CN107326138A - A kind of smelting technology for casting automobile brake hub casts gray cast iron - Google Patents
A kind of smelting technology for casting automobile brake hub casts gray cast iron Download PDFInfo
- Publication number
- CN107326138A CN107326138A CN201710556089.3A CN201710556089A CN107326138A CN 107326138 A CN107326138 A CN 107326138A CN 201710556089 A CN201710556089 A CN 201710556089A CN 107326138 A CN107326138 A CN 107326138A
- Authority
- CN
- China
- Prior art keywords
- casting
- iron
- brake hub
- gray cast
- cast iron
- 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
- 238000005266 casting Methods 0.000 title claims abstract description 34
- 229910001060 Gray iron Inorganic materials 0.000 title claims abstract description 20
- 238000003723 Smelting Methods 0.000 title claims abstract description 12
- 238000005516 engineering process Methods 0.000 title claims abstract description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 42
- 229910052742 iron Inorganic materials 0.000 claims abstract description 21
- 239000002994 raw material Substances 0.000 claims abstract description 17
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 13
- 239000010439 graphite Substances 0.000 claims abstract description 13
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 9
- 229910000604 Ferrochrome Inorganic materials 0.000 claims abstract description 8
- 229910000616 Ferromanganese Inorganic materials 0.000 claims abstract description 8
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical compound [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 8
- DALUDRGQOYMVLD-UHFFFAOYSA-N iron manganese Chemical compound [Mn].[Fe] DALUDRGQOYMVLD-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000010959 steel Substances 0.000 claims abstract description 8
- 238000010792 warming Methods 0.000 claims abstract description 7
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims abstract description 6
- 229910052788 barium Inorganic materials 0.000 claims abstract description 6
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910001562 pearlite Inorganic materials 0.000 claims abstract description 5
- 238000009413 insulation Methods 0.000 claims abstract description 4
- 238000011081 inoculation Methods 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 10
- 238000004458 analytical method Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 6
- 229910052710 silicon Inorganic materials 0.000 claims description 6
- 230000033228 biological regulation Effects 0.000 claims description 5
- 238000002844 melting Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 4
- 238000005070 sampling Methods 0.000 claims description 4
- 239000002893 slag Substances 0.000 claims description 4
- 229910008048 Si-S Inorganic materials 0.000 claims description 3
- 229910006336 Si—S Inorganic materials 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 230000006698 induction Effects 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- ZUZINCHBDVRGPN-UHFFFAOYSA-N [Ba].[Fe].[Si] Chemical compound [Ba].[Fe].[Si] ZUZINCHBDVRGPN-UHFFFAOYSA-N 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 8
- 229910001018 Cast iron Inorganic materials 0.000 description 6
- 229910000805 Pig iron Inorganic materials 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 238000005275 alloying Methods 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- -1 2.0-2.3% carburants Inorganic materials 0.000 description 1
- HMDDXIMCDZRSNE-UHFFFAOYSA-N [C].[Si] Chemical compound [C].[Si] HMDDXIMCDZRSNE-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 235000000396 iron Nutrition 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 239000011573 trace mineral Substances 0.000 description 1
- 235000013619 trace mineral Nutrition 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/08—Manufacture of cast-iron
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/08—Making cast-iron alloys
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Braking Arrangements (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
A kind of smelting technology for casting automobile brake hub casts gray cast iron, make raw material using 70% 80% steel scraps and 20% 30% gray cast iron foundry returns, selection dispensing is 1.0 1.3% carborundum, 2.0 2.3% carburants, content is 65% ferromanganese 0.6 0.8%, content is 60% ferrochrome 0.35 0.45%, content is 30% sulphur iron 0.1 0.2%, it is warming up to 1,400 1450 degree of insulations Celsius, add load weighted ferromanganese, ferrochrome, sulphur iron, it is warming up to 1,450 1480 degree Celsius, 0.5% particulate barium ferrosilicon is added in molten iron with stream when molten iron is come out of the stove, carry out current-following inoculation, inovulant uses granularity 0.5mm Si S inovulants, consumption 0.10 0.15%, pouring temperature is 1,380 1400 degree Celsius.Casting body hardness is HB181 200, and tensile strength is 300 344Mpa, measures metallographic structure for graphite A types, 45 grades of graphite length, pearlite 95 98%, brake hub casting cost per ton reduces by 640 yuan.
Description
Technical field
The present invention relates to the material of trunk brake device, more particularly to make the smelting technology of automobile brake hub casts.
Background technology
The making of current domestic existing trunk brake hub, has gradually adopted synthetic cast iron material, because synthetic cast iron
There is more preferable metallographic structure and Geng Gao comprehensive mechanical performance than traditional cast iron, due to the price difference between the pig iron and steel scrap, close
More there is than steel-casting the advantage in cost into cast iron.According to the damped condition of brake hub, it is desirable to which it casts material capability and is higher than HT
The index of 250 gray irons, is that this should use the proportion scheme of low-carbon silicon equivalent weight；And in order to improve the heat conductivility of braking moment,
Reduce the tendency of cracking at generation initial stage, and damping noise reduction demand, then using the proportion scheme of high carbon and silicon equivalent when requiring dispensing,
To obtain equally distributed thick flake graphite tissue.In practical application, currently using the pig iron as the production technology of primary raw material in,
It is expected that meeting both sides above simultaneously requires using alloying measure, it is often unsatisfactory.Although because alloying passes through admittedly
It is molten to enhance matrix, improve the mechanical performance of casting on the premise of higher carbon silicon equivalent weight, but also more hinder graphite
The element influences graphite form of change, it is easy to form tiny graphite, promotes generation carbide, and the shrinkage porosite for adding casting body inclines
To easily causing quality accident.The pig iron is bought simultaneously makees raw material, it is necessary to which substantial amounts of fund and transport, storage cost, corresponding comprehensive
Close production cost higher.And in base iron contain compared with multiple types trace element and oxide, traditionally produce, it is right
Casting quality is unfavorable, and the automobile casting being made may be made to there is potential safety hazard.
The content of the invention
The purpose of the present invention, is just to provide a kind of melting technique of trunk brake hub synthetic cast iron, improves braking
The inherent quality of hub casts, improves the comprehensive mechanical performance of casting, reduces potential safety hazard, strengthens security, reduces castings production
Cost, improves economic and social benefits.
The task of the present invention is so completed：A kind of smelter for casting automobile brake hub casts synthetic cast iron of design
Skill, raw material is made using 70%-80% steel scraps and 20%-30% gray cast iron foundry returns, and selection dispensing is 1.0-1.3% carborundum, 2.0-
2.3% carburant, the sulphur iron that ferrochrome 0.35-0.45% that ferromanganese 0.6-0.8% that content is 65%, content are 60%, content are 30%
0.1-0.2%, dispensing carborundum and carburant are added in medium frequency induction melting furnace in three times, and clinker is scratched clean after furnace chargeization is clear, with poly-
Slag heat preserving agent covering molten iron surface, is warming up to 1400-1450 degree insulation Celsius, takes both analysis sample, use heat analysis iron
Water constituent management instrument is analyzed data, and adjustment controls base iron composition to the requirement for meeting thermal analyzer data target, plus
Enter load weighted ferromanganese, ferrochrome, sulphur iron, be warming up to 1450-1480 degree Celsius, molten iron is come out of the stove, by load weighted particulate when coming out of the stove
Barium ferrosilicon is added in molten iron with stream, barium ferrosilicon consumption 0.5%, during molten iron casting, is carried out using hand-held with stream cast instrument with stream
Breed, inovulant uses granularity 0.5mm Si-S inovulants, consumption 0.10-0.15%, pouring temperature is 1380-1400 Celsius
Degree, pours into a mould the time control of gray cast iron automobile brake hub casts within 15 minutes, the index of casting finished products sampling Detection meets
《Q/HDB2016-2014 brake hub finished product acceptance conditions》Regulation.It is same type of material product to make the gray cast iron foundry returns of raw material
Foundry return, including dead head, scrap casting.The requirement of thermal analyzer data target is：C content is 3.4-3.7%, and Si contents are
1.3-1.4%.The process that dispensing carborundum and carburant are added in three times is respectively：For the first time be plus during raw material with raw material together
Add, be addition in the middle of smelting process for the second time, be for the third time furnace chargeization it is clear after scratch clean and added after clinker, three charging processes it
Between interval time phase of equality it is same.《Q/HDB2016-2014 brake hub finished product acceptance conditions》Index request be：Metallographic structure
For A type graphite, graphite length is 3-5 grades, and pearlite is more than or equal to 95%, and carbide is less than or equal to 1%, casting body tensile strength
For 220-300Mpa.
Implemented according to such scheme and tested, it was demonstrated that technical scheme is reasonable in design, can be made full use of
Gray cast iron foundry return dispensing in the punching press leftover bits and pieces steel scrap and existing production process of bearing cage, improves the synthesis of casting
Mechanical performance, improves the inherent quality of casting, strengthens security, while reducing the production cost of braking hub casts, preferably
Ground has reached expected purpose.
Embodiment
The embodiment to the present invention is described further below.
The present invention makees raw material using 70%-80% steel scraps and 20%-30% gray cast iron foundry returns, and dispensing is carbonized for 1.0-1.3%
Silicon, 2.0-2.3% carburants, ferrochrome 0.35-0.45% that ferromanganese 0.6-0.8% that content is 65%, content are 60%, content are 30%
Sulphur iron 0.1-0.2%, dispensing carborundum and carburant added in medium frequency induction melting furnace in three times, and stove is scratched clean after furnace chargeization is clear
Slag, molten iron surface is covered with slag gathering heat insulating agent, is warming up to 1400-1450 degree insulation Celsius, both analysis sample is taken, with heat
Analysis hot metal composition management instrument data are analyzed, adjustment control base iron composition to meet thermal analyzer data target want
Ask, add load weighted ferromanganese, ferrochrome, sulphur iron, be warming up to 1450-1480 degree Celsius, molten iron is come out of the stove, will be load weighted when coming out of the stove
Particulate barium ferrosilicon is added in molten iron with stream, barium ferrosilicon consumption 0.5%, during molten iron casting, is carried out using hand-held with stream cast instrument
Current-following inoculation, inovulant uses granularity 0.5mm Si-S inovulants, consumption 0.10-0.15%, and pouring temperature is 1380- Celsius
1400 degree, the time control of gray cast iron automobile brake hub casts is poured into a mould within 15 minutes, the index of casting finished products sampling Detection
Meet《Q/HDB2016-2014 brake hub finished product acceptance conditions》Regulation.Make the gray cast iron foundry returns of raw material to produce for same type of material
The foundry return of product, including dead head, scrap casting.The requirement of thermal analyzer data target is：Control the C content of base iron composition
It is 1.3-1.4% for 3.4-3.7%, Si content.The process that dispensing carborundum and carburant are added in three times is respectively：It is for the first time
Plus together added with raw material during raw material, be addition in the middle of smelting process for the second time, be for the third time furnace chargeization it is clear after scratch clean after clinker
Add, the interval time phase of equality between three charging processes is same.《Q/HDB2016-2014 brake hub finished product acceptance conditions》's
Regulation is：Metallographic structure is A type graphite, and graphite length is 4-5 grades, pearlite 95-98%, carbide 1%, gray cast iron automobile brake
The tensile strength of hub casts finished product is 280-300Mpa.
Through multiple sampling and testing, chemical examination, it is according to the metallographic structure of braking hub casts made from technical scheme
Graphite A types add a small amount of C, and graphite length is 4-5 grades, and pearlite reaches 95-98%, and body hardness is HB181-200, and tension is strong
Spend for 300-344Mpa, the comprehensive mechanical performance of brake hub is stable in higher level, and indices reach or better than Shaanxi
Han De vehicle bridge Co., Ltd《Q/HDB2016-2014 brake hub finished product acceptance conditions》Regulation.Brake hub produced by the present invention
Casting is compared with the brake hub product of same quality level, and production cost per ton can reduce by 640 yuan, is braked according to producing 3000 tons per year
Hub casts are calculated, and add up to more than 1,900,000 yuan of reduction production cost every year.
The present invention is cast using the punching press leftover bits and pieces steel scrap of bearing cage manufacturer and the ash of existing same type of material product
Iron foundry return makees raw material, realizes recycling for steel scrap and foundry return, improves the inherent quality of casting, reduce raw material
Purchase, transport, carrying cost, brake hub castings production cost is reduced, with good economic and social benefits and bright
Popularizing application prospect.
Claims (5)
1. it is a kind of cast automobile brake hub casts gray cast iron smelting technology, it is characterised in that using 70%-80% steel scraps with
20%-30% gray cast iron foundry returns makees raw material, and selection dispensing is 1.0-1.3% carborundum, 2.0-2.3% carburants, and content is 65%
The sulphur iron 0.1-0.2% that ferrochrome 0.35-0.45% that ferromanganese 0.6-0.8%, content are 60%, content are 30%, dispensing carborundum and increasing
Carbon agent is added in medium frequency induction melting furnace in three times, and clinker is scratched clean after furnace chargeization is clear, and molten iron surface is covered with slag gathering heat insulating agent, is risen
Temperature takes both analysis sample to 1400-1450 degree Celsius insulation, and data are divided with heat analysis hot metal composition management instrument
Analysis, adjustment control base iron composition adds load weighted ferromanganese, ferrochrome, sulphur iron to the requirement for meeting thermal analyzer data target,
1450-1480 degree Celsius is warming up to, molten iron is come out of the stove, added load weighted particulate barium ferrosilicon in molten iron with stream when coming out of the stove, barium silicon
Iron consumption 0.5%, during molten iron casting, carries out current-following inoculation, inovulant uses granularity 0.5mm using hand-held with stream cast instrument
Si-S inovulants, consumption 0.10-0.15%, pouring temperature is 1380-1400 degree Celsius, cast gray cast iron automotive brake hub casting
The time control of part is within 15 minutes, and the index of casting finished products sampling Detection meets《Q/HDB2016-2014 brake hub finished products
Acceptance condition》Regulation.
2. the smelting technology of casting automobile brake hub casts gray cast iron according to claim 1, it is characterised in that described
The gray cast iron foundry returns for making raw material is the foundry return of same type of material product, including dead head, scraps casting.
3. the smelting technology of casting automobile brake hub casts gray cast iron according to claim 1, it is characterised in that described
The requirement of thermal analyzer data target is：C content is 3.4-3.7%, and Si contents are 1.3-1.4%.
4. the smelting technology of casting automobile brake hub casts gray cast iron according to claim 1, it is characterised in that described
Dispensing carborundum and the process that adds in three times of carburant be respectively：Together added with raw material when being and add raw material for the first time, the
Secondary is addition in the middle of smelting process, be for the third time furnace chargeization it is clear after scratch clean and added after clinker, between three charging processes between
It is same every time phase of equality.
5. the smelting technology of casting automobile brake hub casts gray cast iron according to claim 1, it is characterised in that described
《Q/HDB2016-2014 brake hub finished product acceptance conditions》Index request be：Metallographic structure is A type graphite, and graphite length is 3-
5 grades, pearlite is more than or equal to 95%, and carbide is less than or equal to 1%, and casting body tensile strength is 220-300Mpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710556089.3A CN107326138A (en) | 2017-07-10 | 2017-07-10 | A kind of smelting technology for casting automobile brake hub casts gray cast iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710556089.3A CN107326138A (en) | 2017-07-10 | 2017-07-10 | A kind of smelting technology for casting automobile brake hub casts gray cast iron |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107326138A true CN107326138A (en) | 2017-11-07 |
Family
ID=60197151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710556089.3A Pending CN107326138A (en) | 2017-07-10 | 2017-07-10 | A kind of smelting technology for casting automobile brake hub casts gray cast iron |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107326138A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109182890A (en) * | 2018-10-19 | 2019-01-11 | 中车大连机车车辆有限公司 | A kind of gray cast iron and its smelting process |
| CN109811249A (en) * | 2019-03-01 | 2019-05-28 | 广西玉柴机器股份有限公司 | A 300Mpa gray cast iron material, its production method, and a diesel engine cylinder block prepared by using the material |
| CN110983170A (en) * | 2019-11-21 | 2020-04-10 | 中国第一汽车股份有限公司 | Method for smelting heat-fatigue-resistant brake drum of commercial vehicle |
| CN111254249A (en) * | 2020-03-23 | 2020-06-09 | 苏州勤堡精密机械有限公司 | Method for producing high-strength thick gray cast iron |
| CN114262837A (en) * | 2021-12-26 | 2022-04-01 | 山西汤荣机械制造股份有限公司 | High-strength high-heat-conductivity new material solid-liquid composite brake drum and preparation method thereof |
| CN115558841A (en) * | 2022-11-30 | 2023-01-03 | 南通冠峰铸造有限公司 | Processing technology of high-strength gray iron |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109182890A (en) * | 2018-10-19 | 2019-01-11 | 中车大连机车车辆有限公司 | A kind of gray cast iron and its smelting process |
| CN109811249A (en) * | 2019-03-01 | 2019-05-28 | 广西玉柴机器股份有限公司 | A 300Mpa gray cast iron material, its production method, and a diesel engine cylinder block prepared by using the material |
| CN110983170A (en) * | 2019-11-21 | 2020-04-10 | 中国第一汽车股份有限公司 | Method for smelting heat-fatigue-resistant brake drum of commercial vehicle |
| CN111254249A (en) * | 2020-03-23 | 2020-06-09 | 苏州勤堡精密机械有限公司 | Method for producing high-strength thick gray cast iron |
| CN114262837A (en) * | 2021-12-26 | 2022-04-01 | 山西汤荣机械制造股份有限公司 | High-strength high-heat-conductivity new material solid-liquid composite brake drum and preparation method thereof |
| CN114262837B (en) * | 2021-12-26 | 2022-06-24 | 山西汤荣机械制造股份有限公司 | Solid-liquid composite brake drum of high strength and high thermal conductivity material and preparation method thereof |
| CN115558841A (en) * | 2022-11-30 | 2023-01-03 | 南通冠峰铸造有限公司 | Processing technology of high-strength gray iron |
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