CN114571187B - Forming method of high-power metal matrix composite material radiating substrate arched curved surface - Google Patents
Forming method of high-power metal matrix composite material radiating substrate arched curved surface Download PDFInfo
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- CN114571187B CN114571187B CN202210187532.5A CN202210187532A CN114571187B CN 114571187 B CN114571187 B CN 114571187B CN 202210187532 A CN202210187532 A CN 202210187532A CN 114571187 B CN114571187 B CN 114571187B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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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
- B22D19/00—Casting in, on, or around objects which form part of the product
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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
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/09—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using pressure
- B22D27/11—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using pressure making use of mechanical pressing devices
Abstract
A method for forming an arched curved surface of a high-power metal matrix composite heat dissipation substrate, the partition board of the forming die is processed into an arc-shaped concave part, and stamping the metal foil into an arch shape, so that the contact surface of the heat dissipation substrate and the radiator is processed into an arch-shaped curved surface. Firstly, forming and grinding the forming die partition plate to prepare the forming die partition plate with one surface being an arched inwards concave part and one surface being a plane, and then pasting the metal foil punched into the arched shape and another flat metal foil on two inner side surfaces of the forming die partition plate which are opposite to each other together to form a cavity with one surface being an arched curved surface and the other surface being a plane. Ceramic powder is filled into a cavity between two metal foils, the powder is vibrated and compacted, and then a forming die filled with the ceramic powder and the metal foils is placed into a preheating furnace to be preheated to a specified temperature. And after preheating, putting the forming die into a die-casting die for die-casting. And after the die casting is finished, demolding to obtain the high-power metal matrix ceramic composite material heat dissipation substrate with the surface covered with the uniform metal layer and one arched curved surface.
Description
Technical Field
The invention relates to the technical field of radiator processing technology, in particular to a method for forming an arched curved surface of a high-power metal matrix composite radiating substrate.
Background
The metal-based ceramic composite material is a metal-based thermal management composite material compounded by metal and ceramic, has the excellent performances of high thermal conductivity, thermal expansion coefficient matched with a chip, light weight, high rigidity and the like, and is an ideal high-power integrated circuit module packaging material at present.
The multi-chip assembly and the high-current power module are core components of aerospace, national defense construction, civil traffic, power transmission and transformation systems and the like, and at present, metal-based ceramic composite materials are mostly selected as heat dissipation substrate materials. The heat dissipation substrate made of the metal matrix ceramic composite material needs to be connected with a radiator to realize heat dissipation work, but because the metal matrix ceramic composite material heat dissipation substrate and the radiator are not made of the same material and have different thermal expansion coefficients, after the chip heats, the metal matrix ceramic composite material heat dissipation substrate and the radiator are heated to generate different thermal expansion deformation quantities, so that a gap is generated between the heat dissipation substrate and the radiator to influence heat transfer. In order to avoid the hollow separation between the heat dissipation substrate and the heat sink, the bottom surface of the heat dissipation substrate (i.e. the connection surface with the heat sink) is usually formed in an arched curved surface shape during design and production. When using bolt to fix the radiator and heat dissipation when the arched surfaces of the base plates are connected together, the radiator will deform with a certain pretension. When heated, the two materials gradually deform. Because the pre-tightening deformation is reserved, the radiator and the radiating substrate are slowly unfolded and leveled in the deformation process, so that the radiating substrate can be always attached to the surface of the radiator component without separation. The applicant provides a method for processing an arched curved surface of a high-power metal-based ceramic composite material heat dissipation substrate. By preparing the arched concave forming die partition plate in advance, stamping the metal foil into an arched curved surface, then performing die casting, and compounding the molten metal liquid with the metal foil and the ceramic powder, and finally carrying out numerical control turning on the metal foil layer so as to finish the forming processing of the arched surface.
The currently known methods of forming an arched surface are as follows: two metal foils with different thicknesses are tightly attached to the inner sides of two opposite partition plates of a forming die, then ceramic powder is filled into a cavity between the two metal foils, the powder is vibrated and compacted, and the forming die filled with the ceramic powder and the metal foils is placed into a preheating furnace to be preheated to a specified temperature. And after preheating, putting the forming die into a die-casting die for die-casting. And after the die casting is finished, demolding and taking out the heat dissipation substrate. And clamping the heat dissipation substrate on a numerical control lathe, turning the thick metal foil surface outwards during clamping, performing end surface numerical control turning on the thick metal foil surface, and turning an arched radian according to the product design requirement, thereby realizing the forming processing of the arched curved surface of the metal matrix ceramic composite heat dissipation substrate. The forming method has simple process, but has great defects: the wall thickness of the metal layer of the arched curved surface is uneven, namely the wall thickness of the arched part is large, and the wall thickness of the four peripheral walls is thin. The uneven wall thickness can cause uncontrollable deformation of the metal matrix ceramic composite material heat dissipation substrate, and the stability of the heat dissipation substrate is seriously influenced.
Disclosure of Invention
The applicant provides a method for forming an arched curved surface of a high-power metal matrix composite heat dissipation substrate, aiming at the defects in the prior art, so that the problems in the prior art are effectively solved, and the stability of the product is ensured.
The technical scheme adopted by the invention is as follows:
a method for forming an arched curved surface of a high-power metal matrix composite heat dissipation substrate comprises the following operation steps:
the first step is as follows: preparing a flat metal foil;
the second step is that: designing a male die and a female die matched with the flat metal foil;
the third step: putting the flat metal foil into a designed male die and a designed female die, and performing punch forming on the metal foil through a punching head to obtain a first metal foil with an arched curved surface;
the fourth step: processing one surface of a partition plate used in the die-casting process into a forming die partition plate with an inwards concave curved surface according to the requirement of an arched radian designed by a product;
the fifth step: spraying a release agent on the forming die partition plate, then pasting a first metal foil with an arched curved surface on the inner concave surface of the forming die partition plate, and pasting a second metal foil on the plane of the other flat partition plate opposite to the inner concave surface;
and a sixth step: assembling a set of forming dies by a plurality of forming die partition plates adhered with a first metal foil and a second metal foil with arched curved surfaces;
the seventh step: filling the prepared ceramic powder into a cavity of a forming die;
eighth step: placing the forming die filled with the ceramic powder on a vibrating table, vibrating and compacting the powder;
the ninth step: the ceramic powder and the first metal foil are filled placing a forming die of the second metal foil into a preheating furnace to preheat to 450-610 ℃;
the tenth step: preheating the die-casting die, the base plate and the pressure head, and spraying a release agent on the contact surface of the die-casting die, the base plate and the pressure head with the die-casting molten metal;
first, the eleven points of the design the method comprises the following steps: putting the preheated forming die into a die-casting die, then injecting molten metal liquid into the die-casting die, and infiltrating the molten metal liquid into the ceramic powder under the extrusion of a press head of a press; after the pressure maintaining and cooling are carried out for 5-20 minutes, the pressure is removed and the metal ingot with the metal matrix ceramic composite material heat dissipation substrate blank inside is ejected out;
the twelfth step: sawing a metal ingot, removing a forming die, and taking out a metal matrix ceramic composite heat dissipation substrate blank from the forming die, wherein a metal matrix ceramic composite core part is firmly combined with an arched metal foil and a flat metal foil;
the thirteenth step: clamping the metal matrix ceramic composite heat dissipation substrate blank on a numerical control lathe fixture, and carrying out numerical control turning on the arched curved surface of the heat dissipation substrate according to the product design requirement to obtain a metal matrix ceramic composite heat dissipation substrate product meeting the size requirement of the designed arched curved surface of the product;
a fourteenth step of: and (4) carrying out related surface coating treatment and insulating layer printing process on the heat dissipation substrate product.
As a further improvement of the technical scheme:
the thickness of the flat metal foil is 0.2-2mm.
The thickness of the flat metal foil is 1mm.
The thickness of the second metal foil is 0.2-1mm.
The thickness of the second metal foil is 0.5mm.
The flat metal foil is in a cuboid structure.
In the ninth step, the preheating temperature of the molding die is 500 ℃.
In the tenth step, the dwell time was 15 minutes.
In the tenth step, cooling to below 100 ℃.
In the tenth step, cooling to 50 ℃.
The invention has the following beneficial effects:
the invention has compact and reasonable structure and convenient operation, and the core part of the metal-based ceramic composite material is firmly combined with the thin metal foil layer through the pretreatment of the metal foil and the forming die partition plate and the high-pressure die casting, thereby realizing the requirement that the surface of the radiating substrate is coated with metal and the metal layer on the bottom surface is an arch-shaped curved surface with uniform wall thickness.
The invention obtains the high-power metal matrix ceramic composite material heat dissipation substrate which is coated with a uniform metal layer on the surface according to the design requirement and is processed into an arched curved surface.
According to the design requirement, the contact surface of the high-power metal matrix ceramic composite material heat dissipation substrate and the radiator needs to be processed into an arched curved surface, so that the actual contact surface between the heat dissipation substrate and the radiator can be increased. The forming die partition plate and the metal foil (aluminum, silicon aluminum, silver and the like) are preprocessed respectively, namely: and processing the partition plate of the forming die into an arc-shaped concave part, and stamping the metal foil into an arch shape, so that the contact surface of the radiating substrate and the radiator is processed into an arch-shaped curved surface. Firstly, forming and grinding the forming die partition plate to prepare the forming die partition plate with one surface being an arched inwards concave part and one surface being a plane, and then pasting the metal foil punched into the arched shape and another flat metal foil on two inner side surfaces of the forming die partition plate which are opposite to each other together to form a cavity with one surface being an arched curved surface and the other surface being a plane. Ceramic powder is filled into a cavity between two metal foils, the powder is vibrated and compacted, and then a forming die filled with the ceramic powder and the metal foils is placed into a preheating furnace to be preheated to a specified temperature. And after preheating, putting the forming die into a die-casting die for die-casting. And after the die casting is finished, demolding to obtain the high-power metal-based ceramic composite material heat dissipation substrate with the surface covered with the uniform metal layer and one arched curved surface.
Drawings
Fig. 1 is a schematic structural view of the present invention for stamping and forming a metal foil.
FIG. 2 is a cross-sectional view of a mold plate having a concave curved surface according to the present invention.
FIG. 3 is a schematic structural diagram of the separator of the forming mold coated with a first metal foil and a second metal foil.
FIG. 4 is a schematic structural view of a molding die of the present invention.
FIG. 5 is a schematic structural view of the present invention after filling ceramic powder in a forming mold.
FIG. 6 shows a metal-infiltrated liquid of the present invention and (3) a schematic structural diagram in die casting.
FIG. 7 is a schematic view of the structure of the present invention during numerically controlled turning.
Fig. 8 is a product diagram of the heat dissipating substrate of the present invention.
Fig. 9 is a side view of the heat-dissipating substrate of the present invention.
Wherein the method comprises the following steps: 1. a flat metal foil; 2. a male die; 3. a female die; 4. a first metal foil; 5. a forming die partition plate; 6. a second metal foil; 7. forming a mould; 8. ceramic powder; 9. die casting; 10. a base plate; 11. a pressure head; 12. melting a molten metal; 13. a blank; 15. a heat dissipation substrate.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
As shown in fig. 1 to fig. 9, the method for forming the arched curved surface of the high-power metal matrix composite heat dissipation substrate of the embodiment includes the following steps:
the first step is as follows: preparing a flat metal foil 1;
the second step is that: designing a male die 2 and a female die 3 which are matched with the flat metal foil 1;
the third step: putting the flat metal foil 1 into a designed male die 2 and a designed female die 3, and performing punch forming on the metal foil 1 through a punching head to obtain a first metal foil 4 with an arched curved surface;
the fourth step: processing one surface of a partition plate used in the die-casting process into a forming die partition plate 5 with an inwards concave curved surface according to the requirement of the arched radian of the product design;
the fifth step: spraying a release agent on the forming die partition plate 5, then pasting a first metal foil 4 with an arched curved surface on the inner concave surface of the forming die partition plate 5, and pasting a second metal foil 6 on the plane of the other flat partition plate opposite to the inner concave surface;
and a sixth step: a plurality of first metal foils 4 with arch-shaped curved surfaces are adhered to the forming die partition plates 5 of the second metal foil 6 are assembled into a set of forming dies 7;
the seventh step: filling the prepared ceramic powder 8 into a cavity of a forming die 7;
eighth step: placing the forming die 7 filled with the ceramic powder 8 on a vibrating table, vibrating and compacting the powder;
the ninth step: placing the forming die 7 filled with the ceramic powder 8, the first metal foil 4 and the second metal foil 6 into a preheating furnace to be preheated to 450-610 ℃;
the tenth step: preheating a die-casting die 9, a backing plate 10 and a pressure head 11, and spraying a release agent on the contact surface of the die-casting die 9, the backing plate and the pressure head with die-casting molten metal;
the eleventh step: placing the preheated forming die 7 into a die-casting die 9, then injecting molten metal liquid into the die-casting die 9, and under the extrusion of a press head 11, the molten metal liquid permeates into the ceramic powder 8; after the pressure maintaining and cooling for 5-20 minutes, removing the pressure and ejecting the metal ingot 14 with the metal matrix ceramic composite heat dissipation substrate blank 13 inside;
the twelfth step: sawing a metal ingot 15, removing the forming die 7, and taking out the metal matrix ceramic composite heat dissipation substrate blank 13 from the forming die 7, wherein the metal matrix ceramic composite core part is firmly combined with the arched metal foil 4 and the flat metal foil 6;
and a thirteenth step of: and clamping the metal matrix ceramic composite heat dissipation substrate blank 13 on a numerical control lathe fixture, and carrying out numerical control turning on the arched curved surface of the heat dissipation substrate according to the product design requirement to obtain a metal matrix ceramic composite heat dissipation substrate product 15 meeting the size requirement of the designed arched curved surface of the product.
The fourteenth step is that: the heat dissipating substrate product 15 is subjected to a related surface plating process and an insulating layer printing process.
The thickness of the flat metal foil 1 is 0.2-2mm.
The thickness of the flat metal foil 1 is 1mm.
The thickness of the second metal foil 6 is 0.2-1mm.
The thickness of the second metal foil 6 is 0.5mm.
The flat metal foil 1 has a rectangular parallelepiped structure.
In the ninth step, the preheating temperature of the molding die 7 is 500 ℃.
In the tenth step, the dwell time was 15 minutes.
In the tenth step, cooling to below 100 ℃.
In the tenth step, cooling to 50 ℃.
The first embodiment is as follows:
the first step is as follows: preparing a flat plate a metal foil 1;
the second step is that: designing a male die 2 and a female die 3 which are matched with the flat metal foil 1;
the third step: the flat metal foil 1 is put into the designed male die 2 and female die 3, punching and forming the metal foil 1 through a punching head to obtain a first metal foil 4 with an arched curved surface;
fourth step of the method comprises the following steps: processing one surface of a partition plate used in the die-casting process into a forming die partition plate 5 with an inwards concave curved surface according to the requirement of an arched radian designed by a product;
the fifth step: spraying a release agent on the forming die partition plate 5, then pasting a first metal foil 4 with an arched curved surface on the inner concave surface of the forming die partition plate 5, and pasting a second metal foil 6 on the plane of the other flat partition plate opposite to the inner concave surface;
and a sixth step: assembling a set of forming dies 7 by a plurality of forming die partition plates 5 adhered with a first metal foil 4 and a second metal foil 6 with arch-shaped curved surfaces;
the seventh step: filling the prepared ceramic powder 8 into a cavity of a forming die 7;
eighth step: placing the forming die 7 filled with the ceramic powder 8 on a vibrating table, vibrating and compacting the powder;
the ninth step: placing the forming die 7 filled with the ceramic powder 8, the first metal foil 4 and the second metal foil 6 into a preheating furnace to be preheated to 450 ℃;
the tenth step: preheating a die-casting die 9, a backing plate 10 and a pressure head 11, and spraying a release agent on the contact surface of the die-casting die 9, the backing plate and the pressure head with die-casting molten metal;
the eleventh step: placing the preheated forming die 7 into a die-casting die 9, then injecting molten metal liquid into the die-casting die 9, and under the extrusion of a press head 11, the molten metal liquid permeates into the ceramic powder 8; cooling for 5 minutes under the condition of pressure maintaining, cooling to below 100 ℃, removing pressure and ejecting a metal ingot 14 with a metal matrix ceramic composite material heat dissipation substrate blank 13 inside;
the twelfth step: sawing a metal ingot 15, removing the forming die 7, and taking out the metal matrix ceramic composite heat dissipation substrate blank 13 from the forming die 7, wherein the metal matrix ceramic composite core part is firmly combined with the arched metal foil 4 and the flat metal foil 6;
and a thirteenth step of: and clamping the metal matrix ceramic composite heat dissipation substrate blank 13 on a numerical control lathe fixture, and carrying out numerical control turning on the arched curved surface of the heat dissipation substrate according to the product design requirement to obtain a metal matrix ceramic composite heat dissipation substrate product 15 meeting the size requirement of the designed arched curved surface of the product.
The fourteenth step is that: the heat dissipating substrate product 15 is subjected to a related surface plating process and an insulating layer printing process.
Example two:
the first step is as follows: preparing a flat metal foil 1;
the second step is that: designing a male die 2 and a female die 3 which are matched with the flat metal foil 1;
the third step: putting the flat metal foil 1 into a designed male die 2 and a designed female die 3, and performing punch forming on the metal foil 1 through a punching head to obtain a first metal foil 4 with an arched curved surface;
the fourth step: processing one surface of a partition plate used in the die-casting process into a forming die partition plate 5 with an inwards concave curved surface according to the requirement of the arched radian of the product design;
the fifth step: spraying a release agent on the forming die partition plate 5, then pasting a first metal foil 4 with an arched curved surface on the inner concave surface of the forming die partition plate 5, and pasting a second metal foil 6 on the plane of the other flat partition plate opposite to the inner concave surface;
and a sixth step: assembling a set of forming dies 7 by a plurality of forming die partition plates 5 adhered with a first metal foil 4 and a second metal foil 6 with arch-shaped curved surfaces;
the seventh step: filling the prepared ceramic powder 8 into a cavity of a forming die 7;
eighth step: placing the forming die 7 filled with the ceramic powder 8 on a vibrating table, vibrating and compacting the powder;
the ninth step: the ceramic powder 8 and the first metal foil 4 are filled placing the forming die 7 of the second metal foil 6 into a preheating furnace to be preheated to 610 ℃;
the tenth step: preheating a die-casting die 9, a backing plate 10 and a pressure head 11, and spraying a release agent on the contact surface of the die-casting die 9, the backing plate and the pressure head with die-casting molten metal;
the eleventh step: placing the preheated forming die 7 into a die-casting die 9, then injecting molten metal liquid into the die-casting die 9, and under the extrusion of a press head 11, the molten metal liquid permeates into the ceramic powder 8; cooling for 20 minutes under the condition of pressure maintaining, cooling to below 100 ℃, removing pressure and ejecting a metal ingot 14 with a metal matrix ceramic composite material heat dissipation substrate blank 13 inside;
the twelfth step: sawing a metal ingot 15, removing the forming die 7, and taking out the metal matrix ceramic composite heat dissipation substrate blank 13 from the forming die 7, wherein the metal matrix ceramic composite core part is firmly combined with the arched metal foil 4 and the flat metal foil 6;
the thirteenth step: and clamping the metal matrix ceramic composite heat dissipation substrate blank 13 on a numerical control lathe fixture, and carrying out numerical control turning on the arched curved surface of the heat dissipation substrate according to the product design requirement to obtain a metal matrix ceramic composite heat dissipation substrate product 15 meeting the size requirement of the designed arched curved surface of the product.
The fourteenth step is that: the heat dissipating substrate product 15 is subjected to a related surface plating process and an insulating layer printing process.
Example three:
the first step is as follows: preparing a flat metal foil 1;
the second step is that: designing a male die 2 and a female die 3 which are matched with the flat metal foil 1;
the third step: putting the flat metal foil 1 into a designed male die 2 and a designed female die 3, and performing punch forming on the metal foil 1 through a punching head to obtain a first metal foil 4 with an arched curved surface;
the fourth step: processing one surface of a partition plate used in the die-casting process into a forming die partition plate 5 with an inwards concave curved surface according to the requirement of the arched radian of the product design;
the fifth step: spraying a release agent on the forming die partition plate 5, then pasting a first metal foil 4 with an arched curved surface on the inner concave surface of the forming die partition plate 5, and pasting a second metal foil 6 on the plane of the other flat partition plate opposite to the inner concave surface;
and a sixth step: assembling a set of forming dies 7 by a plurality of forming die partition plates 5 adhered with a first metal foil 4 and a second metal foil 6 with arch-shaped curved surfaces;
the seventh step: filling the prepared ceramic powder 8 into a cavity of a forming die 7;
eighth step: placing the forming die 7 filled with the ceramic powder 8 on a vibrating table, vibrating and compacting the powder;
the ninth step: placing the forming die 7 filled with the ceramic powder 8, the first metal foil 4 and the second metal foil 6 into a preheating furnace to be preheated to 500 ℃;
the tenth step: preheating a die-casting die 9, a backing plate 10 and a pressure head 11, and spraying a release agent on the contact surface of the die-casting die 9, the backing plate and the pressure head with die-casting molten metal;
the eleventh step: placing the preheated forming die 7 into a die-casting die 9, then injecting molten metal liquid into the die-casting die 9, and under the extrusion of a press head 11, the molten metal liquid permeates into the ceramic powder 8; cooling for 15 minutes under the condition of pressure maintaining, cooling to 50 ℃, removing pressure and ejecting a metal ingot 14 with a metal matrix ceramic composite material heat dissipation substrate blank 13 inside;
the twelfth step: sawing a metal ingot 15, removing the forming die 7, and taking out the metal matrix ceramic composite heat dissipation substrate blank 13 from the forming die 7, wherein the metal matrix ceramic composite core part is firmly combined with the arched metal foil 4 and the flat metal foil 6;
the thirteenth step: and clamping the metal matrix ceramic composite heat dissipation substrate blank 13 on a numerical control lathe fixture, and carrying out numerical control turning on the arched curved surface of the heat dissipation substrate according to the product design requirement to obtain a metal matrix ceramic composite heat dissipation substrate product 15 meeting the size requirement of the designed arched curved surface of the product.
A fourteenth step of: the heat dissipating substrate product 15 is subjected to a related surface plating process and an insulating layer printing process.
According to the design requirement, the contact surface of the high-power metal-based ceramic composite material radiating substrate and the radiator needs to be processed into the arched curved surface, so that the actual contact surface between the radiating substrate and the radiator is increased, the high-power metal-based ceramic composite material radiating substrate with the surface covered with the uniform metal layer and the arched curved surface can be conveniently obtained.
The above description is intended to be illustrative and not restrictive, and the scope of the invention is defined by the appended claims, which may be modified in any manner within the scope of the invention.
Claims (9)
1. A method for forming an arched curved surface of a high-power metal matrix composite radiating substrate is characterized by comprising the following steps: the method comprises the following operation steps:
the first step is as follows: preparing a flat metal foil (1); the flat metal foil (1) is of a cuboid structure;
the second step is that: designing a male die (2) and a female die (3) matched with the flat metal foil (1);
the third step: putting the flat metal foil (1) into a designed male die (2) and a designed female die (3), and performing punch forming on the metal foil (1) through a punching head to obtain a first metal foil (4) with an arched curved surface;
the fourth step: processing one surface of a partition plate used in the die-casting process into a forming die partition plate (5) with an inwards concave curved surface according to the requirement of the arched radian of the product design;
the fifth step: spraying a release agent on the forming die partition plate (5), then pasting a first metal foil (4) with an arched curved surface on the concave surface of the forming die partition plate (5), and pasting a second metal foil (6) on the plane of the other flat partition plate opposite to the concave surface;
and a sixth step: assembling a set of forming die partition plates (5) which are adhered with a first metal foil (4) and a second metal foil (6) with arched curved surfaces into a set of forming die (7);
the seventh step: filling the prepared ceramic powder (8) into a cavity of a forming die (7);
eighth step: placing the forming die (7) filled with the ceramic powder (8) on a vibrating table, vibrating and compacting the powder;
the ninth step: placing a forming die (7) filled with ceramic powder (8), a first metal foil (4) and a second metal foil (6) into a preheating furnace to be preheated to 450-610 ℃;
the tenth step: preheating a die-casting mold (9), a backing plate (10) and a pressure head (11), and spraying a release agent on the contact surface of the die-casting mold and the pressure head with die-casting molten metal;
the eleventh step: putting the preheated forming die (7) into a die-casting die (9), then injecting molten metal liquid into the die-casting die (9), and under the extrusion of a press head (11), the molten metal liquid permeates into the ceramic powder (8); after the pressure maintaining and cooling are carried out for 5 to 20 minutes, the metal ingot (14) with the metal matrix ceramic composite material heat dissipation substrate blank (13) inside is removed and ejected;
the twelfth step: sawing a metal ingot (15), removing a forming die (7), and taking out a metal matrix ceramic composite heat dissipation substrate blank (13) from the forming die (7), wherein a metal matrix ceramic composite core part is firmly combined with an arched metal foil (4) and a flat metal foil (6);
the thirteenth step: clamping a metal matrix ceramic composite material radiating substrate blank (13) on a numerical control lathe fixture, and carrying out numerical control turning on the arched curved surface of the radiating substrate according to the design requirement of a product to obtain a metal matrix ceramic composite material radiating substrate product (15) meeting the size requirement of the designed arched curved surface of the product;
the fourteenth step is that: relating heat-dissipating substrate products (15) surface coating treatment and insulating layer printing process.
2. The method for forming the arched curved surface of the high-power metal matrix composite heat dissipation substrate as recited in claim 1, wherein: the thickness of the flat metal foil (1) is 0.2-2mm.
3. The method for forming the arched curved surface of the high-power metal matrix composite heat dissipation substrate as recited in claim 2, wherein: the thickness of the flat metal foil (1) is 1mm.
4. The method for forming the arched curved surface of the high-power metal matrix composite heat dissipation substrate as recited in claim 1, wherein: the second metal foil (6)) is 0.2-1mm thick.
5. The method for forming the arched curved surface of the high-power metal matrix composite heat dissipation substrate as recited in claim 4, wherein: the thickness of the second metal foil (6) is 0.5mm.
6. The method for forming the arched curved surface of the high-power metal matrix composite heat dissipation substrate as recited in claim 1, wherein: in the ninth step, the preheating temperature of the molding die (7) is 500 ℃.
7. The method for forming the arched curved surface of the high-power metal matrix composite heat dissipation substrate as recited in claim 1, wherein: in the tenth step, the dwell time was 15 minutes.
8. The method for forming the arched curved surface of the high-power metal matrix composite heat dissipation substrate as recited in claim 1, wherein: in the tenth step, cooling to below 100 ℃.
9. A high power metal base as claimed in claim 1 a method for forming an arched curved surface of a composite material radiating substrate, the method is characterized in that: in the tenth step, cooling to 50 ℃.
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