Summary of the invention
Technology of the present invention is dealt with problems and is: overcome the deficiencies in the prior art part, a kind of airplane carbon brake disc of double element carbon matrix optimum organization is provided, the carbon/carbon brake disc that adopts this method manufacturing is ended to take off (RTO) and friction factor is big during the hygrometric state brake, braking ability good at aircraft, and cost is low.
Technical solution of the present invention is: the airplane carbon brake disc manufacture method of double element carbon matrix optimum organization, its characteristics are to comprise the following steps:
(1) will pack in the negative pressure oriented flow in the heat gradient gaseous phase deposition stove as the whole carbon dish precast body of carbon/carbon brake disc Moving plate, pack in the outer heat gradient gaseous phase deposition stove of negative pressure oriented flow as the whole carbon dish precast body of the quiet dish of carbon/carbon brake disc and final quotaion, regulate charcoal dish precast body low temperature surface temperature and temperature gradient, and press the flow that the precast body gross mass is adjusted carbon-source gas, make its oriented flow through the precast body surface, through 300~600 hours gas-phase carbon depositions, can obtain rough laminar microstructure pyrolytic carbon dish matrix;
(2) with above-mentioned pyrolytic carbon dish matrix through resin impregnation-charing densified, obtain to contain the double base charcoal dish matrix of resin charcoal;
(3) above-mentioned double base charcoal dish matrix is handled through high temperature graphitization again, can be obtained the airplane carbon brake disc material of percent opening less than 10% carbon/carbon brake disc material double element carbon matrix optimum organization.
The temperature of charcoal dish precast body low temperature face is controlled at 800 ℃~1000 ℃ scopes in the described step (1), and temperature gradient is 30 ℃~380 ℃ scopes.
The rough laminar microstructure pyrolytic carbon dish matrix weight percentage that is deposited in the described step (1) is 55%~65%.
The weight percentage of the resin charcoal that is obtained in the described step (2) is 5%~15%.
The high temperature processing graphitization temperature is 2100 ℃~2400 ℃ in the described step (3).
The present invention compared with prior art has following beneficial effect:
(1) effective combination of double element carbon matrix makes aircraft when RTO brakes, and has high frictional behavior and good braking ability, usually than the best carbon/carbon brake disc raising 20%~30% of braking ability in the world.
(2) the resin charcoal of double element carbon matrix has good sealing of hole characteristic, makes the percent opening of carbon/carbon brake disc be lower than 10%, and the braking ability of charcoal dish improves hygrometric state braking ability 30% usually when having improved the brake of aircraft hygrometric state.
(3) optimum organization of double element carbon matrix has reduced the wear rate of charcoal dish, has improved charcoal dish working life.
(4) resin impregnation-charing densification is compared with CVI technology, has shortened the manufacture cycle, has reduced cost, and can improve the density of charcoal dish.
Embodiment
Embodiment 1
(1) with weight percentage be 30% as in the heat gradient gaseous phase deposition stove in the negative pressure oriented flow of packing into of the integral prefabricated body of no latitude charcoal cloth acupuncture of carbon/carbon brake disc Moving plate, with weight percentage is that 30% the integral prefabricated body of no latitude charcoal cloth acupuncture as the quiet dish of carbon/carbon brake disc and final quotaion is packed in the outer heat gradient gaseous phase deposition stove of negative pressure oriented flow, and the temperature of controlling above-mentioned whole charcoal dish precast body low temperature face is 800 ℃, the temperature gradient of high temperature face and low temperature face is 30 ℃, and presses the precast body gross mass and adjust carbon-source gas C
3H
6Flow, can be 2.6m
3/ h, oriented flow are through the surface of charcoal dish precast body, and the deposit carbon process through 300 hours can obtain rough laminar microstructure pyrolytic carbon matrix, and its weight percentage is 55%;
(2) with above-mentioned pyrolytic carbon dish matrix through furfural acetone resin dipping-charing densified, its weight percentage of control resin charcoal reaches 5%, promptly obtains to contain the double base charcoal dish matrix of resin charcoal;
(3) above-mentioned double base charcoal dish is handled through high temperature graphitization, its temperature is 2100 ℃, can obtain the airplane carbon brake disc material of high frictional behavior double element carbon matrix optimum organization.
Embodiment 2
(1) with weight percentage be 30% as in the heat gradient gaseous phase deposition stove in the negative pressure oriented flow of packing into of the integral prefabricated body of no latitude charcoal cloth acupuncture of carbon/carbon brake disc Moving plate, with weight percentage is that 30% the integral prefabricated body of no latitude charcoal cloth acupuncture as the quiet dish of carbon/carbon brake disc and final quotaion is packed in the outer heat gradient gaseous phase deposition stove of negative pressure oriented flow, and the temperature of controlling above-mentioned whole charcoal dish precast body low temperature face is 1000 ℃, the temperature gradient of high temperature face and low temperature face is 380 ℃, and presses the precast body gross mass and adjust carbon-source gas C
3H
6Flow, can be 4.0m
3/ h, oriented flow are through the surface of charcoal dish precast body, and the deposit carbon process through 600 hours can obtain rough laminar microstructure pyrolytic carbon matrix, and its weight percentage is 65%;
(2) with above-mentioned pyrolytic carbon dish matrix through furfural acetone resin dipping-charing densified, its weight percentage of control resin charcoal reaches 15%, promptly obtains to contain the double base charcoal dish matrix of resin;
(3) above-mentioned double base charcoal dish is handled through high temperature graphitization, its temperature is 2400 ℃, can obtain the airplane carbon brake disc material of high frictional behavior double element carbon matrix optimum organization.
Embodiment 3
(1) with weight percentage be 30% as in the heat gradient gaseous phase deposition stove in the negative pressure oriented flow of packing into of the integral prefabricated body of no latitude charcoal cloth acupuncture of carbon/carbon brake disc Moving plate, with weight percentage is that 30% the integral prefabricated body of no latitude charcoal cloth acupuncture as the quiet dish of carbon/carbon brake disc and final quotaion is packed in the outer heat gradient gaseous phase deposition stove of negative pressure oriented flow, and the temperature of controlling whole charcoal dish precast body low temperature face is 900 ℃, the temperature gradient of high temperature face and low temperature face is 200 ℃, and presses the precast body gross mass and adjust carbon-source gas C
3H
6Flow, can be 3.0m
3/ h, oriented flow are through the surface of charcoal dish precast body, and the deposit carbon process through 450 hours can obtain rough laminar microstructure pyrolytic carbon matrix, and its weight percentage is 60%;
(2) with above-mentioned pyrolytic carbon dish matrix through furfural acetone resin dipping-charing densified, its weight percentage of control resin charcoal reaches 10%, promptly obtains to contain the double base charcoal dish matrix of resin;
(3) above-mentioned double base charcoal dish is handled through high temperature graphitization, its temperature is 2300 ℃, can obtain the airplane carbon brake disc material of high frictional behavior double element carbon matrix optimum organization.
As shown in Figure 1, the outer heat gradient gaseous phase deposition stove of negative pressure oriented flow described in the present invention is by bell 1, graphite cover plate 3 and on insulation quilt 2, graphite heater 5 and be positioned at its outside insulation quilt 6, be positioned at the copper induction coil 4 of insulation quilt 6, charcoal dish precast body 7, Graphite pad 8, thermocouple 9, thermal insulation layer 10, graphite supporting plate 11, graphite carriage 12, insulation quilt 13, furnace bottom 14, suction tude 15, insulation quilt 16, interior water cooling plant 17, external furnace body 18, bleeder hole 19 is formed, interior water cooling plant 17 is arranged on the furnace bottom 14 and the internal diameter of charcoal dish precast body 7, and by the temperature difference outside the regulating thickness charcoal dish precast body 7 of the thermal insulation layer 16 that is positioned at water cooling plant 17 outsides; Also fixing and suction tude 15 and graphite carriage 12 on furnace bottom 14, graphite supporting plate 11 is contained on the graphite carriage 12, and thickness is the thermal insulation layer 10 of 30mm-50mm on it.The charcoal dish precast body 7 of on thermal insulation layer 10, packing into, and separate with uniform thickness Graphite pad 8, the thickness of Graphite pad is 0.5mm-4.0mm, constitutes carbon-source gas directional flow passage; Fixing temperature thermocouple 9 also on furnace bottom 14, and enter in the stove from charcoal dish precast body 7 inboards, and at the middle part curved 90 ° of angles are extended down to outer ledge from the inboard of precast body 7.