CN108927506A - The preparation method of spheroidal graphite cast-iron and gray cast iron alloying formula brake disc - Google Patents
The preparation method of spheroidal graphite cast-iron and gray cast iron alloying formula brake disc Download PDFInfo
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- CN108927506A CN108927506A CN201810954491.1A CN201810954491A CN108927506A CN 108927506 A CN108927506 A CN 108927506A CN 201810954491 A CN201810954491 A CN 201810954491A CN 108927506 A CN108927506 A CN 108927506A
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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
- 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
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Abstract
The present invention relates to a kind of preparation methods of brake disc, the preparation method of specifically a kind of spheroidal graphite cast-iron and gray cast iron alloying formula brake disc, the following steps are included: prepared by S1, spheroidal graphite cast-iron inner ring: taking a spheroidal graphite cast-iron casting mold, there is the type chamber A in circular ring shape in spheroidal graphite cast-iron casting mold, 1340~1440 DEG C of molten ductile cast iron is injected into type chamber A to fill up type chamber A, molten ductile cast iron solidifies in type chamber A with the reduction of temperature, and spheroidal graphite cast-iron inner ring is formed after the heat preservation of 30~60min；Spheroidal graphite cast-iron and gray cast iron alloying formula brake disc finished product is made in S2, gray cast iron outer ring.Preparation process of the present invention is simple, and finished product has both excellent heat dissipation performance and structural strength.
Description
Technical field
The present invention relates to a kind of preparation method of brake disc, specifically a kind of spheroidal graphite cast-iron and gray cast iron alloying formula brake disc
Preparation method.
Background technique
Existing automobile brake disc is made of single cast iron materials, generallys use gray cast iron or spheroidal graphite cast-iron.
Gray cast iron has good thermal conductivity, but intensity is relatively low, using it as brake disc made of material and entire system
The frequency phase-difference of dynamic device assembly is little, the defects of braking automobile shake, abnormal sound, material heat fatigue easily occurs, frequently makes in automobile
Under conditions of dynamic, it is also possible to the case where disk body cracking occur.Its good thermal conductivity can make braking surface faster heat dissipation, but heat is same
Sample can be quickly transmitted in internal ABS anti-lock braking system along disk body, make ABS temperature distortion, affected sensor and received signal,
It can make ABS operational failure, affect brake safe.
Spheroidal graphite cast-iron has the characteristics that intensity is high, and the tensile strength of gray cast iron can achieve 250MPa or more, and spheroidal graphite is cast
The minimum reachable 400MPa of iron tensile strength, while also there is high elongation percentage, such performance makes braking made of spheroidal graphite cast-iron
Disk is not likely to produce fracture, will not generate and traffic accident occurs because of brake disc fracture.But thermal conductivity is poor, is made using it of material
Brake disc, the heat that when braking generates cannot conduct quickly, cause the temperature of braking surface higher, paired rubs
Pad temperature can also increase, and influence braking effect.
Summary of the invention
Technical problem to be solved by the invention is to provide the preparations of a kind of spheroidal graphite cast-iron and gray cast iron alloying formula brake disc
Method, preparation process is simple, and finished product has both excellent heat dissipation performance and structural strength.
The technical scheme to solve the above technical problems is that a kind of spheroidal graphite cast-iron and gray cast iron alloying formula brake disc
Preparation method, comprising the following steps:
S1, the preparation of spheroidal graphite cast-iron inner ring:
It takes a spheroidal graphite cast-iron casting mold, there is the type chamber A in circular ring shape in the spheroidal graphite cast-iron casting mold, to described
The molten ductile cast iron of 1340~1440 DEG C of injection is in type chamber A to fill up the type chamber A, and the molten ductile cast iron is in the type
It is solidified in chamber A with the reduction of temperature, forms spheroidal graphite cast-iron inner ring after the heat preservation of 30~60min；
S2, gray cast iron outer ring alloying:
A gray cast iron casting mold is taken, there is circular type chamber B in the gray cast iron casting mold, it is spare；By the ball
Black cast iron inner ring in 24 hours, by blasting treatment, removes the scab and corrosion on its surface before alloying, then the spheroidal graphite casting
Iron inner ring is heated and is kept the temperature under 30~60 DEG C of temperature environment, 30~60 DEG C of the spheroidal graphite cast-iron inner ring is placed on described
It is intermediate in type chamber B, and the gray cast iron molten iron of 1380-1480 DEG C of injection is described to fill up the type chamber B in the backward type chamber B
Gray cast iron molten iron solidifies in the type chamber B with the reduction of temperature, and is fixed together with the spheroidal graphite cast-iron inner ring, passes through
The heat preservation of 30~60min forms gray cast iron outer ring, so that completing alloying forms brake disc blank, takes out the brake disc blank warp
The spheroidal graphite cast-iron and gray cast iron alloying formula brake disc finished product that may be mounted on automotive hub are formed after crossing following process.
The beneficial effects of the present invention are:
1, preparation process is simple, is suitable for large-scale production.
2, finished product changes the structure of original brake disc, is made of gray cast iron outer ring and spheroidal graphite cast-iron inner ring alloying, wherein
The spheroidal graphite cast-iron that the spheroidal graphite cast-iron inner ring connecting with wheel hub uses has the characteristics that intensity height and poor thermal conductivity, the spheroidal graphite cast-iron
Even if the high intensity of inner ring makes the entire brake disc gray cast iron outer ring that cracking phenomena will not occur because braking is cracked,
Brake safe will not be influenced because brake component is broken；The poor thermal conductivity of the spheroidal graphite cast-iron inner ring makes outside the gray cast iron
Ring is because the amount of heat that braking generates only seldom is partially transferred in the spheroidal graphite cast-iron inner ring, so that the spheroidal graphite is cast
The ABS gear ring installed in iron inner ring by heat influenced it is small, will not because of ABS temperature distortion influence sensor receive signal,
ABS operational failure is avoided, guarantees brake safe.
3, the gray cast iron outer ring enables brake disc rapid cooling by the good thermal conductivity of gray cast iron, it is ensured that brake disc
Braking effect.
4, the variation of bi-material layers and structure makes the intrinsic frequency of brake disc and former design have very big difference, can effectively avoid because
The frequency phase-difference of brake disc and entire brake assembly less caused by brake shake, abnormal sound, material heat fatigue the defects of.
Further, in S2, the type chamber B is interior, the spheroidal graphite cast-iron inner ring is circular outside is placed with several axially extending bores
Circular sand core, the Gray Iron that the axially extending bore is filled after the gray cast iron molten iron is injected into the type chamber B
Water forms ventilated rib.
Beneficial effect using above-mentioned further technical solution is: promoting institute using the gap between the adjacent ventilated rib
State the heat dissipation performance of gray cast iron outer ring.
Further, in S1, the type chamber A outer circumferential side wall has several grooves, the week of the spheroidal graphite cast-iron inner ring
The protrusion to match on outer wall with formation after the injection solidification of the molten ductile cast iron with the corresponding groove；In S2,
The inner wall of the circular sand core corresponds to the protrusion and offers filling slot, and the size of the filling slot is greater than corresponding described convex
It rises, and the filling slot is injected in the type chamber B with the gray cast iron molten iron and filled up by the gray cast iron molten iron.
Beneficial effect using above-mentioned further technical solution is: promoting the gray cast iron outer ring and institute using the protrusion
Circumferential load carrying capacity after stating spheroidal graphite cast-iron inner ring alloying.
Further, in S2, I-shaped slot is opened up on the surface of the protrusion, the I-shaped slot is injected with the gray cast iron molten iron
It is filled up in the type chamber B by the gray cast iron molten iron.
Beneficial effect using above-mentioned further technical solution is: being mentioned using the gray cast iron molten iron solidified in the I-shaped slot
Circumferential direction and radial load ability to bear after rising the gray cast iron outer ring and the spheroidal graphite cast-iron inner ring alloying.
Further, in S2, at least one U-shaped groove is offered in the side wall of the protrusion, the U-shaped groove is with the ash
Molten cast iron injects in the type chamber B to be filled up by the gray cast iron molten iron.
Beneficial effect using above-mentioned further technical solution is: utilizing the gray cast iron molten iron solidified in the U-shaped groove
Circumferential load carrying capacity after further promoting the gray cast iron outer ring and the spheroidal graphite cast-iron inner ring alloying.
Further, in S2, the following process sequentially includes blasting treatment, turning and drilling.
Beneficial effect using above-mentioned further technical solution is: promoting quality of finished.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art are briefly described.In all the appended drawings, similar element
Or part is generally identified by similar appended drawing reference.In attached drawing, each element or part might not be drawn according to actual ratio.
Fig. 1 is finished product of embodiment of the present invention birds-eye perspective；
Fig. 2 is the top view of circular sand core of the embodiment of the present invention；
Fig. 3 is the top view of spheroidal graphite cast-iron of embodiment of the present invention inner ring；
Appended drawing reference:
1- gray cast iron outer ring；2- ventilated rib；3- I-shaped slot；4- protrusion；5- spheroidal graphite cast-iron inner ring；6-U type groove；7- filling
Slot；8- circular sand core；9- axially extending bore
Specific embodiment
It is described in detail below in conjunction with embodiment of the attached drawing to technical solution of the present invention.Following embodiment is only used for
Clearly illustrate technical solution of the present invention, therefore be only used as example, and cannot be used as a limitation and limit protection model of the invention
It encloses.
Embodiment 1
As shown in Figure 1, Figure 2 and Figure 3, the preparation method of a kind of spheroidal graphite cast-iron and gray cast iron alloying formula brake disc, including with
Lower step:
It is prepared by S1, spheroidal graphite cast-iron inner ring 5:
A spheroidal graphite cast-iron casting mold is taken, there is the type chamber A in circular ring shape, into type chamber A in spheroidal graphite cast-iron casting mold
To fill up type chamber A, molten ductile cast iron solidifies in type chamber A with the reduction of temperature the molten ductile cast iron of 1340 DEG C of injection,
Spheroidal graphite cast-iron inner ring 5 is formed after the heat preservation of 60min；
S2,1 alloying of gray cast iron outer ring:
A gray cast iron casting mold is taken, there is circular type chamber B in gray cast iron casting mold, it is spare；It will be in spheroidal graphite cast-iron
Ring 5 in 24 hours, by blasting treatment, removes the scab and corrosion on its surface, then spheroidal graphite cast-iron inner ring 5 is 30 before alloying
DEG C temperature environment under heat and keep the temperature, 30 DEG C of spheroidal graphite cast-iron inner ring 5 is placed in type chamber B it is intermediate, and in backward type chamber B
To fill up type chamber B, gray cast iron molten iron solidifies in type chamber B with the reduction of temperature the gray cast iron molten iron of 1380 DEG C of injection, and with
Spheroidal graphite cast-iron inner ring 5 is fixed together, and forms gray cast iron outer ring 1 by the heat preservation of 60min, so that completing alloying forms brake disc
Blank takes out brake disc blank and forms the spheroidal graphite cast-iron that may be mounted on automotive hub and gray cast iron alloying after following process
Formula brake disc finished product.
Preferably, in S2, type chamber B is interior, spheroidal graphite cast-iron inner ring 5 surround be placed with the annulus with several axially extending bores 9 outside
Shape sand core 8 injects the gray cast iron molten iron formation ventilated rib 2 of filling axially extending bore 9 after gray cast iron molten iron into type chamber B.
Preferably, in S1, type chamber A outer circumferential side wall has several grooves, in the peripheral outer wall of spheroidal graphite cast-iron inner ring 5
The protrusion 4 to match with formation after the injection solidification of molten ductile cast iron with corresponding groove；In S2, circular sand core 8 it is interior
Wall respective protrusions 4 offer filling slot 7, and the size of filling slot 7 is greater than corresponding raised 4, and filling slot 7 is infused with gray cast iron molten iron
Enter and is filled up in type chamber B by gray cast iron molten iron.
Preferably, in S2, I-shaped slot 3 is opened up on the surface of protrusion 4, I-shaped slot 3 is with quilt in gray cast iron molten iron injection type chamber B
Gray cast iron molten iron fills up.
Preferably, in S2, a U-shaped groove 6 is offered respectively in three side walls of protrusion 4, and U-shaped groove 6 is with gray cast iron
It is filled up in molten iron injection type chamber B by gray cast iron molten iron.
Preferably, in S2, following process sequentially includes blasting treatment, turning and drilling.
Embodiment 2
As shown in Figure 1, Figure 2 and Figure 3, the preparation method of a kind of spheroidal graphite cast-iron and gray cast iron alloying formula brake disc, including with
Lower step:
It is prepared by S1, spheroidal graphite cast-iron inner ring 5:
A spheroidal graphite cast-iron casting mold is taken, there is the type chamber A in circular ring shape, into type chamber A in spheroidal graphite cast-iron casting mold
To fill up type chamber A, molten ductile cast iron solidifies in type chamber A with the reduction of temperature the molten ductile cast iron of 1390 DEG C of injection,
Spheroidal graphite cast-iron inner ring 5 is formed after the heat preservation of 45min；
S2,1 alloying of gray cast iron outer ring:
A gray cast iron casting mold is taken, there is circular type chamber B in gray cast iron casting mold, it is spare；It will be in spheroidal graphite cast-iron
Ring 5 in 24 hours, by blasting treatment, removes the scab and corrosion on its surface, then spheroidal graphite cast-iron inner ring 5 is 45 before alloying
DEG C temperature environment under heat and keep the temperature, 45 DEG C of spheroidal graphite cast-iron inner ring 5 is placed in type chamber B it is intermediate, and in backward type chamber B
To fill up type chamber B, gray cast iron molten iron solidifies in type chamber B with the reduction of temperature the gray cast iron molten iron of 1440 DEG C of injection, and with
Spheroidal graphite cast-iron inner ring 5 is fixed together, and forms gray cast iron outer ring 1 by the heat preservation of 45min, so that completing alloying forms brake disc
Blank takes out brake disc blank and forms the spheroidal graphite cast-iron that may be mounted on automotive hub and gray cast iron alloying after following process
Formula brake disc finished product.
Preferably, in S2, type chamber B is interior, spheroidal graphite cast-iron inner ring 5 surround be placed with the annulus with several axially extending bores 9 outside
Shape sand core 8 injects the gray cast iron molten iron formation ventilated rib 2 of filling axially extending bore 9 after gray cast iron molten iron into type chamber B.
Preferably, in S1, type chamber A outer circumferential side wall has several grooves, in the peripheral outer wall of spheroidal graphite cast-iron inner ring 5
The protrusion 4 to match with formation after the injection solidification of molten ductile cast iron with corresponding groove；In S2, circular sand core 8 it is interior
Wall respective protrusions 4 offer filling slot 7, and the size of filling slot 7 is greater than corresponding raised 4, and filling slot 7 is infused with gray cast iron molten iron
Enter and is filled up in type chamber B by gray cast iron molten iron.
Preferably, in S2, I-shaped slot 3 is opened up on the surface of protrusion 4, I-shaped slot 3 is with quilt in gray cast iron molten iron injection type chamber B
Gray cast iron molten iron fills up.
Preferably, in S2, a U-shaped groove 6 is offered respectively in three side walls of protrusion 4, and U-shaped groove 6 is with gray cast iron
It is filled up in molten iron injection type chamber B by gray cast iron molten iron.
Preferably, in S2, following process sequentially includes blasting treatment, turning and drilling.
Embodiment 3
As shown in Figure 1, Figure 2 and Figure 3, the preparation method of a kind of spheroidal graphite cast-iron and gray cast iron alloying formula brake disc, including with
Lower step:
It is prepared by S1, spheroidal graphite cast-iron inner ring 5:
A spheroidal graphite cast-iron casting mold is taken, there is the type chamber A in circular ring shape, into type chamber A in spheroidal graphite cast-iron casting mold
To fill up type chamber A, molten ductile cast iron solidifies in type chamber A with the reduction of temperature the molten ductile cast iron of 1440 DEG C of injection,
Spheroidal graphite cast-iron inner ring 5 is formed after the heat preservation of 30min；
S2,1 alloying of gray cast iron outer ring:
A gray cast iron casting mold is taken, there is circular type chamber B in gray cast iron casting mold, it is spare；It will be in spheroidal graphite cast-iron
Ring 5 in 24 hours, by blasting treatment, removes the scab and corrosion on its surface, then spheroidal graphite cast-iron inner ring 5 is 60 before alloying
DEG C temperature environment under heat and keep the temperature, 60 DEG C of spheroidal graphite cast-iron inner ring 5 is placed in type chamber B it is intermediate, and in backward type chamber B
To fill up type chamber B, gray cast iron molten iron solidifies in type chamber B with the reduction of temperature the gray cast iron molten iron of 1480 DEG C of injection, and with
Spheroidal graphite cast-iron inner ring 5 is fixed together, and forms gray cast iron outer ring 1 by the heat preservation of 30min, so that completing alloying forms brake disc
Blank takes out brake disc blank and forms the spheroidal graphite cast-iron that may be mounted on automotive hub and gray cast iron alloying after following process
Formula brake disc finished product.
Preferably, in S2, type chamber B is interior, spheroidal graphite cast-iron inner ring 5 surround be placed with the annulus with several axially extending bores 9 outside
Shape sand core 8 injects the gray cast iron molten iron formation ventilated rib 2 of filling axially extending bore 9 after gray cast iron molten iron into type chamber B.
Preferably, in S1, type chamber A outer circumferential side wall has several grooves, in the peripheral outer wall of spheroidal graphite cast-iron inner ring 5
The protrusion 4 to match with formation after the injection solidification of molten ductile cast iron with corresponding groove；In S2, circular sand core 8 it is interior
Wall respective protrusions 4 offer filling slot 7, and the size of filling slot 7 is greater than corresponding raised 4, and filling slot 7 is infused with gray cast iron molten iron
Enter and is filled up in type chamber B by gray cast iron molten iron.
Preferably, in S2, I-shaped slot 3 is opened up on the surface of protrusion 4, I-shaped slot 3 is with quilt in gray cast iron molten iron injection type chamber B
Gray cast iron molten iron fills up.
Preferably, in S2, a U-shaped groove 6 is offered respectively in three side walls of protrusion 4, and U-shaped groove 6 is with gray cast iron
It is filled up in molten iron injection type chamber B by gray cast iron molten iron.
Preferably, in S2, the following process sequentially includes blasting treatment, turning and drilling.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme should all cover within the scope of the claims and the description of the invention.
Claims (6)
1. the preparation method of a kind of spheroidal graphite cast-iron and gray cast iron alloying formula brake disc, which comprises the following steps:
S1, spheroidal graphite cast-iron inner ring (5) preparation:
A spheroidal graphite cast-iron casting mold is taken, there is the type chamber A in circular ring shape, to the type chamber in the spheroidal graphite cast-iron casting mold
The molten ductile cast iron of 1340~1440 DEG C of injection is in A to fill up the type chamber A, and the molten ductile cast iron is in the type chamber A
The interior reduction with temperature and solidify, after the heat preservation of 30~60min formed spheroidal graphite cast-iron inner ring (5)；
S2, gray cast iron outer ring (1) alloying:
A gray cast iron casting mold is taken, there is circular type chamber B in the gray cast iron casting mold, it is spare；The spheroidal graphite is cast
Iron inner ring (5) in 24 hours, by blasting treatment, removes the scab and corrosion on its surface before alloying, then the spheroidal graphite casting
Iron inner ring (5) is heated and is kept the temperature under 30~60 DEG C of temperature environment, and 30~60 DEG C of the spheroidal graphite cast-iron inner ring (5) is placed
It is intermediate in the type chamber B, and the gray cast iron molten iron of 1380-1480 DEG C of injection is in the backward type chamber B to fill up the type chamber
B, the gray cast iron molten iron solidifies in the type chamber B with the reduction of temperature, and is fixed on the spheroidal graphite cast-iron inner ring (5)
Together, gray cast iron outer ring (1) is formed by the heat preservation of 30~60min, so that alloying formation brake disc blank is completed, described in taking-up
Brake disc blank forms the spheroidal graphite cast-iron that may be mounted on automotive hub and gray cast iron alloying formula brake disc after following process
Finished product.
2. the preparation method of spheroidal graphite cast-iron according to claim 1 and gray cast iron alloying formula brake disc, which is characterized in that S2
In, the type chamber B is interior, the spheroidal graphite cast-iron inner ring (5) is circular outside is placed with the circular sand core with several axially extending bores (9)
(8), it is injected into the type chamber B and fills the gray cast iron molten iron of the axially extending bore (9) after the gray cast iron molten iron and formed
Ventilated rib (2).
3. the preparation method of spheroidal graphite cast-iron according to claim 2 and gray cast iron alloying formula brake disc, which is characterized in that S1
In, the type chamber A outer circumferential side wall has several grooves, with described in the peripheral outer wall of the spheroidal graphite cast-iron inner ring (5)
The protrusion (4) to match with the corresponding groove is formed after the injection solidification of molten ductile cast iron；In S2, the circular ring shape sand
The inner wall of core (8) corresponds to raised (4) and offers filling slot (7), and the size of the filling slot (7) is greater than corresponding described convex
It rises (4), and the filling slot (7) is injected in the type chamber B with the gray cast iron molten iron and filled up by the gray cast iron molten iron.
4. the preparation method of spheroidal graphite cast-iron according to claim 3 and gray cast iron alloying formula brake disc, which is characterized in that S2
In, it is opened up I-shaped slot (3) on the surface of raised (4), the I-shaped slot (3) injects the type chamber with the gray cast iron molten iron
It is filled up in B by the gray cast iron molten iron.
5. the preparation method of spheroidal graphite cast-iron according to claim 3 and gray cast iron alloying formula brake disc, which is characterized in that S2
In, the side wall in raised (4) offers at least one U-shaped groove (6), and the U-shaped groove (6) is with the gray cast iron molten iron
It injects in the type chamber B and is filled up by the gray cast iron molten iron.
6. the preparation method of spheroidal graphite cast-iron according to any one of claims 1 to 5 and gray cast iron alloying formula brake disc, special
Sign is, in S2, the following process sequentially includes blasting treatment, turning and drilling.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810954491.1A CN108927506A (en) | 2018-08-21 | 2018-08-21 | The preparation method of spheroidal graphite cast-iron and gray cast iron alloying formula brake disc |
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| CN201810954491.1A CN108927506A (en) | 2018-08-21 | 2018-08-21 | The preparation method of spheroidal graphite cast-iron and gray cast iron alloying formula brake disc |
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| CN108927506A true CN108927506A (en) | 2018-12-04 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113458363A (en) * | 2021-07-26 | 2021-10-01 | 驻马店恒久机械制造有限公司 | Bimetal iron-iron composite brake drum and manufacturing method thereof |
| CN114029474A (en) * | 2021-11-22 | 2022-02-11 | 山西汤荣机械制造股份有限公司 | Nodular cast iron-gray cast iron composite brake drum and preparation method thereof |
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| CN108331864A (en) * | 2018-04-19 | 2018-07-27 | 驻马店恒久机械制造有限公司 | A kind of composite brake disc and preparation method thereof |
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| CN101618452A (en) * | 2009-07-27 | 2010-01-06 | 河南省汤阴县华兴机械制造有限公司 | Method for manufacturing brake drum for automobile |
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| CN113458363A (en) * | 2021-07-26 | 2021-10-01 | 驻马店恒久机械制造有限公司 | Bimetal iron-iron composite brake drum and manufacturing method thereof |
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| CN114029474A (en) * | 2021-11-22 | 2022-02-11 | 山西汤荣机械制造股份有限公司 | Nodular cast iron-gray cast iron composite brake drum and preparation method thereof |
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Application publication date: 20181204 |
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| WW01 | Invention patent application withdrawn after publication |