CN107900309A - A kind of surface double-decker die casting and preparation method thereof - Google Patents
A kind of surface double-decker die casting and preparation method thereof Download PDFInfo
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- CN107900309A CN107900309A CN201711409123.0A CN201711409123A CN107900309A CN 107900309 A CN107900309 A CN 107900309A CN 201711409123 A CN201711409123 A CN 201711409123A CN 107900309 A CN107900309 A CN 107900309A
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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
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
- B22D17/2209—Selection of die materials
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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
- C21D10/00—Modifying the physical properties by methods other than heat treatment or deformation
-
- 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
- C21D7/00—Modifying the physical properties of iron or steel by deformation
- C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
- C21D7/04—Modifying the physical properties of iron or steel by deformation by cold working of the surface
- C21D7/06—Modifying the physical properties of iron or steel by deformation by cold working of the surface by shot-peening or the like
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C30/00—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F17/00—Multi-step processes for surface treatment of metallic material involving at least one process provided for in class C23 and at least one process covered by subclass C21D or C22F or class C25
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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
- Y02P10/20—Recycling
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Physical Vapour Deposition (AREA)
Abstract
The invention discloses a kind of surface double-decker die casting and preparation method thereof, belong to coat preparing technology field.Double-decker comprising mould base material homosphere and its areal deformation transition zone and surface resist blocking and that adhesion layer, the surface double-decker die casting are mainly completed by following steps：The pretreatment of mould base material homosphere, surface deformation processing, deposition anti-stick coat, cooling.The various ways such as laser-impact, bead can be selected in deformation process, and Laser chemical deposition, metal organic chemical vapor deposition or physical vapour deposition (PVD) can be selected in deposition resist blocking and that layer.Wear-resisting by the protection die casting of the surface double-decker, impact resistance enhancing, avoids the adhesion of stickum during production, remains, and reduces mold clean, the production cost of infringement, extends the service life of mould.
Description
Technical field
The invention belongs to coat preparing technology field, and in particular to a kind of surface double-decker die casting and its preparation side
Method.
Background technology
Die casting is that one kind is forced metallic solution in press-in metal die using high pressure, and solidification forms casting under stress
A kind of microcast process.Cast obtained metal has a low-density, high intensity, good moldability, it is corrosion-resistant the advantages that, use
Die-casting technique can also improve the utilization rate of material, at the same can with low cost, go out at high speed with high-precision die casting it is complex-shaped and
The good parts of surface quality.
Key equipment of the die casting as Die Casting, the quality of its performance will directly affect the matter of aluminum alloy die casting
Amount and cost.Hot die steel is current using wider die casting die material.Since die casting is easy in use
It is subject to burn into wash away, the damage such as adhesion, and due to be subjected to frequent cold cycling in Die Casting in die casting table
Face easily forms fatigue crack.Although hot work can to a certain extent be improved by the adjustment of a degree of alloying component at present
The performance of mould steel die casting, but its performance can not still meet to be actually needed.
The protective layer of double-decker is prepared on die casting surface can increase substantially the anti-sticky, wear-resisting, heat-resisting of mould
Performance, reduces the fatigue crack during mould cold cycling, mold clean, the production cost of infringement is reduced, so as to improve mould
The quality of tool and extension die life.But although currently can be notable by means such as Bononizing pretreatments on die casting surface
Improve its corrosion-resistant and wear-resisting property in the molten metal, but since boride layer itself brittleness is larger, structure it is not fine and close and
Infiltration layer is relatively thin, and coating failure easily occurs in use.
The content of the invention
In order to overcome above-mentioned defect existing in the prior art, it is an object of the invention to provide a kind of surface double-decker
Die casting and preparation method thereof, by die matrix prepare with protection die matrix double-decker, the structure by
The deformable transition layer that intensity, hardness, fatigue resistance improve and the resist blocking and that with high strength characteristics are adhered to, and can effectively improve pressure
Wearability, resistance to pressure, fatigue resistance and the resistance to blocking energy of casting mould.
The present invention is to be achieved through the following technical solutions：
The invention discloses a kind of surface double-decker die casting, including mould base material homosphere and from the bottom to top successively
The areal deformation transition zone and surface resist blocking and that adhesion layer being disposed there above；Wherein：
Areal deformation transition zone is to deform to change the table that the original microstructure of die matrix material is formed based on microstructure
Layer region, the thickness of areal deformation transition zone is 0.05~300 μm；
Surface resist blocking and that adhesion layer is the surface attachment layer that substrate material surface formation is deposited on based on material, and surface is anti-stick
The thickness for connecting adhesion layer is 0.05~3 times of areal deformation transition region thickness.
Preferably, the single deformation or single deformation that the plastic deformation ε of the areal deformation transition zone is 20%~300%
The multiple deformation that amplitude is 3%~200%, it organizes the entanglement network structure that dislocation is presented.
Preferably, the dislocation density of areal deformation transition zone is than 10~10000 times of mould base material homogeneous floor height, crystallite dimension
Or less than 1/5 that subgrain size is mould base material homosphere, and particle diameter is 20nm~800nm.
Preferably, the surface resist blocking and that adhesion layer is the coating for component by metallic element and nonmetalloid.
Preferably, resist blocking and that adhesion layer in surface is selected from aluminium oxide, zirconium oxide, TiAlN, TiAlCN, SiC, titanium carbide, oxidation
Chromium, TiNAlC, titanium nitride, titanium oxide or ZrB2。
The invention also discloses the preparation method of above-mentioned surface double-decker die casting, comprise the following steps：
1) the mould base material homogeneous layer surface crossed in cleaning treatment carries out deformation process, prepares thickness as 0.05~300 μm
Areal deformation transition zone；
Wherein, deformation process is to apply pressure in mould base material homogeneous layer surface to make it produce strong plastic deformation change table
Face microstructure；
2) one layer of resist blocking and that adhesion layer is deposited using vapour deposition process in obtained areal deformation transition layer surface, surface resists
The thickness of adhesion adhesion layer is 0.05~3 times of areal deformation transition region thickness；
3) surface double-decker die casting after cooling, is made.
Preferably, cleaning treatment is using the cleaning of solvent supersonic ripple or glow discharge cleaning mold base material homosphere.
Preferably, in step 1), deformation process uses laser-impact, laser-impact die surface 1~10 time, laser beam
Laser power density is 1 × 109W/cm2~9 × 109W/cm2, pulse width is 10~200ns, surge>1GPa.
Preferably, in step 1), deformation process is impacted using shot-peening, and bullet used in shot-peening is cast steel ball, cast iron pellets, glass
One or more in ball and ceramic pellet, the hardness of bullet are 40~70HRC, velocity of shot>70m/s, surface roughness 20
~145um, shot-peening granularity preferably 5~50 mesh.
Preferably, in step 2), vapour deposition process is using laser induced chemical vapor depostion method, metal organic chemical vapor deposition
Method or physical vaporous deposition.
Compared with prior art, the present invention has technique effect beneficial below：
Double-decker die casting in surface disclosed by the invention, has protection mould by being prepared on mould base material homosphere
Have the double-decker of matrix, the deformable transition layer and there is high-strength spy which is improved by intensity, hardness, fatigue resistance
Property resist blocking and that adhesion layer form.Surface depletion layer is to make surface that microstructure occur by external force effect to deform, and tissue is presented
Network of dislocation structure, dislocation density greatly improve, and crystallite dimension reduces, and surface resist blocking and that adhesion layer is by deposited metal member
Element and nonmetalloid obtain for the coating of main composition.The die casting of the surface double-decker passes through areal deformation
The combination of layer and resist blocking and that adhesion layer is crossed, tool is wear-resisting, impact resistance enhancing, avoids the adhesion of stickum during production, remains,
And mold clean is reduced, the production cost of infringement, extends the service life of mould.
Preparation method disclosed by the invention, can pass through a variety of sides such as laser-impact, shot-peening preparing areal deformation transition zone
Formula carries out, and applicability is extensive, and impact means, pressure are used according to different functional die requirements>1Gpa, it is anti-stick attached preparing
Layer to may be selected to be handled in laser chemical vapor deposition or metal organic chemical vapor deposition or physical vapour deposition (PVD), in table
Face deposition resist blocking and that adhesion layer is carried out using vacuum or under the conditions of compressing, in the case that vacuum is higher, the thing of thermal evaporation out
Matter atom or molecule have longer mean free path, thus can linearly be shifted from source material surface, deposit to lining
The surface at bottom, will not collide and chemically react with the molecule of foreign gas or other gases in the process.This method energy
Enough die life 5-16 times will be significantly improved, the preparation method is easy to operate, and treatment effeciency is high.
Brief description of the drawings
Fig. 1 is the structure diagram of the surface double-decker die casting of the present invention.
Wherein, 1 is mould base material homosphere；21 be areal deformation transition zone；22 be surface resist blocking and that adhesion layer.
Embodiment
With reference to specific embodiment, the present invention is described in further detail, it is described be explanation of the invention and
It is not to limit.
Embodiment 1
Referring to Fig. 1, a kind of surface double-decker die casting, by mould base material homosphere 1,21 and of areal deformation transition zone
Surface resist blocking and that adhesion layer 22 is formed.Areal deformation transition zone 21 is obtained by using laser-impact mode, areal deformation transition
Layer thickness is 0.1um.Surface resist blocking and that adhesion layer 22 is made of zirconium oxide+TiAlN, and wherein zirconium oxide mass percent is
50%, surplus TiAlN, surface resist blocking and that adhesion layer are 0.05um, are obtained by using physical gas-phase deposite method.
The preparation method of above-mentioned surface double-decker die casting, comprises the following steps：
1) die matrix surface preparation, and use ultrasonic cleaning cleaning die casting matrix, cleaning in acetone soln
Time is 15min, then spare with deionized water rinsing, drying；
2) die surface deformation process uses laser-impact, applies the pressure of 2Gpa in die surface and surface is produced strongly
Plastic deformation has the function that change mould top layer microstructure, obtains layer thickness 0.1um；
Wherein, laser-impact die surface 9 times.Parameters of laser beam：Laser power density is (6 × 109W/cm2, pulse is wide
Spend for 100ns, surge 2GPa.
To improve stress crest value, need first to cover restraint layer again after coating black coating on sample.Areal deformation transition zone
The single deformation or the multiple deformation of single amplitude of deformation 3%~200% that plastic deformation ε is 20%~300%, organize Presence Bit
Wrong entanglement network, dislocation density is 10~10000 times higher than base material homogeneous area, and crystallite dimension or subgrain size are base material homogeneous
Less than the 1/5 of area, and preferable particle size is 20nm~800nm；
3) polished step by step using the sand paper of 400#, 600#, 1000# and remove die surface oxide, sunk with physical vapor
Product method is anti-stick attached on die surface one layer of zirconium oxide+TiAlN resist blocking and that adhesion layer of deposition, layer thickness 0.05um, surface
The component for layer is mass percent, zirconium oxide 50%, surplus TiAlN；
4) it is cooled to room temperature, surface double-decker die casting is made.
Embodiment 2
A kind of surface double-decker die casting, by mould base material homosphere, areal deformation transition zone and surface resist blocking and that
Adhesion layer is formed.Areal deformation transition zone is obtained by using laser-impact mode, and areal deformation transition region thickness is 5um.Table
Face resist blocking and that adhesion layer is made of zirconium oxide+TiAlN, and wherein zirconium oxide mass percent is 50%, surplus TiAlN, surface
Resist blocking and that adhesion layer is 0.3um, is obtained by using physical gas-phase deposite method.
The preparation method of above-mentioned surface double-decker die casting, comprises the following steps：
1) die matrix surface preparation, and use ultrasonic cleaning cleaning die casting matrix, cleaning in acetone soln
Time is 15min, then spare with deionized water rinsing, drying；
2) die surface deformation process uses laser-impact, applies the pressure of 5Gpa in die surface and surface is produced strongly
Plastic deformation has the function that change mould top layer microstructure, obtains layer thickness 5um；
Wherein, laser-impact die surface 9 times, parameters of laser beam：Laser power density is 7 × 109W/cm2, pulse width
For 100ns, surge 5GPa.To improve stress crest value, need first to cover restraint layer again after coating black coating on sample.Table
The single deformation or the multiple change of single amplitude of deformation 3%~200% that facial disfigurement transition zone plastic deformation ε is 20%~300%
The entanglement network of dislocation is presented in shape, tissue, and dislocation density is 10~10000 times higher than base material homogeneous area, crystallite dimension or subgrain
Size is less than the 1/5 of base material homogeneous area, and preferable particle size is 20nm~800nm；
3) polished step by step using the sand paper of 400#, 600#, 1000# and remove die surface oxide, sunk with physical vapor
Product method deposits one layer of zirconium oxide+TiAlN resist blocking and that adhesion layer, layer thickness 0.3um, the attachment of surface resist blocking and that in die surface
The component of layer is mass percent, zirconium oxide 50%, surplus TiAlN；
4) it is cooled to room temperature, surface double-decker die casting is made.
Embodiment 3
A kind of surface double-decker die casting, by mould base material homosphere, areal deformation transition zone and surface resist blocking and that
Adhesion layer is formed.Areal deformation transition zone is obtained by using shot-peening impact mode, and areal deformation transition region thickness is 0.1um.
Surface resist blocking and that adhesion layer is made of SiC+TiAlN, and wherein SiC mass percents are 40%, surplus TiAlN, and surface is anti-stick
Even adhesion layer is 0.05um, is obtained by using physical gas-phase deposite method.
The preparation method of above-mentioned surface double-decker die casting, comprises the following steps：
1) die matrix surface preparation, and use ultrasonic cleaning cleaning die casting matrix, cleaning in acetone soln
Time is 15min, then spare with deionized water rinsing, drying；
2) applying pressure using steel shot peen in die surface makes the surface strong plastic deformation of generation reach change mould table
The effect of layer microstructure, which is 0.1um；
Applying the pressure of 2Gpa in die surface makes the surface strong plastic deformation of generation reach the change microcosmic knot in mould top layer
The effect of structure, obtains layer thickness 1um, is using shot-peening impact parameter：The hardness of bullet is 60HRC, velocity of shot 90m/s,
Surface roughness is 100um, shot-peening granularity preferably 40 mesh.Areal deformation transition zone plastic deformation ε is 20%~300% single
The entanglement network of dislocation is presented in deformation or the multiple deformation of single amplitude of deformation 3%~200%, tissue, and dislocation density compares base material
Homogeneous area is 10~10000 times high, and crystallite dimension or subgrain size are less than the 1/5 of base material homogeneous area, and preferable particle size is
20nm~800nm；
3) polished step by step using the sand paper of 400#, 600#, 1000# and remove die surface oxide, sunk with physical vapor
Product method deposits one layer of SiC+TiAlN resist blocking and that adhesion layer, layer thickness 0.05um, surface resist blocking and that adhesion layer in die surface
Component be mass percent, SiC 40%, surplus TiAlN；
4) it is cooled to room temperature, surface double-decker die casting is made.
Embodiment 4
A kind of surface double-decker die casting, by mould base material homosphere, areal deformation transition zone and surface resist blocking and that
Adhesion layer is formed.Areal deformation transition zone is obtained by using shot-peening impact mode, and areal deformation transition region thickness is 5um.Table
Face resist blocking and that adhesion layer is made of SiC+TiAlN, and wherein SiC mass percents are 40%, surplus TiAlN, surface resist blocking and that
Adhesion layer is 0.3um, is obtained by using physical gas-phase deposite method.
The preparation method of above-mentioned surface double-decker die casting, comprises the following steps：
1) die matrix surface preparation, and use ultrasonic cleaning cleaning die casting matrix, cleaning in acetone soln
Time is 15min, then spare with deionized water rinsing, drying；
2) applying pressure using steel shot peen in die surface makes the surface strong plastic deformation of generation reach change mould table
The effect of layer microstructure, which is 5um.Applying the pressure of 2Gpa in die surface makes surface produce strong plastic deformation
Have the function that to change mould top layer microstructure, obtain layer thickness 1um, be using shot-peening impact parameter：The hardness of bullet
For 65HRC, velocity of shot 96m/s, surface roughness 100um, shot-peening granularity preferably 40 mesh.The moulding change of areal deformation transition zone
Twining for dislocation is presented in the single deformation or the multiple deformation of single amplitude of deformation 3%~200% that shape ε is 20%~300%, tissue
Netting network, dislocation density is 10~10000 times higher than base material homogeneous area, and crystallite dimension or subgrain size are the 1/ of base material homogeneous area
Less than 5, and preferable particle size is 20nm~800nm；
3) polished step by step using the sand paper of 400#, 600#, 1000# and remove die surface oxide, sunk with physical vapor
Product method deposits one layer of SiC+TiAlN resist blocking and that adhesion layer, layer thickness 0.3um, surface resist blocking and that adhesion layer in die surface
Component be mass percent, SiC 40%, surplus TiAlN；
4) it is cooled to room temperature, surface double-decker die casting is made.
In conclusion double-decker die casting in surface disclosed by the invention, includes mould base material homosphere and its surface
The double-decker of deformable transition layer and surface resist blocking and that adhesion layer, areal deformation transition zone are to make surface by external force effect
Microstructure deforms, and dislocation network structure is presented in tissue, and dislocation density greatly improves, and crystallite dimension reduces, surface resist blocking and that
Adhesion layer is to be obtained by deposited metal element and nonmetalloid for the coating of main composition.
The surface double-decker die casting is mainly completed by following steps：The pretreatment of mould base material homosphere,
Surface deformation processing, deposition anti-stick coat, cooling.The various ways such as laser-impact, bead can be selected in deformation process, sink
Laser chemical deposition, metal organic chemical vapor deposition or physical vapour deposition (PVD) can be selected in product resist blocking and that layer.It is double by the surface
The protection of Rotating fields make it that die casting is wear-resisting, impact resistance enhancing, avoids the adhesion of stickum during production, remains, and
Mold clean is reduced, the production cost of infringement, extends the service life of mould.
Claims (10)
1. a kind of surface double-decker die casting, it is characterised in that including mould base material homosphere (1) and from the bottom to top successively
The areal deformation transition zone (21) and surface resist blocking and that adhesion layer (22) being disposed there above；Wherein：
Areal deformation transition zone (21) is to deform to change the table that the original microstructure of die matrix material is formed based on microstructure
Layer region, the thickness of areal deformation transition zone (21) is 0.05~300 μm；
Surface resist blocking and that adhesion layer (22) is the surface attachment layer that substrate material surface formation is deposited on based on material, and surface is anti-stick
The thickness for connecting adhesion layer (22) is 0.05~3 times of areal deformation transition zone (21) thickness.
2. double-decker die casting in surface according to claim 1, it is characterised in that the areal deformation transition zone
(21) the multiple deformation that the single deformation or single amplitude of deformation that plastic deformation ε is 20%~300% are 3%~200%, its
The entanglement network structure of dislocation is presented in tissue.
3. double-decker die casting in surface according to claim 1, it is characterised in that areal deformation transition zone (21)
Dislocation density is 10~10000 times higher than mould base material homosphere (1), and crystallite dimension or subgrain size are mould base material homosphere
(1) less than 1/5, and particle diameter is 20nm~800nm.
4. double-decker die casting in surface according to claim 1, it is characterised in that the surface resist blocking and that adhesion layer
(22) it is by coating that metallic element and nonmetalloid are component.
5. double-decker die casting in surface according to claim 4, it is characterised in that surface resist blocking and that adhesion layer (22)
Selected from aluminium oxide, zirconium oxide, TiAlN, TiAlCN, SiC, titanium carbide, chromium oxide, TiNAlC, titanium nitride, titanium oxide or ZrB2。
6. the preparation method of the surface double-decker die casting in Claims 1 to 5 described in any one, it is characterised in that
Comprise the following steps：
1) deformation process is carried out on mould base material homosphere (1) surface that cleaning treatment is crossed, it is 0.05~300 μm to prepare thickness
Areal deformation transition zone (21)；
Wherein, deformation process is to apply pressure on mould base material homosphere (1) surface to make it produce strong plastic deformation change table
Face microstructure；
2) one layer of resist blocking and that adhesion layer (22), table are deposited using vapour deposition process on obtained areal deformation transition zone (21) surface
The thickness of face resist blocking and that adhesion layer (22) is 0.05~3 times of areal deformation transition zone (21) thickness；
3) surface double-decker die casting after cooling, is made.
7. the preparation method of double-decker die casting in surface according to claim 6, it is characterised in that cleaning treatment is
Using the cleaning of solvent supersonic ripple or glow discharge cleaning mold base material homosphere (1).
8. the preparation method of double-decker die casting in surface according to claim 6, it is characterised in that in step 1),
Deformation process uses laser-impact, and laser-impact die surface 1~10 time, the laser power density of laser beam is 1 × 109W/cm2
~9 × 109W/cm2, pulse width is 10~200ns, surge>1GPa.
9. the preparation method of double-decker die casting in surface according to claim 6, it is characterised in that in step 1),
Deformation process is impacted using shot-peening, and bullet used in shot-peening is cast steel ball, cast iron pellets, glass ball and one kind or several in ceramic pellet
Kind, the hardness of bullet is 40~70HRC, velocity of shot>70m/s, surface roughness are 20~145um, shot-peening granularity preferably 5~
50 mesh.
10. the preparation method of double-decker die casting in surface according to claim 6, it is characterised in that in step 2),
Vapour deposition process uses laser induced chemical vapor depostion method, Metalorganic Chemical Vapor Deposition or physical vaporous deposition.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111136243A (en) * | 2020-01-13 | 2020-05-12 | 中北大学 | Casting method of ceramic/metal composite layer |
| CN113628982A (en) * | 2021-08-06 | 2021-11-09 | 纳狮新材料有限公司 | Packaging mold and preparation method thereof |
| US20220290289A1 (en) * | 2021-03-10 | 2022-09-15 | Vapor Technologies, Inc. | Pvd coatings for aluminum die casting molds |
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