CN106907413A - A kind of low antiwear magnetic wipes composite and preparation method thereof, magnetic suspension train brake shoes and magnetic suspension train brake block - Google Patents
A kind of low antiwear magnetic wipes composite and preparation method thereof, magnetic suspension train brake shoes and magnetic suspension train brake block Download PDFInfo
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- CN106907413A CN106907413A CN201710090180.0A CN201710090180A CN106907413A CN 106907413 A CN106907413 A CN 106907413A CN 201710090180 A CN201710090180 A CN 201710090180A CN 106907413 A CN106907413 A CN 106907413A
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- Prior art keywords
- magnetic
- composite
- low
- wipes
- powder
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Classifications
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- 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—Composition 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
- F16D2200/0026—Non-ferro
-
- 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
- F16D2200/006—Materials; Production methods therefor containing fibres or particles
-
- 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
- F16D2200/0082—Production methods therefor
- F16D2200/0086—Moulding materials together by application of heat and pressure
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
Composite is wiped the invention discloses a kind of low antiwear magnetic, the low antiwear magnetic wipes composite includes matrix constituent element, friction component, lubricant component, wherein, described matrix constituent element is copper, the lubricant component is graphite, and the friction component includes tin, nickel, molybdenum, tungsten, ferrochrome, silica.The brake block for obtaining finally is made using low antiwear magnetic wiping composite of the invention, during friction catch, restraint coefficient is steady, and coefficient of friction is between 0.38 0.43.The composition of raw material for making low antiwear magnetic composite is fairly simple, does not hinder track；Selected constituent element is nonmagnetic constituent element, disclosure satisfy that magnetic requirements of the magnetic suspension train to brake material.
Description
Technical field
Composite and its preparation side are wiped the invention belongs to powder metallurgical technology, more particularly to a kind of low antiwear magnetic
Method, magnetic suspension train brake shoes and magnetic suspension train brake block.
Background technology
At present, magnetic levitation technology is constantly brought forth new ideas, and magnetic suspension train arises at the historic moment, and Changsha is formally runed for 2016
Domestic first magnetic suspension train of speed per hour 100km/h domestic technologies.The mode of braking of magnetic suspension train has two kinds：Electric braking
And mechanical braking, the principle of electric braking is still the principle of linear electric motors, simply by the electric current phase sequence changed in motor, so that
Change motor steering, then the power for being exported just is become for brake force by original tractive force；Compared to high ferro, magnetic suspension train is adopted
It is that, without wheel technology, mechanical braking is exactly, using the principle of frictional force, to be given as security using brake block and produce in orbit friction resistance
Power is braked.The brake block of magnetic suspension train includes steel coattail board and the brake shoes being riveted on coattail board.Magnetic suspension is arranged
Car proposes requirements at the higher level to the matching performance of brake shoes and the friction and wear behavior of rail, simultaneously because in train travelling process
With high-intensity magnetic field, the magnetic to brake shoes it is also proposed requirements at the higher level.
The material friction coefficient that prior art is used is relatively low, and braking distance is undesirable, between causing Train Schedule
Every elongation, operational efficiency is low；Friction component is complicated in existing material, and unstable properties, is matched with existing rail material
Property it is poor, easily to track produce damage, cause railway operation maintenance cost to increase.Current material is mainly copper and iron base composite wood
Material, with magnetic, it is impossible to meet requirement of the train to the low magnetic of brake material.Therefore, it is resistance to it is necessory to study a kind of low magnetic
Friction composite.
The content of the invention
Defect it is an object of the invention to overcome prior art, and provide a kind of low antiwear magnetic wipe composite and
Its preparation method, magnetic suspension train brake shoes and magnetic suspension train brake block.The low antiwear magnetic wipes composite material compositions
Simply, using its final brake block good stability for obtaining, coefficient of friction is higher, do not hinder track, braking distance meets magnetic suspension
Train brake requirement.
In order to solve the above technical problems, technical scheme proposed by the present invention is：
A kind of low antiwear magnetic wipes composite, including matrix constituent element, friction component, lubricant component, wherein, described matrix
Constituent element is copper, and the lubricant component is graphite, and the friction component includes each component of following weight portion：1~7 part of tin, nickel 2~
7 parts, 1~7 part of molybdenum, 1~5 part of tungsten, 5~20 parts of silica, 1~8 part of ferrochrome, the low antiwear magnetic wiped in composite,
The mass percent of friction component is 15%~30%.
Friction and wear behavior of the composite under low speed, low load condition of work is ensured using silica, ferrochrome
Effect；The high temperature refractories such as tungsten, molybdenum are added, the fretting wear under stability of composite materials high speed, heavy load condition of work is played
The effect of performance；Tin is added, nickel primarily serves alloy strengthening effect, under conditions of the mass percent for ensureing friction component,
More than adjustment the ratio of each material, finally obtains most suitable formula, can be used for making and obtains with great friction coefficient, and performance is steady
It is fixed, the composite of low magnetic.Preferably, the friction component includes each component of following weight portion：1~7 part of tin, nickel 2~7
Part, 1~7 part of molybdenum, 1~5 part of tungsten, 5~20 parts of silica, 1~8 part of ferrochrome, by the content for controlling ferro element, it is ensured that the material
Material formula is that low magnetic is even nonmagnetic.It is further preferred that the friction component includes each component of following weight portion：Tin
2~6 parts, 2~5 parts of nickel, 3~5 parts of molybdenum, 2~5 parts of tungsten, 2~8 parts of ferrochrome, 8~18 parts of silica.
Graphite is lubricant component, and its effect is mainly the effect of lubrication friction constituent element, if lubricant component is excessive, can be caused
Friction coefficient of composite material is relatively low；If lubricant component is very few, material friction coefficient is higher.By rigorous assay optimization, adjust
The ratio of whole friction component and lubricant component, the low antiwear magnetic for obtaining wipes composite, and above-mentioned low antiwear magnetic wipes composite wood
Material, the percetage by weight of lubricant component is 10%~20%.The low antiwear magnetic is wiped into composite and is fabricated to brake shoes, and
The brake block for obtaining with great friction coefficient and not hindering wheel track finally can be made.
The Brinell hardness that the low antiwear magnetic wipes composite is 20HBW~45HBW, shear strength be 20Mpa~
28Mpa, is 1Gs/Oe~1.08Gs/Oe with respect to recoil permeability.
To realize objects of the invention, it is also provided the preparation method that a kind of low antiwear magnetic wipes composite, including
Following steps：
(a) dispensing batch mixing：Each powder raw material is weighed according to formula rate, the powder raw material is put into three-dimensional blender
In machine, mix 240-360 minutes, be sufficiently mixed uniformly, obtain compound, each powder raw material includes glass putty, nickel powder, molybdenum
Powder, tungsten powder, silicon dioxide powder, ferrochrome powder, copper powder, graphite particle；
B () is compressing：Compound is fitted into compressing in mould；
(c) sinter molding：It is 980 in sintering temperature by the bonding rear loading sintering furnace pressure sintering of green compact and steel backing plate
DEG C~1050 DEG C, pressure be 7MPa~11MPa under the conditions of, sintering time 200-300 minutes, cooling was come out of the stove, and obtained the low magnetic
Property composite materials resistant to friction.
Pressure sintering is the critical process that the low antiwear magnetic of adjustment wipes composite friction and wear behavior, is sintered by adjusting
Temperature, time, pressure improves the physical and mechanical property of composite, while can be with the friction and wear behavior of stability of composite materials.
Powder metallurgy pressing compact density is mainly influenceed by composition of raw material and pressing pressure, wherein, mold shape
There is certain influence.By testing empirical discovery, it is compressing during, pressed density is controlled to 4.9g/cm3~5.2g/cm3,
The final magnetic suspension train brake block for preparing is preferable with the frictional fit of forged steel, cast steel or cast iron, and material abrasion is smaller,
And do not hinder the brake disc or track of forged steel, cast steel or cast iron quality.
Further, by testing known to experience, in each powder raw material, the granularity of graphite particle is to composite
Wear extent and the shear strength of material all have a significant impact, by contrasting Optimum Experiment, select granularity -50~+150
Composite prepared by purpose graphite particle has low wear rate, good shear strength.
Further, the granularity of the silicon dioxide powder is -80 mesh；Remaining powder is former in matrix constituent element and friction component
The granularity of material is -200 mesh.
To realize wiping the magnetcisuspension that composite is prepared by the low antiwear magnetic objects of the invention, it is also provided a kind of
Floating train brake shoes.
To realize objects of the invention, it is also provided a kind of magnetic suspension train brake block, the magnetic suspension train brake block bag
Coattail board and the brake shoes being riveted on coattail board are included, the brake shoes is magnetic suspension train brake shoes of the present invention.
The inventive method is relatively low for existing powder metallurgy brake flat coefficient of friction, and braking distance is inadequate, to braking adjustment debit
The problem of wound is improved, and it improves main points and is embodied in the key element brake shoes of brake block using metal-based powder metallurgy original
Material is made, and makes the brake block of preparation and has following features：During friction catch, restraint coefficient is steady, coefficient of friction
Between 0.38-0.43.The composition of raw material for making low antiwear magnetic composite is fairly simple, does not hinder track；Selected constituent element
Nonmagnetic constituent element is, magnetic requirements of the magnetic suspension train to brake material are disclosure satisfy that.
Specific embodiment
For the ease of understanding the present invention, more comprehensively, meticulously retouched to inventing to do herein below in conjunction with preferred embodiment
State, but protection scope of the present invention is not limited to specific examples below.
Unless otherwise defined, all technical terms used hereinafter are generally understood that implication phase with those skilled in the art
Together.Technical term used herein is intended merely to describe the purpose of specific embodiment, is not intended to limitation of the invention
Protection domain.
Unless otherwise specified, various raw material, reagent, instrument and equipment used in the present invention etc. can be by city
Field is commercially available or can be prepared by existing method.
Embodiment：
Embodiment 1
The low antiwear magnetic of the present embodiment wipes composite to be included：58 parts of copper, 2 parts of tin, 3 parts of nickel, 2 parts of molybdenum, 2 parts of tungsten, chromium
6 parts of iron, 1 part of silica 1,16 parts of graphite.
The low antiwear magnetic of the present embodiment wipes composite and is prepared via a method which to obtain：
(a) dispensing batch mixing：Each powder raw material is weighed according to formula rate, is put into three-dimensional material mixer after slightly mixing, mixed
200 minutes, it is sufficiently mixed uniformly, obtains compound, wherein, graphite particle size is -50~+150 mesh, the granularity of silicon dioxide powder
It is -80 mesh, remaining material powder includes that glass putty, nickel powder, molybdenum powder, tungsten powder, ferrochrome powder, the granularity of copper powder are -200 mesh；
B () is compressing：Compound is fitted into compressing in 400 tons of automatic dies of press, pressed density is 5.1g/
cm3, obtain green compact；
(c) sinter molding：It is 980 in sintering temperature by the bonding rear loading sintering furnace pressure sintering of green compact and steel backing plate
DEG C, under the conditions of pressure is 7.9MPa, sintering time 200 minutes, cooling is come out of the stove, and is obtained low antiwear magnetic and is wiped composite.
The automatic die for using that the low antiwear magnetic of the present embodiment is wiped in composite material and preparation method thereof step (b) is magnetcisuspension
The floating train block-shaped adaptable mould of brake, prepares the magnetic suspension train brake shoes of the present embodiment.
The magnetic suspension train brake shoes of the present embodiment is riveted together with machining steel back coattail board, is obtained
Brake block finished product.
The physical and mechanical property of the magnetic suspension train brake shoes according to the present embodiment is as shown in table 1：
Table 1
The MM-3000 friction wear testing machine Braking tests that brake block according to the present embodiment is measured are as shown in table 2：
Table 2
Embodiment 2
The low antiwear magnetic of the present embodiment wipes composite to be included：58 parts of copper, 3 parts of tin, 2 parts of nickel, 3 parts of molybdenum, 2 parts of tungsten, chromium
8 parts of iron, 2 parts of silica 1,12 parts of graphite.
The low antiwear magnetic of the present embodiment wipes composite and is prepared via a method which to obtain：
(a) dispensing batch mixing：Each powder raw material is weighed according to formula rate, is put into three-dimensional material mixer after slightly mixing, mixed
200 minutes, it is sufficiently mixed uniformly, obtains compound, wherein.Graphite particle size is -50~+150 mesh, the granularity of silicon dioxide powder
It is -80 mesh, the granularity of remaining material powder is -200 mesh；
B () is compressing：Compound is fitted into compressing in 400 tons of automatic dies of press, pressed density is 5.1g/
cm3, obtain green compact；
(c) sinter molding：It is 970 in sintering temperature by the bonding rear loading sintering furnace pressure sintering of green compact and steel backing plate
DEG C, under the conditions of pressure is 7.9MPa, sintering time 200 minutes, cooling is come out of the stove, and is obtained low antiwear magnetic and is wiped composite.
The automatic die for using that the low antiwear magnetic of the present embodiment is wiped in composite material and preparation method thereof step (b) is magnetcisuspension
The floating train block-shaped adaptable mould of brake, prepares the magnetic suspension train brake shoes of the present embodiment.
The magnetic suspension train brake shoes of the present embodiment is riveted together with machining steel back coattail board, is obtained
Brake block finished product.
The physical and mechanical property of the magnetic suspension train brake shoes according to the present embodiment is as shown in table 3：
Table 3
The MM-3000 friction wear testing machine Braking tests that brake block according to the present embodiment is measured are as shown in table 4：
Table 4
Embodiment 3
The low antiwear magnetic of the present embodiment wipes composite includes each component of following weight portion：58 parts of copper, 2 parts of tin, nickel 2
Part, 1 part of molybdenum, 1 part of tungsten, 5 parts of ferrochrome, 0 part of silica 1,19 parts of graphite.
The magnetic suspension train brake shoes of the present embodiment is prepared via a method which to obtain：
(a) dispensing batch mixing：Each powder raw material is weighed according to formula rate, is put into three-dimensional material mixer after slightly mixing, mixed
200 minutes, be sufficiently mixed uniform, obtain compound, wherein graphite particle size is -50~+150 mesh, the granularity of silicon dioxide powder for -
80 mesh, the granularity of remaining material powder is -200 mesh；
B () is compressing：Compound is fitted into compressing in 400 tons of automatic dies of press, pressed density is 5.1g/
cm3, obtain green compact；
(c) sinter molding：It is 970 in sintering temperature by the bonding rear loading sintering furnace pressure sintering of green compact and steel backing plate
DEG C, under the conditions of pressure is 7.9MPa, sintering time 240 minutes, cooling is come out of the stove, and is obtained low antiwear magnetic and is wiped composite.
The automatic die for using that the low antiwear magnetic of the present embodiment is wiped in composite material and preparation method thereof step (b) is magnetcisuspension
The floating train block-shaped adaptable mould of brake, prepares the magnetic suspension train brake shoes of the present embodiment.
The magnetic suspension train brake shoes of the present embodiment is riveted together with machining steel back coattail board, is obtained
Brake block finished product.
The physical and mechanical property of the magnetic suspension train brake shoes according to the present embodiment is as shown in table 5：
Table 5
The MM-3000 friction wear testing machine Braking tests that brake block according to the present embodiment is measured are as shown in table 6：
Table 6
The above, only best mode for carrying out the invention, any one skilled in the art is in the present invention
In the technical scope of disclosure, the simple change or equivalence replacement of the technical scheme that can be become apparent to each fall within of the invention
In protection domain.
Claims (10)
1. a kind of low antiwear magnetic wipes composite, including matrix constituent element, friction component, lubricant component, it is characterised in that described
Matrix constituent element is copper, and the lubricant component is graphite, and the friction component includes each component of following weight portion：1~7 part of tin,
2~7 parts of nickel, 1~7 part of molybdenum, 1~5 part of tungsten, 5~20 parts of silica, 1~8 part of ferrochrome, the low antiwear magnetic composite
In, the mass percent of friction component is 15%~30%.
2. low antiwear magnetic according to claim 1 wipes composite, it is characterised in that the friction component includes as follows
The each component of weight portion：2~6 parts of tin, 2~5 parts of nickel, 3~5 parts of molybdenum, 2~5 parts of tungsten, 2~8 parts of ferrochrome, silica 8~18
Part.
3. low antiwear magnetic according to claim 1 wipes composite, it is characterised in that the weight hundred of the lubricant component
Fraction is 10%~20%.
4. low antiwear magnetic according to claim 1 wipes composite, it is characterised in that the low antiwear magnetic wipes compound
The Brinell hardness of material is 20HBW~45HBW, and shear strength is 20Mpa~28Mpa, is 1Gs/Oe with respect to recoil permeability
~1.08Gs/Oe.
5. a kind of antiwear magnetic low as described in Claims 1-4 any one wipes the preparation method of composite, and its feature exists
In comprising the following steps：
(a) dispensing batch mixing：Each powder raw material is weighed according to formula rate, the powder raw material is put into three-dimensional material mixer
In, mix 240-360 minutes, it is sufficiently mixed uniformly, compound is obtained, each powder raw material includes glass putty, nickel powder, molybdenum
Powder, tungsten powder, silicon dioxide powder, ferrochrome powder, copper powder, graphite particle；
B () is compressing：Compound is fitted into compressing in mould；
(c) sinter molding：By green compact and steel backing plate it is bonding after load sintering furnace pressure sintering, sintering temperature be 980 DEG C~
1050 DEG C, pressure be 7MPa~11MPa under the conditions of, sintering time 200-300 minutes, cooling was come out of the stove, and obtained the low magnetic resistance to
Friction composite.
6. preparation method according to claim 5, it is characterised in that in the step (a), the grain of the silicon dioxide powder
It is -80 mesh to spend；The granularity of remaining raw material is -200 mesh in matrix constituent element and friction component.
7. preparation method according to claim 5, it is characterised in that in the step (a), the granularity of the graphite particle
It is -50 mesh of mesh~+150.
8. preparation method according to claim 5, it is characterised in that in the step (b), pressed density is 4.9g/cm3
~5.2g/cm3。
9. a kind of antiwear magnetic low as described in Claims 1-4 any one wipes the magnetic suspension train use that composite is prepared into
Brake shoes.
10. a kind of magnetic suspension train brake block, the magnetic suspension train brake block includes coattail board and is riveted on coattail board
Brake shoes, it is characterised in that the brake shoes is magnetic suspension train brake shoes described in claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710090180.0A CN106907413A (en) | 2017-02-20 | 2017-02-20 | A kind of low antiwear magnetic wipes composite and preparation method thereof, magnetic suspension train brake shoes and magnetic suspension train brake block |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710090180.0A CN106907413A (en) | 2017-02-20 | 2017-02-20 | A kind of low antiwear magnetic wipes composite and preparation method thereof, magnetic suspension train brake shoes and magnetic suspension train brake block |
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| Publication Number | Publication Date |
|---|---|
| CN106907413A true CN106907413A (en) | 2017-06-30 |
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|---|---|---|---|
| CN201710090180.0A Pending CN106907413A (en) | 2017-02-20 | 2017-02-20 | A kind of low antiwear magnetic wipes composite and preparation method thereof, magnetic suspension train brake shoes and magnetic suspension train brake block |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107824783A (en) * | 2017-11-10 | 2018-03-23 | 中国科学院山西煤炭化学研究所 | A kind of high-speed train braking copper-iron-based powder metallurgical friction material and preparation method |
| CN109136627A (en) * | 2018-10-16 | 2019-01-04 | 北京天宜上佳高新材料股份有限公司 | Magnetic suspension train friction material and its preparation method and application |
| CN110434345A (en) * | 2019-07-29 | 2019-11-12 | 嘉善德诺轴承有限公司 | A kind of cladding sintered self-lubricated bearing and preparation method thereof |
| CN113073225A (en) * | 2021-02-10 | 2021-07-06 | 华东交通大学 | Brake material for medium-low speed magnetic suspension train and preparation method thereof |
| CN114110062A (en) * | 2021-11-30 | 2022-03-01 | 湖南屹林材料技术有限公司 | Magnetic suspension train braking material and preparation technology thereof |
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| CN110434345A (en) * | 2019-07-29 | 2019-11-12 | 嘉善德诺轴承有限公司 | A kind of cladding sintered self-lubricated bearing and preparation method thereof |
| CN113073225A (en) * | 2021-02-10 | 2021-07-06 | 华东交通大学 | Brake material for medium-low speed magnetic suspension train and preparation method thereof |
| CN114110062A (en) * | 2021-11-30 | 2022-03-01 | 湖南屹林材料技术有限公司 | Magnetic suspension train braking material and preparation technology thereof |
| CN114110062B (en) * | 2021-11-30 | 2024-04-09 | 湖南屹林材料技术有限公司 | Magnetic suspension train braking material and preparation technology thereof |
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Application publication date: 20170630 |