrange graphite paper and titanium silk silk screen precast body: the titanium silk silk screen precast body that obtains in graphite paper and the step 1 is arranged in respectively in the cast iron mould of die casting cylinder jacket; Graphite paper is between mold wall and titanium silk silk screen, and titanium silk silk screen precast body present position is that interior surface of cylinder liner is treated the position of enhancement region in the cast iron mould of die casting cylinder jacket;
The 4th step, melting cylinder jacket matrix material: according to the requirement of cylinder jacket matrix material material, confirm the chemical composition of alumina-base material melt, and carry out melting;
The 5th step; Die casting cylinder jacket semi-finished product: in pouring temperature: 800 ℃, mold temperature: under 150 ℃, the condition of low pressure firing rate degree: 0.2m/s, high injection speed 2.2m/s, low pressure 50Mpa, high-pressure 80Mpa; The die casting of alumina-base material melt in the interior cast iron mould that is furnished with titanium silk silk screen silk screen die casting cylinder jacket, is cooled to then that room temperature obtains treating being cast with in the enhancement region titanium silk silk screen precast body 1, non-enhancement region 5 is the cylinder jacket of high-strength aluminium sill;
In the 6th step, original position is synthesized Al
3Ti particle enhancement layer: when lasing beam diameter is 3mm, cladding, adopt argon shield, sweep speed 3 (mms
-1) condition under utilize laser melting coating method will in be cast with titanium silk silk screen precast body interior surface of cylinder liner treat the enhancement region fusing, be cooled to room temperature then and obtain having the synthetic Al of original position
3The Ti intermetallic compound particle strengthens the aluminum based cylinder cover of body enhancement region 6;
The 7th step, heat treatment: will be through the finished cylinder jacket semi-finished product of step 6 at 535 ± 5 ℃ of condition held 10h, then at room temperature place minimum 8h, then at 160 ± 5 ℃ of condition held 6h, obtaining the inner surface enhancement region is Al
3The Ti intermetallic compound strengthens the aluminum based cylinder cover of body;
The 8th step, finished product processing: will carry out machinery, polishing processing through heat treated cylinder jacket semi-finished product.
The microscopic structure of the titanium silk silk screen reinforced aluminum matrix composites of as cast condition is shown in Fig. 4 a, Fig. 4 b, Fig. 4 c after the die casting among this embodiment; Wherein Fig. 4 b, Fig. 4 c are all corresponding with Fig. 4 a; White place among the key diagram 4a is a titanium silk silk screen; Gray scale is a base aluminum partly, explains that casting die can access the composite sample that titanium silk silk screen strengthens.
Embodiment 3:
The cylinder jacket of present embodiment preparation is of a size of external diameter: 200mm, internal diameter: 100mm, highly: 50mm, the inner surface enhancement layer of cylinder jacket are the thick Al of 1～2mm
3The aluminum matrix composite that the Ti intermetallic compound strengthens; The base aluminum sill is aluminium alloy ZL116, its chemical composition: silicon: copper 6.5%～8.5% :≤0.3% (impurity), magnesium: zinc 0.35%～0.55% :≤0.3% (impurity), manganese :≤0.1% (impurity), titanium: beryllium 0.10%～0.30%: 0.15%～0.40%, all the other are aluminium.
The step of preparation process of present embodiment is following:
The first step; Processing titanium silk silk screen precast body: with diameter is that to be compiled into the mesh specification be 100 order titanium silk silk screens for the titanium silk of 100 μ m; Treat thickness, shape and the size of enhancement region then according to interior surface of cylinder liner; The titanium silk silk screen of 2 about 320mm of length of intercepting, width 50mm, it is overlapping and roll into the columned titanium silk silk screen precast body that diameter is Φ 100 * 50mm;
Second step, the cast iron mould of processing die casting cylinder jacket: according to the size and dimension of cylinder jacket, the cast iron mould of processing die casting cylinder jacket;
The 3rd step; Arrange graphite paper and titanium silk silk screen precast body: the titanium silk silk screen precast body that obtains in graphite paper and the step 1 is arranged in respectively in the cast iron mould of die casting cylinder jacket; Graphite paper is between mold wall and titanium silk silk screen, and titanium silk silk screen precast body present position is that interior surface of cylinder liner is treated the position of enhancement region in the cast iron mould of die casting cylinder jacket;
The 4th step, melting cylinder jacket matrix material: according to the requirement of cylinder jacket matrix material material, confirm the chemical composition of aluminium alloy melt, and carry out melting;
The 5th step; Die casting cylinder jacket semi-finished product: in pouring temperature: 750 ℃, mold temperature: under 150 ℃, the condition of low pressure firing rate degree: 0.3m/s, high injection speed 2.6m/s, low pressure 40Mpa, high-pressure 80Mpa; The die casting of alumina-base material melt is furnished with in the titanium silk silk screen silk screen die casting cast iron mould to interior, is cooled to then that room temperature obtains treating to be cast with in the enhancement region titanium silk silk screen precast body, non-enhancement region is the cylinder jacket of high-strength aluminium sill;
In the 6th step, original position is synthesized Al
3Ti particle enhancement layer: when lasing beam diameter is 3mm, cladding, adopt argon shield, sweep speed 4 (mms
-1) condition under utilize laser melting coating method will in be cast with titanium silk silk screen precast body interior surface of cylinder liner treat the enhancement region fusing, be cooled to room temperature then and obtain having the synthetic Al of original position
3The Ti intermetallic compound particle strengthens the aluminum based cylinder cover of body enhancement region;
The 7th step, heat treatment: will be through the finished cylinder jacket semi-finished product of step 6 at 535 ± 5 ℃ of condition held 10h, then at room temperature place minimum 8h, then at 160 ± 5 ℃ of condition held 4h, obtaining the inner surface enhancement region is Al
3The Ti intermetallic compound strengthens the aluminum based cylinder cover of body;
In the 8th step, machining is handled with polishing: will carry out machinery, polishing processing through heat treated cylinder jacket semi-finished product.
The microscopic structure of the composite cylinder jacket enhancement region behind the laser melting coating among this embodiment is as shown in Figure 6, and wherein, Fig. 6 a is the microscopic structure of low multiple; Fig. 6 b is for strengthening the multiplication factor microscopic structure of body region, and Fig. 6 a shows the Al that original position is synthetic
3The Ti particle dispersion is distributed in cylinder-barrel surface, and the particle that Fig. 6 b surface forms mainly is rendered as block and two kinds of strips, is typical A l
3The Ti intermetallic compound particle.
Above-mentioned three specific embodiment gained cylinder jacket are carried out after correlation test detects, obtain its tensile strength＞335MPa of non-enhancement region of composite cylinder jacket, yield strength＞240Mpa, HBS＞60.With respect to the cylinder jacket of pure matrix material preparation, the hardness HBS of enhancement region＞80, wearability improves 1.5-2 doubly, and the antioxygenic property in 400-500 ℃ of scope improves about 1 times.
Claims (2)
1. an original position is synthesized Al
3The Ti particle surface strengthens the preparation method of aluminium base composite cylinder jacket, it is characterized in that, this method realizes through the following step:
Step 1, processing titanium silk silk screen precast body:
Be that to be compiled into the mesh specification be 20 orders ~ 100 purpose titanium silk silk screens for the titanium silk of 50 μ m ~ 150 μ m earlier with diameter; Treat thickness, the shape and size of enhancement region then according to interior surface of cylinder liner; Select the titanium silk silk screen of the suitable number of plies; And with its carry out cutting, roll or with its cutting, stack, roll into titanium silk silk screen precast body cylindraceous, titanium silk silk screen precast body is wherein processed by 1 ~ 3 layer of titanium silk silk screen;
Step 2, the cast iron mould of processing die casting cylinder jacket:
According to the shape and the size of cylinder jacket, the cast iron mould of processing die casting cylinder jacket;
Step 3, arrange graphite paper and titanium silk silk screen precast body:
Earlier graphite paper is arranged in the cast iron mould of die casting cylinder jacket; Then the titanium silk silk screen precast body that obtains in the step 1 is arranged on the graphite paper; Titanium silk silk screen precast body present position in the cast iron mould of die casting cylinder jacket is that interior surface of cylinder liner is treated the position of enhancement region in the cast iron mould of die casting cylinder jacket, obtains being furnished with the cast iron mould of the die casting cylinder jacket of titanium silk silk screen precast body;
Step 4, melting cylinder jacket matrix material:
According to the requirement of cylinder jacket matrix material material, confirm the chemical composition of alumina-base material, and carry out melting, obtain the cylinder jacket matrix material of fusion;
Step 5, die casting cylinder jacket semi-finished product:
In pouring temperature is that 750 ℃ ~ 800 ℃, mold temperature are that 150 ℃ ~ 200 ℃, low pressure firing rate degree are that 0.2 m/s ~ 0.3m/s, high injection speed 2.0 m/s ~ 2.6m/s, low pressure are under the condition of 40 Mpa ~ 50Mpa, high-pressure 80Mpa ~ 100Mpa; With the cylinder jacket matrix material die casting of fusion in the cast iron mould of the interior die casting cylinder jacket that is furnished with titanium silk silk screen precast body; Be cooled to room temperature then, obtain the cylinder jacket semi-finished product;
Step 6, the Al of the synthesizing aluminum-based composite cylinder jacket of Laser Cladding in-situ
3Ti particle enhancement layer:
, lasing beam diameter adopts argon shield, sweep speed 3 mms when being 2 mm ~ 3 mm, cladding
-1~ 4mms
-1Condition under utilize laser that cylinder jacket semi-finished product inner surface is treated that the enhancement region melts, then these cylinder jacket semi-finished product are naturally cooled to room temperature, obtain Al
3The aluminium base composite cylinder jacket semi-finished product that the Ti particle strengthens;
Step 7, heat treatment:
The cylinder jacket semi-finished product that will process through step 6 are at 500 ℃ ~ 550 ℃ condition held 10h～12h, then at room temperature place minimum 8h, then at 150 ℃ ~ 200 ℃ condition held 4 h～8h;
Step 8, machining is handled with polishing:
Cylinder jacket semi-finished product to getting through step 7 processing carry out machinery, polishing processing, obtain the synthetic Al of final original position
3The Ti particle surface strengthens aluminium base composite cylinder jacket.
2. an original position according to claim 1 is synthesized Al
3The Ti particle surface strengthens the prepared cylinder jacket of preparation method of aluminium base composite cylinder jacket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN102373467B (en) * | 2011-10-26 | 2014-04-02 | 昆明理工大学 | Preparation method of laser cladding coating of tridimensional space stacking net additive |
| CN103352978B (en) * | 2013-06-06 | 2015-11-04 | 西安科技大学 | Al 3ti/Al 3ni particle is collaborative strengthens sial base composite piston and preparation method |
| US9796044B2 (en) | 2014-08-25 | 2017-10-24 | GM Global Technology Operations LLC | Manufacturing process for hard facing aluminum injection molds |
| CN104388924A (en) * | 2014-10-11 | 2015-03-04 | 江苏大学 | Method for preparing Al-based in-situ composite material by laser accumulation |
| CN110144474A (en) * | 2019-05-15 | 2019-08-20 | 中北大学 | Situ Al3Ti/Al composite material integral forming method |
| CN113215567B (en) * | 2021-05-08 | 2023-01-24 | 成都航空职业技术学院 | Method for improving binding force of Ti-Al coating on surface of TA15 titanium alloy and coating prepared by method |
| CN115247238B (en) * | 2021-12-10 | 2023-10-13 | 榆林学院 | Al-Ti intermetallic compound porous material based on synergistic pore-forming mechanism and preparation method thereof |
| CN115821188B (en) * | 2022-12-21 | 2023-12-29 | 重庆宗申发动机制造有限公司 | Titanium alloy with coating and preparation method thereof |
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| CN1396291A (en) * | 2002-01-27 | 2003-02-12 | 吉林大学 | Process for preparing steel-base composite feinforced by particles generated in-situ locally |
| CN101029377A (en) * | 2007-02-14 | 2007-09-05 | 西安建筑科技大学 | Production of titanium nitride wire mesh metal-based composite material |
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| CN101422813A (en) * | 2009-01-12 | 2009-05-06 | 西安建筑科技大学 | Preparation method of gray iron base in-situ composite material |
| CN101537483A (en) * | 2009-04-28 | 2009-09-23 | 西安建筑科技大学 | Preparation method of reinforced composite wear-resistant lining board of precast framework |
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| CN1396291A (en) * | 2002-01-27 | 2003-02-12 | 吉林大学 | Process for preparing steel-base composite feinforced by particles generated in-situ locally |
| CN101029377A (en) * | 2007-02-14 | 2007-09-05 | 西安建筑科技大学 | Production of titanium nitride wire mesh metal-based composite material |
| CN101406943A (en) * | 2008-11-18 | 2009-04-15 | 西安建筑科技大学 | Method for preparing nodular cast iron-base composite material for in situ production of chromium carbide |
| CN101422813A (en) * | 2009-01-12 | 2009-05-06 | 西安建筑科技大学 | Preparation method of gray iron base in-situ composite material |
| CN101537483A (en) * | 2009-04-28 | 2009-09-23 | 西安建筑科技大学 | Preparation method of reinforced composite wear-resistant lining board of precast framework |
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