CN115163704B - Aluminum magnesium alloy die casting for automobile parts and die casting method thereof - Google Patents
Aluminum magnesium alloy die casting for automobile parts and die casting method thereof Download PDFInfo
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- CN115163704B CN115163704B CN202210799276.5A CN202210799276A CN115163704B CN 115163704 B CN115163704 B CN 115163704B CN 202210799276 A CN202210799276 A CN 202210799276A CN 115163704 B CN115163704 B CN 115163704B
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- 229910000861 Mg alloy Inorganic materials 0.000 title claims abstract description 107
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 title claims abstract description 107
- 238000004512 die casting Methods 0.000 title claims abstract description 82
- 238000000034 method Methods 0.000 title claims abstract description 48
- 239000000919 ceramic Substances 0.000 claims abstract description 96
- 238000005245 sintering Methods 0.000 claims abstract description 22
- 239000000843 powder Substances 0.000 claims abstract description 21
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 14
- 239000000956 alloy Substances 0.000 claims abstract description 14
- 238000003754 machining Methods 0.000 claims abstract description 9
- 238000007689 inspection Methods 0.000 claims abstract description 7
- 230000008569 process Effects 0.000 claims description 25
- 238000009423 ventilation Methods 0.000 claims description 8
- 238000001513 hot isostatic pressing Methods 0.000 claims description 7
- 238000005266 casting Methods 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 238000005553 drilling Methods 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 238000005498 polishing Methods 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 238000011179 visual inspection Methods 0.000 claims description 3
- 229910001060 Gray iron Inorganic materials 0.000 abstract description 6
- 238000005299 abrasion Methods 0.000 abstract description 5
- 238000000748 compression moulding Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 description 8
- 239000002994 raw material Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/02—Braking members; Mounting thereof
- F16D65/12—Discs; Drums for disc brakes
- F16D65/125—Discs; Drums for disc brakes characterised by the material used for the disc body
-
- 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
-
- 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
-
- 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
- B22F3/02—Compacting only
-
- 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
- B22F3/10—Sintering only
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/02—Braking members; Mounting thereof
- F16D65/12—Discs; Drums for disc brakes
- F16D65/127—Discs; Drums for disc brakes characterised by properties of the disc surface; Discs lined with friction material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/02—Braking members; Mounting thereof
- F16D65/12—Discs; Drums for disc brakes
- F16D65/128—Discs; Drums for disc brakes characterised by means for cooling
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Braking Arrangements (AREA)
Abstract
The application relates to an aluminum magnesium alloy die casting for an automobile part and a die casting method thereof, which belong to the field of automobile die castings, wherein the aluminum magnesium alloy die casting for the automobile part comprises an aluminum magnesium alloy inner core which is arranged in a cake shape, and a mounting hole is formed in the middle; the ceramic layer is covered on the outer surface of the aluminum magnesium alloy inner core; and the spokes are arranged in the aluminum magnesium alloy. The aluminum magnesium alloy die casting method comprises the steps of compression molding, compact assembly, powder sintering, steam treatment, alloy die casting, machining and QC quality inspection. The application improves the situation that the abrasion resistance of the brake disc of gray cast iron is poor.
Description
Technical Field
The application relates to the field of automobile die castings, in particular to an aluminum magnesium alloy die casting for an automobile part and a die casting method thereof.
Background
The brake disc and the brake calipers are important parts of an automobile front wheel braking system, the brake disc is connected with a hub of a wheel, the brake calipers are connected with an axle system, and when braking, the brake calipers hug the brake disc tightly, and the speed reduction of the wheel is realized through friction. In order to reduce the cost, a considerable part of brake discs on the market are manufactured by gray cast iron.
Aiming at the related technology, the abrasion resistance of the gray cast iron brake disc is poor, the abrasion resistance of the burnt gray cast iron brake disc is further reduced under the action of friction heat when the brake disc is braked for a long time, the service life of the brake disc is fast in attenuation, the friction force is reduced, and the brake braking force is reduced.
Disclosure of Invention
In order to improve the situation that the abrasion resistance of a brake disc of gray cast iron is poor, the application provides an aluminum magnesium alloy die casting for an automobile part and a die casting method thereof.
In a first aspect, the application provides an aluminum magnesium alloy die casting for auto parts adopts following technical scheme:
an aluminum magnesium alloy die casting for an automotive part, comprising:
the aluminum magnesium alloy inner core is arranged in a round cake shape, and the middle part of the aluminum magnesium alloy inner core is provided with a mounting hole;
the ceramic layer is covered on the outer surface of the aluminum magnesium alloy inner core;
and the spokes are arranged in the aluminum magnesium alloy.
By adopting the scheme, when the aluminum magnesium alloy die casting is used as a brake disc and braked, the brake calipers rub the surface of the ceramic layer, the ceramic layer improves the wear resistance and high temperature resistance of the aluminum magnesium alloy die casting, the probability of thermal attenuation caused by friction heat in the braking process is reduced, the weight of the aluminum magnesium alloy die casting is reduced, and the running oil consumption of a vehicle is reduced. The spoke strengthens the structural strength of the aluminum-magnesium alloy inner core, improves the structural stability of the aluminum-magnesium alloy inner core in a high-temperature state, and reduces the fracture probability of the aluminum-magnesium alloy inner core in the braking process.
Preferably, a plurality of protruding blocks are arranged on one side of the ceramic layer corresponding to the aluminum magnesium alloy inner core, and the protruding blocks are embedded in the aluminum magnesium alloy inner core.
By adopting the scheme, the bump enhances the connection strength of the ceramic layer and the aluminum-magnesium alloy inner core, and reduces the probability of separation of the ceramic layer and the aluminum-magnesium alloy inner core due to friction force or heating of the brake caliper.
Preferably, the ceramic layer and the aluminum-magnesium alloy inner core are jointly provided with a plurality of ventilation holes, and the ventilation holes penetrate through the ceramic layer and the aluminum-magnesium alloy inner core.
Through adopting above-mentioned scheme, the ventilation hole increases the area of contact of aluminum magnesium alloy die casting and air current, strengthens the cooling effect of air current to aluminum magnesium alloy die casting, reduces the condition that aluminum magnesium alloy die casting is high in temperature and takes place.
Preferably, a plurality of scribing grooves are formed in the outer surface of the ceramic layer.
Through adopting above-mentioned scheme, the piece that drops when brake calliper and almag die casting friction is discharged fast through the scribing groove, increases ceramic layer frictional force, also further reinforcing ceramic layer surface's heat radiating area.
Preferably, the aluminum-magnesium alloy inner core is prepared by adopting a die casting process, the melting point of the selected aluminum-magnesium alloy is more than 500 ℃, the ceramic layer is made of wear-resistant ceramic, and the ceramic layer and the spokes are prepared by adopting powder sintering.
By adopting the scheme, the die casting process improves the production quality of the aluminum magnesium alloy inner core, enhances the strength of the aluminum magnesium alloy inner core and improves the casting efficiency of the aluminum magnesium alloy inner core. The wear-resistant ceramic is adopted as the ceramic layer, so that the wear resistance of the ceramic layer is enhanced, and the aging of the ceramic layer is delayed. The powder sintering process can easily realize the compounding of various types, simplify the molding process and improve the product precision.
In a second aspect, the present application provides an aluminum magnesium alloy die casting method, which adopts the following technical scheme:
the die casting method of the aluminum magnesium alloy die casting comprises the following steps:
s1, press forming: using a press and a corresponding die to respectively press the alloy powder and the ceramic powder into a spoke pressed compact and a ceramic pressed compact;
s2, assembling a pressed blank: assembling and combining the spoke pressed compact and the ceramic pressed compact;
s3, powder sintering: feeding the spoke pressed compact and the ceramic pressed compact into a hot isostatic pressing machine together for sintering, wherein a hot isostatic pressing method is adopted in the sintering process, and the steps are used for preparing the spoke and the hollow ceramic layer;
s4, steam treatment: placing the spoke and the ceramic layer which are prepared by sintering in a hot steam environment until the appearance and the pores of the spoke and the ceramic layer form a layer of fine oxide film;
s5, alloy die casting: placing the spoke and ceramic layer assembly subjected to steam treatment into a brake disc die for insert casting, and adopting a die casting process to die-cast the aluminum-magnesium alloy into an aluminum-magnesium alloy inner core, wherein the aluminum-magnesium alloy inner core, the spoke and the ceramic layer are embedded and cast into an integrated blank;
s6, machining: cutting, drilling and polishing the blank to obtain a die casting;
s7, QC quality inspection: and (3) performing quality inspection on the die castings by using visual inspection, ultrasonic flaw detection and the like of workers, and enabling qualified die castings to enter stock.
Preferably, the vent holes, the score lines, the bumps are made in the press forming, the powder sintering and the alloy die casting steps.
Through adopting above-mentioned scheme, ventilation hole, score line groove, lug and ceramic compact and almag inner core integrated into one piece at the in-process of compression molding and alloy die-casting, reduced the work load of later stage machining, improved production efficiency, reduced the raw materials loss.
Preferably, the ceramic green compact includes an upper green compact and a lower green compact, and the upper green compact and the lower green compact can be fastened to each other.
By adopting the scheme, the ceramic green compact is formed by buckling the upper green compact and the lower green compact, so that the difficulty in forming the ceramic green compact is reduced, the die for press forming is simplified, and the equipment cost of enterprises is reduced.
Preferably, the spoke green compact can be inserted into the lower green compact.
By adopting the scheme, the spoke pressed compact is inserted into the lower pressed compact, so that the stability of the relative positions of the spoke pressed compact and the lower pressed compact is improved, the probability of skewing of the spoke pressed compact in the ceramic pressed compact in the carrying and powder sintering processes is reduced, and the yield of products is improved.
In summary, the present application has the following beneficial effects:
1. the ceramic layer improves the wear resistance and the high temperature resistance of the aluminum magnesium alloy die casting, and reduces the probability of heat attenuation caused by friction heat in the braking process;
2. the powder sintering process can easily realize the combination of various types, simplify the molding process and improve the product precision;
3. the vent hole, the scribing groove and the lug are integrally formed with the ceramic pressed compact and the aluminum-magnesium alloy inner core in the compression molding and alloy die casting processes, so that the workload of post machining is reduced, the production efficiency is improved, and the raw material loss is reduced.
Drawings
Fig. 1 is a schematic structural view of an aluminum magnesium alloy die casting for an automobile part according to an embodiment of the present application;
FIG. 2 is a cross-sectional view of an aluminum magnesium alloy die cast for an automotive part according to an embodiment of the present application;
FIG. 3 is an exploded view of an aluminum magnesium alloy die cast for an automotive part according to an embodiment of the present application;
FIG. 4 is a flow chart of a die casting method of an aluminum magnesium alloy die casting according to an embodiment of the present application;
FIG. 5 is a schematic view of the structure of a ceramic compact in the die casting method of an aluminum magnesium alloy die casting according to the embodiment of the application;
fig. 6 is a schematic structural view of a spoke compact in the aluminum magnesium alloy die casting method according to the embodiment of the application.
Reference numerals illustrate: 1. an aluminum magnesium alloy inner core; 2. spokes; 3. a ceramic layer; 31. a bump; 32. scribing grooves; 33. a vent hole; 4. compacting spokes; 41. a tensile flange; 42. an abutting plate; 43. inserting blocks; 5. ceramic green compacts; 51. pressing a blank; 52. and (5) pressing down the green compact.
Detailed Description
The present application is described in further detail below in conjunction with figures 1-6.
The embodiment of the application discloses an aluminum magnesium alloy die casting for auto parts. Referring to fig. 1 and 2, comprising a pie-shaped aluminum magnesium alloy core 1, the aluminum magnesium alloy has a melting point greater than 500 degrees celsius. A plurality of spokes 2 are arranged in the aluminum-magnesium alloy inner core 1, the spokes 2 are arranged along the circumferential direction of the aluminum-magnesium alloy inner core 1 in an array manner, and the spokes 2 are arranged radially by taking the axis of the aluminum-magnesium alloy as the center. The outside of the aluminum magnesium alloy inner core 1 is fixedly connected with a ceramic layer 3, the ceramic layer 3 covers the outer surface of the aluminum magnesium alloy inner core 1, and the ceramic layer 3 is made of wear-resistant ceramic with aluminum oxide as a main component. The aluminum magnesium alloy inner core 1 is manufactured by adopting a die casting process, and the ceramic layer 3 and the spokes 2 are manufactured by adopting powder sintering. When the aluminum magnesium alloy die casting is used as a brake disc, the brake calipers rub the surface of the ceramic layer 3, the ceramic layer 3 improves the wear resistance and high temperature resistance of the aluminum magnesium alloy die casting, the probability of thermal attenuation caused by friction heat in the braking process is reduced, the aluminum magnesium alloy inner core 1 reduces the overall weight of the die casting, and the running oil consumption of a vehicle is reduced. The spoke 2 strengthens the structural strength of the aluminum-magnesium alloy inner core 1, improves the structural stability of the aluminum-magnesium alloy inner core 1 in a high-temperature state, and reduces the fracture probability of the aluminum-magnesium alloy inner core 1 in the braking process.
Referring to fig. 2 and 3, a plurality of protruding blocks 31 are fixedly connected to one side of the ceramic layer 3, corresponding to the aluminum magnesium alloy inner core 1, the protruding blocks 31 are embedded in the aluminum magnesium alloy inner core 1, the protruding blocks 31 enhance the connection strength between the ceramic layer 3 and the aluminum magnesium alloy inner core 1, and the probability that the ceramic layer 3 is separated from the aluminum magnesium alloy inner core 1 due to friction force or heating of a brake caliper is reduced. A plurality of scribing grooves 32 are formed in the outer surface of the ceramic layer 3, the scribing grooves 32 are radially arranged with the axis of the aluminum magnesium alloy as the center, and fragments falling off when the brake caliper and the aluminum magnesium alloy die casting rub are rapidly discharged through the scribing grooves 32, so that the friction force of the ceramic layer 3 is increased. The ceramic layer 3 and the aluminum-magnesium alloy inner core 1 are provided with a plurality of ventilation holes 33, and the ventilation holes penetrate through the ceramic layer 3 and the aluminum-magnesium alloy inner core 1. The vent holes 33 increase the contact area between the aluminum-magnesium alloy die casting and the air flow, enhance the cooling effect of the air flow on the aluminum-magnesium alloy die casting, and reduce the occurrence of the condition that the temperature of the aluminum-magnesium alloy die casting is too high.
The embodiment of the application also discloses a die casting method of the aluminum magnesium alloy die casting.
Referring to fig. 4-5, the aluminum magnesium alloy die casting method comprises the following steps:
s1, press forming: the alloy powder and the ceramic powder are pressed into a spoke compact 4 and a ceramic compact 5, respectively, using a press and a corresponding die. The ceramic pressed compact 5 is in a round cake shape, a containing cavity is arranged in the ceramic pressed compact 5, and a pouring through groove is formed in the middle of the ceramic pressed compact. The ceramic green compact 5 includes an annular upper green compact 51 and a lower green compact 52, outer circumferential edges of the upper green compact 51 and the lower green compact 52 are alternately arranged, and the upper green compact 51 and the lower green compact 52 can be engaged with each other. The ceramic green compact 5 is formed by buckling an upper green compact 51 and a lower green compact 52, so that the molding difficulty of the ceramic green compact 5 is reduced, a compression molding die is simplified, and the equipment cost of enterprises is reduced. Further, the vent hole 33, the scribe groove 32, and the bump 31 are all provided on the ceramic compact 5 by a press-formed die. The spoke compact 4 is provided with the tensile flange 41 near ceramic compact 5 middle part one end, and spoke compact 4 is provided with the butt board 42 far away from ceramic compact 5 middle part one end, and butt board 42 can be pressed from both sides tight by last compact 51 and lower compact 52, and butt board 42 is close to lower compact 52 one side rigid coupling has inserts 43, and inserts 43 can insert and locate lower compact 52. The vent hole 33, the scribing groove 32 and the lug 31 are integrally formed with the ceramic compact 5 and the aluminum magnesium alloy inner core 1 in the compression molding and alloy die casting processes, so that the workload of post machining is reduced, the production efficiency is improved, and the raw material loss is reduced. The spoke pressed compact 4 is inserted into the lower pressed compact 52, so that the stability of the relative positions of the spoke pressed compact 4 and the lower pressed compact 52 is improved, the probability of skewing of the spoke pressed compact 4 in the ceramic pressed compact 5 in the carrying and powder sintering processes is reduced, and the yield of products is improved.
S2, assembling a pressed blank: all the spoke green compacts 4 are placed on the lower green compact 52 in a radial array along the circumferential direction, and the insert blocks 43 are inserted into the lower green compact 52, so that the upper green compact 51 and the lower green compact 52 are engaged, and the abutting plate 42 is clamped at the same time of the engagement.
S3, powder sintering: the assembled spoke green compacts 4 and the ceramic green compacts 5 are sent into a hot isostatic pressing machine together for sintering, and the sintering process adopts a hot isostatic pressing method, so that the spokes 2 and the hollow ceramic layers 3 are manufactured in the step.
S4, steam treatment: the spoke 2 and the ceramic layer 3 which are manufactured by sintering are placed in a hot steam environment until the appearance and the pores of the spoke 2 and the ceramic layer 3 form a layer of fine oxide film.
S5, alloy die casting: the spoke 2 and the ceramic layer 3 assembly body after steam treatment are placed into a brake disc die for insert casting, an aluminum magnesium alloy is die-cast into an aluminum magnesium alloy inner core 1 by adopting a die-casting process, and the aluminum magnesium alloy inner core 1, the spoke 2 and the ceramic layer 3 are insert-cast into an integrated blank.
S6, machining: and cutting, drilling and polishing the blank to obtain the die casting.
S7, QC quality inspection: and (3) performing quality inspection on the die castings by using visual inspection, ultrasonic flaw detection and the like of workers, and enabling qualified die castings to enter stock.
The implementation principle of the embodiment of the application is as follows: the worker utilizes the press and corresponding mould to press alloy powder and ceramic powder into spoke pressed compact 4 and ceramic pressed compact 5 respectively, and vent hole 33, scribing groove 32 and lug 31 are integrally formed with ceramic pressed compact 5 and aluminum-magnesium alloy inner core 1 in the processes of press forming and alloy die casting, so that the workload of post machining is reduced. Compared with the machining forming, the pressing forming has the advantages of high production speed and high raw material utilization rate, and is convenient for mass production of enterprises. The spoke pressed compact 4 and the ceramic pressed compact 5 are sintered together after being assembled, so that the utilization rate of energy sources is improved, the production steps are simplified, meanwhile, the structural strength of the product is enhanced by a hot isostatic pressing method, and the die casting time is shortened.
The heat steam treated spoke 2 and ceramic layer 3 have enhanced corrosion resistance and wear resistance, and further strengthen the strength of the product. The aluminum magnesium alloy inner core 1, the spoke 2 and the ceramic layer 3 are embedded and cast into a whole, so that the connection strength among the aluminum magnesium alloy inner core 1, the spoke 2 and the ceramic layer 3 is improved, the assembly process among the three is simplified, and the production efficiency and the service performance of the product are improved.
According to the embodiment of the application, the situation that the abrasion resistance of the gray cast iron brake disc is poor is improved.
The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.
Claims (9)
1. The die casting method of the aluminum magnesium alloy die casting is characterized by comprising the following steps of:
s1, press forming: pressing the alloy powder and the ceramic powder into a spoke compact (4) and a ceramic compact (5) respectively by using a press and a corresponding die;
s2, assembling a pressed blank: assembling and combining the spoke pressed compact (4) and the ceramic pressed compact (5);
s3, powder sintering: feeding the spoke pressed compact (4) and the ceramic pressed compact (5) into a hot isostatic pressing machine for sintering, wherein the sintering process adopts a hot isostatic pressing method, and the steps are used for preparing the spoke (2) and the hollow ceramic layer (3);
s4, steam treatment: placing the spoke (2) and the ceramic layer (3) which are prepared by sintering in a hot steam environment until the appearance and the pores of the spoke (2) and the ceramic layer (3) form a layer of fine oxide film;
s5, alloy die casting: placing the assembly of the spoke (2) and the ceramic layer (3) after steam treatment into a brake disc die for insert casting, and adopting a die casting process to die-cast the aluminum-magnesium alloy into an aluminum-magnesium alloy inner core (1), wherein the aluminum-magnesium alloy inner core (1), the spoke (2) and the ceramic layer (3) are embedded and cast into an integrated blank;
s6, machining: cutting, drilling and polishing the blank to obtain a die casting;
s7, QC quality inspection: and (3) performing quality inspection on the die castings by using visual inspection, ultrasonic flaw detection and the like of workers, and enabling qualified die castings to enter stock.
2. The aluminum magnesium alloy die casting method as recited in claim 1, wherein: the vent hole (33), the scribing groove (32), the bump (31) are produced in the press molding, powder sintering and alloy die casting steps.
3. The aluminum magnesium alloy die casting method as recited in claim 1, wherein: the ceramic compact (5) comprises an upper compact (51) and a lower compact (52), and the upper compact (51) and the lower compact (52) can be mutually buckled.
4. A die casting method of an aluminum magnesium alloy die casting according to claim 3, wherein: the spoke compact (4) can be inserted into the lower compact (52).
5. An aluminum magnesium alloy die cast for automobile parts produced by the die casting method as claimed in any one of claims 1 to 4, comprising:
the aluminum magnesium alloy inner core (1) is arranged in a round cake shape, and the middle part of the aluminum magnesium alloy inner core is provided with a mounting hole;
the ceramic layer (3) is covered on the outer surface of the aluminum magnesium alloy inner core (1);
and the spokes (2) are arranged in the aluminum magnesium alloy.
6. An aluminum magnesium alloy die casting for automobile parts according to claim 5, wherein: a plurality of protruding blocks (31) are arranged on one side of the ceramic layer (3) corresponding to the aluminum magnesium alloy inner core (1), and the protruding blocks (31) are embedded in the aluminum magnesium alloy inner core (1).
7. An aluminum magnesium alloy die casting for automobile parts according to claim 5, wherein: a plurality of ventilation holes (33) are formed in the ceramic layer (3) and the aluminum-magnesium alloy inner core (1), and the ventilation holes penetrate through the ceramic layer (3) and the aluminum-magnesium alloy inner core (1).
8. An aluminum magnesium alloy die casting for automobile parts according to claim 5, wherein: a plurality of scribing grooves (32) are formed in the outer surface of the ceramic layer (3).
9. An aluminum magnesium alloy die casting for automobile parts according to claim 5, wherein: the aluminum magnesium alloy inner core (1) is manufactured by adopting a die casting process, the melting point of the selected aluminum magnesium alloy is more than 500 ℃, the ceramic layer (3) is made of wear-resistant ceramic, and the ceramic layer (3) and the spoke (2) are manufactured by adopting powder sintering.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210799276.5A CN115163704B (en) | 2022-07-08 | 2022-07-08 | Aluminum magnesium alloy die casting for automobile parts and die casting method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210799276.5A CN115163704B (en) | 2022-07-08 | 2022-07-08 | Aluminum magnesium alloy die casting for automobile parts and die casting method thereof |
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| CN115163704A CN115163704A (en) | 2022-10-11 |
| CN115163704B true CN115163704B (en) | 2023-12-22 |
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| CN107202085A (en) * | 2017-07-24 | 2017-09-26 | 黄志豪 | A kind of automobile wear-resistant brake disc and preparation method thereof |
| CN109210109A (en) * | 2017-06-30 | 2019-01-15 | 秦文隆 | Power car brake disc and preparation method thereof |
| CN111503185A (en) * | 2020-05-18 | 2020-08-07 | 保定立中东安轻合金部件制造有限公司 | Aluminum-iron composite brake disc and manufacturing method thereof |
| CN214945930U (en) * | 2021-04-25 | 2021-11-30 | 浙江耐磨达科技有限公司 | Automobile brake disc capable of dissipating heat quickly |
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| US20210094094A1 (en) * | 2017-06-06 | 2021-04-01 | Grouper Casting, Llc | Composite part and method and tooling for making the same |
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| CN109210109A (en) * | 2017-06-30 | 2019-01-15 | 秦文隆 | Power car brake disc and preparation method thereof |
| CN107202085A (en) * | 2017-07-24 | 2017-09-26 | 黄志豪 | A kind of automobile wear-resistant brake disc and preparation method thereof |
| CN111503185A (en) * | 2020-05-18 | 2020-08-07 | 保定立中东安轻合金部件制造有限公司 | Aluminum-iron composite brake disc and manufacturing method thereof |
| CN214945930U (en) * | 2021-04-25 | 2021-11-30 | 浙江耐磨达科技有限公司 | Automobile brake disc capable of dissipating heat quickly |
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