Hybrid fiber reinforced ceramic based friction material and preparation method and application thereof
A technology of mixed fibers and friction materials, applied in friction linings, chemical instruments and methods, mechanical equipment, etc., can solve the problems of easy corrosion, loud braking noise, easy damage to the dual disc, etc., and achieve good high temperature resistance, manufacturing The effect of low dynamic noise and reduction of production cost
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[0021] The present invention also provides a preparation method of the above-mentioned hybrid fiber reinforced ceramic-based friction material, including:
[0022] Ingredients: Weigh the raw materials according to the ratio;
[0023] Mixing: The present invention adopts a mixing machine for mixing, puts the weighed raw materials into a high-speed mixing machine, and mixes for 4 to 6 minutes.
[0024] Compression forming: the present invention adopts a two-step method of cold pressing forming-hot pressing solidification, pouring the mixed material into a cold pressing mold, and keeping the pressure at a pressure of 140-160 MPa for 10-15 seconds. The cold-pressed and solidified mixture is placed in a hot-pressing mold, and the pressure is maintained at 155-165°C and 30-50 MPa, and the air is released according to the thickness of the hybrid fiber-reinforced ceramic-based friction material during the pressure-holding process. Preferably, each deflation time is 60 s / mm, and the d...
Embodiment 1
[0029] This embodiment provides a hybrid fiber-reinforced ceramic-based friction material and its preparation method, including:
[0030] In terms of weight percentage, take mixed fiber 10%, fly ash 48%, cashew nut shell oil modified phenolic resin 12%, nitrile rubber 3%, cryolite 6%, molybdenum disulfide 2%, graphite 7%, four Iron oxide 7%, copper powder 5%. The hybrid fibers include alumina fibers and zirconia fibers in a mass ratio of 1:1.
[0031] Weigh each component material according to the above weight ratio, and adopt the two-step method of cold pressing forming-hot pressing curing, including:
[0032] Put the weighed materials into the conical barrel mixer, and mix the materials for 4 minutes; pour the weighed mixture into the cold compression mold, the pressure is 142MPa, and the pressure holding time is 11s; put the cold-pressed samples into the hot In the compression mold, under the conditions of temperature 155°C and pressure 30MPa, hold the pressure for 12 min...
Embodiment 2
[0034] This embodiment provides a hybrid fiber-reinforced ceramic-based friction material and its preparation method, including:
[0035]In terms of weight percentage, weigh 20% of mixed fiber, 42% of fly ash, 8% of cashew shell oil modified phenolic resin, 4% of nitrile rubber, 6% of cryolite, 3% of molybdenum disulfide, 7% of graphite, four Iron oxide 5%, copper powder 5%. The hybrid fibers include alumina fibers and zirconia fibers in a mass ratio of 5:1.
[0036] Weigh each component material according to the above weight ratio, and adopt the two-step method of cold pressing forming-hot pressing curing, including:
[0037] Put the weighed materials into the conical barrel mixer, and mix the materials for 5 minutes; pour the weighed mixture into the cold compression mold, the pressure is 150MPa, and the pressure holding time is 12s; put the cold-pressed samples into the hot In the compression mold, under the condition of temperature of 160°C and pressure of 40MPa, hold th...
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