CN104195423B - The low silicon of high-carbon is containing niobium cast iron brake disk and preparation method thereof - Google Patents
The low silicon of high-carbon is containing niobium cast iron brake disk and preparation method thereof Download PDFInfo
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- CN104195423B CN104195423B CN201410494930.7A CN201410494930A CN104195423B CN 104195423 B CN104195423 B CN 104195423B CN 201410494930 A CN201410494930 A CN 201410494930A CN 104195423 B CN104195423 B CN 104195423B
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Abstract
The present invention relates to a kind of brake disc, be specifically related to a kind of low silicon of high-carbon containing niobium cast iron brake disk and preparation method thereof.Being made up of the chemical composition of following percetage by weight: carbon 3.6 3.9%, silicon 1.4 1.7%, manganese 0.6 1.0%, chromium 0.10 0.45%, copper 0.3 0.6%, niobium 0.1 0.3%, < < 0.02%, remaining is iron to phosphorus for 0.05%, S.The brake disc prepared has good thermal conductivity, elevated temperature strength, high temperature abrasion resistance and thermal fatigue resistance, is remarkably improved braking safety and service life；The present invention also provides for its preparation method, rational technology.
Description
Technical field
The present invention relates to a kind of brake disc, be specifically related to a kind of low silicon of high-carbon containing niobium cast iron brake disk and preparation method thereof.
Background technology
The most basic function of brake disc is to absorb braking kinetic energy and it is converted into heat energy is dispersed in air, is to ensure that automotive safety
Key factor.When other safety measures break down, it is the last guarantee of safe and reliable braking.Therefore, innovation is with excellent
Change brake disc structure, increase substantially brake disc and material thermal resistance energy, anti-fatigue performance, there is the biggest actual application value.
According to the application conditions of brake disc, it is anti-that its material must possess good recovery electric heating system and thermal conductivity, enough intensity are become reconciled
Thermal fatigue, anti-wear performance are good and shock resistance is good.The disc material used and studying mainly has cast iron and Metal Substrate
The big class of composite two.It is relatively low that casting pig has certain intensity and wearability, raw material and manufacturing cost, becomes brake disc
Main the selection of material, the most most widely used cast iron materials mainly has HT250, HT200.But it is reasonable for tradition casting pig
Controlling carbon equivalent is a critically important factor, and carbon equivalent is too low can improve intensity and hardness, but cutting ability is poor；And it is high
The intensity of carbon equivalent cast iron is relatively low, but has preferable machining property, higher damping performance and good heat-conductive characteristic.
In the case of high-carbon low silicon cast iron brake disk Han niobium described in this patent can ensure that carbon equivalent high, cast iron brake disk obtains good combining
Close performance.
Summary of the invention
For the deficiencies in the prior art, it is an object of the invention to provide a kind of high-carbon low silicon cast iron brake disk Han niobium, have good
Thermal conductivity, elevated temperature strength, high temperature abrasion resistance and thermal fatigue resistance, be remarkably improved braking safety and service life；This
The bright its preparation method that also provides for, rational technology.
High-carbon of the present invention low silicon cast iron brake disk Han niobium, is made up of the chemical composition of following percetage by weight:
Carbon 3.6-3.9%, silicon 1.4-1.7%, manganese 0.6-1.0%, chromium 0.10-0.45%, copper 0.3-0.6%, niobium 0.1-0.3%, phosphorus < 0.05%,
S < 0.02%, remaining is iron.
Carbon is that graphite forms element, and C content height is conducive to improving thermal conductivity, but flat spot (graphite floatation) occurs in Tai Gaoyi,
So carbon is 3.6-3.9%.
Silicon is graphitizing element, is conducive to eliminating free cementite, but the highest reduction content of pearlite in alloy, reduces intensity and wear-resisting
Property, so silicone content is 1.4-1.7%.
Manganese promotes that pearlite is formed, easy segregation, and plasticity reduces, therefore Fe content controls at 0.6-1.0%.
Chromium improves content of pearlite in alloy, makes the cementite in pearlite become the cementite Fe containing chromium (Cr)3C, improves heat endurance, but
It is if Fe content is too many, can promote that free cementite is formed, therefore chromium content is 0.10-0.45%.
Copper increases content of pearlite in alloy, improves intensity, hardness, and improves wearability.
Niobium refinement graphite structure, improves the intensity of carbon equivalent high cast iron, hardness, improves toughness.Content of niobium is too low, and graphite is thick,
Intensity, hardness are low；Content of niobium is too high, separates out rich niobium phase, and production cost is too high, so content of niobium is 0.1-0.3%.
Sulphur, phosphorus impurities element should reduce its content as far as possible.
Containing mass percent 0.1-0.45% chromium, 0.3-0.6% copper, the alloying element of 0.1-0.3% niobium, to carry heavy alloyed high temperature
Structure stability.
The described high-carbon low silicon preparation method containing niobium cast iron brake disk, comprises the following steps:
(1) with magnesium iron, steel scrap, ferromanganese, ferrosilicon, ferrochrome, ferro-niobium and copper coin as raw material, all raw materials are mixed, in
Frequently induction furnace melting；
(2) cast is processed bag baking, then random inoculant, mould cavity inoculation agent and compacted iron filings are placed in the tamping of the bag end；
(3) use the method that pours to be poured into by the melting liquid after intermediate frequency furnace melting melting cast that step (2) obtains process wrap into
Row current-following inoculation and mould cavity inoculation；Then pour into a mould, obtain brake disc.
In step (1), the temperature of intermediate frequency furnace is 1450-1500 DEG C.
In step (2), random inoculant is Antaciron, and addition is the 0.2-0.4% of the weight of melting liquid.
Antaciron is silicon 70-74%, calcium 0.5-1%, aluminium 1-1.5%, barium 0.1-0.5%, and surplus is iron and impurity.
The medium-sized interior inovulant of step (2) is: silicozirconium, and addition is the 0.05-0.1% of melting liquid weight.
Silicozirconium is: zirconium 4-4.5%, silicon 70-75%, calcium 0.2-1.6%, and surplus is iron and impurity.
The addition of compacted iron filings is the 0.5-1.0% of melting liquid weight.
The pouring temperature of step (3) is 1350-1400 DEG C.
The graphite form of described brake disc is more than 90% for A type graphite, and remaining is c-type graphite, matrix pearlite > 95%,
Iron phosphide eutectic < 1%, carbide < 3%.
In sum, the invention have the advantages that
(1) mechanical property of described brake disc: hot strength 250-300MPa, hardness 180-240HBW,
(2) brake disc prepared by the present invention has good thermal conductivity, elevated temperature strength, high temperature abrasion resistance and thermal fatigue resistance,
It is remarkably improved braking safety and service life.
(3) present invention also provides for its preparation method, rational technology.
Detailed description of the invention
Below in conjunction with embodiment, the present invention will be further described.
Embodiment 1
A kind of high-carbon low silicon cast iron brake disk Han niobium: weight percent is configured to following components: carbon 3.8%, silicon 1.5%, manganese
0.8%, chromium 0.25%, copper 0.30%, niobium 0.15%, surplus is iron and inevitable impurity.
Preparation method is as follows: magnesium iron, steel scrap, ferromanganese, ferrosilicon, ferrochrome, ferro-niobium and copper coin are mixed, at medium-frequency induction furnace
Middle melting, temperature is 1480 DEG C, carries out inoculation, and inoculation uses current-following inoculation and mould cavity inoculation late inoculation technique,
Random inoculant is Antaciron, and addition is the 0.30% of iron liquid quality, and mould cavity inoculation agent is silicozirconium, and addition is
0.06%, the addition of compacted iron filings is the 0.8% of melting liquid weight.After medium-frequency induction furnace melting liquid components tests is qualified, then
Pouring into a mould, pouring temperature is 1380 DEG C, obtains the foundry goods of regulation shape, and the sand in foundry goods and the filling sand in sandbox are cleared up
Totally, brake disc of the present invention is i.e. obtained.
Wherein: Antaciron is: silicon 72.6%, calcium 0.6%, aluminium 1.1%, barium 0.2%, surplus is iron and impurity.
Silicozirconium is: zirconium 4.3%, silicon 71.5%, calcium 1.5%, and surplus is iron and impurity.
The metallographic structure of the brake disc that embodiment 1 prepares is: A type graphite 94% adds a small amount of c-type graphite 6%, matrix group
Knit pearlite 95%.
Brake disc and HT250 to embodiment 1 preparation carry out performance test:
Table 1 is brake disc and HT250 the change table of intensity and tissue, table 2 after different heat treatment technique of embodiment 1 preparation
For brake disc and the thermal fatigue property table of HT250 of embodiment 1 preparation, hot fatigue performance test is 700 DEG C × 5min water-cooled.
Other results of property of brake disc of embodiment 1 preparation is shown in Table 3, table 4.
The brake disc of table 1 embodiment 1 preparation and HT250 change table of intensity and tissue after different heat treatment technique
The brake disc of table 2 embodiment 1 preparation and the thermal fatigue property table of HT250
Embodiment 2
A kind of high-carbon low silicon cast iron brake disk Han niobium: weight percent is configured to following components: carbon 3.6%, silicon 1.7%, manganese
0.6%, chromium 0.45%, copper 0.30%, niobium 0.30%, surplus is iron and inevitable impurity.
Preparation method is as follows: magnesium iron, steel scrap, ferromanganese, ferrosilicon, ferrochrome, ferro-niobium and copper coin are mixed, at medium-frequency induction furnace
Middle melting, temperature is 1450 DEG C, carries out inoculation, and inoculation uses current-following inoculation and mould cavity inoculation late inoculation technique,
Random inoculant is Antaciron, and addition is the 0.2% of iron liquid quality, and mould cavity inoculation agent is silicozirconium, and addition is 0.10%,
The addition of compacted iron filings is the 0.5% of melting liquid weight.After medium-frequency induction furnace melting liquid components tests is qualified, then pour into a mould,
Pouring temperature is 1390 DEG C, obtains the foundry goods of regulation shape, and the sand in foundry goods and the filling sand in sandbox are cleaned out, i.e.
Obtain brake disc of the present invention.
Wherein: Antaciron is silicon 70%, calcium 1%, aluminium 1%, barium 0.5%, surplus is iron and impurity.
Silicozirconium is zirconium 4%, silicon 75%, calcium 0.2%, and surplus is iron and impurity.
The metallographic structure of the brake disc that embodiment 2 prepares is: A type graphite 96% adds a small amount of c-type graphite 4%, matrix group
Knit pearlite 96%.
The results of property of brake disc of embodiment 2 preparation is shown in Table 3, table 4.
Embodiment 3
A kind of high-carbon low silicon cast iron brake disk Han niobium: weight percent is configured to following components: carbon 3.9%, silicon 1.4%, manganese
1.0%, chromium 0.10%, copper 0.60%, niobium 0.10%, surplus is iron and inevitable impurity.
Preparation method is as follows: magnesium iron, steel scrap, ferromanganese, ferrosilicon, ferrochrome, ferro-niobium and copper coin are mixed, at medium-frequency induction furnace
Middle melting, temperature is 1490 DEG C, carries out inoculation, and inoculation uses current-following inoculation and mould cavity inoculation late inoculation technique,
Random inoculant is Antaciron, and addition is the 0.4% of iron liquid quality, and mould cavity inoculation agent is silicozirconium, and addition is 0.05%,
The addition of compacted iron filings is the 1.0% of melting liquid weight.After medium-frequency induction furnace melting liquid components tests is qualified, then pour into a mould,
Pouring temperature is 1350 DEG C, obtains the foundry goods of regulation shape, the sand in foundry goods and the filling sand in sandbox is cleaned out, to obtain final product
To brake disc of the present invention.
Wherein: Antaciron is silicon 74%, calcium 0.5%, aluminium 1.5%, barium 0.1%, surplus is iron and impurity.
Silicozirconium is zirconium 4.5%, silicon 70%, calcium 1.6%, and surplus is iron and impurity.
The metallographic structure of the brake disc that embodiment 1 prepares is: A type graphite 95% adds a small amount of c-type graphite 5%, matrix group
Knit pearlite 97%.
The results of property of brake disc of embodiment 3 preparation is shown in Table 3, table 4.
Table 3 is the performance table of brake disc obtained by embodiment 1-3:
The results of property of brake disc obtained by table 3 embodiment 1-3
The heat conductivility of brake disc obtained by embodiment 1-3 is as shown in table 4.
The thermal conductivity factor of brake disc obtained by table 4 embodiment 1-3
Claims (6)
1. high-carbon low silicon cast iron brake disk Han niobium, it is characterised in that: it is made up of the chemical composition of following percetage by weight:
Carbon 3.6-3.9%, silicon 1.4-1.7%, manganese 0.6-1.0%, chromium 0.10-0.45%, copper 0.3-0.6%, niobium 0.1-0.3%, < < 0.02%, remaining is iron to phosphorus for 0.05%, S；
The described high-carbon low silicon preparation method containing niobium cast iron brake disk, comprises the following steps:
(1) with magnesium iron, steel scrap, ferromanganese, ferrosilicon, ferrochrome, ferro-niobium and copper coin as raw material, all raw materials are mixed, in intermediate frequency furnace melting；
(2) cast is processed bag baking, then random inoculant, mould cavity inoculation agent and compacted iron filings are placed in the tamping of the bag end；
(3) use the method that pours to be poured into by the melting liquid after intermediate frequency furnace melting cast that step (2) obtains processes bag and carries out current-following inoculation and mould cavity inoculation；Then pour into a mould, obtain brake disc；
In step (2), random inoculant is Antaciron；
Antaciron is silicon 70-74%, calcium 0.5-1%, aluminium 1-1.5%, barium 0.1-0.5%, and surplus is iron and impurity；
The medium-sized interior inovulant of step (2) is: silicozirconium；
Silicozirconium is: zirconium 4-4.5%, silicon 70-75%, calcium 0.2-1.6%, and surplus is iron and impurity；
The graphite form of described brake disc is more than 90% for A type graphite, and remaining is c-type graphite, matrix pearlite>95%, iron phosphide eutectic<1%, carbide<3%.
High-carbon the most according to claim 1 low silicon cast iron brake disk Han niobium, it is characterised in that: in step (1), the temperature of intermediate frequency furnace is 1450-1500 DEG C.
High-carbon the most according to claim 1 low silicon cast iron brake disk Han niobium, it is characterised in that: in step (2), random inoculant addition is the 0.2-0.4% of the weight of melting liquid.
High-carbon the most according to claim 1 low silicon cast iron brake disk Han niobium, it is characterised in that: the medium-sized interior innoculant adding quantity of step (2) is the 0.05-0.1% of melting liquid weight.
High-carbon the most according to claim 1 low silicon cast iron brake disk Han niobium, it is characterised in that: the addition of compacted iron filings is the 0.5-1.0% of melting liquid weight.
High-carbon the most according to claim 1 low silicon cast iron brake disk Han niobium, it is characterised in that: the pouring temperature of step (3) is 1350-1400 DEG C.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| IT201900012738A1 (en) * | 2019-07-24 | 2021-01-24 | Freni Brembo Spa | CAST IRON, ESPECIALLY FOR DISC BRAKE COMPONENTS |
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| CN104480371B (en) * | 2014-12-24 | 2016-08-24 | 宁波市鄞州商业精密铸造有限公司 | A kind of wearability ferroalloy preparation method |
| CN107345285A (en) * | 2016-05-05 | 2017-11-14 | 通富热处理(昆山)有限公司 | Automobile brake disc alloy gray cast-iron material, automobile brake disc and preparation method thereof |
| CN106756448B (en) * | 2016-12-13 | 2019-03-26 | 湖北金麟机械制造有限公司 | Junked-auto components, iron filings recycle production High-Strength Low-Alloy brake drum |
| CN106929750B (en) * | 2017-05-13 | 2018-12-28 | 山东宏马工程机械有限公司 | Compacted iron brake drum and preparation method thereof |
| CN108315633B (en) * | 2018-01-26 | 2020-10-30 | 清华大学 | Gray cast iron with high heat conductivity and high strength and preparation method thereof |
| 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 |
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| DE19545611C1 (en) * | 1995-12-07 | 1997-03-13 | Daimler Benz Ag | Cast iron alloy is used for casting blanks for disc brakes for vehicles |
| GB9718982D0 (en) * | 1997-09-09 | 1997-11-12 | T & N Technology Ltd | Disc brake rotor |
| CN101418413B (en) * | 2008-09-24 | 2010-12-01 | 上海大学 | Niobium alloy cast iron brake disk material and technique for producing the same |
| ITBS20100196A1 (en) * | 2010-12-02 | 2012-06-03 | Freni Brembo Spa | CAST IRON, IN PARTICULAR FOR DISC BRAKE COMPONENTS |
| CN102071352A (en) * | 2011-01-17 | 2011-05-25 | 重庆大学 | Vanadium-titanium vermicular cast iron brake drum and preparation method thereof |
| CN102676912A (en) * | 2012-05-30 | 2012-09-19 | 河南中原吉凯恩气缸套有限公司 | Low-carbon and low-silicon cylinder sleeve and preparation method thereof |
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| CN103225037B (en) * | 2013-05-28 | 2015-09-09 | 夏邑县淮海铸造有限公司 | High-carbon gray cast iron automobile brake disk and production method thereof |
| CN103343279B (en) * | 2013-06-28 | 2015-11-18 | 上海圣德曼铸造有限公司 | A kind of bent axle as-cast pearlitic ductile iron material and preparation method thereof |
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| CN103509992A (en) * | 2013-10-15 | 2014-01-15 | 沈阳工业大学 | Study and preparation of heat-resistant nodular cast iron |
| CN103834852A (en) * | 2014-03-19 | 2014-06-04 | 四川大学 | Tin and niobium composite alloying gray pig iron and production process thereof |
| CN103952621B (en) * | 2014-05-26 | 2016-08-24 | 陈国� | A kind of vanadium titanium casting pig and production technology thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT201900012738A1 (en) * | 2019-07-24 | 2021-01-24 | Freni Brembo Spa | CAST IRON, ESPECIALLY FOR DISC BRAKE COMPONENTS |
| WO2021014404A1 (en) * | 2019-07-24 | 2021-01-28 | Freni Brembo S.P.A. | Cast iron, in particular for components of disc brakes |
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Denomination of invention: High carbon low silicon niobium bearing cast iron brake disc and its preparation method Effective date of registration: 20220927 Granted publication date: 20160907 Pledgee: Zibo Boshan District sub branch of Postal Savings Bank of China Pledgor: SHANDONG HONGMA ENGINEERING MACHINERY Co.,Ltd. Registration number: Y2022980016427 |
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