CN107755699A - A kind of preparation method of steel pistons - Google Patents
A kind of preparation method of steel pistons Download PDFInfo
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- CN107755699A CN107755699A CN201711070580.1A CN201711070580A CN107755699A CN 107755699 A CN107755699 A CN 107755699A CN 201711070580 A CN201711070580 A CN 201711070580A CN 107755699 A CN107755699 A CN 107755699A
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- steel pistons
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- piston blank
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/60—Treatment of workpieces or articles after build-up
- B22F10/64—Treatment of workpieces or articles after build-up by thermal means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/20—Direct sintering or melting
- B22F10/22—Direct deposition of molten metal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/80—Data acquisition or data processing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
- B22F7/08—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools with one or more parts not made from powder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y10/00—Processes of additive manufacturing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y70/00—Materials specially adapted for additive manufacturing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y80/00—Products made by additive manufacturing
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/30—Process control
- B22F10/34—Process control of powder characteristics, e.g. density, oxidation or flowability
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/30—Process control
- B22F10/36—Process control of energy beam parameters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/30—Process control
- B22F10/36—Process control of energy beam parameters
- B22F10/366—Scanning parameters, e.g. hatch distance or scanning strategy
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
- B22F2003/248—Thermal after-treatment
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention discloses a kind of preparation method of steel pistons, its steel pistons includes 3D printing part and piston blank part, and the interior oil cooling passage of steel pistons is independently formed by 3D printing part or is collectively forming by 3D printing part and piston blank part；Its preparation method comprises the following steps：Piston blank part is made, and support platform is formed on piston blank part；Area of computer aided completes the structure design model of 3D printing part；3D printing part is printed in the support platform of piston blank part using 3D printing equipment.The present invention is combined using 3D printing technique with steel pistons blank technology, it is molded oil cooling passage structure 3D printing in steel pistons, the preparation method technique is simple, stock utilization is high, effect is good, cost is low, prepare that the shapes and sizes of steel pistons are unrestricted, meet the requirement of steel pistons structure integration.The preparation method that 3D printing is integrally used the invention also discloses a kind of steel pistons.
Description
Technical field
The present invention relates to parts machining manufacturing technology field, more particularly to a kind of preparation method of steel pistons.
Background technology
Engine is the power resources of automobile, rolling stock and ship, and piston is various engines " heart " part,
Piston subjects high temperature, high pressure, complicated friction and the effect of heat engine coupled load, working environment and extremely disliked in the course of the work
It is bad.The fast development of internal-combustion engine technology in the late two decades, HP, hp/litre and explosion pressure are constantly lifted, as shown in figure 1, companion
The live load more and more higher born with piston, higher requirement, especially high-temperature behavior are proposed to the performance of piston.Lance
Shield is that aluminum piston drastically declines in hot operation region tensile strength properties, as shown in Fig. 2 conventional aluminum piston material is held at present
By high heat load ability close to the limit, meanwhile, aluminum piston be difficult to meet V and the standard of state VI engine calls.Thus,
It is inexorable trend to develop the steel pistons for meeting to require.
Therefore, domestic outer piston manufacturer devises a variety of steel pistons, such as overall forging steel piston, steel top and aluminum skirt structurally live
Plug, monoblock type cast-iron piston etc., all there is certain shortcoming, such as complex process, interior oil cooling passage difficult forming in above structure.It is interior
The shaping of oil cooling passage structure is to restrict the main reason for manufacturing steel pistons, at present both at home and abroad mostly using welding, friction welding (FW)
Certain shortcoming all be present with machine-shaping mode, these modes such as laser remoltens, processing difficulties, yielding, processing such as all be present
Surplus is big, the process-cycle is long, crudy and precision are difficult the factors such as control, it is difficult to meets oil duct in piston structure integration
It is required that.Therefore, it is necessary to seek a kind of method of new preparation containing interior oil cooling passage steel pistons.
The content of the invention
In order to solve the above-mentioned technical problem of prior art, the invention provides a kind of preparation method of new steel pistons,
This method technique is simple, stock utilization is high, effect is good, cost is low, production efficiency is high, prepares the shapes and sizes of steel pistons not
It is restricted, meets the requirement of steel pistons structure integration.
To achieve these goals, the invention provides following technical scheme：
A kind of preparation method of steel pistons, the steel pistons include 3D printing part and piston blank part, the steel pistons
Interior oil cooling passage independently formed by the 3D printing part or by the 3D printing part and the common shape of piston blank part
Into；The preparation method of the steel pistons comprises the following steps：
The piston blank part is made, and support platform is formed on the piston blank part；
Area of computer aided completes the structure design model of the 3D printing part；
The 3D printing part is printed in the support platform of the piston blank part using 3D printing equipment.
Preferably, in the preparation method of above-mentioned steel pistons, the piston blank part is made by casting or forging technology
Form.
Preferably, in the preparation method of above-mentioned steel pistons, the structure that area of computer aided completes the 3D printing part is set
Meter model comprises the following steps：
The threedimensional model of the 3D printing part is made using Three-dimensional Design Software；
The threedimensional model is placed on substrate processing and optimizes and supports；
The digital document of the threedimensional model is sent to the 3D printing equipment.
Preferably, in the preparation method of above-mentioned steel pistons, branch of the 3D printing equipment on the piston blank part is utilized
Also include step before printing the 3D printing part on support platform：Pre-alloying powder.
Preferably, in the preparation method of above-mentioned steel pistons, the metal dust that is used in pre-alloying powder step for
42CrMo4 steel, 34CrNiMo6 steel or spheroidal graphite cast-iron.
Preferably, in the preparation method of above-mentioned steel pistons, the average grain of the powder particle in pre-alloying powder step
Spend radius and be less than 50 μm, the powder particle carries out ball milling in the presence of lubricant after atomization and crosses sieve classification.
Preferably, in the preparation method of above-mentioned steel pistons, branch of the 3D printing equipment on the piston blank part is utilized
Print the 3D printing part on support platform also includes step afterwards：
The steel pistons are first incubated 8 hours at a temperature of higher than 900 DEG C, then carry out Quenching Treatment, most by heat treatment
Afterwards to steel pistons heating or temper.
Preferably, in the preparation method of above-mentioned steel pistons, the material of the 3D printing part and the piston blank part
It is identical.
In the preparation method of steel pistons provided by the invention, steel pistons include 3D printing part and piston blank part, and steel is lived
The interior oil cooling passage of plug is independently formed by 3D printing part or is collectively forming by 3D printing part and piston blank part；Its making side
Method comprises the following steps：Piston blank part is made, and support platform is formed on piston blank part；Area of computer aided is completed 3D and beaten
Print the structure design model of part；3D printing part is printed in the support platform of piston blank part using 3D printing equipment.
The present invention is combined using 3D printing technique with steel pistons blank technology, is molded oil cooling passage structure 3D printing in steel pistons, should
Preparation method technique is simple, stock utilization is high, effect is good, cost is low, and it is unrestricted to prepare the shapes and sizes of steel pistons, full
The requirement of sufficient steel pistons structure integration.Instant invention overcomes oil cooling passage difficult forming, closed in traditional handicraft manufacture steel pistons
The problem of defect is more.
Present invention also offers the preparation method of another steel pistons, comprise the following steps：Area of computer aided is completed steel and lived
The overall construction design model of plug；Pre-alloying powder；Steel pistons are printed using 3D printing equipment, and are formed closed interior cold
Oil duct.In the preparation method, steel pistons are integrally made using 3D printing, the derivation of its caused beneficial effect with it is upper
It is similar to state the derivation for the beneficial effect that the preparation methods of steel pistons is brought, therefore repeats no more herein.
Preferably, in the preparation method of above-mentioned steel pistons, the steel pistons are printed using 3D printing equipment, and formed
Also include step after closed interior oil cooling passage：
The steel pistons are first incubated 8 hours at a temperature of higher than 900 DEG C, then carry out Quenching Treatment, most by heat treatment
Afterwards to steel pistons heating or temper.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the steel pistons overall structure diagram in the embodiment of the present invention one；
Fig. 2 is the longitudinal sectional drawing of the 3D printing part in the embodiment of the present invention one；
Fig. 3 is the top view of the 3D printing part in the embodiment of the present invention one；
Fig. 4 is the steel pistons overall structure diagram in the embodiment of the present invention two；
Fig. 5 is the longitudinal sectional drawing of the 3D printing part in the embodiment of the present invention two；
Fig. 6 is the top view of the 3D printing part in the embodiment of the present invention two；
Fig. 7 is the steel pistons overall structure diagram in the embodiment of the present invention three；
Fig. 8 is the longitudinal sectional drawing of the 3D printing part in the embodiment of the present invention three；
Fig. 9 is the top view of the 3D printing part in the embodiment of the present invention three；
Figure 10 is the steel pistons overall structure diagram in the embodiment of the present invention four.
Fig. 1 is into Figure 10：
1-3D print members, 2- piston blanks part, oil cooling passage, 11- smooth curves, 21- support platforms, 12- first in 3-
Annular groove, the annular grooves of 13- second, the annular grooves of 14- the 3rd.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
Fig. 1 to Figure 10 is refer to, the invention provides a kind of preparation method of steel pistons, the steel pistons made by the present invention
Including 3D printing part 1 and piston blank part 2, the interior oil cooling passage 3 of steel pistons is independently formed by 3D printing part 1 or beaten by 3D
Print part 1 and piston blank part 2 are collectively forming；Specifically, the preparation method of the steel pistons comprises the following steps：
Piston blank part 2 is made, and support platform 21 is formed on piston blank part 2；
Area of computer aided completes the structure design model of 3D printing part 1；
Using 3D printing equipment 3D printing part 1 is printed in the support platform 21 of piston blank part 2.
The present invention is combined using 3D printing technique with steel pistons blank technology, beats the structure 3D of oil cooling passage 3 in steel pistons
Type is printed as, the preparation method technique is simple, stock utilization is high, effect is good, cost is low, prepares the shapes and sizes of steel pistons not
It is restricted, meets the requirement of steel pistons structure integration.Instant invention overcomes oil cooling passage shaping in traditional handicraft manufacture steel pistons
The problem of difficult, closed defect is more.
It should be noted that in the preparation method of above-mentioned steel pistons, piston blank part 2 passes through casting or forging technology etc.
Conventional molding process is made, and so can further reduce cost, and moulding process is simply ripe, makes piston blank part 2
Quality be more readily available guarantee.
Preferably, in the preparation method of above-mentioned steel pistons, area of computer aided completes the structure design mould of 3D printing part 1
Type comprises the following steps：
The threedimensional model of 3D printing part 1 is made using Three-dimensional Design Software；
Threedimensional model is placed on substrate processing and optimizes and supports；
The digital document of threedimensional model is sent to 3D printing equipment.
Preferably, in the preparation method of above-mentioned steel pistons, put down using support of the 3D printing equipment on piston blank part 2
Also include step before 3D printing part 1 is printed on platform 21：Pre-alloying powder.Specifically, in pre-alloying powder step
The metal dust used is raw material for 42CrMo4 steel, 34CrNiMo6 steel or spheroidal graphite cast-iron etc..The shape of powder particle can be
The spherical shape of rule, particle mean size radius r are less than 50 μm, density 7.9g/cm3, there are excellent mechanical performances.Powder particle passes through
Ball milling is carried out in the presence of lubricant (such as stearic acid) and cross sieve classification after atomization.
Preferably, in the preparation method of above-mentioned steel pistons, put down using support of the 3D printing equipment on piston blank part 2
3D printing part 1 is printed on platform 21 also includes step afterwards：
Steel pistons are first incubated 8 hours at a temperature of higher than 900 DEG C, then carry out Quenching Treatment by heat treatment, finally right
Steel pistons heat or temper.Quenching structure will appear as high intensity and high rigidity under macroscopic view, but also have simultaneously high crisp
Property, the sclerotic tissue of this typical needle-like is referred to as martensite, and the steel pistons after quenching are by heating or temper, stress
It is eliminated and forms tempered structure, hardness and intensity somewhat reduces, and improve toughness.
Preferably, in the preparation method of above-mentioned steel pistons, 3D printing part is identical with the material of piston blank part, such as adopts
With steel or cast iron etc., it can so ensure the integral material and consistency of performance of steel pistons.
The detailed process of the present invention is exemplified below：
Piston blank part 2 is made by the technique such as casting or forging, and support platform 21 is formed on piston blank part 2.
Area of computer aided completes the structure design model of 3D printing part 1, is set with the three-dimensional such as ProE softwares or CATIA softwares
The threedimensional model of software development 3D printing part 1 is counted, then threedimensional model is placed on substrate processing and optimizes and supports, this
The substrate processing at place refers to the support platform model that piston blank part 2 is formed, then the digital document by the threedimensional model made
Send to 3D printing equipment, carry out the making of sample.
Pre-alloying powder, metal powder particles are shaped as the spherical shape of rule, 50 μm of particle mean size radius r ＜, density
For 7.9g/cm3, there is good mechanical property.Metal dust use 42rMo4 steel, 34CrNiMo6 steel or spheroidal graphite cast-iron etc. for
Raw material.Powder particle ball milling, excessively sieve classification in the presence of lubricant (such as stearic acid) after atomization.
3D printing is molded, and 3D printing part is printed in the support platform 21 of piston blank part 2 using 3D printing equipment
1.The 3D printing system mainly includes powder feed system, shower nozzle, workbench, motion and heating work room.Wherein, powder feeding system
Unite and stable feedstock transportation is provided for nozzle, it is desirable to which raw material powder footpath is stable, and generally 1.25mm ± 0.05mm, powder is in the showerhead
Melting is heated, the nozzle of head of the nozzle provides certain pressure for the extrusion of material, then control lower edge of the shower nozzle in system
Print the filling track extruded material of part, successively accumulation molding；On the one hand workbench provides heating platform, keep forming part
Certain adhesion with bottom, on the one hand under set programming, after part is often molded one layer, by specified altitude assignment along Z axis
Successively move；Motion controls shower nozzle and workbench to press pre-determined route along X, Y, Z tri- mainly under computer program control
The motion of individual axle；Heating work room is primarily referred to as to provide the part of isoperibol during forming parts.
The main machined parameters of laser：Debug peak power output 200W gears, real output 195W, spot diameter
For 100 μm, sweep speed 500mm/s, overlapping rate is 20 μm, powder diameter≤45 μm, in normal distribution, 20 μm of thickness.
Heat treatment, 3D steel pistons product are incubated 8 hours at a temperature of higher than 900 DEG C, then carry out Quenching Treatment, finally
To steel pistons heating or temper, toughness is improved.
Carry out the process details of the specific steel pistons for introducing four kinds of different structures with reference to 4 embodiments.
Embodiment one
It refer to Fig. 1 to Fig. 3, the piston blank part 2 in embodiment one includes the interior oil cooling passage 3 without closure, also sets up
There is the circumferentially distributed support platform 21 positioned at interior oil cooling passage outer ring, the support along axis can be provided for 3D printing part,
3D printing part 1 is cyclic structure, in order to reduce 3D printing part 1 and the stress concentration of the lap-joint of piston blank part 2, we
Case is designed with smooth curve 11 in the inner ring of 3D printing part 1 and the lap-joint of piston blank part 2, as depicted in figs. 1 and 2.3D
After printing terminates, 3D printing part 1 and piston blank part 2 surround and form a complete closed interior oil cooling passage 3 jointly.
Embodiment two
It refer to Fig. 4 to Fig. 6, the steel pistons structure in embodiment two and the steel pistons structure design class in embodiment one
Seemingly, and 3D printing part 1 is also configured as loop configuration, and difference is, the outer ring of the 3D printing part 1 in embodiment two is provided with
For installing the first annular groove 12 of oil ring or compression ring, as shown in Figure 4 and Figure 5.
Embodiment three
It refer to Fig. 7 to Fig. 9, the 3D printing part 1 in embodiment three independently forms interior oil cooling passage 3, i.e. interior oil cooling passage 3
Inside 3D printing part 1, piston blank part 2 is only the skirt section of piston, and the upper surface in skirt section is formed for supporting 3D printing
The support platform 21 of part 1.In addition, the periphery of 3D printing part 1 is provided with the first annular groove 12 for being used to installing oil ring and compression ring, the
Two annular grooves 13 and the 3rd annular groove 14.
Example IV
The preparation method that another steel pistons provided by the invention are employed in example IV, comprises the following steps：
Area of computer aided completes the overall construction design model of steel pistons；
Pre-alloying powder；
Steel pistons are printed using 3D printing equipment, and form closed interior oil cooling passage 3.
Preferably, in the preparation method of above-mentioned steel pistons, steel pistons are printed using 3D printing equipment, and formed closed
Interior oil cooling passage 3 after also include step：
Steel pistons are first incubated 8 hours at a temperature of higher than 900 DEG C, then carry out Quenching Treatment by heat treatment, finally right
Steel pistons heat or temper.
Figure 10 is refer to, in the preparation method, steel pistons are integrally made using 3D printing, and independently form interior cold oil
Road 3, in addition, piston outer ring is additionally provided with the first annular groove 12, the second annular groove 13 and the 3rd annular groove 14.
The foregoing description of the disclosed embodiments, professional and technical personnel in the field are enable to realize or using the present invention.
A variety of modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope caused.
Claims (10)
1. a kind of preparation method of steel pistons, it is characterised in that the steel pistons include 3D printing part (1) and piston blank part
(2), the interior oil cooling passage (3) of the steel pistons is independently formed by the 3D printing part (1) or by the 3D printing part (1)
It is collectively forming with the piston blank part (2)；The preparation method of the steel pistons comprises the following steps：
The piston blank part (2) is made, and support platform (21) is formed on the piston blank part (2)；
Area of computer aided completes the structure design model of the 3D printing part (1)；
Using 3D printing equipment the 3D printing part is printed in the support platform (21) of the piston blank part (2)
(1)。
2. the preparation method of steel pistons according to claim 1, it is characterised in that the piston blank part (2) passes through casting
Make or forging technology is made.
3. the preparation method of steel pistons according to claim 1, it is characterised in that area of computer aided completes the 3D printing
The structure design model of part (1) comprises the following steps：
The threedimensional model of the 3D printing part (1) is made using Three-dimensional Design Software；
The threedimensional model is placed on substrate processing and optimizes and supports；
The digital document of the threedimensional model is sent to the 3D printing equipment.
4. the preparation method of steel pistons according to claim 1, it is characterised in that using 3D printing equipment in the piston
Also include step before the 3D printing part (1) is printed in the support platform (21) on blank (2)：It is pre-alloyed
Powder.
5. the preparation method of steel pistons according to claim 4, it is characterised in that used in pre-alloying powder step
Metal dust is 42CrMo4 steel, 34CrNiMo6 steel or spheroidal graphite cast-iron.
6. the preparation method of steel pistons according to claim 4, it is characterised in that the powder in pre-alloying powder step
The particle mean size radius of particle is less than 50 μm, and the powder particle carries out ball milling in the presence of lubricant after atomization and crosses screening
Level.
7. the preparation method of steel pistons according to claim 4, it is characterised in that using 3D printing equipment in the piston
The 3D printing part (1) is printed in the support platform (21) on blank (2) also includes step afterwards：
The steel pistons are first incubated 8 hours at a temperature of higher than 900 DEG C, then carry out Quenching Treatment by heat treatment, finally right
The steel pistons heating or temper.
8. the preparation method of steel pistons according to claim 1, it is characterised in that the 3D printing part (1) and described
The material of piston blank part (2) is identical.
9. a kind of preparation method of steel pistons, it is characterised in that comprise the following steps：
Area of computer aided completes the overall construction design model of the steel pistons；
Pre-alloying powder；
The steel pistons are printed using 3D printing equipment, and form closed interior oil cooling passage (3).
10. the preparation method of steel pistons according to claim 9, it is characterised in that print institute using 3D printing equipment
Steel pistons are stated, and form closed interior oil cooling passage (3) also to include step afterwards：
The steel pistons are first incubated 8 hours at a temperature of higher than 900 DEG C, then carry out Quenching Treatment by heat treatment, finally right
The steel pistons heating or temper.
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| CN111842908A (en) * | 2020-08-06 | 2020-10-30 | 西安康博新材料科技有限公司 | Internal combustion engine aluminum alloy piston of 3D printing titanium alloy combustion chamber and preparation method thereof |
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Application publication date: 20180306 |