CN107345285A - Automobile brake disc alloy gray cast-iron material, automobile brake disc and preparation method thereof - Google Patents
Automobile brake disc alloy gray cast-iron material, automobile brake disc and preparation method thereof Download PDFInfo
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- CN107345285A CN107345285A CN201610293337.5A CN201610293337A CN107345285A CN 107345285 A CN107345285 A CN 107345285A CN 201610293337 A CN201610293337 A CN 201610293337A CN 107345285 A CN107345285 A CN 107345285A
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- China
- Prior art keywords
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- brake disc
- automobile brake
- iron
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Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/10—Cast-iron alloys containing aluminium or silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/06—Cast-iron alloys containing chromium
-
- 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
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
- F16D69/02—Compositions of linings; Methods of manufacturing
- F16D69/027—Compositions based on metals or inorganic oxides
-
- 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
- F16D2200/00—Materials; Production methods therefor
- F16D2200/0004—Materials; Production methods therefor metallic
- F16D2200/0008—Ferro
- F16D2200/0013—Cast iron
-
- 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
- F16D2250/00—Manufacturing; Assembly
- F16D2250/0007—Casting
Abstract
The invention discloses a kind of automobile brake disc alloy gray cast-iron material, automobile brake disc and preparation method thereof, wherein, the alloy gray cast-iron material is as follows by mass percentage：C content is that 3.5%~3.6%, Mn contents are that 0.5%~0.6%, Cr contents are 0.25%~0.35%, Cu contents are that 0.6%~0.8%, Nb contents are that 0.4%~0.5%, Si contents are 1.8%~2.0%, P content is that≤0.2%, S contents are≤0.12%, and remaining is iron.The present invention can improve the graphite form of carbon equivalent high brake disc by adding alloying element and be allowed to refine, so that brake disc has the combination properties such as good heat conductivity and wearability, so as to meet the high standard brake disc required for high-performing car, solves the problems, such as the requirement that can not meet high-performing car of existing automobile brake disc.
Description
Technical field
The present invention relates to alloy steel material technical field, more particularly to a kind of automobile brake disc alloy gray cast-iron
Material, automobile brake disc and preparation method thereof.
Background technology
Automobile brake disc subjects huge frictional force and pressure and is in and cold and heat succeed each other in brake process
In the state of, it is easily deformed cracking.Gray cast iron is due to its excellent wearability, thermal conductivity and damping is
Manufacture the ideal material of automobile brake disc., will to the quality of automobile brake disc with the raising of automotive performance
Also more and more higher is sought, traditional non-alloyed gray cast iron can not meet to require, urgent need is developed a kind of new
The alloy gray cast-iron of type replaces original material.
By taking an automobile brake disc diameter 400mm as an example, its minimum wall thickness (MINI W.) is 8.6mm, casting quality 14
kg.According to american car accessory standard SAE-J431, it is desirable to A+B types stone in automobile brake disc metallographic structure
Black sum is more than or equal to 85%, and graphite length scale is 4~6, and content of pearlite in alloy is more than 90%, and ferrite contains
Amount is less than 10%, and tensile strength is more than or equal to 250MPa, and body hardness is HB 207~255, finished product tissue
In c-type and E type graphite must not occur, the chemical composition of automobile brake disc is as shown in table 1 below.
The main chemical compositions of the automobile brake disc of table 1
Table 1The main chemical composition of brake disc WB/ %
According to the chemical composition shown in table 1, automobile brake disc is made using smelting technology in the prior art, adopted
Tension test, Lycra DMI are carried out with the casting test block attached to the automobile brake disc of DNS-100 electronic universal testers
- 3000M inverted metallurgic microscopes carry out the observation of metallographic structure, the measurement casting of HBE-3000 Brinell hardness testers
The hardness of part.Test result is referring to Fig.1 and 2, Fig. 1 is that automobile brake disc is uncorroded in the prior art
Metallograph, Fig. 2 are the metallographs after automobile brake disc corrosion in the prior art.As seen from Figure 1,
It is largely A type graphite in tissue, and with the c-type graphite of thick sheet, due to the carbon content in iron liquid
It is higher, and automobile brake disc cooling velocity in die cavity is slower, after kish separates out from iron liquid, institute
It is smaller by resistance, thicker sheet c-type graphite, because graphite is thick, automobile brake disc will be grown into
Mechanical property is remarkably decreased.In Fig. 2, color it is deeper be organized as graphite, matrix is pearlite, white
Small strip and chainlike distribution for iron phosphide eutectic, and austenite transformation production is dispersed with partial white iron phosphide
Thing, while occur clear area in white base.The iron phosphide eutectic of the hard wear resistant of chainlike distribution is as wear-resistant
Skeleton can significantly improve the wearability of automobile brake disc, extend its service life.But iron phosphide eutectic is crisp
Property phase, substantial amounts of iron phosphide eutectic can cause the fragility of automobile brake disc to increase, and machinability deteriorates.
In the case of not adding alloying element, automobile brake disc is organized as A+C type graphite, and length scale is 1~2
Level, matrix have more iron phosphide eutectic.Through mechanics properties testing, casting tensile strength is 226.2MPa, base
Body hardness is HB 208.
During the present invention is realized, inventor has found that at least there are the following problems in the prior art：
With the raising of automotive performance, the standard of required automobile brake disc requires also more and more higher, existing
Some automobile brake discs can not meet to require.
The content of the invention
The technical problems to be solved by the invention are that existing automobile brake disc can not meet high-performing car
Requirement.
In order to solve the above problems, the invention provides automobile brake disc alloy gray cast-iron material, institute
It is as follows by mass percentage to state alloy gray cast-iron material：C content is that 3.5%~3.6%, Mn contents are
0.5%~0.6%, Cr content are that 0.25%~0.35%, Cu contents are that 0.6%~0.8%, Nb contents are
0.4%~0.5%, Si content are 1.8%~2.0%, and P content is that≤0.2%, S contents are≤0.12%, remaining
For iron.
Alternatively, the alloy gray cast-iron material is as follows by mass percentage：C content is 3.5%~3.6%,
Mn contents are that 0.5%~0.6%, Cr contents are that 0.25%, Cu contents are that 0.7%, Nb contents are 0.5%,
Si contents are 1.8%, and P content is that≤0.2%, S contents are≤0.12%, and remaining is iron.
Alternatively, the alloy gray cast-iron material is as follows by mass percentage：C content is 3.5%~3.6%,
Mn contents are that 0.5%~0.6%, Cr contents are that 0.35%, Cu contents are that 0.6%, Nb contents are 0.5%,
Si contents are 1.8%, and P content is that≤0.2%, S contents are≤0.12%, and remaining is iron.
Alternatively, the alloy gray cast-iron material is as follows by mass percentage：C content is 3.5%~3.6%,
Mn contents are that 0.5%~0.6%, Cr contents are that 0.35%, Cu contents are that 0.8%, Nb contents are 0.4%,
Si contents are 1.8%, and P content is that≤0.2%, S contents are≤0.12%, and remaining is iron.
The present invention separately provides a kind of automobile brake disc, and its making material is foregoing alloy gray cast-iron material
Material.
Present invention also offers a kind of preparation method of automobile brake disc, including：
Iron material is fitted into crucible burner hearth by the mass percent of any one of Claims 1-4, then
It is sent into melting in medium frequency induction melting furnace；
After the iron material is completely melt, added by the mass percent of any one of Claims 1-4
C, Mn, Cr, Cu, Nb, Si, P, S and inovulant；
After tapping a blast furnace, molten iron is come out of the stove and poured into a mould, 1400 DEG C~1500 DEG C of pouring temperature.
Alternatively, the inovulant is 75SiFe.
Alternatively, the pouring temperature is 1450 DEG C.
Alternatively, tapping temperature is 1470 DEG C~1570 DEG C.
Alternatively, the tapping temperature is 1520 DEG C.
Compared with prior art, technical scheme has advantages below：
The graphite form of carbon equivalent high brake disc can be improved by adding alloying element and be allowed to refine, made
Obtaining brake disc has the combination properties such as good heat conductivity and wearability, so as to meet high-performing car institute
The high standard brake disc needed, solve existing automobile brake disc can not meet wanting for high-performing car
The problem of asking.
Brief description of the drawings
Fig. 1 is the uncorroded metallograph of automobile brake disc in the prior art.
Fig. 2 is the metallograph after automobile brake disc corrosion in the prior art.
Fig. 3 is the uncorroded metallograph of automobile brake disc of the present invention.
Fig. 4 is the metallograph after automobile brake disc corrosion of the present invention.
Fig. 5 is schematic flow sheet of the preparation method of automobile brake disc of the present invention in an embodiment.
Embodiment
Many details are elaborated in the following description in order to fully understand the present invention.But this hair
Bright to be implemented with being much different from other manner described here, those skilled in the art can be not
Similar popularization is done in the case of running counter to intension of the present invention, therefore the present invention is not by following public specific implementation
Limitation.
Secondly, the present invention is described in detail using schematic diagram, when the embodiment of the present invention is described in detail, for just
In explanation, the schematic diagram is example, and it should not limit the scope of protection of the invention herein.
Embodiment one
Because existing brake disc carbon, phosphorus content are higher, exist in metallographic structure thick c-type graphite and
More iron phosphide eutectic, cause its performance to be far not by far up to the mark, therefore Alloying Design need to be carried out.Gray cast iron
The alloying element often added has chromium, vanadium, molybdenum, niobium, copper etc..Chromium is carbide former, in iron liquid
There is 85% to be solid-solution in austenite in process of setting, promote the generation of meta-stable system eutectic reaction, refine pearly-lustre
Body, improve the intensity of gray cast iron.Vanadium promotes the formation of pearlite and can be allowed to refine, and improves gray cast iron
Intensity and hardness, casting Dispersed precipitate can occur after by high-temperature carbonization annealing in ferrite
Trickle granular precipitate, intensity and hardness improve on the contrary.Molybdenum reduces stability series eutectic transformation temperature, energy
Refining eutectic group, but molybdenum can be dissolved in cementite and be combined with phosphide, make the increase of iron phosphide eutectic amount.Niobium and iron
Carbon in liquid forms stable carbide, and a small amount of niobium can improve the intensity and hardness of gray cast iron, and niobium energy
Significantly improve gray cast iron normal temperature and high temperature wear ability.Copper has weaker graphitizing, the copper original of solid solution
Son is accumulated near austenite and graphite interface, is hindered carbon to be spread in austenite, is advantageous to pearlite
Refinement.
The above analysis simultaneously considers the factors such as production cost, and we have made such selection：Selected chromium Cr
Content 0.15%~0.35%, copper Cu contents 0.6%~0.8%, in the range of niobium Nb contents 0.3%~0.5%
Orthogonal test (being shown in Table 2 and table 3) is carried out, and tensile strength, the hardness of sample are carried out using JMatPro
With the simulation of thermal conductivity.
The orthogonal test factor level of table 2
Table2The factors and levels of the orthogonal test
The orthogonal test designs table of table 3
Table 3The orthogonal test design WB/ %
The analog result of the sample of table 4
Table 4The simulation results of samples
It is can be seen that from the analog result of table 4 when Cr addition is below 0.25%, sample resists
Tensile strength is all undesirable.For 4~No. 9 samples, Cu addition is at 0.6%, only
The tensile strength of No. 7 samples meets requirement, and Cu addition is at 0.8%, in addition to No. 9 samples, remaining
Sample is unsatisfactory for requiring.It follows that the content 0.6%~0.8% of copper, further, is preferably
0.7%~0.8%.At 0.3%, all samples are unsatisfactory for requiring Nb addition, Nb addition
At 0.4%, only No. 9 samples meet to require, Nb addition is at 0.5%, in addition to No. 3 samples
Remaining sample is satisfied by requiring.In addition to sample 1, the Brinell hardness of remaining all sample is satisfied by requiring,
And 100 DEG C of thermal conductivity of all samples is more or less the same between 55~56.
In view of the calculation error and production cost of software, the chemical composition of selection 5,6,7,8,9
Carry out production checking.In actual production, the chemical composition of casting is not unalterable but at one
In the range of change, so in the first embodiment, the alloy gray cast-iron material is as follows by mass percentage：
C content is that 3.5%~3.6%, Mn contents are that 0.5%~0.6%, Cr contents are 0.25%~0.35%, Cu
Content is that 0.6%~0.8%, Nb contents are that 0.4%~0.5%, Si contents are 1.8%~2.0%, and P content is
≤ 0.2%, S content are≤0.12%, and remaining is iron.According to the 1.1 carry out smelting and pourings, and to examination
Sample carries out physicochemical property detection.The tensile strength of sample is 252.43MPa, and Brinell hardness is HB 209.37.
Fig. 3 is the uncorroded metallograph of automobile brake disc of the present invention, and as seen from Figure 3, addition is closed
After gold element, the graphite in tissue is distributed in A type graphite, and without thick c-type graphite, graphite length
Rank is 4~6 grades, and compared to original metallographic structure, addition alloying element can not only eliminate carbon equivalent high
Thick c-type graphite in brake disc, and graphite can be refined, it is ensured that the tissue of brake disc is qualified.Fig. 4
It is the metallograph after automobile brake disc corrosion of the present invention, as seen from Figure 4, original chain in tissue
Shape iron phosphide eutectic is reduced so that the fragility of matrix reduces.But the frictional behaviour of brake disc does not reduce but, this
It is because NbC particle of the disperse in matrix act as wear-resisting skeleton, NbC particle very littles, and be in non-company
Continuous property is present, and can't destroy the continuity of matrix, does not also interfere with the machinability of brake disc
Energy.
Embodiment two
The alloy gray cast-iron material is as follows by mass percentage：C content is 3.5%~3.6%, Mn contents
It is that 0.25%, Cu contents are that 0.7%, Nb contents are 0.5%, Si contents for 0.5%~0.6%, Cr contents
For 1.8%, P content is that≤0.2%, S contents are≤0.12%, and remaining is iron.
Embodiment three
The alloy gray cast-iron material is as follows by mass percentage：C content is 3.5%~3.6%, Mn contents
It is that 0.35%, Cu contents are that 0.6%, Nb contents are 0.5%, Si contents for 0.5%~0.6%, Cr contents
For 1.8%, P content is that≤0.2%, S contents are≤0.12%, and remaining is iron.
Example IV
The alloy gray cast-iron material is as follows by mass percentage：C content is 3.5%~3.6%, Mn contents
It is that 0.35%, Cu contents are that 0.8%, Nb contents are 0.4%, Si contents for 0.5%~0.6%, Cr contents
For 1.8%, P content is that≤0.2%, S contents are≤0.12%, and remaining is iron.
Embodiment five
Fig. 5 is refer to, present invention also offers a kind of preparation method of automobile brake disc, is comprised the following steps：
Step S1, iron material is loaded into crucible burner hearth by the mass percent of any one of embodiment one to four
In, it is then fed into melting in medium frequency induction melting furnace；
Step S2, after the iron material is completely melt, by the quality hundred of any one of embodiment one to four
Divide than adding C, Mn, Cr, Cu, Nb, Si, P, S and inovulant；
Step S3, after tapping a blast furnace, molten iron is come out of the stove and poured into a mould, 1400 DEG C~1500 DEG C of pouring temperature.
It is preferred that the inovulant added in step s 2 is 75SiFe (75 ferrosilicon).
It is preferred that in step s3, the pouring temperature is preferably 1440 DEG C~1460 DEG C, more excellent to be
1450℃。
Further, tapping temperature is 1470 DEG C~1570 DEG C, and further, tapping temperature is preferably
1510 DEG C~1530 DEG C, more excellent is 1520 DEG C.
Compared with prior art, technical scheme has advantages below：
The graphite form of carbon equivalent high brake disc can be improved by adding alloying element and be allowed to refine, made
Obtaining brake disc has the combination properties such as good heat conductivity and wearability, so as to meet high-performing car institute
The high standard brake disc needed, solve existing automobile brake disc can not meet wanting for high-performing car
The problem of asking.
Although the present invention is disclosed as above with preferred embodiment, it is not for limiting the present invention, appointing
What those skilled in the art without departing from the spirit and scope of the present invention, may be by the disclosure above
Methods and technical content makes possible variation and modification to technical solution of the present invention, therefore, every not take off
From the content of technical solution of the present invention, the technical spirit according to the present invention is made any to above example
Simple modification, equivalent variation and modification, belong to the protection domain of technical solution of the present invention.
Claims (10)
- A kind of 1. automobile brake disc alloy gray cast-iron material, it is characterised in that：The alloy gray cast-iron material is as follows by mass percentage：C content is 3.5%~3.6%, Mn contents It is that 0.25%~0.35%, Cu contents are that 0.6%~0.8%, Nb contents are for 0.5%~0.6%, Cr contents 0.4%~0.5%, Si content are 1.8%~2.0%, and P content is that≤0.2%, S contents are≤0.12%, remaining For iron.
- 2. automobile brake disc according to claim 1 alloy gray cast-iron material, it is characterised in that：The alloy gray cast-iron material is as follows by mass percentage：C content is 3.5%~3.6%, Mn contents It is that 0.25%, Cu contents are that 0.7%, Nb contents are 0.5%, Si contents for 0.5%~0.6%, Cr contents For 1.8%, P content is that≤0.2%, S contents are≤0.12%, and remaining is iron.
- 3. automobile brake disc according to claim 1 alloy gray cast-iron material, it is characterised in that：The alloy gray cast-iron material is as follows by mass percentage：C content is 3.5%~3.6%, Mn contents It is that 0.35%, Cu contents are that 0.6%, Nb contents are 0.5%, Si contents for 0.5%~0.6%, Cr contents For 1.8%, P content is that≤0.2%, S contents are≤0.12%, and remaining is iron.
- 4. automobile brake disc according to claim 1 alloy gray cast-iron material, it is characterised in that：The alloy gray cast-iron material is as follows by mass percentage：C content is 3.5%~3.6%, Mn contents It is that 0.35%, Cu contents are that 0.8%, Nb contents are 0.4%, Si contents for 0.5%~0.6%, Cr contents For 1.8%, P content is that≤0.2%, S contents are≤0.12%, and remaining is iron.
- 5. a kind of automobile brake disc, it is characterised in that the making material of the automobile brake disc is such as claim Alloy gray cast-iron material any one of 1 to 4.
- A kind of 6. preparation method of automobile brake disc, it is characterised in that including：Iron material is fitted into crucible burner hearth by the mass percent of any one of Claims 1-4, so Melting in medium frequency induction melting furnace is sent into afterwards；After the iron material is completely melt, add by the mass percent of any one of Claims 1-4 Enter C, Mn, Cr, Cu, Nb, Si, P, S and inovulant；After tapping a blast furnace, molten iron is come out of the stove and poured into a mould, 1400 DEG C~1500 DEG C of pouring temperature.
- 7. the preparation method of automobile brake disc according to claim 6, it is characterised in that the inovulant For 75SiFe.
- 8. the preparation method of automobile brake disc according to claim 6, it is characterised in that the cast temperature Spend for 1450 DEG C.
- 9. the preparation method of automobile brake disc according to claim 6, it is characterised in that tapping temperature is 1470 DEG C~1570 DEG C.
- 10. the preparation method of automobile brake disc according to claim 9, it is characterised in that the temperature of tapping a blast furnace Spend for 1520 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610293337.5A CN107345285A (en) | 2016-05-05 | 2016-05-05 | Automobile brake disc alloy gray cast-iron material, automobile brake disc and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610293337.5A CN107345285A (en) | 2016-05-05 | 2016-05-05 | Automobile brake disc alloy gray cast-iron material, automobile brake disc and preparation method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108315633A (en) * | 2018-01-26 | 2018-07-24 | 清华大学 | A kind of high conductive high strength gray cast iron and preparation method thereof |
| CN110607478A (en) * | 2018-06-15 | 2019-12-24 | 中原内配集团股份有限公司 | Gray cast iron cylinder liner material and preparation method thereof |
| CN111207172A (en) * | 2018-11-22 | 2020-05-29 | 梅州市洪裕汽车配件制造有限公司 | Heat dissipation type brake disc that contains rare metal |
| CN111519088A (en) * | 2019-02-01 | 2020-08-11 | 帝伯爱尔株式会社 | Iron casting, composite part comprising an iron casting, and method for producing an iron casting |
| CN114525446A (en) * | 2022-02-23 | 2022-05-24 | 扬州晶玖汽车配件有限公司 | Novel alloy gray cast iron material for engine cylinder and preparation method thereof |
| CN115233087A (en) * | 2022-07-14 | 2022-10-25 | 烟台可林特汽车用品有限公司 | High-carbon alloy casting material for automobile brake disc, brake disc and preparation method of brake disc |
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| CN103572150A (en) * | 2013-10-12 | 2014-02-12 | 广西玉柴机器股份有限公司 | Engine air cylinder cover gray cast iron |
| CN104195423A (en) * | 2014-09-24 | 2014-12-10 | 山东宏马工程机械有限公司 | High-carbon low-silicon niobium-containing cast iron brake disc and preparation method thereof |
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| EP0778355A1 (en) * | 1995-12-07 | 1997-06-11 | Mercedes-Benz Ag | Optimized composition of lamellar graphite gray cast iron for brake disks of utility vehicles |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108315633A (en) * | 2018-01-26 | 2018-07-24 | 清华大学 | A kind of high conductive high strength gray cast iron and preparation method thereof |
| CN110607478A (en) * | 2018-06-15 | 2019-12-24 | 中原内配集团股份有限公司 | Gray cast iron cylinder liner material and preparation method thereof |
| CN111207172A (en) * | 2018-11-22 | 2020-05-29 | 梅州市洪裕汽车配件制造有限公司 | Heat dissipation type brake disc that contains rare metal |
| CN111519088A (en) * | 2019-02-01 | 2020-08-11 | 帝伯爱尔株式会社 | Iron casting, composite part comprising an iron casting, and method for producing an iron casting |
| CN114525446A (en) * | 2022-02-23 | 2022-05-24 | 扬州晶玖汽车配件有限公司 | Novel alloy gray cast iron material for engine cylinder and preparation method thereof |
| CN115233087A (en) * | 2022-07-14 | 2022-10-25 | 烟台可林特汽车用品有限公司 | High-carbon alloy casting material for automobile brake disc, brake disc and preparation method of brake disc |
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