CN105174973A - Additive for raw material mixing process of ceramic friction material, and preparation method thereof - Google Patents
Additive for raw material mixing process of ceramic friction material, and preparation method thereof Download PDFInfo
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Abstract
The present invention relates to the technical field of ceramic friction material additives, especially to an additive for the raw material mixing process of a ceramic friction material, and a preparation method thereof. According to the present invention, ceramic loose cotton, carbon fibers, potassium titanate fibers, hogwash oil, diesel oil, paint and coal powder are subjected to reasonable ratio design so as to make the ceramic loose cotton, the carbon fibers and the potassium titanate fibers in the prepared additive be subjected to the microscopic chemical reaction, enhance the toughness of the carbon fibers, the potassium titanate fibers and the ceramic loose cotton, and improve the surface activity, and the subsequent preparation process is combined so as to make the materials in the additive be uniformly dispersed, make the treatment degree deep, and make the surface activity of the ceramic loose cotton, the carbon fibers and the potassium titanate fibers and the internal structure toughness be improved, such that the friction coefficient and the wear rate of the ceramic friction material are improved, the defect of easy slipping of the ceramic friction material is prevented, and the safety is improved.
Description
Technical field
The present invention relates to ceramic frication material additive technology field, especially a kind of additive for ceramic frication material raw material mixing process and preparation method thereof.
Background technology
Ceramic frication material due to the excellent specific property of himself brake field obtain in a big way with the application in larger layers face, and then make in brake field, the defect that traditional easy burn into of pure metal braking device skids and frictional behaviour is poor is resolved, and makes obtain prolongation the work-ing life of friction materials, but, along with the development of ceramic frication material, the proportioning of ceramic frication material, ceramic frication material frictional behaviour is carried out above formula, as static and dynamic friction coefficient ratio, wear rate, the improvement of thermostability etc. has become a difficult problem for comparatively difficulty, and then make the static and dynamic friction coefficient of most of ceramic frication material maintain between 85-91%, and wear rate constantly increases along with temperature, it presents the trend constantly increased, and the amplitude increased is relatively large, namely the thermostability being exactly ceramic frication material is poor, and then shorten the work-ing life of ceramic frication material, and because the thermostability of existing ceramic frication material is poor, and then toughness is at low ambient temperatures poor, hardness is higher, abrasion resistance is stronger, and then cause ceramic frication material easily to skid in braking procedure, cause potential safety hazard.
Based on this, this investigator breaks away from traditional research bottleneck, from stupalith preparation process, special reaction basis in raw material mixing process, the characteristic of the whole raw material of modification is carried out by adopting the mode of additive in raw material mixing process, the mass permanence of ceramic frication material is improved with this, improve the static and dynamic friction coefficient ratio of ceramic frication material, reduce wear rate, especially increasing along with temperature is reduced, the amplitude that wear rate wearing and tearing amplitude increases, and then make the thermostability of ceramic frication material obtain enhancing and improve, for ceramic frication material preparing technical field provides new approaches.
Summary of the invention
In order to solve the above-mentioned technical problem existed in prior art, the invention provides a kind of additive for ceramic frication material raw material mixing process and preparation method thereof.
Be achieved particular by following technical scheme:
A kind of additive for ceramic frication material raw material mixing process, its material composition counts ceramic loose wool 3-7 part with mass parts, carbon fiber 0.3-0.9 part, potassium titanate fiber 0.1-0.7 part, sewer oil 1-3 part, diesel oil 3-7 part, paint 1-3 part, coal dust 1-7 part, wherein ceramic loose wool is by chamotte 10-20 mass parts, aluminum oxide powder 9-11 mass parts, ground silica 5-9 mass parts, chromium sand 1-3 mass parts is after temperature is 300-500 DEG C of process 20-30min, again by it in electric furnace after melting treatment, tumbling machine is adopted to get rid of into fibrous silk, obtain with condensers collection cotton again.
Described material composition counts ceramic loose wool 5 parts, 0.6 part, carbon fiber, potassium titanate fiber 0.4 part, sewer oil 2 parts, diesel oil 5 parts, paint 2 parts, coal dust 3 parts with mass parts.
Described ceramic loose wool, its raw material is chamotte 15 mass parts, aluminum oxide powder 10 mass parts, ground silica 7 mass parts, chromium sand 2 mass parts.
Described ceramic loose wool, its preparation method is by after chamotte, aluminum oxide powder, ground silica, the mixing of chromium sand, 300-500 DEG C will be adopted again to process 20-30min after, adopt ultrasonication 10-20s again, add the clarification liming accounting for mixture 1-3% more wherein, sent into again in electric furnace, adopt the temperature melting treatment of 2000-4000 DEG C, raw material is made to form fluid in electric furnace, the vacuum tightness that controled environment by this fluid employing tumbling machine is again get rid of into filamental under 0.02-0.08MPa, adopt condensers to carry out collecting cotton process again, can obtain.
Described ultrasonic frequency is 300-3000Hz.
Object two of the present invention is to provide a kind of preparation method of the additive for ceramic frication material raw material mixing process, comprises the following steps:
(1) ceramic loose wool is adopted sewer oil immersion treatment, and in immersion process, add the coal dust of 1/3rd wherein, and to adjust temperature be 300-500 DEG C, vacuum tightness is 0.02-0.08MPa, and adopt ultrasonication 20-30min, ultrasonic frequency is 50-90Hz;
(2) by carbon fiber diesel oil immersion treatment, and in immersion process, add the coal dust of 1/3rd, and to adjust temperature be 50-70 DEG C, vacuum tightness is 0.02-0.08MPa, and adopt ultrasonication 10-15min, ultrasonic frequency is 120-150Hz;
(3) potassium titanate fiber is adopted paint immersion treatment, and in immersion process, remaining coal dust is added wherein, and to adjust temperature be 140-160 DEG C, vacuum tightness is 0.02-0.08MPa, and adopt ultrasonication 20-40s, ultrasonic frequency is 500-800Hz;
(4) by step 1), step 2), step 3) material handled well adds in tempering tank, and the temperature adjusting tempering tank is 600-900 DEG C, stirring velocity is 1000-3000r/min stir process 10-20s, in 10-20s, adjust temperature is again 100-300 DEG C, and adopt ultrasonic frequency to be 1000-2000Hz process 10-20s, in 1-10min, adjust temperature is again 40-70 DEG C, and employing stirring speed is 100-300r/min stir process, and add the water accounting for amount of the mixture 1-3% wherein, wherein the temperature of water is 5-10 DEG C, after stir process 3-5min, obtain additive.
Compared with prior art, technique effect of the present invention is embodied in:
By by ceramic loose wool, carbon fiber, potassium titanate fiber, sewer oil, diesel oil, paint, coal dust carries out rational proportion design, and then make in the additive of preparation, pottery loose wool, there is mi-crochemistry reaction each other in carbon fiber and potassium titanate fiber, and then make carbon fiber, potassium titanate fiber, the toughness of pottery loose wool is enhanced, surfactivity improves, again in conjunction with the preparation technology of subsequent additive, make the material dispersion in additive even, degree for the treatment of is darker, and then make ceramic loose wool, carbon fiber, the surfactivity of potassium titanate fiber and the toughness of internal structure are all improved, and then guarantee the raw material mixing process being joined ceramic frication material, and then there is mutual effect between the raw material facilitating ceramic frication material, and then improve the toughness of ceramic frication material, hardness, improve the frictional coefficient of ceramic frication material, wear rate, and the defect further preventing ceramic frication material easily to skid, improve security.
The present invention is through experimental design, using the additive of above-mentioned preparation as the additive in ceramic frication material raw material mixing process, it is the preparation of the carbon base ceramics friction plate of CN201410431083 according to the patent No., and then static and dynamic friction coefficient comparison ratio is carried out to the carbon base ceramics friction plate that the carbon base ceramics friction plate prepared and the patent No. are CN201410431083, wear rate contrast and the contrast of braking 100 skidding number of times, its result as shown in table 1 (following experiment be between 100-350 DEG C every the value range that 50 DEG C of amplitudes increase progressively:
Table 1
Can be drawn by above-mentioned experimental result, after adding additive of the present invention, the static and dynamic friction coefficient of the friction plate drawn improves 4 percentage points than at least, and wear rate has been reduced to 0.05 × 10
-7cm
3/ N.m, and its probability skidded is reduced largely, improve the security of brake(-holder) block braking, also reduce the wear rate in brake(-holder) block braking procedure, and from the value range that wear rate changes, it is stronger from the thermostability between 100-350 DEG C simultaneously, toughness is more excellent, friction resistant performance is more excellent, and then its work-ing life is longer, improves the quality of ceramic frication material.
Further, the present invention, based in above-mentioned additive preparation process, also by reasonably designing the preparation technology of ceramic loose wool and the proportioning of raw material, and then making the ceramic loose wool of preparing can meet additive demand, improve the quality of additive.
Embodiment
Below in conjunction with concrete embodiment, further restriction is done to technical scheme of the present invention, but claimed scope is not only confined to done description.
Embodiment 1
A kind of additive for ceramic frication material raw material mixing process, its material composition is ceramic loose wool 3kg, carbon fiber 0.3kg, potassium titanate fiber 0.1kg, sewer oil 1kg, diesel oil 3kg, paint 1kg, coal dust 1kg in mass, wherein ceramic loose wool be by chamotte 10 mass parts, aluminum oxide powder 9 mass parts, ground silica 5 mass parts, chromium sand 1 mass parts temperature be 300 DEG C process 20min after, again by it in electric furnace after melting treatment, adopted tumbling machine to get rid of into fibrous silk, then obtained with condensers collection cotton.
For the preparation method of the additive of ceramic frication material raw material mixing process, comprise the following steps:
(1) ceramic loose wool is adopted sewer oil immersion treatment, and in immersion process, add the coal dust of 1/3rd wherein, and to adjust temperature be 300 DEG C, vacuum tightness is 0.02MPa, and adopt ultrasonication 20min, ultrasonic frequency is 50Hz;
(2) by carbon fiber diesel oil immersion treatment, and in immersion process, add the coal dust of 1/3rd, and to adjust temperature be 50 DEG C, vacuum tightness is 0.02MPa, and adopt ultrasonication 10min, ultrasonic frequency is 120Hz;
(3) potassium titanate fiber is adopted paint immersion treatment, and in immersion process, to be added wherein by remaining coal dust, and to adjust temperature be 140 DEG C, vacuum tightness is 0.02MPa, and adopt ultrasonication 20s, ultrasonic frequency is 500Hz;
(4) by step 1), step 2), step 3) material handled well adds in tempering tank, and the temperature adjusting tempering tank is 600 DEG C, stirring velocity is 1000r/min stir process 10s, in 10s, adjust temperature is again 100 DEG C, and adopt ultrasonic frequency to be 1000Hz process 10s, in 1min, adjust temperature is again 40 DEG C, and employing stirring speed is 100r/min stir process, and add the water accounting for amount of the mixture 1% wherein, wherein the temperature of water is 5 DEG C, after stir process 3min, obtain additive.
Embodiment 2
A kind of additive for ceramic frication material raw material mixing process, its material composition is ceramic loose wool 7kg, carbon fiber 0.9kg, potassium titanate fiber 0.7kg, sewer oil 3kg, diesel oil 7kg, paint 3kg, coal dust 7kg in mass, wherein ceramic loose wool be by chamotte 20 mass parts, aluminum oxide powder 11 mass parts, ground silica 9 mass parts, chromium sand 3 mass parts temperature be 500 DEG C process 30min after, again by it in electric furnace after melting treatment, adopted tumbling machine to get rid of into fibrous silk, then obtained with condensers collection cotton.
Described ceramic loose wool, its concrete preparation method is by after chamotte, aluminum oxide powder, ground silica, the mixing of chromium sand, again by after employing 500 DEG C process 30min, adopt ultrasonication 10s again, add the clarification liming accounting for mixture 1% more wherein, sent into again in electric furnace, adopt the temperature melting treatment of 2000 DEG C, raw material is made to form fluid in electric furnace, the vacuum tightness that controled environment by this fluid employing tumbling machine is again get rid of into filamental under 0.02MPa, adopt condensers to carry out collecting cotton process again, can obtain.
Described ultrasonic frequency is 300Hz.
For the preparation method of the additive of ceramic frication material raw material mixing process, comprise the following steps:
(1) ceramic loose wool is adopted sewer oil immersion treatment, and in immersion process, add the coal dust of 1/3rd wherein, and to adjust temperature be 500 DEG C, vacuum tightness is 0.08MPa, and adopt ultrasonication 30min, ultrasonic frequency is 90Hz;
(2) by carbon fiber diesel oil immersion treatment, and in immersion process, add the coal dust of 1/3rd, and to adjust temperature be 70 DEG C, vacuum tightness is 0.08MPa, and adopt ultrasonication 15min, ultrasonic frequency is 150Hz;
(3) potassium titanate fiber is adopted paint immersion treatment, and in immersion process, to be added wherein by remaining coal dust, and to adjust temperature be 160 DEG C, vacuum tightness is 0.08MPa, and adopt ultrasonication 40s, ultrasonic frequency is 800Hz;
(4) by step 1), step 2), step 3) material handled well adds in tempering tank, and the temperature adjusting tempering tank is 900 DEG C, stirring velocity is 3000r/min stir process 20s, in 20s, adjust temperature is again 300 DEG C, and adopt ultrasonic frequency to be 2000Hz process 20s, in 10min, adjust temperature is again 70 DEG C, and employing stirring speed is 300r/min stir process, and add the water accounting for amount of the mixture 3% wherein, wherein the temperature of water is 10 DEG C, after stir process 5min, obtain additive.
Embodiment 3
A kind of additive for ceramic frication material raw material mixing process, its material composition is ceramic loose wool 5kg, carbon fiber 0.6kg, potassium titanate fiber 0.4kg, sewer oil 2kg, diesel oil 5kg, paint 2kg, coal dust 3kg in mass, wherein ceramic loose wool be by chamotte 15 mass parts, aluminum oxide powder 10 mass parts, ground silica 7 mass parts, chromium sand 2 mass parts temperature be 400 DEG C process 25min after, again by it in electric furnace after melting treatment, adopted tumbling machine to get rid of into fibrous silk, then obtained with condensers collection cotton.
Described ceramic loose wool, its concrete preparation method is by after chamotte, aluminum oxide powder, ground silica, the mixing of chromium sand, again by after employing 400 DEG C process 25min, adopt ultrasonication 20s again, add the clarification liming accounting for mixture 3% more wherein, sent into again in electric furnace, adopt the temperature melting treatment of 4000 DEG C, raw material is made to form fluid in electric furnace, the vacuum tightness that controled environment by this fluid employing tumbling machine is again get rid of into filamental under 0.08MPa, adopt condensers to carry out collecting cotton process again, can obtain.
Described ultrasonic frequency is 3000Hz.
For the preparation method of the additive of ceramic frication material raw material mixing process, comprise the following steps:
(1) ceramic loose wool is adopted sewer oil immersion treatment, and in immersion process, add the coal dust of 1/3rd wherein, and to adjust temperature be 400 DEG C, vacuum tightness is 0.06MPa, and adopt ultrasonication 25min, ultrasonic frequency is 70Hz;
(2) by carbon fiber diesel oil immersion treatment, and in immersion process, add the coal dust of 1/3rd, and to adjust temperature be 60 DEG C, vacuum tightness is 0.06MPa, and adopt ultrasonication 13min, ultrasonic frequency is 130Hz;
(3) potassium titanate fiber is adopted paint immersion treatment, and in immersion process, to be added wherein by remaining coal dust, and to adjust temperature be 150 DEG C, vacuum tightness is 0.06MPa, and adopt ultrasonication 30s, ultrasonic frequency is 600Hz;
(4) by step 1), step 2), step 3) material handled well adds in tempering tank, and the temperature adjusting tempering tank is 700 DEG C, stirring velocity is 2000r/min stir process 15s, in 15s, adjust temperature is again 200 DEG C, and adopt ultrasonic frequency to be 1500Hz process 15s, in 7min, adjust temperature is again 50 DEG C, and employing stirring speed is 200r/min stir process, and add the water accounting for amount of the mixture 2% wherein, wherein the temperature of water is 7 DEG C, after stir process 4min, obtain additive.
Claims (6)
1. the additive for ceramic frication material raw material mixing process, it is characterized in that, its material composition counts ceramic loose wool 3-7 part with mass parts, carbon fiber 0.3-0.9 part, potassium titanate fiber 0.1-0.7 part, sewer oil 1-3 part, diesel oil 3-7 part, paint 1-3 part, coal dust 1-7 part, wherein ceramic loose wool is by chamotte 10-20 mass parts, aluminum oxide powder 9-11 mass parts, ground silica 5-9 mass parts, chromium sand 1-3 mass parts is after temperature is 300-500 DEG C of process 20-30min, again by it in electric furnace after melting treatment, tumbling machine is adopted to get rid of into fibrous silk, obtain with condensers collection cotton again.
2. as claimed in claim 1 for the additive of ceramic frication material raw material mixing process, it is characterized in that, described material composition counts ceramic loose wool 5 parts, 0.6 part, carbon fiber, potassium titanate fiber 0.4 part, sewer oil 2 parts, diesel oil 5 parts, paint 2 parts, coal dust 3 parts with mass parts.
3., as claimed in claim 1 for the additive of ceramic frication material raw material mixing process, it is characterized in that, described ceramic loose wool, its raw material is chamotte 15 mass parts, aluminum oxide powder 10 mass parts, ground silica 7 mass parts, chromium sand 2 mass parts.
4. the additive for ceramic frication material raw material mixing process as described in claim 1 or 3, it is characterized in that, described ceramic loose wool, its preparation method is by chamotte, aluminum oxide powder, ground silica, after the mixing of chromium sand, 300-500 DEG C will be adopted again to process 20-30min after, adopt ultrasonication 10-20s again, add the clarification liming accounting for mixture 1-3% more wherein, sent into again in electric furnace, adopt the temperature melting treatment of 2000-4000 DEG C, raw material is made to form fluid in electric furnace, the vacuum tightness that controled environment by this fluid employing tumbling machine is again get rid of into filamental under 0.02-0.08MPa, condensers is adopted to carry out collecting cotton process again, can obtain.
5., as claimed in claim 4 for the additive of ceramic frication material raw material mixing process, it is characterized in that, described ultrasonic frequency is 300-3000Hz.
6. the preparation method of the additive for ceramic frication material raw material mixing process as described in any one of claim 1-5, is characterized in that, comprise the following steps:
(1) ceramic loose wool is adopted sewer oil immersion treatment, and in immersion process, add the coal dust of 1/3rd wherein, and to adjust temperature be 300-500 DEG C, vacuum tightness is 0.02-0.08MPa, and adopt ultrasonication 20-30min, ultrasonic frequency is 50-90Hz;
(2) by carbon fiber diesel oil immersion treatment, and in immersion process, add the coal dust of 1/3rd, and to adjust temperature be 50-70 DEG C, vacuum tightness is 0.02-0.08MPa, and adopt ultrasonication 10-15min, ultrasonic frequency is 120-150Hz;
(3) potassium titanate fiber is adopted paint immersion treatment, and in immersion process, remaining coal dust is added wherein, and to adjust temperature be 140-160 DEG C, vacuum tightness is 0.02-0.08MPa, and adopt ultrasonication 20-40s, ultrasonic frequency is 500-800Hz;
(4) by step 1), step 2), step 3) material handled well adds in tempering tank, and the temperature adjusting tempering tank is 600-900 DEG C, stirring velocity is 1000-3000r/min stir process 10-20s, in 10-20s, adjust temperature is again 100-300 DEG C, and adopt ultrasonic frequency to be 1000-2000Hz process 10-20s, in 1-10min, adjust temperature is again 40-70 DEG C, and employing stirring speed is 100-300r/min stir process, and add the water accounting for amount of the mixture 1-3% wherein, wherein the temperature of water is 5-10 DEG C, after stir process 3-5min, obtain additive.
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Citations (5)
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| CN1670113A (en) * | 2005-04-07 | 2005-09-21 | 武汉优耐特摩擦材料有限公司 | Friction material for vehicles without asbestos and metal |
| CN103527683A (en) * | 2013-10-18 | 2014-01-22 | 江苏祥龙摩擦材料有限公司 | Novel metal-free carbon ceramic disc brake block and manufacturing method thereof |
| CN103836095A (en) * | 2013-10-27 | 2014-06-04 | 姜著川 | Heavy truck brake pad with man-made skeleton as framework and manufacturing method thereof |
| CN104235242A (en) * | 2014-08-28 | 2014-12-24 | 万山特区宏安摩擦材料有限公司 | Carbon-based ceramic brake block and preparing method of carbon-based ceramic brake block |
| CN105038101A (en) * | 2015-07-31 | 2015-11-11 | 山东大学 | Cellulose-reinforcement disc-adhesion-prevention squeaking-prevention abrasion-resistant braking material and preparation method thereof |
-
2015
- 2015-09-01 CN CN201510555488.9A patent/CN105174973B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1670113A (en) * | 2005-04-07 | 2005-09-21 | 武汉优耐特摩擦材料有限公司 | Friction material for vehicles without asbestos and metal |
| CN103527683A (en) * | 2013-10-18 | 2014-01-22 | 江苏祥龙摩擦材料有限公司 | Novel metal-free carbon ceramic disc brake block and manufacturing method thereof |
| CN103836095A (en) * | 2013-10-27 | 2014-06-04 | 姜著川 | Heavy truck brake pad with man-made skeleton as framework and manufacturing method thereof |
| CN104235242A (en) * | 2014-08-28 | 2014-12-24 | 万山特区宏安摩擦材料有限公司 | Carbon-based ceramic brake block and preparing method of carbon-based ceramic brake block |
| CN105038101A (en) * | 2015-07-31 | 2015-11-11 | 山东大学 | Cellulose-reinforcement disc-adhesion-prevention squeaking-prevention abrasion-resistant braking material and preparation method thereof |
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