CN103273057A - Cr2AlC reinforced bronze-based brake pad material used for high-speed railway and preparation method thereof - Google Patents
Cr2AlC reinforced bronze-based brake pad material used for high-speed railway and preparation method thereof Download PDFInfo
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Abstract
The invention provides a Cr2AlC reinforced bronze-based brake pad material used for a high-speed railway and a preparation method of the Cr2AlC reinforced bronze-based brake pad material used for the high-speed railway, and relates to a material and a preparation method of the material. The Cr2AlC reinforced bronze-based brake pad material used for the high-speed railway and the preparation method of the Cr2AlC reinforced bronze-based brake pad material used for the high-speed railway aim at solving the technical problems that an abrasive of an existing brake pad material used in the high-speed railway is high in hardness and bad in plasticity and the fact that a brake pad severely abrades auxiliary materials exists. The Cr2AlC reinforced bronze-based brake pad material used for the high-speed railway is prepared from copper powder, Cr2AlC powder, iron powder, aluminum powder, manganese powder, nickel powder, silica, tin powder, graphite, boron nitride and molybdenum disulfide. The preparation method includes the following steps of drying weighed raw materials, then, conducting ball milling and mixing, placing the mixed raw material powder into a graphite die, conducting warming and loading under vacuum protection, conducting heat preservation, and obtaining the Cr2AlC reinforced bronze-based brake pad material. Compared with the prior art, the Cr2AlC reinforced bronze-based brake pad material used for the high-speed railway has the advantages of being stable in friction coefficient, low in abrasion rate, stable in friction performance, small in erosion for a brake disc, good in electricity conduction performance and heat conduction performance, high in finished product rate of the materials and easy to machine.
Description
Technical field
The present invention relates to a kind of metal-base composites for high-speed railway train brake lining and preparation method thereof, belong to the powdered metallurgical material technical field.
Background technology
Along with fast development of national economy, the railway passenger and freight freight volume increases sharply, and the high speed of railway transportation has become inevitable development trend.China points out at the Eleventh Five-Year Plan program outline, to progressively realize the Line for Passenger Transportation high speed, train speed per hour will be brought up to 200～250 kilometers, F-Zero should be greater than 300 kilometers, during 12 planning were formulated, high ferro was promoted to the field of first developing in the strategic new industry during 12 especially, along with the wide high ferro in capital and Harbin-to-Dalian high ferro are open to traffic, the progressively realization of " four vertical four horizontal strokes " railway Express Passenger passage, China has entered the high-speed railway epoch.The dependence on import but the brake lining material of China Express Railway is still needed, the high ferro brake lining of speed per hour still can't autonomous production more than 250 kilometers.
Improving constantly of train speed also proposed more and more stricter requirement to its braking ability.The development at present of used for high-speed railway brake pad material the most ripe most widely used be powder metallurgy friction material, it is by matrix, rubbing agent, lubricant is formed.Have a lot of problems but traditional powder metallurgy friction material is used at the high-speed railway brake pad: because the high-speed friction of train braking produces high temperature, this just requires material to have good thermal conductivity and causes the destruction of brake lining to prevent too high thermograde.And the rubbing agent in the prior powder metallurgy friction material such as silica, are combined and cause BE in the thermal conductivity factor that it is low and the interface a little less than matrix, the material monolithic thermal conductivity factor is reduced; Because rubbing agent hardness is very high and plasticity is very poor, can cause brake lining to the heavy wear of pair materials simultaneously; For reducing wearing and tearing, the prior powder metallurgy friction material will add lubricant such as the graphite of significant proportion, and this can influence the whole mechanical property of material greatly.
Summary of the invention
The objective of the invention is in order to solve existing used for high-speed railway brake pad material poor thermal conductivity, rubbing agent hardness height and plasticity are very poor, can cause brake lining to the technical problem of the heavy wear of pair materials, and a kind of used for high-speed railway Cr is provided
2AlC strengthens bronze basic brake pad material and preparation method thereof.
Used for high-speed railway Cr
2AlC strengthen bronze basic brake pad material according to volume parts by 45～75 parts of copper powders, 0.01～10 part of manganese powder, 0.01～12 part of aluminium powder, 1～30 part of Cr
2AlC powder, 0.01～20 part of iron powder, 0.01～10 part of nickel powder, 0.01-10 part silica, 0.01～12 part of glass putty, 5～40 parts of graphite, 0.01～20 part of boron nitride and 0.01～10 part of molybdenum bisuphide are made.
Used for high-speed railway Cr
2The preparation method that AlC strengthens bronze basic brake pad material carries out according to following steps:
One, takes by weighing 45～75 parts of copper powders, 0.01～10 part of manganese powder, 0.01～12 part of aluminium powder, 1～30 part of Cr according to volume parts
2AlC powder, 0.01～20 part of iron powder, 0.01～10 part of nickel powder, 0.01-10 part silica, 0.01～12 part of glass putty, 5～40 parts of graphite, 0.01～20 part of boron nitride and 0.01～10 part of molybdenum bisuphide;
Two, the raw material drying that step 1 is taken by weighing, and then ball milling mixed 12～36 hours, got raw meal;
Three, will put into graphite jig through the raw meal that step 2 obtains, with the programming rate raising temp and loading of 10 ℃/min, imposed load is 1～35MPa under the vacuum protection, when temperature rises to 700～1100 ℃, is incubated 0.5～6 hour, namely gets used for high-speed railway Cr
2AlC strengthens bronze basic brake pad material.
Cr
2AlC is a kind of ternary layered compound.It had both had the plurality of advantages of pottery, such as high-modulus, and high strength.Also has some performance of metal (such as soft, can process, the good conductive heat conductivility has higher damage tolerance), and fabulous corrosion and heat resistant and antioxygenic property, because having with layer structure like the graphite-like, it has certain self-lubricating function simultaneously.Ternary layered ceramic Cr
2AlC becomes the desirable wild phase of copper alloy because having above-mentioned excellent properties.
The invention provides a kind of with Cr
2AlC is wild phase, and copper alloy is matrix, and graphite and hexagonal boron nitride are the used for high-speed railway Cr of lubricant
2AlC strengthens bronze basic brake pad material.
Advantage of the present invention is as follows:
1, with copper alloy powder with have the Cr of self-lubricating function
2The AlC powder is primary raw material;
2, utilize heat pressing process to make sintering, moulding is once finished, and need not double sintering and reprocessing;
3, has the controllable interface reaction by the synthetic composite of heat pressing process, with the different interfacial reactions of reaction temperature and combination degree difference;
4, product density height has good comprehensive mechanical properties, and (270MPa～350MPa), wearability is good, and electrical and thermal conductivity performance is good, finished material rate height for the compressive strength height;
5, brake lining material friction coefficient is stable, sells dish friction and wear test coefficient of friction and fluctuates about 0.35, and wear rate is low, and stable friction performance is little to the disc material wearing and tearing.
The specific embodiment
Technical solution of the present invention is not limited to the following cited specific embodiment, also comprises any combination between each specific embodiment.
The specific embodiment one: present embodiment used for high-speed railway Cr
2AlC strengthen bronze basic brake pad material according to volume parts by 45～75 parts of copper powders, 0.01～10 part of manganese powder, 0.01～12 part of aluminium powder, 1～30 part of Cr
2AlC powder, 0.01～20 part of iron powder, 0.01～10 part of nickel powder, 0.01～10 part of silica, 0.01～12 part of glass putty, 5～40 parts of graphite, 0.01～20 part of boron nitride and 0.01～10 part of molybdenum bisuphide are made.
The specific embodiment two: that present embodiment and the specific embodiment one are different is used for high-speed railway Cr
2AlC strengthen bronze basic brake pad material according to volume parts by 48～68 parts of copper powders, 0.03～8 part of manganese powder, 0.5～11 part of aluminium powder, 2～28 parts of Cr
2AlC powder, 1～23 part of iron powder, 0.1～11 part of nickel powder, 0.1～9 part of silica, 0.1～11 part of glass putty, 6～19 parts of graphite, 0.1～19 part of boron nitride and 0.1～9 part of molybdenum bisuphide are made.Other is identical with the specific embodiment one.
The specific embodiment three: that present embodiment is different with one of the specific embodiment one or two is used for high-speed railway Cr
2AlC strengthen bronze basic brake pad material according to volume parts by 50～60 parts of copper powders, 0.5～6 part of manganese powder, 1～10 part of aluminium powder, 3～25 parts of Cr
2AlC powder, 0.5～22 part of iron powder, 0.5～10 part of nickel powder, 0.2～8 part of silica, 0.5～10 part of glass putty, 8～18 parts of graphite, 0.5～18 part of boron nitride and 0.5～8 part of molybdenum bisuphide are made.Other and one of the specific embodiment one or two are inequality.
The specific embodiment four: that present embodiment is different with one of specific embodiment one to three is used for high-speed railway Cr
2AlC strengthen bronze basic brake pad material according to volume parts by 52～53 parts of copper powders, 1～9 part of manganese powder, 3～9 parts of aluminium powders, 5～22 parts of Cr
2AlC powder, 1～20 part of iron powder, 1～9 part of nickel powder, 1～7 part of silica, 1～8 part of glass putty, 9～15 parts of graphite, 1～15 part of boron nitride and 1～5 part of molybdenum bisuphide are made.Other is identical with one of specific embodiment one to three.
The specific embodiment five: that present embodiment is different with one of specific embodiment one to four is used for high-speed railway Cr
2AlC strengthen bronze basic brake pad material according to volume parts by 45 parts of copper powders, 5 parts of manganese powders, 6 parts of aluminium powders, 20 parts of Cr
2AlC powder, 10 parts of iron powders, 5 parts of nickel powders, 5 parts of silica, 5 parts of glass puttys, 10 parts of graphite, 5 parts of boron nitride and 4 parts of molybdenum bisuphide are made.Other is identical with one of specific embodiment one to four.
The specific embodiment six: that present embodiment is different with one of specific embodiment one to five is used for high-speed railway Cr
2AlC strengthen bronze basic brake pad material according to volume parts by 60 parts of copper powders, 0.01～10 part of manganese powder, 0.01～12 part of aluminium powder, 30 parts of Cr
2AlC powder, 25 parts of iron powders, 15 parts of nickel powders, 10 parts of silica, 12 parts of glass puttys, 40 parts of graphite, 20 parts of boron nitride and 9 parts of molybdenum bisuphide are made.Other is identical with one of specific embodiment one to five.
The specific embodiment seven: embodiment one described used for high-speed railway Cr
2The preparation method that AlC strengthens bronze basic brake pad material carries out according to following steps:
One, takes by weighing 45～75 parts of copper powders, 0.01～10 part of manganese powder, 0.01～12 part of aluminium powder, 1～30 part of Cr according to volume parts
2AlC powder, 0.01～20 part of iron powder, 0.01～10 part of nickel powder, 0.01～10 part of silica, 0.01～12 part of glass putty, 5～40 parts of graphite, 0.01～20 part of boron nitride and 0.01～10 part of molybdenum bisuphide;
Two, the raw material drying that step 1 is taken by weighing, and then ball milling mixed 12～36 hours, got raw meal;
Three, will put into graphite jig through the raw meal that step 2 obtains, with the programming rate raising temp and loading of 10 ℃/min, imposed load is 1～35MPa under the vacuum protection, when temperature rises to 700～1100 ℃, is incubated 0.5～6 hour, namely gets used for high-speed railway Cr
2AlC strengthens bronze basic brake pad material.
The specific embodiment eight: present embodiment and the specific embodiment seven be that ball milling mixed 20 hours in the step 2.Other is identical with the specific embodiment seven.
The specific embodiment nine: what present embodiment was different with the specific embodiment seven or eight is that imposed load described in the step 3 is 20MPa.Other is identical with the specific embodiment seven or eight.
The specific embodiment ten: what present embodiment was different with one of specific embodiment seven to nine is to work as temperature in the step 3 to rise to 1000 ℃, is incubated 3 hours.Other is identical with one of specific embodiment seven to nine.
Adopt following verification experimental verification effect of the present invention:
Test one: used for high-speed railway Cr
2The preparation method that AlC strengthens bronze basic brake pad material carries out according to following steps:
One, height takes by weighing 45 parts of copper powders, 0.01 part of manganese powder, 12 parts of aluminium powders, 1 part of Cr according to volume parts
2AlC powder, 0.01 part of iron powder, 0.01 part of nickel powder, 0.01 part of silica, 0.01 part of glass putty, 5 parts of graphite, 0.01 part of boron nitride and 0.01 part of molybdenum bisuphide;
Two, the raw material drying that step 1 is taken by weighing, and then ball milling mixed 12 hours, got raw meal;
Three, will put into graphite jig through the raw meal that step 2 obtains, with the programming rate raising temp and loading of 10 ℃/min, imposed load is 1MPa under the vacuum protection, when temperature rises to 700 ℃, is incubated 0.5 hour, namely gets used for high-speed railway Cr
2AlC strengthens bronze basic brake pad material.
Test two: used for high-speed railway Cr
2The preparation method that AlC strengthens bronze basic brake pad material carries out according to following steps:
One, height takes by weighing 60 parts of copper powders, 10 parts of manganese powders, 12 parts of aluminium powders, 30 parts of Cr according to volume parts
2AlC powder, 25 parts of iron powders, 15 parts of nickel powders, 10 parts of silica, 12 parts of glass puttys, 40 parts of graphite, 20 parts of boron nitride and 10 parts of molybdenum bisuphide;
Two, the raw material drying that step 1 is taken by weighing, and then ball milling mixed 36 hours, got raw meal;
Three, will put into graphite jig through the raw meal that step 2 obtains, with the programming rate raising temp and loading of 10 ℃/min, imposed load is 35MPa under the vacuum protection, when temperature rises to 1100 ℃, is incubated 6 hours, namely gets used for high-speed railway Cr
2AlC strengthens bronze basic brake pad material.
Test three: used for high-speed railway Cr
2The preparation method that AlC strengthens bronze basic brake pad material carries out according to following steps:
One, height takes by weighing 48 parts of copper powders, 8 parts of manganese powders, 10 parts of aluminium powders, 3 parts of Cr according to volume parts
2AlC powder, 3 parts of iron powders, 3 parts of nickel powders, 3 parts of silica, 3 parts of glass puttys, 8 parts of graphite, 3 parts of boron nitride and 3 parts of molybdenum bisuphide;
Two, the raw material drying that step 1 is taken by weighing, and then ball milling mixed 12～36 hours, got raw meal;
Three, will put into graphite jig through the raw meal that step 2 obtains, with the programming rate raising temp and loading of 10 ℃/min, imposed load is 4MPa under the vacuum protection, when temperature rises to 800 ℃, is incubated 2 hours, namely gets used for high-speed railway Cr
2AlC strengthens bronze basic brake pad material.
Test four: used for high-speed railway Cr
2The preparation method that AlC strengthens bronze basic brake pad material carries out according to following steps:
One, height takes by weighing 50 parts of copper powders, 7 parts of manganese powders, 6 parts of aluminium powders, 8 parts of Cr according to volume parts
2AlC powder, 6 parts of iron powders, 8 parts of nickel powders, 4 parts of silica, 6 parts of glass puttys, 9 parts of graphite, 8 parts of boron nitride and 2 parts of molybdenum bisuphide;
Two, the raw material drying that step 1 is taken by weighing, and then ball milling mixed 12～36 hours, got raw meal;
Three, will put into graphite jig through the raw meal that step 2 obtains, with the programming rate raising temp and loading of 10 ℃/min, imposed load is 8MPa under the vacuum protection, when temperature rises to 900 ℃, is incubated 3 hours, namely gets used for high-speed railway Cr
2AlC strengthens bronze basic brake pad material.
Test five: used for high-speed railway Cr
2The preparation method that AlC strengthens bronze basic brake pad material carries out according to following steps:
One, height takes by weighing 55 parts of copper powders, 2 parts of manganese powders, 2 parts of aluminium powders, 20 parts of Cr according to volume parts
2AlC powder, 20 parts of iron powders, 13 parts of nickel powders, 9 parts of silica, 10 parts of glass puttys, 19 parts of graphite, 18 parts of boron nitride and 8 parts of molybdenum bisuphide;
Two, the raw material drying that step 1 is taken by weighing, and then ball milling mixed 12～36 hours, got raw meal;
Three, will put into graphite jig through the raw meal that step 2 obtains, with the programming rate raising temp and loading of 10 ℃/min, imposed load is 30MPa under the vacuum protection, when temperature rises to 1000 ℃, is incubated 4 hours, namely gets used for high-speed railway Cr
2AlC strengthens bronze basic brake pad material.
Claims (10)
1. used for high-speed railway Cr
2AlC strengthens bronze basic brake pad material, it is characterized in that used for high-speed railway Cr
2AlC strengthen bronze basic brake pad material according to volume parts by 45～75 parts of copper powders, 0.01～10 part of manganese powder, 0.01～12 part of aluminium powder, 1～30 part of Cr
2AlC powder, 0.01～20 part of iron powder, 0.01～10 part of nickel powder, 0.01～10 part of silica, 0.01～12 part of glass putty, 5～40 parts of graphite, 0.01～20 part of boron nitride and 0.01～10 part of molybdenum bisuphide are made.
2. according to the described used for high-speed railway Cr of claim 1
2AlC strengthens bronze basic brake pad material, it is characterized in that used for high-speed railway Cr
2AlC strengthen bronze basic brake pad material according to volume parts by 48～68 parts of copper powders, 0.03～8 part of manganese powder, 0.5～11 part of aluminium powder, 2～28 parts of Cr
2AlC powder, 1～23 part of iron powder, 0.1～11 part of nickel powder, 0.1～9 part of silica, 0.1～11 part of glass putty, 6～19 parts of graphite, 0.1～19 part of boron nitride and 0.1～9 part of molybdenum bisuphide are made.
3. according to the described used for high-speed railway Cr of claim 1
2AlC strengthens bronze basic brake pad material, it is characterized in that used for high-speed railway Cr
2AlC strengthen bronze basic brake pad material according to volume parts by 50～60 parts of copper powders, 0.5～6 part of manganese powder, 1～10 part of aluminium powder, 3～25 parts of Cr
2AlC powder, 0.5～22 part of iron powder, 0.5～10 part of nickel powder, 0.2～8 part of silica, 0.5～10 part of glass putty, 8～18 parts of graphite, 0.5～18 part of boron nitride and 0.5～8 part of molybdenum bisuphide are made.
4. according to the described used for high-speed railway Cr of claim 1
2AlC strengthens bronze basic brake pad material, it is characterized in that used for high-speed railway Cr
2AlC strengthen bronze basic brake pad material according to volume parts by 52～53 parts of copper powders, 1～9 part of manganese powder, 3～9 parts of aluminium powders, 5～22 parts of Cr
2AlC powder, 1～20 part of iron powder, 1～9 part of nickel powder, 1～7 part of silica, 1～8 part of glass putty, 9～15 parts of graphite, 1～15 part of boron nitride and 1～5 part of molybdenum bisuphide are made.
5. according to the described used for high-speed railway Cr of claim 1
2AlC strengthens bronze basic brake pad material, it is characterized in that used for high-speed railway Cr
2AlC strengthen bronze basic brake pad material according to volume parts by 45 parts of copper powders, 5 parts of manganese powders, 6 parts of aluminium powders, 20 parts of Cr
2AlC powder, 10 parts of iron powders, 5 parts of nickel powders, 5 parts of silica, 5 parts of glass puttys, 10 parts of graphite, 5 parts of boron nitride and 4 parts of molybdenum bisuphide are made.
6. according to the described used for high-speed railway Cr of claim 1
2AlC strengthens bronze basic brake pad material, it is characterized in that used for high-speed railway Cr
2AlC strengthen bronze basic brake pad material according to volume parts by 60 parts of copper powders, 8 parts of manganese powders, 9 parts of aluminium powders, 30 parts of Cr
2AlC powder, 25 parts of iron powders, 15 parts of nickel powders, 10 parts of silica, 12 parts of glass puttys, 40 parts of graphite, 20 parts of boron nitride and 9 parts of molybdenum bisuphide are made.
7. the described used for high-speed railway Cr of claim 1
2AlC strengthens the preparation method of bronze basic brake pad material, it is characterized in that used for high-speed railway Cr
2The preparation method that AlC strengthens bronze basic brake pad material carries out according to following steps:
One, takes by weighing 45～75 parts of copper powders, 0.01～10 part of manganese powder, 0.01～12 part of aluminium powder, 1～30 part of Cr according to volume parts
2AlC powder, 0.01～20 part of iron powder, 0.01～10 part of nickel powder, 0.01～10 part of silica, 0.01～12 part of glass putty, 5～40 parts of graphite, 0.01～20 part of boron nitride and 0.01～10 part of molybdenum bisuphide;
Two, the raw material drying that step 1 is taken by weighing, and then ball milling mixed 12～36 hours, got raw meal;
Three, will put into graphite jig through the raw meal that step 2 obtains, with the programming rate raising temp and loading of 10 ℃/min, imposed load is 1～35MPa under the vacuum protection, when temperature rises to 700～1100 ℃, is incubated 0.5～6 hour, namely gets used for high-speed railway Cr
2AlC strengthens bronze basic brake pad material.
8. according to the described used for high-speed railway Cr of claim 7
2AlC strengthens the preparation method of bronze basic brake pad material, it is characterized in that ball milling mixed 20 hours in the step 2.
9. according to the described used for high-speed railway Cr of claim 7
2AlC strengthens the preparation method of bronze basic brake pad material, it is characterized in that imposed load described in the step 3 is 20MPa.
10. according to the described used for high-speed railway Cr of claim 7
2AlC strengthens the preparation method of bronze basic brake pad material, it is characterized in that working as in the step 3 temperature and rises to 1000 ℃, is incubated 3 hours.
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Cited By (5)
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| CN103484702A (en) * | 2013-10-17 | 2014-01-01 | 厦门大学 | Cr2AlC-granule-reinforced Zn-base composite material and preparation method thereof |
| CN104328368A (en) * | 2014-12-03 | 2015-02-04 | 中国科学院上海硅酸盐研究所 | Self-lubricating and wear-resistant copper-based composite material and preparation method thereof |
| CN106424710A (en) * | 2016-10-21 | 2017-02-22 | 广西南宁智翠科技咨询有限公司 | High compression resistant strength powder metallurgy material for train brake lining |
| CN107058790B (en) * | 2017-04-05 | 2019-01-22 | 中国铁道科学研究院金属及化学研究所 | A kind of enhanced powder metallurgy friction material of intermetallic compound and its preparation method and application |
| CN110116213A (en) * | 2019-06-06 | 2019-08-13 | 陕西科技大学 | A kind of (Cr, Mo)2AlC solid-solution material and preparation method thereof |
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| CN110116213A (en) * | 2019-06-06 | 2019-08-13 | 陕西科技大学 | A kind of (Cr, Mo)2AlC solid-solution material and preparation method thereof |
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