CN106048399A - Microalloying gray cast iron clutch pressure plate material and preparation method thereof - Google Patents
Microalloying gray cast iron clutch pressure plate material and preparation method thereof Download PDFInfo
- Publication number
- CN106048399A CN106048399A CN201610415659.2A CN201610415659A CN106048399A CN 106048399 A CN106048399 A CN 106048399A CN 201610415659 A CN201610415659 A CN 201610415659A CN 106048399 A CN106048399 A CN 106048399A
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- microalloying
- clutch
- compressing disc
- casting pig
- cast iron
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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
- 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
-
- 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
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Operated Clutches (AREA)
Abstract
The invention relates to a microalloying gray cast iron clutch pressure plate material and a preparation method thereof. The microalloying gray cast iron clutch pressure plate material is composed of, by mass, 3.5%-3.9% of C, 2.2%-2.7% of Si, 0.4%-1.5% of Mn, 0-0.1% of P, 0.06%-0.10% of S, 0.2 %-0.4% of Cr, 0.4%-0.7% of Cu, 0.1%-0.4% of V and the balance Fe. The preparation method comprises the step of compound inoculation treatment of silicon barium and silicon iron. The microalloying gray cast iron clutch pressure plate material is high in toughness, good in heat resistance and excellent in casting performance, and a clutch pressure plate produced through gray cast iron which replaces universally adopted gray cast iron at present meet the development requirements of clutches and even engines in the direction of high efficiency, energy saving and emission reduction and has good application prospects.
Description
Technical field
The invention belongs to clutch compressing disc field, particularly to a kind of microalloying casting pig clutch compressing disc material and
Preparation method.
Background technology
Clutch compressing disc is one of key components and parts of clutch, makes pressure under the action of the spring during clutch compressing disc work
Dish is combined with friction plate, makes engine power pass to change speed gear box.When needs clutch separation, separate lever and pull clutch
Platen, overcomes spring active force on pressing plate, makes platen separate with friction plate.Clutch compressing disc passes through hydraulic pressure or machine driving
Whether operation clutch compressing disc combines with flywheel, and the power of electromotor is passed to variator.Let slip the clutch, clutch pressure
Dish leaves flywheel, cuts off the transmission of power.Lift clutch pedal clutch compressing disc and flywheel compresses transmission power.
The sliding wear of clutch's jointing process is its most important characteristic, and it causes platen and friction plate temperature to raise, and causes
The friction point of platen and friction plate contact surface produces many small thermals source, and constantly platen and rubbing surface is inputted hot-fluid.Defeated
The hot-fluid entered causes making engaging zones temperature raise, and makes inside platen owing to each several part non-uniform temperature produces internal stress, when interior
Stress increases to material yield point will produce permanent deformation, even make part failure.
Press plate structure great majority are the foundry goods of ring discoid, and clutch comes closely coupled with electromotor by platen element.
Test shows, the abrasion of friction plate is to increase with the rising of platen temperature, when platen working surface is more than 180-200 DEG C
Time, friction disc wear sharply increases.The clutch compressing disc that normal condition uses, the transient temperature of working surface not can exceed that 180
℃.Under the conditions of using the most frequently, the transient temperature of platen surface likely reaches 1000 DEG C.Too high temperature can make pressure
Dish cracks even fragmentation in pressurized process.For making the friction surface temperature will not be too high, it is desirable to platen has sufficiently large matter
Measure to ensure to have enough thermal capacity.
In use for some time, platen working environment can cause working face to wear and tear, abrade, burn to clutch compressing disc
Lose, rupture and buckling deformation.Simultaneously because territory of use's road conditions is severe, driver may need frequent operation clutch,
Make clutch frequently engage separation generation sliding wear and cause high temperature.The temperature of friction surface accumulation has little time to disperse and causes local temperature
Higher, even make part failure.Or cause clutch repeatedly to engage separation, under the heat that last round of joint produces also does not disperses
One takes turns joint, and oneself starts again at so that clutch heat load is very big, and under limit severe duty, its tensile strength is not enough to bear
Load causes its premature failure too.If skidding or separation not thorough fault occurs in clutch, make again platen temperature distortion
Or uneven wear.When after platen buckling deformation, friction plate can only contact with platen portion, such contact surface reduces, and transmits torque
Difficulty, is more easy to skid.
The most serious part that is heated in clutch is platen, the thermal deformation that clutch compressing disc occurs in actually used situation
Problem makes platen produce axial deformation mainly due to non-uniform temperature, and the pressure plate friction surfaces after deformation is tapered, so that
Its friction area and operating radius reduce, thus affect the ability of its transmission torque.
Therefore, clutch compressing disc should have good thermal conduction, higher coefficient of friction, and greater stiffness and flywheel should keep good
Good centering, and static balance to be carried out, the balance quality of platen single-piece should be not less than the performances such as 15～20g cm and meet clutch
Device and the demand of Hyundai Motor development.
Existing platen material typically uses casting pig, such as HT200, HT250, HT300.Additionally can add a small amount of alloy unit
Element is if nickel, ferrum, manganese etc. are to strengthen its mechanical strength.Graphite flake in casting pig has cutting metallic matrix, destroys its seriality, fall
The effect of its intensity low, should avoid producing long and thin graphite flake and thick graphite flake.The graphite flake of high-quality platen foundry goods should
For A type and be uniformly distributed in metallic matrix, matrix should all pearlite, pearlite also should be tiny and uniform.Pressure
Dish production method is casting, and it is to become meet necessarily required melt and water into casting mold after melt treatment by Metal Melting
In, cooled solidification, finishing obtain the technical process having the foundry goods of reservation shape, size and performance after processing.Its quality is general
Depend on the process procedures such as pouring procedure, molding sand process parameter, melt treatment, if the surface roughness of pressure plate friction surfaces is relatively big,
Rubbing surface hardness is uneven, and partial frictional field strength may be made thermal deformation occur not.
Often in heat exhaustion and thermal shock during clutch work, the peak stress under medium load operating mode is own through exceeding
The fatigue stress limits of HT25O (fatigue limit≤127MPa of HT25O).Therefore the increasing of separation number of times is engaged along with clutch
Many, thermal stress circulation easily accumulation plastic deformation damages and causes platen thermoelasticity unstability, finally makes platen fire check occur.
Even if this explanation is in the case of carload is little, the hot-fluid that now separation of clutch joint once produces will not be the biggest.But
Being if repeatable operation clutch, along with engaging the increase separating number of times, platen heats up cooling repeatedly, and corresponding Cyclic Stress is secondary
Number increases, and plastic deformation damage accumulation will cause platen to produce fatigue fever crackle, and this alternating thermal stress easilys lead to platen
Thermoelasticity unstability, finally make platen premature deterioration.
Generally speaking, during clutch sliding wear, fricative heat flows into flywheel, friction plate and platen.Heat continuous
Flow into so that the temperature of platen raises, produce thermal deformation.The improvement direction of press plate structure be make structure simplify, compact, be easy to lead to
With, increase thermal capacity, improve serviceability and service life, it is simple to dismount and adjustment etc..
Gray cast iron material owing to having good obdurability, thermostability, casting character and damping characteristics, always from
The ideal material of clutch platen.But along with the development of modern clutch, thermic load and mechanical load that clutch is born are continuous
Improve.Not only require that platen material has good obdurability, thermostability and fatigue resistance, it is also desirable to have more excellent heat conduction
Performance, the thermal stress caused due to hot-spot with alleviation, meet the heat exhaustion demand that frequent thermal shock is brought.Visible, mesh
Front used gray cast iron material cannot meet the heavy-duty car of the requirement of designer, particularly high-power the most
The growth requirement of clutch and the demand of client.
Clutch selects the main starting point of material to be high intensity, high tenacity, high heat conduction, hot-cracking resistance, wearability, excellent
Good fatigue behaviour and lightweight.
Summary of the invention
The technical problem to be solved is to provide a kind of microalloying casting pig clutch compressing disc material and system thereof
Preparation Method, this material has relatively high obdurability, good heat-resistant quality and excellent casting character, uses the ash casting of the present invention
Ferrum replace the clutch compressing disc that the most commonly used casting pig produces meet clutch or even electromotor to efficient, energy-conservation, subtract
The direction of row is developed, and has a good application prospect.
A kind of microalloying casting pig clutch compressing disc material of the present invention, described material by mass percentage, by following
Component forms: C 3.5～3.9%, Si 2.2～2.7%, Mn 0.4～1.5%, P≤0.1%, S 0.06～0.10%, Cr
0.2～0.4%, Cu 0.4～0.7%, V 0.1～0.4%, Sb 0.03%～0.05%, surplus is Fe.
Preferably, described material is by mass percentage, composed of the following components: C 3.5%, Si 2.3%, Mn 0.4%,
P 0.08%, S 0.06%, Cr 0.3%, Cu 0.5%, V 0.2%, Sb 0.04%, surplus is Fe.
Preferably, described material is by mass percentage, composed of the following components: C 3.6%, Si 2.3%, Mn 0.5%,
P 0.1%, S 0.07%, Cr 0.3%, Cu 0.5%, V 0.2%, Sb 0.04%, surplus is Fe.
Preferably, described material is by mass percentage, composed of the following components: C 3.8%, Si 2.4%, Mn 0.6%,
P 0.1%, S 0.06%, Cr 0.25%, Cu 0.6%, V 0.3%, Sb 0.04%, surplus is Fe.
A kind of preparation method of the microalloying casting pig clutch compressing disc material of the present invention, including:
Use silicon barium, ferrosilicon Complex inoculation method, breed in first wrapping with 75SiFe inovulant, then add with stream
SiBa inovulant processes, and obtains microalloying casting pig clutch compressing disc material；Wherein, melt melting and the condition of process
For: smelting temperature 1500 DEG C, melt treatment temperature 1450～1480 DEG C, pouring temperature 1360～1400 DEG C.
Addition is material gross mass the 0.2～0.6% of described SiBa inovulant；The addition of 75SiFe inovulant is
The 0.3～0.8% of material gross mass.
The casting pig of the present invention:
Metallographic structure: flake graphite, A type, matrix, pearlite >=80%.
Mechanical performance: tensile strength >=240MPa, hardness >=215, elongation percentage >=1.5%.
Physical property: heat conductivity >=50W/m K, coefficient of friction >=0.72.
The casting pig of the present invention be on the basis of original gray iron through the modified one of microalloying based on Fe, C, Si
Multicomponent alloy, fundamental tissue is mainly A type graphite, pearlite plus matrix more than 80%.
Carbon and silicon are all to strongly facilitate graphited element.Therefore, carbon is to control structure of cast iron and performance with the content of silicon
One of basic parameter.
Chromium: in high-strength gray cast iron, it can refine graphite, refinement pearlite, improve intensity and hardness, and chromium should be less than
0.3%, preferably 0.15～0.25%.
Manganese: manganese can be effectively reduced austenite eutectic transformation temperature, is extremely favourable to obtain fine and closely woven pearlite.Manganese is formed and closes
The ability of gold cementite is less than chromium, and manganese has desulfidation, a small amount of manganese to there is no the danger of spoken parts in traditional operas, is conducive on the contrary refining stone
Ink.
Antimony: the effect of antimony stabilizing pearlite doubles stannum.Antimony has the tendency making flake graphite refinement and shortening.In gray iron
Intensity and wearability can be improved when adding antimony 0.03%～0.05%.Antimony can be reduced or eliminated ferrite and be formed, stable refinement
Pearlite, improves intensity and hardness.
Vanadium: can refine graphite, refinement pearlite, hinder graphitization, promote that cementite is formed, it can improve intensity with hard
Degree, raising impact flexibility.
Copper: weak graphite element, can refine graphite, refinement pearlite, improve intensity and hardness.
Clutch compressing disc, does not require nothing more than good mechanical property, also should have higher heat conductivity, so can make
The heat of the generation during must being on active service quickly is led away, it is ensured that workpiece properly functioning.The heat conductivity of the casting pig of the present invention
Can be with metallic matrix, the chemical composition of material, the shape of graphite, size and much relations are distributed.At cast iron materials each group
In knitting, the heat conductivility due to graphite is more much higher than matrix, and Thermal Conductivity of Cast Irons can be affected by the form of graphite, size, quantity
Greatly.
Beneficial effect
(1) the general casting pig of the strength ratio of the casting pig of the present invention improves more than 20%, and yield strength improves more than 15%；
Reducing deformation, reduce vibration, its result is easy to lightweight；Owing to A type graphite form makes to which reduce the generation of crackle and extension,
Thus the raising more than 10% of the more general casting pig of its fatigue strength.
(2) casting pig of the present invention has good wearability, shows the comprehensive heat-resistant anti-fatigue performance more excellent than gray iron,
The most particularly suitable manufacture clutch compressing disc.Its wearability is higher than general casting pig by 20%～40%.
(3) casting pig of the present invention has relatively high obdurability, good heat-resistant quality and excellent casting character, uses
The casting pig of the present invention replace the clutch compressing disc that the most commonly used casting pig produces meet clutch or even electromotor to
Efficiently, energy-conservation, reduce discharging direction develop, have a good application prospect.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is expanded on further.Should be understood that these embodiments are merely to illustrate the present invention
Rather than restriction the scope of the present invention.In addition, it is to be understood that after having read the content that the present invention lectures, people in the art
The present invention can be made various changes or modifications by member, and these equivalent form of values fall within the application appended claims equally and limited
Scope.
Embodiment 1
Chemical composition: C 3.5%, Si 2.3%, Mn 0.4%, P 0.08%, S 0.06%, Cr 0.3%,
Cu0.5%, V0.2%, Sb 0.04%, surplus is Fe.
Melt melting and process: smelting temperature 1500 DEG C, melt treatment temperature 1460 DEG C, pouring temperature 1390 DEG C, use
Silicon barium, ferrosilicon Complex inoculation technology, SiBa inovulant: addition 0.3%；75SiFe inovulant: addition 0.5%.
Metallographic structure: quasiflake graphite, nodulizing rate 80%, matrix, pearlite 86%.
Mechanical performance: tensile strength 262MPa, hardness 231, elongation percentage 1.7%, room temperature fatigue behaviour 200MPa (1 × 107
Secondary).
Physical property: heat conductivity 52W/m K, coefficient of friction 0.72.
Embodiment 2
Chemical composition: C 3.6%, Si 2.3%, Mn 0.5%, P 0.1%, S 0.07%, Cr 0.3%, Cu0.5%,
V0.2%, Sb 0.04%, surplus is Fe.
Melt melting and process: smelting temperature 1500 DEG C, melt treatment temperature 1460 DEG C, pouring temperature 1390 DEG C, use
Silicon barium, ferrosilicon Complex inoculation technology, SiBa inovulant: addition 0.4%；75SiFe inovulant: addition 0.5%.
Metallographic structure: quasiflake graphite, nodulizing rate 87%, matrix, pearlite 85%.
Mechanical performance: tensile strength 271MPa, hardness 235, elongation percentage 1.6%, room temperature fatigue behaviour 208MPa (1 × 107
Secondary).
Physical property: heat conductivity 52W/m K, coefficient of friction 0.76.
Embodiment 3
Chemical composition: C 3.8%, Si 2.4%, Mn 0.6%, P 0.1%, S 0.06%, Cr 0.25%,
Cu0.6%, V0.3%, Sb 0.04%, surplus is Fe.
Melt melting and process: smelting temperature 1500 DEG C, melt treatment temperature 1460 DEG C, pouring temperature 1390 DEG C, use
Silicon barium, ferrosilicon Complex inoculation technology, SiBa inovulant: addition 0.5%；75SiFe inovulant: addition 0.5%.
Metallographic structure: quasiflake graphite, nodulizing rate 89%, matrix, pearlite 88%.
Mechanical performance: tensile strength 280MPa, hardness 245, elongation percentage 1.5%, room temperature fatigue behaviour 210MPa (1 × 107
Secondary).
Physical property: heat conductivity 55W/m K, coefficient of friction 0.78.
Claims (6)
1. a microalloying casting pig clutch compressing disc material, it is characterised in that: described material by mass percentage, by following
Component forms: C 3.5～3.9%, Si 2.2～2.7%, Mn 0.4～1.5%, P≤0.1%, S 0.06～0.10%, Cr
0.2～0.4%, Cu 0.4～0.7%, V 0.1～0.4%, surplus is Fe.
A kind of microalloying casting pig clutch compressing disc material the most according to claim 1, it is characterised in that: described material
By mass percentage, composed of the following components: C 3.5%, Si 2.3%, Mn 0.4%, P 0.08%, S 0.06%, Cr
0.3%, Cu 0.5%, V 0.2%, surplus is Fe.
A kind of microalloying casting pig clutch compressing disc material the most according to claim 1, it is characterised in that: described material
By mass percentage, composed of the following components: C 3.6%, Si 2.5%, Mn 0.5%, P 0.1%, S 0.07%, Cr
0.3%, Cu 0.5%, V 0.2%, surplus is Fe.
A kind of microalloying casting pig clutch compressing disc material the most according to claim 1, it is characterised in that: described material
By mass percentage, composed of the following components: C 3.8%, Si 2.6%, Mn 0.6%, P 0.1%, S 0.06%, Cr
0.25%, Cu 0.6%, V 0.3%, surplus is Fe.
5. a preparation method for microalloying casting pig clutch compressing disc material as claimed in claim 1, including:
Use silicon barium, ferrosilicon Complex inoculation method, add SiBa inovulant after being mixed in proportion raw material and 75SiFe breeds
Agent carries out melt melting and process, obtains microalloying casting pig clutch compressing disc material；Wherein, melt melting and the bar of process
Part is: smelting temperature 1500 DEG C, melt treatment temperature 1450～1480 DEG C, pouring temperature 1360～1400 DEG C.
The preparation method of a kind of microalloying casting pig clutch compressing disc material the most according to claim 5, its feature exists
In: addition is material gross mass the 0.2～0.6% of described SiBa inovulant；The addition of 75SiFe inovulant is material
The 0.3～0.8% of gross mass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610415659.2A CN106048399A (en) | 2016-06-14 | 2016-06-14 | Microalloying gray cast iron clutch pressure plate material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610415659.2A CN106048399A (en) | 2016-06-14 | 2016-06-14 | Microalloying gray cast iron clutch pressure plate material and preparation method thereof |
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| CN106048399A true CN106048399A (en) | 2016-10-26 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107755623A (en) * | 2017-10-27 | 2018-03-06 | 湖州正德轻工机械有限公司 | Automobile clutch pressure plate casting method |
| CN109014048A (en) * | 2018-10-19 | 2018-12-18 | 淄柴动力有限公司 | The casting production process and device of boron cast iron cylinder sleeve |
| CN114150214A (en) * | 2021-12-13 | 2022-03-08 | 东港市辽成机械有限公司 | HT200 gray cast iron and manufacturing method thereof |
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| JP2005082869A (en) * | 2003-09-10 | 2005-03-31 | Hino Motors Ltd | Material of rotor for disc brake |
| CN101210296A (en) * | 2007-12-21 | 2008-07-02 | 盐城多为集团有限公司 | Low-chromium copper alloy gray cast iron and preparation method thereof |
| CN102925784A (en) * | 2012-10-21 | 2013-02-13 | 吉林大学 | Inoculant for refining gray cast iron texture and preparation method and application thereof |
| CN104060154A (en) * | 2014-05-28 | 2014-09-24 | 安徽省瑞顺铸造科技有限公司 | QT500 casting and production method thereof |
| CN104131215A (en) * | 2014-07-14 | 2014-11-05 | 常熟市精工模具制造有限公司 | Micro-alloyed cast iron glass die and making method thereof |
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2016
- 2016-06-14 CN CN201610415659.2A patent/CN106048399A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005082869A (en) * | 2003-09-10 | 2005-03-31 | Hino Motors Ltd | Material of rotor for disc brake |
| CN101210296A (en) * | 2007-12-21 | 2008-07-02 | 盐城多为集团有限公司 | Low-chromium copper alloy gray cast iron and preparation method thereof |
| CN102925784A (en) * | 2012-10-21 | 2013-02-13 | 吉林大学 | Inoculant for refining gray cast iron texture and preparation method and application thereof |
| CN104060154A (en) * | 2014-05-28 | 2014-09-24 | 安徽省瑞顺铸造科技有限公司 | QT500 casting and production method thereof |
| CN104131215A (en) * | 2014-07-14 | 2014-11-05 | 常熟市精工模具制造有限公司 | Micro-alloyed cast iron glass die and making method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107755623A (en) * | 2017-10-27 | 2018-03-06 | 湖州正德轻工机械有限公司 | Automobile clutch pressure plate casting method |
| CN109014048A (en) * | 2018-10-19 | 2018-12-18 | 淄柴动力有限公司 | The casting production process and device of boron cast iron cylinder sleeve |
| CN114150214A (en) * | 2021-12-13 | 2022-03-08 | 东港市辽成机械有限公司 | HT200 gray cast iron and manufacturing method thereof |
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| CB02 | Change of applicant information |
Address after: 315807 Zhejiang City, Beilun province Xiapu District, Ningbo Road, Pu Pu Road, No. 2 Applicant after: Ningbo Limited by Share Ltd Address before: 315807 Xiapu Industrial Park, Beilun District, Zhejiang City, No. South Embankment Road, No. 2 Applicant before: Ningbo Hongxie Clutch Co., Ltd. |
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Application publication date: 20161026 |
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| RJ01 | Rejection of invention patent application after publication |