Self-lubricating composite material and preparation method thereof

Abstract

The invention provides a self-lubricating composite material and a preparation method thereof, and mainly relates to the field of self-lubricating materials. The self-lubricating composite material can solve the problems of self-lubrication and narrow use temperature range of materials. The self-lubricating composite material mainly comprises a base material, a solid lubricant, graphene and a coupling agent, wherein the base material comprises the following components in percentage by mass: 48% of titanium, 46% of aluminum, 2% of chromium, 2% of niobium, 1% of boron and 1% of magnesium; the mass of the solid lubricant is 5-10% of the mass of the base material; the mass of the graphene is 50-80% of the mass of the solid lubricant; and the mass of the coupling agent is 80-120% of the mass of the graphene. The self-lubricating composite material has the advantages of wider effective lubricating temperature range, higher wear resistance, higher oxidation resistance and higher corrosion resistance; and the dust falling in the wear process of the fitting prepared from the self-lubricating composite material is the composite solid lubricant, thereby achieving the self-lubricating effect.

Description

technical field

[0001] The invention relates to the field of self-lubricating materials, in particular to a self-lubricating composite material and a preparation method thereof. Background technique

[0002] Solid lubricants are some solid powders or monolithic materials added between bearing surfaces to reduce friction and wear. It is an important part of the field of tribology. Solid lubricants have a wide temperature range, strong bearing capacity, good anti-stick-slip properties, high vacuum resistance, radiation resistance, anti-corrosion and dust-proof. Light in weight, small in size, and small in aging time, can reduce maintenance time and cost. The use of solid lubricants enriches the lubrication technology and plays an irreplaceable role in reducing the wear of equipment.

[0003] Compared with traditional grease lubricants, solid lubricants have obvious advantages in the field of high temperature friction resistance, but as research has found, single solid lubric...

Examples

preparation example Construction

[0026] The present invention also provides a kind of preparation method of self-lubricating composite material, it comprises the steps:

[0027] Step 1. After mixing titanium powder, aluminum powder, chromium powder, niobium powder, boron powder, magnesium powder and solid lubricant, add it to a vacuum ball mill tank for ball milling. Alcohol is used as a dispersant. The ball-to-material ratio is 12:1. 150~250r / min, ball milling time 12~15h;

[0028] Step 2, the slurry obtained after ball milling is screened and washed with a 200-400 mesh stainless steel sieve;

[0029] Step 3, drying the material obtained after screening, washing and filtering in a vacuum state;

[0030] Step 4. Add graphene and coupling agent to the powder obtained after drying and mix thoroughly, and place the mixed powder in an ultrasonic device for processing for 30 minutes;

[0031] Step 5. Add the powder obtained in step 4 into a graphite mold, and put it into a spark plasma sintering equipment for si...

Embodiment 1

[0050] According to the mass percentage: 48% titanium, 46% aluminum, 2% chromium, 2% niobium, 1% boron, and 1% magnesium, each raw material is used to make the matrix raw material, and a solid lubricant with 5% mass of the matrix raw material is added to the matrix raw material , the solid lubricant is zinc oxide, mix the above powder materials evenly and put them into the vacuum ball mill tank of the planetary ball mill, add a small amount of alcohol as a dispersant, the ball-to-material ratio is 12:1, and the grinding balls are WC carbide balls. The rotating speed is 150r / min, and the ball milling time is 12 hours.

[0051] The mixed slurry made after ball milling is sieved and filtered with a 200-mesh stainless steel sieve. The number of times of sieving and filtering is 4 times. The material obtained after sieving and filtering is dried under vacuum at a drying temperature of 80 ℃, drying time is 12 hours. Graphite is put into microwave heater and carries out microwave he...

Embodiment 2

[0054] According to the mass percentage: 48% titanium, 46% aluminum, 2% chromium, 2% niobium, 1% boron, and 1% magnesium, each raw material is used to make the matrix raw material, and a solid lubricant with 6% mass of the matrix raw material is added to the matrix raw material , the solid lubricant is tungsten disulfide and zinc oxide, the mass ratio of tungsten disulfide to zinc oxide is 1:4, mix the above powder materials evenly and put them into the vacuum ball mill tank of planetary ball mill, add a small amount of alcohol as a dispersant , the ball-to-material ratio is 12:1, the grinding balls are WC carbide balls, the rotational speed is 200r / min, and the ball milling time is 13 hours.

[0055] The mixed slurry made after ball milling is sieved and filtered with a 300-mesh stainless steel sieve. The number of times of sieving and filtering is 5 times. The material obtained after sieving and filtering is dried in a vacuum state, and the drying temperature is 80 ℃, drying...

technical field

[0001] The invention relates to the field of self-lubricating materials, in particular to a self-lubricating composite material and a preparation method thereof. Background technique

[0002] Solid lubricants are some solid powders or monolithic materials added between bearing surfaces to reduce friction and wear. It is an important part of the field of tribology. Solid lubricants have a wide temperature range, strong bearing capacity, good anti-stick-slip properties, high vacuum resistance, radiation resistance, anti-corrosion and dust-proof. Light in weight, small in size, and small in aging time, can reduce maintenance time and cost. The use of solid lubricants enriches the lubrication technology and plays an irreplaceable role in reducing the wear of equipment.

[0003] Compared with traditional grease lubricants, solid lubricants have obvious advantages in the field of high temperature friction resistance, but as research has found, single solid lubric...

Examples

preparation example Construction

[0026] The present invention also provides a kind of preparation method of self-lubricating composite material, it comprises the steps:

[0027] Step 1. After mixing titanium powder, aluminum powder, chromium powder, niobium powder, boron powder, magnesium powder and solid lubricant, add it to a vacuum ball mill tank for ball milling. Alcohol is used as a dispersant. The ball-to-material ratio is 12:1. 150~250r / min, ball milling time 12~15h;

[0028] Step 2, the slurry obtained after ball milling is screened and washed with a 200-400 mesh stainless steel sieve;

[0029] Step 3, drying the material obtained after screening, washing and filtering in a vacuum state;

[0030] Step 4. Add graphene and coupling agent to the powder obtained after drying and mix thoroughly, and place the mixed powder in an ultrasonic device for processing for 30 minutes;

[0031] Step 5. Add the powder obtained in step 4 into a graphite mold, and put it into a spark plasma sintering equipment for si...

Embodiment 1

[0050] According to the mass percentage: 48% titanium, 46% aluminum, 2% chromium, 2% niobium, 1% boron, and 1% magnesium, each raw material is used to make the matrix raw material, and a solid lubricant with 5% mass of the matrix raw material is added to the matrix raw material , the solid lubricant is zinc oxide, mix the above powder materials evenly and put them into the vacuum ball mill tank of the planetary ball mill, add a small amount of alcohol as a dispersant, the ball-to-material ratio is 12:1, and the grinding balls are WC carbide balls. The rotating speed is 150r / min, and the ball milling time is 12 hours.

[0051] The mixed slurry made after ball milling is sieved and filtered with a 200-mesh stainless steel sieve. The number of times of sieving and filtering is 4 times. The material obtained after sieving and filtering is dried under vacuum at a drying temperature of 80 ℃, drying time is 12 hours. Graphite is put into microwave heater and carries out microwave he...

Embodiment 2

[0054] According to the mass percentage: 48% titanium, 46% aluminum, 2% chromium, 2% niobium, 1% boron, and 1% magnesium, each raw material is used to make the matrix raw material, and a solid lubricant with 6% mass of the matrix raw material is added to the matrix raw material , the solid lubricant is tungsten disulfide and zinc oxide, the mass ratio of tungsten disulfide to zinc oxide is 1:4, mix the above powder materials evenly and put them into the vacuum ball mill tank of planetary ball mill, add a small amount of alcohol as a dispersant , the ball-to-material ratio is 12:1, the grinding balls are WC carbide balls, the rotational speed is 200r / min, and the ball milling time is 13 hours.

[0055] The mixed slurry made after ball milling is sieved and filtered with a 300-mesh stainless steel sieve. The number of times of sieving and filtering is 5 times. The material obtained after sieving and filtering is dried in a vacuum state, and the drying temperature is 80 ℃, drying...

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