Friction material and preparation method thereof
A friction material and raw material technology, applied in the direction of friction linings, mechanical equipment, etc., can solve the problems of semi-metallic brake pads, such as easy corrosion, high copper fiber density, and easy corrosion and oxidation, and achieve excellent mechanical properties, high friction coefficient, Inexpensive effect
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[0061] Correspondingly, the present invention also provides a preparation method of the above friction material, comprising the following steps: step a) dispersing halloysite nanotubes in 0.01-0.15 mol / L nitric acid solution to obtain 0.1-0.5 g / mL The mixed solution is ultrasonically treated, then transferred to a hydrothermal reaction kettle for 5-10 hours at 120-180°C, cooled, filtered, washed, and dried; step b) the halloysite nanotubes and iron-zinc alloys obtained in step a Powder, polyetheretherketone, tungsten sulfide, molybdenum sulfide, spherical graphite, carbonyl nickel powder, zirconium carbide, tantalum carbide and phenolic resin are mixed, stirred, placed in a hot pressing mold at 160-180°C under the condition of 15-20MPa Keep for 30-50s, exhaust 2-5 times in the middle, then treat for the first time at 160-180°C for 2-5 hours, raise the temperature to 250-300°C for the second time for 0.5-3 hours, cool down to room temperature, and get friction material.
[0062]...
Embodiment 1
[0068] 1) First prepare a 0.05mol / L nitric acid solution, then weigh a certain amount of halloysite and disperse it into the nitric acid solution to form a mixture with a concentration of 0.3g / mL, and transfer it to a hydrothermal reaction kettle after ultrasonic treatment for 5 hours treated at 150°C for 6h, cooled to room temperature, filtered and washed with deionized water, and dried at 110°C for 15h;
[0069] 2) Weigh and mix the materials according to the following proportions
[0070] Iron-zinc alloy powder 5wt%, polyetheretherketone 5wt%, tungsten sulfide 0.9wt%, molybdenum sulfide accounted for 0.5wt% of the total mass, spherical graphite accounted for 8wt% of the total mass, carbonyl nickel powder accounted for 4wt% of the total mass, carbonized Zirconium accounts for 5wt% of the total mass, tantalum carbide accounts for 3wt% of the total mass, phenolic resin accounts for 3.5wt% of the total mass, and the rest is halloysite nanotubes prepared in step 1). Put the abo...
Embodiment 2
[0078] 1) First prepare a 0.15mol / L nitric acid solution, then weigh a certain amount of halloysite and disperse it into the nitric acid solution to form a mixture with a concentration of 0.5g / mL, and transfer it to the hydrothermal reaction kettle after ultrasonic treatment for 1h treated at 180°C for 5h, cooled to room temperature, filtered and washed with deionized water, and dried at 150°C for 8h;
[0079] 2) Weigh and mix the materials according to the following proportions
[0080] Iron-zinc alloy powder 10wt%, polyether ether ketone 2wt%, tungsten sulfide 0.5wt%, molybdenum sulfide accounted for 0.8wt% of the total mass, spherical graphite accounted for 15wt% of the total mass, carbonyl nickel powder accounted for 2wt% of the total mass, carbonized Zirconium accounts for 6wt% of the total mass, tantalum carbide accounts for 6wt% of the total mass, phenolic resin accounts for 5wt% of the total mass, and the rest is halloysite nanotubes prepared in step 1). Put the above...
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