CN104087245A - Friction material for brake-shoe of heavy axle-load wagon and preparation method of friction material - Google Patents
Friction material for brake-shoe of heavy axle-load wagon and preparation method of friction material Download PDFInfo
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- CN104087245A CN104087245A CN201410310701.5A CN201410310701A CN104087245A CN 104087245 A CN104087245 A CN 104087245A CN 201410310701 A CN201410310701 A CN 201410310701A CN 104087245 A CN104087245 A CN 104087245A
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Abstract
The invention discloses a friction material for a brake-shoe of a heavy axle-load wagon. The friction material is prepared from the following components in percentage by mass: 6-12 percent of nitrile rubber, 1-4 percent of butadiene styrene rubber, 3-8 percent of A-stage phenolic resin, 0.4-1 percent of insoluble sulfur, 0.1-0.6 percent of an accelerant, 0.1-0.6 part of a curing agent, 2-6 percent of carbon black, 8-18 percent of barite, 1-4 percent of kyanite, 17-40 percent of hybrid fibers, 7-14 percent of magnesium oxide, 2-6 percent of petroleum coke, 2-8 percent of calcium sulfate crystal whiskers, 1-4 percent of molybdenum disulfide, 1-5 percent of crystalline flake graphite, 1-4 percent of artificial graphite, 1-4 percent of mica iron oxide and 1-3 percent of antimony sulfide. The friction material can satisfy the friction performance and mechanical property required by the brake-shoe of the heavy axle-load wagon and can meet the high speed operating requirement on heavy load of the wagon.
Description
Technical field
The present invention relates to railway freight-car brake shoe technical field, relate in particular to a kind of heavy axle load wagon brake shoe friction materials and preparation method.
Background technology
At present, railway is the Aorta of national economy and national important infrastructure, and China railways cause has obtained the development of great-leap-forward in recent years.Wherein railway freight-car is to high speed, heavily loaded future development, the increase that axle is heavy, the raising of speed are all had higher requirement to train braking material, and freight car braking should have higher physical strength, good thermotolerance and thermal conductivity, stable frictional behaviour, lower wearing and tearing and reduce abrasion and the thermal damage to wheel with brake shoe.But current domestic lorry brake shoe only can meet axle with friction materials is heavily less than 25 tons of freight car braking requirements, cannot adapt to axle great in the braking Operational requirements of 30 tons of lorries.
Taking railway freight-car as example, now mostly adopt the material taking resin as main binding system with railway freight-car brake shoe, be prepared from through hot-forming, brake shoe prepared by this material is under load-carrying 80T, 100 kilometers of conditions of speed per hour, and its performance meets brake request substantially.But railway freight-car is in heavy duty, run at high speed in the situation that, as railway freight-car weight-carrying capacity is greater than under 100 kilometers of conditions higher than 100 tons, speed per hour, in the time of braking, require damping force larger, heat resistance to brake shoe and physical strength all have very high requirement, the existing brake shoe of preparing as main binding system taking resin, have that frictional behaviour is stable not, friction piece easy fracture, fall piece, the problems such as damascene is serious, easily cause wheel cut, thermal damage even to jeopardize traffic safety, cannot meet the brake request of existing heavy duty, the heavy railway freight-car of high speed macro-axis.
Summary of the invention
The object of this invention is to provide a kind of heavy axle load wagon brake shoe friction materials and preparation method, this friction materials can meet required frictional behaviour and the mechanical property of heavy axle load wagon brake shoe, meets railway freight-car heavy duty high speed Operational requirements.
A kind of heavy axle load wagon brake shoe friction materials, the mass percent of the concrete component of this friction materials is:
6～12 paracril, 1～4 styrene-butadiene rubber(SBR), 3～8 resol, 0.4～1 insoluble sulfur, 0.1～0.6 promotor, 0.1～0.6 solidifying agent, 2～6 carbon black, 8～18 barite, 1～4 kyanite, 17～40 assorted fibre, 7～14 magnesium oxide, 2～6 refinery coke, 2～8 calcium sulfate crystal whiskers, 1～4 molybdenumdisulphide, 1～5 crystalline flake graphite, 1～4 synthetic graphite, 1～4 iron mica and 1～3 antimony sulfide, wherein:
Described promotor comprises tetramethyl-thiuram disulfide TMTD, or the compound accelerant of tetramethylthiuram monosulfide TMTM proportioning compositions different from N-cyclohexyl-2-benzothiazole sulfonamide;
Described solidifying agent is hexamethylenetetramine.
As seen from the above technical solution provided by the invention, above-mentioned friction materials can meet required frictional behaviour and the mechanical property of heavy axle load wagon brake shoe, meets railway freight-car heavy duty high speed Operational requirements; And the brake shoe intensity of preparing with this friction materials is high, impelling strength good, there is stable frictional behaviour and good wear resistance; Solve composite brake shoe fracture under heavy duty at a high speed, fallen the defect of piece and the damage to wheel, can, for a long time for the large environment of temperature variation, be applicable to region wide, the applied environment that regional disparity is large.
Brief description of the drawings
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain other accompanying drawings according to these accompanying drawings.
Figure 1 shows that preparation method's schematic flow sheet of heavy axle load wagon brake shoe friction materials described in the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment.Based on embodiments of the invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to protection scope of the present invention.
Described in the embodiment of the present invention, brake friction material belongs to polymer trielement composite material, in material prescription taking paracril, styrene-butadiene rubber(SBR), resol as bonding system, taking mineral fibre, steel fiber, carbon fiber, polyacrylonitrile slurry pool assorted fibre as enhancement component, taking filler kyanite, graphite, molybdenumdisulphide etc. as frictional property regulator or Synergist S-421 95, to exceed the speed limit and slowly acting accelerator mix proportion promotor component.In formula, optimize each component proportion, make full use of each component property, take into account material and there is good intensity and toughness, meet wagon heavy duty high speed Operational requirements.Specifically, the mass percent of the concrete component of this friction materials is:
6～12 paracril, 1～4 styrene-butadiene rubber(SBR), 3～8 resol, 0.4～1 insoluble sulfur, 0.1～0.6 promotor, 0.1～0.6 solidifying agent, 2～6 carbon black, 8～18 barite, 1～4 kyanite, 17～40 assorted fibre, 7～14 magnesium oxide, 2～6 refinery coke, 2～8 calcium sulfate crystal whiskers, 1～4 molybdenumdisulphide, 1～5 crystalline flake graphite, 1～4 synthetic graphite, 1～4 iron mica and 1～3 antimony sulfide, wherein:
Described promotor comprises tetramethyl-thiuram disulfide TMTD, or the compound accelerant of tetramethylthiuram monosulfide TMTM proportioning compositions different from N-cyclohexyl-2-benzothiazole sulfonamide; So just can ensure that material has good processing performance in banburying process, after material cured, there is good mechanical property;
Above-mentioned solidifying agent can be hexamethylenetetramine.
In specific implementation, described resol is liquid resin, and gel time is 10～15min at 130 DEG C, and at 135 DEG C, non-volatile part is 70～80%.Organic liquid resin can guarantee and powder or particulate material fully infiltrate, ensure intensity and the performance homogeneous of friction materials.
In addition, the mass percent of described assorted fibre main ingredient comprises:
10～25 steel fiber, 5～15 mineral fibre, 1～4 carbon fiber and 1～2 polyacrylonitrile slurry pool; Use assorted fibre fully to use the performance of various fibers, utilized steel fiber thermal conductivity, the snappiness of polyacrylonitrile slurry pool, especially carbon fiber can increase the thermal conductivity of the strength of materials and frictional interface simultaneously.
Described calcium sulfate crystal whiskers has reinforcement, toughness reinforcing and improve the effect of material thermal resistance.
Below in conjunction with accompanying drawing, the embodiment of the present invention is described in further detail, is illustrated in figure 1 preparation method's schematic flow sheet of heavy axle load wagon brake shoe friction materials described in the embodiment of the present invention, described method comprises:
Step 11: by prepare the required each starting material component of friction materials in meshing mixer through rubber refine in advance, banburying heating 3～5 minutes, cleaning, banburying, banburying regulates 3～5 minutes and the step of banburying fragmentation is carried out mixing;
Wherein, the mass percent of each starting material component is:
6～12 paracril, 1～4 styrene-butadiene rubber(SBR), 3～8 resol, 0.4～1 insoluble sulfur, 0.1～0.6 promotor, 0.1～0.6 solidifying agent, 2～6 carbon black, 8～18 barite, 1～4 kyanite, 17～40 assorted fibre, 7～14 magnesium oxide, 2～6 refinery coke, 2～8 calcium sulfate crystal whiskers, 1～4 molybdenumdisulphide, 1～5 crystalline flake graphite, 1～4 synthetic graphite, 1～4 iron mica and 1～3 antimony sulfide.
In above-mentioned mixing process, each starting material component is dropped in Banbury mixer, by engagement property Banbury mixer, each starting material component banburying is heated 3～8 minutes, and banburying regulates 3～5 minutes; In banburying process, temperature is controlled at 80～120 DEG C, pressure-controlling at 2～12Mpa, and the dispersion of materials after banburying is even, stable performance.
In reality, the banburying treating processes of meshing mixer can, by computer controlled automatic, set banburying program in advance, obtains required friction materials in the mode of automatically controlling.
Step 12: the sizing material after mixing end obtains described friction materials through break process after discharging.
In specific implementation process, the process of described break process specifically comprises three grades of break process, wherein:
One-level coarse crushing makes the granularity of compound be less than 200mm after processing;
Secondary coarse crushing makes the granularity of compound be less than 20mm after processing;
After three grades of processing in small, broken bits, make the particle diameter of compound be less than 5mm, and organic binder bond is evenly wrapped in inorganic particle surface.
In addition, in specific implementation, can also utilize prepared friction materials to prepare brake shoe, specifically:
Use described three grades of sizing materials after treatment in small, broken bits to adopt normal temperature pressing process compacting brake shoe, wherein pressing conditions is: use 500 tons of press, exhaust pressure 8MPa～11MPa, exhaust number of times 1～3 time, sizing pressing pressure is 22MPa～25MPa, and the press time is 40s～60s;
Brake shoe after pressing treatment is packed into and in box curing oven, carries out program mode and heat up and solidify, and solidification value and time see the following form shown in 1:
Table 1
And after solidifying and finishing, when in stove, temperature drops to below 80 DEG C, come out of the stove, obtaining described brake shoe finished product, this brake shoe finished product can be used for axle and heavily meets or exceeds the breaking system of 30 tons of lorries.
In sum, the friction materials that the embodiment of the present invention provides can meet required frictional behaviour and the mechanical property of heavy axle load wagon brake shoe, meets railway freight-car heavy duty high speed Operational requirements; And the brake shoe intensity of preparing with this friction materials is high, impelling strength good, there is stable frictional behaviour and good wear resistance; Solve composite brake shoe fracture under heavy duty at a high speed, fallen the defect of piece and the damage to wheel, can, for a long time for the large environment of temperature variation, be applicable to region wide, the applied environment that regional disparity is large.
The above; only for preferably embodiment of the present invention, but protection scope of the present invention is not limited to this, is anyly familiar with in technical scope that those skilled in the art disclose in the present invention; the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (7)
1. a heavy axle load wagon brake shoe friction materials, is characterized in that, the mass percent of the concrete component of described friction materials is:
6～12 paracril, 1～4 styrene-butadiene rubber(SBR), 3～8 resol, 0.4～1 insoluble sulfur, 0.1～0.6 promotor, 0.1～0.6 solidifying agent, 2～6 carbon black, 8～18 barite, 1～4 kyanite, 17～40 assorted fibre, 7～14 magnesium oxide, 2～6 refinery coke, 2～8 calcium sulfate crystal whiskers, 1～4 molybdenumdisulphide, 1～5 crystalline flake graphite, 1～4 synthetic graphite, 1～4 iron mica and 1～3 antimony sulfide, wherein:
Described promotor comprises tetramethyl-thiuram disulfide TMTD, or the compound accelerant of tetramethylthiuram monosulfide TMTM proportioning compositions different from N-cyclohexyl-2-benzothiazole sulfonamide;
Described solidifying agent is hexamethylenetetramine.
2. heavy axle load wagon brake shoe friction materials according to claim 1, is characterized in that,
Described resol is liquid resin, and gel time is 10～15min at 130 DEG C, and at 135 DEG C, non-volatile part is 70～80%.
3. heavy axle load wagon brake shoe friction materials according to claim 1, is characterized in that, the mass percent of described assorted fibre main ingredient comprises:
10～25 steel fiber, 5～15 mineral fibre, 1～4 carbon fiber and 1～2 polyacrylonitrile slurry pool.
4. a preparation method for friction materials for heavy axle load wagon brake shoe, is characterized in that, described method comprises:
By prepare the required each starting material component of friction materials in meshing mixer through rubber refine in advance, banburying heating 3～5 minutes, cleaning, banburying, banburying regulates 3～5 minutes and the step of banburying fragmentation is carried out mixing;
Sizing material after mixing end obtains described friction materials through break process after discharging;
Wherein, the mass percent of each starting material component is:
6～12 paracril, 1～4 styrene-butadiene rubber(SBR), 3～8 resol, 0.4～1 insoluble sulfur, 0.1～0.6 promotor, 0.1～0.6 solidifying agent, 2～6 carbon black, 8～18 barite, 1～4 kyanite, 17～40 assorted fibre, 7～14 magnesium oxide, 2～6 refinery coke, 2～8 calcium sulfate crystal whiskers, 1～4 molybdenumdisulphide, 1～5 crystalline flake graphite, 1～4 synthetic graphite, 1～4 iron mica and 1～3 antimony sulfide.
5. the preparation method of friction materials for heavy axle load wagon brake shoe according to claim 4, is characterized in that, described mixing step specifically comprises:
Each starting material component is dropped in Banbury mixer, by engagement property Banbury mixer, each starting material component banburying is heated 3～8 minutes, and banburying regulates 3～5 minutes;
In banburying process, temperature is controlled at 80～120 DEG C, pressure-controlling at 2～12Mpa.
6. the preparation method of friction materials for heavy axle load wagon brake shoe according to claim 4, is characterized in that, the process of described break process specifically comprises three grades of break process, wherein:
One-level coarse crushing makes the granularity of compound be less than 200mm after processing;
Secondary coarse crushing makes the granularity of compound be less than 20mm after processing;
After three grades of processing in small, broken bits, make the particle diameter of compound be less than 5mm, and organic binder bond is evenly wrapped in inorganic particle surface.
7. the preparation method of friction materials for heavy axle load wagon brake shoe according to claim 6, is characterized in that, after described three grades of processing in small, broken bits, described method also comprises:
Use described three grades of sizing materials after treatment in small, broken bits to adopt normal temperature pressing process compacting brake shoe, wherein pressing conditions is: use 500 tons of press, exhaust pressure 8MPa～11MPa, exhaust number of times 1～3 time, sizing pressing pressure is 22MPa～25MPa, and the press time is 40s～60s;
Brake shoe after pressing treatment is packed into and in box curing oven, carries out program mode and heat up and solidify;
And solidifying after end, when in stove, temperature drops to below 80 DEG C, come out of the stove, obtain described brake shoe finished product.
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| CN105400007A (en) * | 2015-12-02 | 2016-03-16 | 安徽创奇乐智能游乐设备有限公司 | Oil-resistance anti-static composite rubber material |
| CN105400001A (en) * | 2015-12-02 | 2016-03-16 | 安徽创奇乐智能游乐设备有限公司 | High-performance magnetic composite rubber material |
| CN105400000A (en) * | 2015-12-02 | 2016-03-16 | 安徽创奇乐智能游乐设备有限公司 | Rubber composite material with high acid and alkali resistance performance |
| CN105400006A (en) * | 2015-12-02 | 2016-03-16 | 安徽创奇乐智能游乐设备有限公司 | Elastic rubber material applicable to work at high temperature |
| CN105400010A (en) * | 2015-12-02 | 2016-03-16 | 安徽创奇乐智能游乐设备有限公司 | Rubber material for seal ring |
| CN105400005A (en) * | 2015-12-02 | 2016-03-16 | 安徽创奇乐智能游乐设备有限公司 | Composite rubber material good in heat conduction insulating performance |
| CN105384989A (en) * | 2015-12-02 | 2016-03-09 | 安徽创奇乐智能游乐设备有限公司 | Waterproof rubber material |
| CN105400013A (en) * | 2015-12-02 | 2016-03-16 | 安徽创奇乐智能游乐设备有限公司 | High temperature resistance rubber material for vehicles |
| CN105400009A (en) * | 2015-12-02 | 2016-03-16 | 安徽创奇乐智能游乐设备有限公司 | High damping environmentally friendly rubber material |
| CN105400002A (en) * | 2015-12-02 | 2016-03-16 | 安徽创奇乐智能游乐设备有限公司 | High-performance stable rubber material |
| CN105400003A (en) * | 2015-12-02 | 2016-03-16 | 安徽创奇乐智能游乐设备有限公司 | Cold-resistant low temperature resistant rubber material |
| CN105400004A (en) * | 2015-12-02 | 2016-03-16 | 安徽创奇乐智能游乐设备有限公司 | Anti-aging rubber material |
| CN105400011A (en) * | 2015-12-02 | 2016-03-16 | 安徽创奇乐智能游乐设备有限公司 | High-elasticity heat-resistant composite rubber material |
| CN105419018A (en) * | 2015-12-02 | 2016-03-23 | 安徽创奇乐智能游乐设备有限公司 | Composite rubber material with good damping performance |
| CN105440357A (en) * | 2015-12-02 | 2016-03-30 | 安徽创奇乐智能游乐设备有限公司 | Low-noise flame-retardant automobile rubber material |
| CN105462003A (en) * | 2015-12-02 | 2016-04-06 | 安徽创奇乐智能游乐设备有限公司 | Rubber material high in toughness and not prone to breakage |
| CN105384990A (en) * | 2015-12-02 | 2016-03-09 | 安徽创奇乐智能游乐设备有限公司 | High-strength flame-retardant rubber material |
| CN108131409A (en) * | 2017-12-27 | 2018-06-08 | 中铁隆昌铁路器材有限公司 | A kind of locomotive composite brake shoe with great friction coefficient and preparation method thereof |
| CN108458015A (en) * | 2018-01-30 | 2018-08-28 | 湖北飞龙摩擦密封材料股份有限公司 | A kind of drum brake lining |
| CN108458015B (en) * | 2018-01-30 | 2020-01-07 | 湖北飞龙摩擦密封材料股份有限公司 | Drum type brake lining |
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Application publication date: 20141008 |