CN105772688A - Automobile mold casting compositely casted through Cr12 type steel and gray iron, pouring system and casting method - Google Patents
Automobile mold casting compositely casted through Cr12 type steel and gray iron, pouring system and casting method Download PDFInfo
- Publication number
- CN105772688A CN105772688A CN201610257738.5A CN201610257738A CN105772688A CN 105772688 A CN105772688 A CN 105772688A CN 201610257738 A CN201610257738 A CN 201610257738A CN 105772688 A CN105772688 A CN 105772688A
- Authority
- CN
- China
- Prior art keywords
- shaped steel
- casting
- cast
- liquid
- casting mold
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- B22D19/16—Casting in, on, or around objects which form part of the product for making compound objects cast of two or more different metals, e.g. for making rolls for rolling mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
- B22C9/082—Sprues, pouring cups
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
- B22C9/088—Feeder heads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/12—Treating moulds or cores, e.g. drying, hardening
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
Abstract
The invention relates to an automobile mold casting compositely casted through Cr12 type steel and gray iron, a pouring system and a casting method. The automobile mold casting comprises a mold base and a working portion which are formed through one-time casting. The mold base is made of the gray iron. The working portion is made of the Cr12 type steel. The bonding surface of the mold base and the working portion is formed through metallurgical bonding. Thus, the mold base and the working portion are integrally casted and formed at a time, and the casting production time is saved; meanwhile, due to the fact that the machining benchmark of molds is basically the same, the machining workload is substantially reduced, the machining precision is improved substantially, the machining time is shortened obviously, and the machining cost is reduced; and the difficulty of mold assembling and debugging for a fitter is reduced, and the time of mold assembling and debugging for the fitter is shortened. In addition, the bonding surface of the mold base and the working portion is formed through metallurgical bonding and is good in technology performance and high in bonding strength, and thus the problem of cracking of the bonding surface is solved.
Description
Technical field
The invention belongs to automobile die casting field, be specially a kind of Cr12 shaped steel and the automobile die cast of gray iron composite casting, running gate system and casting method.
Background technology
Automobile die has been that auto parts and components shape, it is achieved the critical equipment of auto output, in the exploitation of automobile, is responsible for important responsibility in the remodeling of automobile.A brand-new vehicle takes around 350-400 and overlaps car panel die, overbalances one hundred million.And a remodeling car on average there are about the car panel die of 25% and needs to change, the mould of replacing be worth also reach tens million of.Ge great automobile production producer all using the cycle improving automobile listing as one of Important Action improving competitiveness, thus the renewal time and quality to car panel die propose requirements at the higher level.Existing automobile die production method, is mould is divided into die holder and working portion, again working portion is divided into multiple insert, to die holder and the cast form respectively of multiple insert.Working portion is generally with bolts with pedestal connected mode, but owing to the contact surface between working portion and pedestal is very big, machining accuracy requires height, and workman is before debugging mould, adopt bolt that working portion and pedestal couple together trouble, carrying and management trouble.
Running gate system is the passage that casting liquid enters die cavity, rational injection system structure is for ensureing that casting quality plays critically important effect, running gate system and molten metal fluidised form, the discharges of type intracavity gas etc. are closely related, and filling speed, filling time, die cavity temperature etc. can be filled type condition and play regulatory role, but irrational running gate system can cause the defects such as pore, shrinkage cavity shrinkage porosity, cold shut and poor surface smoothness.
The feature of bimetallic compound casting is, by the mode of production of casting, two kinds of different metals are formed firmly metallurgical binding, has a foundry goods have two kinds of metallicity compound casting blanks or part simultaneously thus casting out.
In the process of biliquid composite casting, two kinds of casting liquid can not rush mixed, the mixed purity that can reduce high-rigidity cast liquid material of punching, thus reducing the mechanical performance of work package, cold shut, oxide inclusion defect can not occurs in two kinds of melts combine faces again.But, traditional biliquid composite casting method is all adopt two single apparatus for pouring superpositions to realize biliquid composite casting molding, it is easy to causes that two kinds of casting liquid punchings mix or cold shut, oxide inclusion defect, affects the quality of biliquid compound casting.
Summary of the invention
The technical problem to be solved in the present invention is: provide the automobile die cast of a kind of Cr12 shaped steel and gray iron composite casting, it can avoid two kinds of molten metal punchings mixed in the process of automobile die cast casting, improves the quality of Cr12 shaped steel and the automobile die cast of gray iron composite casting.
Another that the invention solves the problems that technical problem is that: provides a kind of running gate system casting automobile die cast, and it can avoid two kinds of molten metal punchings mixed in the process of casting automobile die cast, improves the castability of automobile die cast.
What the invention solves the problems that another technical problem is that: provide the casting method of a kind of automobile die cast, and it can avoid two kinds of molten metals punchings mixed in the process of casting automobile die cast, improves the castability of automobile die cast.
In order to solve above-mentioned first technical problem, the present invention provides the automobile die cast of a kind of Cr12 shaped steel and gray iron composite casting, it die holder including disposable casting and working portion, the material of described die holder is gray iron, the material of described working portion is Cr12 shaped steel, and the faying face of described die holder and working portion is metallurgical binding.So, described automobile die cast adopts the method for bimetal composite casting, by disposable to die holder and working portion overall cast form, has saved the Foundry Production time；And due to die holder and the disposable monolithic molding of working portion, molding machine machining benchmark is basically identical, workload is greatly reduced, machining accuracy increases substantially in machining, hence it is evident that shortens machining time, reduces machining cost.Further, since the material of described die holder is gray iron, the material of described working portion is Cr12 shaped steel, and difficulty and the time of such fitter assembly debugging mould are greatly shortened.And, the combination interface of described die holder and working portion is metallurgical binding, and between combination interface, gray iron and Cr12 shaped steel atom diffuse to form faying face mutually, so, faying face has good processing performance, and bond strength is high, thus the problem avoiding faying face cracking.
In order to solve above-mentioned second technical problem, the present invention provides a kind of running gate system casting automobile die cast, including Cr12 shaped steel apparatus for pouring and gray iron apparatus for pouring, described Cr12 shaped steel apparatus for pouring is connected with the bottom of casting mold, described gray iron apparatus for pouring is connected with the top of casting mold, is provided with overfall between bottom and the top of described casting mold.So, in the process of bimetal composite casting, first pass through Cr12 shaped steel apparatus for pouring cast Cr12 shaped steel liquid, Cr12 shaped steel liquid is poured into the bottom of casting mold, owing to being provided with overfall between bottom and the top of casting mold, when Cr12 shaped steel liquid is poured into overfall position, unnecessary Cr12 shaped steel liquid is allowed to discharge casting mold inner chamber, thus controlling the liquid level of required Cr12 shaped steel liquid, and the liquid level being made Cr12 shaped steel liquid by the abundant overflow of overfall is pure, again overfall is blocked, by gray iron apparatus for pouring, gray iron liquid is poured into the top of casting mold, thus described Cr12 shaped steel liquid and gray iron liquid form metallurgical binding face at overfall place, and Cr12 shaped steel liquid and gray iron liquid do not interfere with each other in casting process, do not rush mixed, therefore the quality of bimetallic compound casting is improved.Further, overfall can be arranged on the opposite of described Cr12 shaped steel apparatus for pouring, such Cr12 shaped steel apparatus for pouring is Open architecture, adopt in the process of Cr12 shaped steel apparatus for pouring cast Cr12 shaped steel liquid, the mobility of Cr12 shaped steel liquid can be more steady, Cr12 shaped steel liquid can also be reduced oxidized simultaneously, be more favorable to, by overfall, unnecessary Cr12 shaped steel liquid is discharged casting mold inner chamber.
Another technical scheme of the present invention is in that on above-mentioned basis, and described casting mold is the foam mold of preset shape and size.
Another technical scheme of the present invention is in that, on above-mentioned basis, the bottom of described casting mold to be provided with chiller.
Another technical scheme of the present invention is in that on above-mentioned basis, and described chiller is the external chill of the lower outside being arranged on described casting mold.
Another technical scheme of the present invention is in that, on above-mentioned basis, the top of described casting mold is provided with aerofluxus rising head.
Another technical scheme of the present invention is in that on above-mentioned basis, and described aerofluxus rising head is provided with multiple, and uniformly, interval be arranged in the top of described casting mold.
Another technical scheme of the present invention is in that on above-mentioned basis, and described foam mold is painted with coating, and the thickness of described coating is 1.5～2.5mm.
Another technical scheme of the present invention is in that on above-mentioned basis, described Cr12 shaped steel apparatus for pouring includes the first sprue, the first cross gate and the first ingate, and described first sprue, the first cross gate and the first ingate section area ratio are 1:1.1～1.3:1.4～1.8；And/or described gray iron apparatus for pouring includes the second sprue, the second cross gate, the 3rd cross gate and the second ingate, the section area ratio of described second sprue, the second cross gate, the 3rd cross gate and the second ingate is 1:1.1～1.3:1.3～1.5:1.5～2.
Another technical scheme of the present invention is in that on above-mentioned basis, first sprue and/or the second sprue are pottery depositing, described first cross gate, the second cross gate and/or the 3rd cross gate are foam running channel, and described first ingate and/or the second ingate are foam running channel.
Another technical scheme of the present invention is in that on above-mentioned basis, the top 500mm more than higher than the top of casting mold of described second sprue.As such, it is possible to utilize the gravity of gray iron liquid that bimetallic compound casting carries out feeding, reduce feeding cost, improve production efficiency.
In order to solve above-mentioned 3rd technical problem, the present invention provides the casting method of a kind of automobile die cast, it is characterised in that comprise the following steps: prepare casting mold, according to shape and the size of automobile die, prepare to comprise the foam mold casting mold mated with automobile die shape and size；Cast Cr12 shaped steel liquid, by running gate system, Cr12 shaped steel liquid is poured into the bottom of casting mold, between bottom and the top of casting mold of casting mold, is provided with overfall, treat that Cr12 shaped steel liquid was from overfall overflow 5～15 seconds, stop cast Cr12 shaped steel liquid, and overfall is blocked；Cast gray iron liquid, is poured into the top of casting mold by running gate system by gray iron liquid；Described automobile die cast is obtained after cooled and solidified.So, in the casting process of automobile die cast, first pass through running gate system and Cr12 shaped steel liquid is poured into the bottom of casting mold, owing to being provided with overfall between bottom and the top of casting mold, when Cr12 shaped steel liquid is poured into overfall position, unnecessary Cr12 shaped steel liquid is allowed to discharge casting mold inner chamber, thus controlling the liquid level of required Cr12 shaped steel liquid, and until Cr12 shaped steel liquid from after overfall overflow 5～15 seconds, the liquid level being made Cr12 shaped steel liquid by the abundant overflow of overfall is pure, again overfall is blocked, again through running gate system, gray iron liquid is poured into the top of casting mold, the automobile die cast of Cr12 shaped steel and gray iron composite casting is obtained after cooled and solidified.Thus the combination interface place of described die holder and working portion forms metallurgical binding face, and Cr12 shaped steel liquid and gray iron liquid do not interfere with each other in casting process, do not rush mixed, therefore improve the quality of the automobile die cast of Cr12 shaped steel and gray iron composite casting.
Another technical scheme of the present invention is in that on above-mentioned basis, in described cast Cr12 shaped steel liquid step, when described Cr12 shaped steel liquid is near overfall position, reduces the poring rate of Cr12 shaped steel liquid.
Another technical scheme of the present invention is in that on above-mentioned basis, described cast Cr12 shaped steel liquid step in, when overfall start overflow go out Cr12 shaped steel liquid time, abundant overflow 5～15 seconds.
Another technical scheme of the present invention is in that on above-mentioned basis, in described cast Cr12 shaped steel liquid step, when described Cr12 shaped steel liquid is near overfall position, the spillway discharge of Cr12 shaped steel liquid is measured by balance magnetometer, when spillway discharge is 200～300kg, stop cast Cr12 shaped steel liquid, and overfall is blocked.
Another technical scheme of the present invention is in that on above-mentioned basis, between described cast Cr12 shaped steel liquid step and cast gray iron liquid step, and 60～120 seconds, interval.
Another technical scheme of the present invention is in that on above-mentioned basis, also includes adding antioxidant step, add anti-oxidation rare earth composite fluxing agent in Cr12 shaped steel liquid in described cast Cr12 shaped steel liquid step.
Another technical scheme of the present invention is in that on above-mentioned basis, and the pouring temperature of described Cr12 shaped steel liquid is 1540～1580 DEG C, and the pouring temperature of described gray iron liquid is 1370～1410 DEG C.
Another technical scheme of the present invention is in that on above-mentioned basis, described preparation casting mold step also includes brushing paint step, cast steel position brush steel moulder's paint at described bubbles model, cast iron position brush iron casting coating at described foam type, brush 2～4 times coating, often painting carries out the brushing of next time again after brushing one times and drying, and paint coatings gross thickness is 1.5～2.5mm.
Accompanying drawing explanation
Fig. 1 is the structure chart representing the Cr12 shaped steel involved by a kind of embodiment of this patent with the automobile die cast of gray iron composite casting；
Fig. 2 is the structure chart of the running gate system representing the casting automobile die cast involved by a kind of embodiment of this patent；
Fig. 3 is the axonometric chart of running gate system shown in Fig. 2；
Fig. 4 is the flow chart representing the casting method involved by a kind of embodiment of this patent；
In figure:
1Cr12 shaped steel apparatus for pouring 2 gray iron apparatus for pouring
3 casting mold 4 overfalls
5 external chill 6 aerofluxus rising head 11 first sprues
12 first cross gate 13 first ingate 21 second sprues
22 second cross gate 23 second ingate 24 the 3rd cross gates
Detailed description of the invention
Describing the present invention below in conjunction with accompanying drawing, the description of this part is only exemplary and explanatory, and protection scope of the present invention should not have any restriction effect.Additionally, the description that those skilled in the art are according to presents, it is possible to the feature in embodiment in presents and in different embodiment is carried out respective combination.
The embodiment of the present invention is as follows; refer to Fig. 1; for representing the automobile die cast of a kind of Cr12 shaped steel involved by a kind of embodiment of this patent and gray iron composite casting; preferably; described automobile die cast is preferably drawing die or curring and sizing die or trimming and piercing die, it die holder including disposable casting and working portion, and the material of described die holder is gray iron; the material of described working portion is Cr12 shaped steel, and the faying face of described die holder and working portion is metallurgical binding.So; described automobile die cast adopts the method for bimetal composite casting; by disposable to die holder and working portion overall cast form; mould (is divided into HT300 die holder and Cr12 shaped steel punch or insert casting respectively by relatively existing automobile die cast production method; again respectively to punch or insert and die holder equipment face processing bedding-in; bolt is used punch or insert and die holder to be fitted together), save the Foundry Production time；And due to die holder and the disposable monolithic molding of working portion, molding machine machining benchmark is basically identical, workload is greatly reduced, machining accuracy increases substantially in machining, hence it is evident that shortens machining time, reduces machining cost.It addition, the material of described die holder is gray iron, the material of described working portion is Cr12 shaped steel, and difficulty and the time of such fitter assembly debugging mould are greatly shortened.And, the combination interface of described die holder and working portion is metallurgical binding, and between combination interface, gray iron and Cr12 shaped steel atom diffuse to form faying face mutually, so, faying face has good processing performance, and bond strength is high, thus the problem avoiding faying face cracking.Cr12 shaped steel mainly includes the shaped steel such as Cr12, Cr12Mo, Cr12MoV, Cr12V, belong to high-carbon chromium steel, it is mainly used to manufacture cold punching die, preferred Cr12MoV or SKD11 of this patent, wherein, Cr12MoV is cold work die steel, and the quenching degree of steel, the hardness of Q-tempering, wearability, intensity are all high than Cr12.Cross section is bigger, complex-shaped, workload is heavier conjunction kind mould and instrument can be made, such as punching concave die, edger, rolling mould, steel plate deep drawn mould, annular saw, conventional tool and gauge, thread rolling die etc., China GB standard brand: Cr12MoV, moral mark is called: X165CrMoV12.SKD11 is the general cold work die steel of high abrasion toughness, high carbon high chromium alloy tool steel and vacuum deaeration refining steel, and steel is pure, has the good hardenability that quenching degree is good, quenching distortion amount is little.This steel is through spheroidizing sofening treatment, and machinability is good, carbide particle fine uniform, need not worry hardening break intensified element molybdenum, vanadium hold different addition.There are production SKD11 in Hitachi and steel mill of Datong District, and Hitachi produces SKD11 commodity SLD (up-to-date improvement version is called SLD-MAGIC) by name, and steel mill of Datong District commodity are called DC11.Gray iron refers to the cast iron with flake graphite, and during because of fracture, fracture is lead, therefore also referred to as casting pig.Main component is ferrum, carbon, silicon, manganese, sulfur, phosphorus, is most widely used cast iron.Casting pig HT300 is the casting pig of pearlite type.Wherein, Cr12 shaped steel and casting pig are all known materials, it is possible to obtained by already known processes smelting processing manufacture.
On the basis of above-described embodiment, in another embodiment of the present invention, refer to Fig. 2 and Fig. 3, a kind of running gate system casting automobile die cast is provided, including Cr12 shaped steel apparatus for pouring 1 and gray iron apparatus for pouring 2, described Cr12 shaped steel apparatus for pouring 1 is connected with the bottom of casting mold 3, and described gray iron apparatus for pouring 2 is connected with the top of casting mold 3, being provided with overfall 4 between bottom and the top of described casting mold 3, described Cr12 shaped steel apparatus for pouring 1 and gray iron apparatus for pouring 2 are relatively arranged on the both sides of casting mold 3.nullSo，In the process of bimetal composite casting，First pass through Cr12 shaped steel apparatus for pouring 1 and pour into a mould Cr12 shaped steel liquid，Cr12 shaped steel liquid is poured into the bottom of casting mold 3，Owing to being provided with overfall 4 between bottom and the top of casting mold 3，When Cr12 shaped steel liquid is poured into overfall 4 position，Unnecessary Cr12 shaped steel liquid is allowed to discharge casting mold 3 inner chamber，Thus controlling the liquid level of required Cr12 shaped steel liquid，And the liquid level making Cr12 shaped steel liquid by the abundant overflow of overfall 4 is pure，Again overfall 4 is blocked，By gray iron apparatus for pouring 2, gray iron liquid is poured into the top of casting mold 3，Thus described Cr12 shaped steel liquid and gray iron liquid form metallurgical binding face at overfall 4 place，And Cr12 shaped steel liquid and gray iron liquid do not interfere with each other in casting process、Do not rush mixed，Therefore the quality of bimetallic compound casting is improved.Described Cr12 shaped steel apparatus for pouring 1 and gray iron apparatus for pouring 2 are relatively arranged on the both sides of casting mold 3, so make bimetal composite casting running gate system entirety be arranged symmetrically, take up room relatively small, are also convenient for the cast of Cr12 shaped steel liquid and gray iron liquid simultaneously.Preferably, overfall 4 can be arranged on the opposite of described Cr12 shaped steel apparatus for pouring 1, such Cr12 shaped steel apparatus for pouring is Open architecture, adopt in the process of Cr12 shaped steel apparatus for pouring cast Cr12 shaped steel liquid, the mobility of Cr12 shaped steel liquid can be more steady, Cr12 shaped steel liquid can also be reduced oxidized simultaneously, be more favorable to, by overfall, unnecessary Cr12 shaped steel liquid is discharged casting mold inner chamber.
On the basis of above-described embodiment, in another embodiment of the present invention, described casting mold 3 can adopt foam molding, phenolic sand molding.Can being arranged as required to the structure such as gusset, fillet in foam mold, described foam mold can adopt resin sand cast form.
On the basis of above-described embodiment, in another embodiment of the present invention, chiller can be provided with in the bottom of described casting mold 3.So, the Cr12 shaped steel liquid in the bottom being poured into casting mold can be carried out extremely cold by described chiller so that the dense structure of Cr12 shaped steel liquid, without shrinkage porosite.
On the basis of above-described embodiment, in another embodiment of the present invention, described chiller can be the external chill 5 of the lower outside being arranged on described casting mold 3.So, molten steel is had chill effect by external chill, thus ensureing that the key position dense structure of cast steel cutting edge is without shrinkage defect, the modulus of external chill is 1.2～1.5 times of cast steel cutting edge position modulus, and external chill and cast steel cutting edge position are 10～20mm across the thickness of molding sand.
On the basis of above-described embodiment, in another embodiment of the present invention, as shown in Figures 2 and 3, the top of described casting mold 3 can be provided with aerofluxus rising head 6.So, the top of described casting mold is provided with aerofluxus rising head, except the effect of the excessive slag of aerofluxus can be played；Feeding effect can also be played.
On the basis of above-described embodiment, in another embodiment of the present invention, described aerofluxus rising head 6 can be provided with multiple, and uniformly, interval be arranged in the top of described casting mold 3.
On the basis of above-described embodiment, in another embodiment of the present invention, described foam mold can being painted with coating, the thickness of described coating is 1.5～2.5mm.
On the basis of above-described embodiment, in another embodiment of the present invention, as shown in Figure 2, described Cr12 shaped steel apparatus for pouring 1 can include the first sprue the 11, first cross gate 12 and the first ingate 13, and the section area ratio of described first sprue the 11, first cross gate 12 and the first ingate 13 is 1:1.1～1.3:1.4～1.8；And/or described gray iron apparatus for pouring 2 can include the second sprue the 21, second cross gate the 22, the 3rd cross gate 24 and the second ingate 23, the section area ratio of described second sprue the 21, second cross gate the 22, the 3rd cross gate 24 and the second ingate 23 is 1:1.1～1.3:1.3～1.5:1.5～2.So, it is possible not only to improve the flowing stationarity of Cr12 shaped steel liquid and/or gray iron liquid, but also Cr12 shaped steel liquid can be reduced and/or gray iron liquid is oxidized.Preferably, the sectional area of described second ingate 23 and sectional area ratio 1:0.8～1.2 of described aerofluxus rising head 6, so, when gray iron apparatus for pouring is toward cast gray iron liquid in casting mold, casting mold type intracavity gas can be discharged from aerofluxus rising head happyly, thus avoiding metal casting to produce the phenomenon such as pore, shrinkage cavity shrinkage porosity.
On the basis of above-described embodiment, in another embodiment of the present invention, described first sprue 11 and/or the second sprue 21 are pottery depositing, described first cross gate the 12, second cross gate 22 and/or the 3rd cross gate 24 are foam running channel, and described first ingate 13 and/or the second ingate 13 are foam running channel.Preferably, the ingate of described first ingate 13 can be arranged on the interfacial lower section of bimetallic compound casting, but can not be arranged on the work surface of bimetallic compound casting, so, the work surface component segregation of bimetallic compound casting, the problem that quenching hardness is inadequate can be avoided.
On the basis of above-described embodiment, in another embodiment of the present invention, the top 500mm more than higher than the top of casting mold of described second sprue 21.As such, it is possible to utilize the gravity of gray iron liquid that bimetallic compound casting is carried out feeding, thus reducing the cost of feeding, improve production efficiency.
On the basis of above-described embodiment, in another embodiment of the present invention, as shown in Figure 4, a kind of casting method of automobile die cast, comprise the following steps: prepare casting mold, according to shape and the size of automobile die, prepare to comprise the foam mold casting mold mated with automobile die shape and size；Melting first casts liquid and the second casting liquid, and described first casting liquid is Cr12 shaped steel liquid, and described second casting liquid is gray iron liquid；Cast the first casting liquid, cast liquid by running gate system by first and be poured into the bottom of casting mold, between bottom and the top of casting mold of casting mold, be provided with overfall, treat that the first casting liquid was from overfall overflow 5～15 seconds, stop cast the first casting liquid, and overfall is blocked；Cast the second casting liquid, casts liquid by running gate system by second and is poured into the top of casting mold；The automobile die cast of biliquid composite casting is obtained after cooled and solidified.So, in the casting process of automobile die cast, first pass through running gate system and Cr12 shaped steel liquid is poured into the bottom of casting mold, owing to being provided with overfall between bottom and the top of casting mold, when Cr12 shaped steel liquid is poured into overfall position, unnecessary Cr12 shaped steel liquid is allowed to discharge casting mold inner chamber, thus controlling the liquid level of required Cr12 shaped steel liquid, and until Cr12 shaped steel liquid from after overfall overflow 5～15 seconds, the liquid level being made Cr12 shaped steel liquid by the abundant overflow of overfall is pure, again overfall is blocked, again through running gate system, gray iron liquid is poured into the top of casting mold, the automobile die cast of Cr12 shaped steel and gray iron composite casting is obtained after cooled and solidified.Thus the combination interface place of described die holder and working portion forms metallurgical binding face, and Cr12 shaped steel liquid and gray iron liquid do not interfere with each other in casting process, do not rush mixed, therefore improve the quality of the automobile die cast of Cr12 shaped steel and gray iron composite casting.
On the basis of above-described embodiment, in another embodiment of the present invention, in described cast Cr12 shaped steel liquid step, when described Cr12 shaped steel liquid is near overfall position, reduce the poring rate of Cr12 shaped steel liquid.As such, it is possible to improve the stationarity of Cr12 type molten steel flow so that the faying face of Cr12 shaped steel liquid and gray iron liquid is a plane as far as possible.
On the basis of above-described embodiment, in another embodiment of the present invention, in described cast Cr12 shaped steel liquid step, when described Cr12 shaped steel liquid starts from overfall overflow, abundant overflow 5～15 seconds, can discharge the oxide slag inclusion on Cr12 shaped steel liquid top layer, faying face can be made again smooth.
On the basis of above-described embodiment, in another embodiment of the present invention, in described cast Cr12 shaped steel liquid step, when described Cr12 shaped steel liquid is near overfall position, the spillway discharge of Cr12 shaped steel liquid is measured by balance magnetometer, when spillway discharge is 200～300kg, stops cast Cr12 shaped steel liquid, and overfall is blocked.As such, it is possible to by the method for balance magnetometer and overfall dual fail-safe, solve the quantitative pouring problem of Cr12 shaped steel liquid, improve accuracy and the safety of cast casting liquid.
On the basis of above-described embodiment, in another embodiment of the present invention, between described cast Cr12 shaped steel liquid step and cast gray iron liquid step, it is possible to according to the pouring temperature of Cr12 shaped steel and weight, 60～120 seconds, interval.So, Cr12 shaped steel liquid is through of short duration cooling, it is in half curdled appearance, pour into a mould gray iron liquid again, two kinds of metals of Cr12 shaped steel liquid and gray iron liquid are not rushed not only mixed but also can together with strong bonded, and in the faying face formation metallurgical binding of Cr12 shaped steel liquid with gray iron liquid, improve processing performance and the bond strength of faying face, thus avoiding the problem that cracking occurs faying face.
On the basis of above-described embodiment, in another embodiment of the present invention, also include adding antioxidant step in described cast Cr12 shaped steel liquid step, in Cr12 shaped steel liquid, add anti-oxidation rare earth composite fluxing agent.As such, it is possible to the faying face reducing Cr12 shaped steel liquid and gray iron liquid has oxide-film inclusion defect, form metallurgical binding at combination interface, it is to avoid the problem of the easy delamination splitting of faying face of biliquid composite casting automobile die cast.
On the basis of above-described embodiment, in another embodiment of the present invention, as shown in Figure 4, it is possible to adopt two intermediate frequency furnace meltings respectively first to cast liquid, i.e. Cr12 shaped steel liquid, and melting second casts liquid, i.e. gray iron liquid, and liquid is melting down to be taken off slag totally by casting.During cast, the pouring temperature of described first casting liquid is 1540～1580 DEG C, and the pouring temperature of described second casting liquid is 1370～1410 DEG C.As such, it is possible to improve the metallurgical quality of biliquid as far as possible, reduce automobile die cast and produce the probability of the defect such as slag inclusion, pore, it is ensured that automobile die cast is fine and close, without defects such as obvious shrinkage cavity and porosities.
On the basis of above-described embodiment, in another embodiment of the present invention, described preparation casting mold step also includes brushing paint step, cast steel position brush steel moulder's paint at described bubbles model, cast iron position brush iron casting coating at described foam type, brushing 2～4 times coating, often painting carries out the brushing of next time again after brushing one times and drying, and paint coatings gross thickness is 1.5～2.5mm.
The above is only the preferred embodiment of the present invention; it should be pointed out that, for those skilled in the art, under the premise without departing from the principles of the invention; can also making some improvements and modifications, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (10)
1. the automobile die cast of a Cr12 shaped steel and gray iron composite casting, it is characterized in that, described automobile die cast includes die holder and the working portion of disposable casting, the material of described die holder is gray iron, the material of described working portion is Cr12 shaped steel, and the faying face of described die holder and working portion is metallurgical binding.
2. the running gate system casting automobile die cast, it is characterized in that, including Cr12 shaped steel apparatus for pouring and gray iron apparatus for pouring, described Cr12 shaped steel apparatus for pouring is connected with the bottom of casting mold, described gray iron apparatus for pouring is connected with the top of casting mold, being provided with overfall between bottom and the top of described casting mold, described Cr12 shaped steel apparatus for pouring and gray iron apparatus for pouring are relatively arranged on the both sides of casting mold.
3. running gate system according to claim 2, it is characterised in that described casting mold is the foam mold of preset shape and size.
4. running gate system according to claim 2, it is characterised in that the bottom of described casting mold is provided with chiller；Or, described chiller is the external chill of the lower outside being arranged on described casting mold.
5. running gate system according to claim 2, it is characterised in that the top of described casting mold is provided with aerofluxus rising head；Or, described aerofluxus rising head is provided with multiple, and uniformly, interval be arranged in the top of described casting mold.
6. running gate system according to claim 3, it is characterised in that be painted with coating in described foam mold, the thickness of described coating is 1.5～2.5mm.
7. according to described running gate system arbitrary in claim 2 to 6, it is characterized in that, described Cr12 shaped steel apparatus for pouring includes the first sprue, the first cross gate and the first ingate, and described first sprue, the first cross gate and the first ingate section area ratio are 1:1.1～1.3:1.4～1.8；And/or described gray iron apparatus for pouring includes the second sprue, the second cross gate, the 3rd cross gate and the second ingate, the section area ratio of described second sprue, the second cross gate, the 3rd cross gate and the second ingate is 1:1.1～1.3:1.3～1.5:1.5～2.
8. running gate system according to claim 7, it is characterized in that, described first sprue and/or the second sprue are pottery depositing, and described first cross gate, the second cross gate and/or the 3rd cross gate are foam running channel, and described first ingate and/or the second ingate are foam running channel；Or the top 500mm more than higher than the top of casting mold of described second sprue.
9. the casting method of an automobile die cast, it is characterised in that comprise the following steps:
Prepare casting mold, according to shape and the size of automobile die, prepare to comprise the foam mold casting mold mated with automobile die shape and size；
Cast Cr12 shaped steel liquid, by running gate system, Cr12 shaped steel liquid is poured into the bottom of casting mold, between bottom and the top of casting mold of casting mold, is provided with overfall, treat that Cr12 shaped steel liquid was from overfall overflow 5～15 seconds, stop cast Cr12 shaped steel liquid, and overfall is blocked；
Cast gray iron liquid, is poured into the top of casting mold by running gate system by gray iron liquid；
Described automobile die cast is obtained after cooled and solidified.
10. casting method according to claim 9, it is characterised in that in described cast Cr12 shaped steel liquid step, when described Cr12 shaped steel liquid is near overfall position, reduce the poring rate of Cr12 shaped steel liquid；Or, described cast Cr12 shaped steel liquid step in, when overfall start overflow go out Cr12 shaped steel liquid time, abundant overflow 5～15 seconds；Or, between described cast Cr12 shaped steel liquid step and cast gray iron liquid step, 60～120 seconds, interval；Or, also include adding antioxidant step in described cast Cr12 shaped steel liquid step, in Cr12 shaped steel liquid, add anti-oxidation rare earth double solvents；Or, the pouring temperature of described Cr12 shaped steel liquid is 1540～1580 DEG C, and the pouring temperature of described gray iron liquid is 1370～1410 DEG C；Or, described preparation casting mold step also includes brushing paint step, cast steel position brush steel moulder's paint at described bubbles model, cast iron position brush iron casting coating at described foam type, brush 2～4 times coating, often painting carries out the brushing of next time again after brushing one times and drying, and paint coatings gross thickness is 1.5～2.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610257738.5A CN105772688A (en) | 2016-04-22 | 2016-04-22 | Automobile mold casting compositely casted through Cr12 type steel and gray iron, pouring system and casting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610257738.5A CN105772688A (en) | 2016-04-22 | 2016-04-22 | Automobile mold casting compositely casted through Cr12 type steel and gray iron, pouring system and casting method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105772688A true CN105772688A (en) | 2016-07-20 |
Family
ID=56398414
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610257738.5A Pending CN105772688A (en) | 2016-04-22 | 2016-04-22 | Automobile mold casting compositely casted through Cr12 type steel and gray iron, pouring system and casting method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105772688A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107866547A (en) * | 2016-09-23 | 2018-04-03 | 长城汽车股份有限公司 | The casting system of embedded mould |
| CN107866528A (en) * | 2016-09-23 | 2018-04-03 | 长城汽车股份有限公司 | The casting technique of diel |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1984004760A1 (en) * | 1983-05-30 | 1984-12-06 | Vickers Australia Ltd | Tough, wear- and abrasion-resistant, high chromium hypereutectic white iron |
| CN1962122A (en) * | 2005-11-11 | 2007-05-16 | 郭继伟 | Process for manufacturing bimetal compound casting liner plate |
| CN101239381A (en) * | 2007-02-05 | 2008-08-13 | 荣守范 | Production technique method of double-liquid bimetal composite casting hammer type hammerhead |
| CN102019403A (en) * | 2011-01-05 | 2011-04-20 | 武汉智科耐磨材料科技发展有限公司 | Technique for producing dual-liquid dual-metal composite wear-resistant lining plate by lost foam casting |
| CN102327794A (en) * | 2011-08-05 | 2012-01-25 | 昆明理工大学 | Cr-free high boron iron-based wear-resisting dual-liquid dual-metal compound hammerhead and manufacturing method thereof |
| CN102847880A (en) * | 2012-09-07 | 2013-01-02 | 杨邦树 | Special material co-casting cast mold and special material co-casting cast production process |
| CN102921927A (en) * | 2012-11-15 | 2013-02-13 | 北京工业大学 | Preparation method of double-liquid bimetal composite wear-resistant lining board |
| CN203091679U (en) * | 2013-01-18 | 2013-07-31 | 合肥市瑞宏铸造有限公司 | High temperature resisting pouring device |
| CN103386476A (en) * | 2013-06-04 | 2013-11-13 | 德州宏森机械有限公司 | Composite double-metal vertical roller mill grinding roller and manufacturing process |
| CN104174833A (en) * | 2014-08-06 | 2014-12-03 | 佳木斯大学 | Production technology for casting wear-resistant thin plates by compounding double liquid metals |
-
2016
- 2016-04-22 CN CN201610257738.5A patent/CN105772688A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1984004760A1 (en) * | 1983-05-30 | 1984-12-06 | Vickers Australia Ltd | Tough, wear- and abrasion-resistant, high chromium hypereutectic white iron |
| CN1962122A (en) * | 2005-11-11 | 2007-05-16 | 郭继伟 | Process for manufacturing bimetal compound casting liner plate |
| CN101239381A (en) * | 2007-02-05 | 2008-08-13 | 荣守范 | Production technique method of double-liquid bimetal composite casting hammer type hammerhead |
| CN102019403A (en) * | 2011-01-05 | 2011-04-20 | 武汉智科耐磨材料科技发展有限公司 | Technique for producing dual-liquid dual-metal composite wear-resistant lining plate by lost foam casting |
| CN102327794A (en) * | 2011-08-05 | 2012-01-25 | 昆明理工大学 | Cr-free high boron iron-based wear-resisting dual-liquid dual-metal compound hammerhead and manufacturing method thereof |
| CN102847880A (en) * | 2012-09-07 | 2013-01-02 | 杨邦树 | Special material co-casting cast mold and special material co-casting cast production process |
| CN102921927A (en) * | 2012-11-15 | 2013-02-13 | 北京工业大学 | Preparation method of double-liquid bimetal composite wear-resistant lining board |
| CN203091679U (en) * | 2013-01-18 | 2013-07-31 | 合肥市瑞宏铸造有限公司 | High temperature resisting pouring device |
| CN103386476A (en) * | 2013-06-04 | 2013-11-13 | 德州宏森机械有限公司 | Composite double-metal vertical roller mill grinding roller and manufacturing process |
| CN104174833A (en) * | 2014-08-06 | 2014-12-03 | 佳木斯大学 | Production technology for casting wear-resistant thin plates by compounding double liquid metals |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107866547A (en) * | 2016-09-23 | 2018-04-03 | 长城汽车股份有限公司 | The casting system of embedded mould |
| CN107866528A (en) * | 2016-09-23 | 2018-04-03 | 长城汽车股份有限公司 | The casting technique of diel |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1326646C (en) | Vacuum pump impeller integral casting process | |
| CN103846392B (en) | The casting method of spheroidal graphite cast-iron knuckle | |
| CN102728790A (en) | Sand-line iron mould casting process for grey cast iron flywheel housing of diesel engine | |
| CN111360201B (en) | Casting structure and casting method of internal gear box | |
| CN112658210B (en) | Sectional casting method for subway bogie special-shaped steel casting | |
| JP4789241B2 (en) | Tire mold casting method | |
| CN202984579U (en) | Cylinder cover casting die | |
| CN105798271A (en) | Automobile mold casting cast by compounding ductile iron and gray iron, gating system and casting method | |
| CN106001446A (en) | Method and mold for producing passenger car engine single-chip main bearing cover | |
| CN109047667A (en) | A kind of buhl saw bearing block casting technique | |
| CN111482556A (en) | Casting method of engine cylinder block casting | |
| CN108097923A (en) | A kind of differential pressure pressurization casting machine fills the casting device and casting method of type High Pressure Solidification with low pressure | |
| CN105772688A (en) | Automobile mold casting compositely casted through Cr12 type steel and gray iron, pouring system and casting method | |
| CN107790678A (en) | A kind of biliquid composite casting method for automobile die cast | |
| CN105798273A (en) | Double-liquid compound casting method | |
| CN105798272A (en) | Automobile mold casting cast by compounding alloy gray iron and ordinary gray iron, gating system and casting method | |
| EP0531051B1 (en) | Apparatus and method for casting in graphite molds | |
| CN102994857A (en) | Technology for producing ductile iron flange | |
| CN105772687A (en) | Automobile mold casting compositely casted through cold work die steel and gray iron, pouring system and casting method | |
| CN110129626A (en) | Aerial blade die-casting process | |
| CN105903930A (en) | Double-liquid composite casting method for automobile die casting | |
| CN105772686A (en) | Bimetal composite casting pouring system | |
| CN112828245B (en) | Manufacturing method and manufacturing die for producing threaded sleeve of cylinder of plastic extruding machine | |
| CN207288862U (en) | The automobile die cast and running gate system of cold work die steel and gray iron composite casting | |
| CN206839129U (en) | A kind of bimetal composite casting system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160720 |
|
| RJ01 | Rejection of invention patent application after publication |