Method for producing carbon/carbon skid of magnetic suspension train
A technology of a maglev train and a manufacturing method, which is applied to brake parts, electric vehicles, vehicle parts, etc., can solve the problems of failure of skid function, low thermal conductivity, low interlaminar shear strength, etc., and achieves improved interlaminar shear. strength, improve wear resistance, improve the effect of interlaminar shear strength and thermal conductivity
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Embodiment 1
[0024] (1) Acupuncture carbon cloth and carbon fiber composite structure quasi-three-dimensional structure prefabricated body, the thickness of the needle-punched carbon cloth is 2-4mm, and the remaining thickness is needle-punched long carbon fiber, and the needle-punched long carbon fiber and fiber in the prefabricated body The weight percentage of net tire is about 75%: 25%.
[0025] (2) Put the prefabricated body into the negative pressure directional flow gas-phase carbon precipitation furnace, adopt the isothermal CVI densification process, the temperature is 1000°C, the pressure in the furnace is 10KPa, and the carbon source gas (C 3 h 6 ) with a flow rate of 100L / h, after 300 hours of densification treatment, a pyrolytic carbon matrix is formed.
[0026] (3) with the porous carbon / carbon body in the vacuum-pressure impregnation tank, the weight of impregnated furfurone resin is 120kg, and adding the SiC ultrafine powder of 6kg (5% of furfurone resin) by weight perce...
Embodiment 2
[0030] (1) Acupunctured carbon cloth and carbon fiber composite structure quasi-three-dimensional structure prefabricated body, which is made of alternately laminated needled carbon cloth and fiber mesh tires, with a thickness of 6-8mm, and the remaining thickness is needled long carbon fiber and fiber The mesh tires are alternately laminated, and the thickness is 25mm. The weight percentage of the needle-punched long carbon fiber and the fiber mesh tire in the preform is 78%:22%.
[0031] (2) Put the prefabricated body into the negative pressure directional flow gas-phase carbon precipitation furnace, adopt the isothermal CVI compaction process, the temperature is 900-1100 °C, the pressure in the furnace is 5KPa, and the carbon source gas (C 3 h 6 ) with a flow rate of 2000L / h, after 500 hours of densification treatment, a pyrolytic carbon matrix is formed.
[0032] (3) the porous charcoal / charcoal green body is in the vacuum-pressure impregnation tank, the furfurone resin...
Embodiment 3
[0036] (1) Acupunctured carbon cloth and carbon fiber composite structure quasi-three-dimensional structure prefabricated body, which is made of alternately laminated needled carbon cloth and fiber mesh tires, with a thickness of 8-10mm, and the rest is needled long carbon fiber and fiber The mesh tires are alternately laminated, and the thickness is 30mm. The weight percentage of the needle-punched long carbon fiber and the fiber mesh tire in the preform is about 85%:15%.
[0037] (2) Put the prefabricated body into the negative pressure directional flow gas-phase carbon precipitation furnace, adopt the isothermal CVI compaction process, the temperature is 950-1200 °C, the pressure in the furnace is 5KPa, and the carbon source gas (C 3 h 6 ) with a flow rate of 3000L / h, after 300-500 hours of densification treatment, a pyrolytic carbon matrix is formed.
[0038] (3) impregnating 80kg of furfuryl ketone resin with the porous carbon / carbon body in a vacuum-pressure impregnat...
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