CN111570790A - POK three-layer composite self-lubricating material and preparation process thereof - Google Patents
POK three-layer composite self-lubricating material and preparation process thereof Download PDFInfo
- Publication number
- CN111570790A CN111570790A CN202010325383.5A CN202010325383A CN111570790A CN 111570790 A CN111570790 A CN 111570790A CN 202010325383 A CN202010325383 A CN 202010325383A CN 111570790 A CN111570790 A CN 111570790A
- Authority
- CN
- China
- Prior art keywords
- pok
- layer
- plastic
- temperature
- self
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/1003—Use of special medium during sintering, e.g. sintering aid
- B22F3/1007—Atmosphere
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/18—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by using pressure rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/02—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite layers
- B22F7/04—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite layers with one or more layers not made from powder, e.g. made from solid metal
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L61/00—Compositions of condensation polymers of aldehydes or ketones; Compositions of derivatives of such polymers
- C08L61/02—Condensation polymers of aldehydes or ketones only
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/02—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite layers
- B22F7/04—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite layers with one or more layers not made from powder, e.g. made from solid metal
- B22F2007/042—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite layers with one or more layers not made from powder, e.g. made from solid metal characterised by the layer forming method
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3009—Sulfides
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Composite Materials (AREA)
- Materials Engineering (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention discloses a POK three-layer composite self-lubricating material and a preparation process thereof, wherein the POK three-layer composite self-lubricating material comprises a metal substrate layer, a spherical copper powder layer and a POK material layer; sintering a spherical copper powder layer on the metal substrate layer by a powder metallurgy method, and compounding a POK material layer on the spherical copper powder layer; the metal substrate layer is one of an iron base, an iron-copper sintered base and a copper base or other existing materials which are suitable for the invention; the spherical copper powder layer is spherical tin bronze powder; the POK material layer is POK plastic. Compared with modified PA66, POM and the like commonly used in traditional three-layer composite self-lubricating materials, the POK serving as the self-lubricating layer has excellent wear resistance, impact resistance, toughness and self-lubricating property, has higher thermal deformation temperature, can be used in a high-temperature environment for a long time, and has the advantages of environmental friendliness and low production cost.
Description
Technical Field
The invention relates to the field of sliding bearings, in particular to a POK three-layer composite self-lubricating material and a preparation process thereof.
Background
The novel self-lubricating composite material is a new material subject generated along with the development of modern science and technology, and has the advantages of rapid development and wide application due to excellent performance in special environment. Self-lubricating materials are generally classified into metal-based self-lubricating materials, non-metal-based self-lubricating materials and ceramic self-lubricating materials. The preparation method is generally a powder metallurgy method and a casting method; in addition, plasma spraying and surface technology are also applied to the preparation of self-lubricating composite materials.
The metal-based self-lubricating composite material is prepared by taking an alloy with higher strength as a matrix and a solid lubricant as a dispersion phase through a certain process. The metal-based self-lubricating composite materials developed at present, such as adding a proper amount of sulfur or selenium and silver-based and copper-based self-lubricating materials into iron-based and nickel-based high-temperature alloys, are applied to a certain degree.
The three-layer composite self-lubricating material is usually a self-lubricating material which comprises a high polymer material layer such as modified PTFE, modified PA66 and modified POM, and the problems of poor toughness, poor wear resistance and the like still commonly exist, the performance is mainly determined by a high polymer material base material, and the improvement of the performance is limited by modifying.
The plate with the surface laid with the high polymer material needs to be sintered, generally by adopting a mesh belt sintering furnace, and is formed by hot rolling. Generally, the temperature of the sintered polymer layer of the material is basically the same as that of the spherical powder plate, and the phenomenon that the temperature of the metal substrate is not matched with that of the polymer layer possibly exists in the rolling process, so that the performance of the product after rolling forming is greatly influenced.
Disclosure of Invention
The invention aims to provide a POK three-layer composite self-lubricating material and a preparation process thereof, and aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a POK three-layer composite self-lubricating material comprises a metal substrate layer, a spherical copper powder layer and a POK material layer; sintering a spherical copper powder layer on the metal substrate layer by a powder metallurgy method, and compounding a POK material layer on the spherical copper powder layer;
the metal substrate layer is one of an iron base, an iron-copper sintered base and a copper base or other existing materials which are suitable for the invention;
the spherical copper powder layer is spherical tin bronze powder;
the POK material layer is POK plastic.
Further, the POK material layer is a modified material with POK plastics as a matrix, when the POK material is a modified material with POK plastics as a matrix, the modified additive can be fillers such as polyphenyl ester, glass fiber, carbon fiber, aramid fiber and the like, can also be inorganic solid self-lubricating materials such as molybdenum disulfide, graphite and the like, and can also be a series of modification aids such as an impact modifier, an antioxidant, a lubricant, a toughening agent, a nucleating agent, a heat stabilizer and the like;
further, when the POK material is a modified material taking POK plastic as a matrix;
the modification formula comprises: POK: 60 to 100 percent;
PTFE: 0-20%, PTFE is acid-resistant, alkali-resistant, various solvents-resistant, high-temperature-resistant, the friction coefficient is extremely low, the antifriction property of the material is mainly improved, the friction factor is reduced, the use temperature of the material is increased, the addition of PTFE can enable the POK to be essentially distinguished in the application process of the self-lubricating material, the antifriction is realized on the basis of wear resistance, and the temperature range of normal operation is increased;
carbon fiber: 0-20%, the carbon fiber mainly improves the wear resistance of the material, reduces the wear loss of the product, and the addition of the carbon fiber can enable the POK self-lubricating material to be used in more and severer environments;
antioxidant: 0-5%, the antioxidant mainly reduces the oxidative decomposition probability of the material and ensures the stability of the material performance;
silicone oil: 0-5 percent of silicone oil is mainly used for improving the antifriction property of the material and reducing friction factors, the viscosity-temperature performance is the best of liquid lubricants, and the proper addition can ensure that the POK self-lubricating material is used in the field with higher load.
Graphite: 0-5% of solid lubricant and the same action as silicone oil.
MoS2: 0-5% of solid lubricant and the same action as silicone oil.
0-3% of toughening agent, and the toughness of the material is increased.
Further, the additive may be PTFE, carbon fiber, antioxidant, silicone oil, graphite, MoS2And a combination of one or more of a toughening agent.
The preparation method of the modified material taking the POK plastic as the matrix comprises the following steps: mixing the raw materials in a plastic mixer, and then mixing and granulating the mixed materials in a double-screw extruder to prepare the modified material taking the POK plastic as the matrix for the three-layer composite material.
The metal substrate layer is generally 0.5-25mm, the ball powder layer is generally 0.1-1mm, and the POK material layer is 0.05-2 mm.
A preparation process of a POK three-layer composite self-lubricating material specifically comprises the following steps:
s1, spreading spherical bronze powder with the thickness of 0.1-1mm on a metal substrate, and sintering the spherical bronze powder into a spherical powder plate in a mesh belt sintering furnace, wherein the sintering temperature is as follows: 800 ℃ and 950 ℃, the time is 0.5-1.5h, the hydrogen-nitrogen mixed atmosphere is protected (the hydrogen content is 20-40 percent), and the flow is 10-30m3/h。
S2, paving a layer of modified POK plastic particles on the spherical powder board obtained by sintering in the step S1, and flatly laying and misplacing the plastic particles and putting the plastic particles into a mesh belt sintering furnace;
the heating temperature of the upper layer of the mesh belt sintering furnace is 200-350 ℃, the heating temperature of the lower layer is 150-350 ℃, the sintering time is 10-20min, and the nitrogen atmosphere is used for protection (the nitrogen flow is 0-50 m)3/h)。
S3, when the plate obtained in the step S2 is discharged from the furnace mouth, the plastic is in a softened state, the plastic is taken out and immediately sent to a rolling mill for rolling to obtain a blank plate, the blank plate is tiled and staggered and then put into a mesh belt sintering furnace for secondary sintering, the heating temperature of the upper layer is 200-,sintering time is 10-20min, nitrogen atmosphere protection (nitrogen flow is 0-50 m)3/h)，
S4, when the plate obtained in the step S3 is discharged from the furnace mouth, the plastic is in a softened state, and the plate is taken out and immediately sent to a rolling mill for rolling to obtain a semi-finished product; the purpose of rolling by the rolling mill is to embed the plastic into the gaps of the spherical bronze powder, so that the binding force is increased, and the purpose of secondary rolling is to ensure that the plastic has enough binding force and the flatness of the plate.
Furthermore, the mesh belt sintering furnace adopts an up-down independent heating mode, so that the requirement of the polymer layer of the product on the temperature in the heating section is met, and different temperature requirements of the polymer layer and the ball powder plate after the product is discharged from the furnace and before the product is rolled are met, so that the performance of the rolled product is kept stable; meanwhile, 2 temperature detection points are arranged after the workpiece is discharged from the furnace, and are used for respectively detecting the temperature of the steel plate and the temperature of the high polymer layer, so that the temperature can be detected and alarmed on line in real time.
Further, the two rolling steps S2-S4 may be light plate or oil pocket, and are generally hot rolling.
Compared with the prior art, the invention has the beneficial effects that:
1. the POK three-layer composite self-lubricating material provided by the invention has excellent wear resistance and self-lubricating property, and belongs to a new material in the field of self-lubricating materials and sliding bearings; compared with a Polyformaldehyde (POM) material, the material has the characteristics of low specific gravity, higher impact toughness resistance, environmental protection and the like, and the wear resistance of the POK is 14 times that of the POM; PA66 has high tensile strength, but low impact strength and elongation, and POK has excellent impact strength and elongation under enough tensile strength, so that the POK material is an excellent self-lubricating bearing fabric;
2. the mesh belt sintering furnace adopts the upper heating and the lower heating to independently control the temperature, and is protected by atmosphere, so that the uniformity of plastic melting can be effectively ensured, the plastic is prevented from being oxidized due to the contact with air in the melting process at a high temperature, and the reduction of material performance caused by oxidative decomposition is reduced. Meanwhile, the temperature of the metal substrate can be matched with that of the polymer layer before rolling, and the product quality is greatly ensured;
3. compared with a plastic bearing, the POK three-layer composite self-lubricating material has stronger bearing capacity; compared with the existing three-layer composite material on the market, the POK has excellent wear resistance in the aspect of performance, and meanwhile, through modification, a more wear-reducing and wear-resisting material can be obtained;
compared with modified PA46, PA66, POM and the like commonly used in traditional three-layer composite self-lubricating materials, the POK adopted by the invention is excellent in wear resistance, impact resistance, toughness and self-lubricating property, has higher thermal deformation temperature, can be used in a high-temperature environment for a long time, and has the advantages of environmental protection, low production cost and the like.
Drawings
Fig. 1 is a schematic structural diagram of a POK three-layer composite self-lubricating material.
Detailed Description
The technical solution of the present patent will be described in further detail with reference to the following embodiments.
Referring to fig. 1, a POK three-layer composite self-lubricating material includes a metal substrate layer 1, a spherical copper powder layer 2 and a POK material layer 3; sintering a spherical copper powder layer on the metal substrate layer by a powder metallurgy method, and compounding a POK material layer 3 on the spherical copper powder layer;
the metal substrate layer is 1.85mm, the ball powder layer is generally 0.30mm, and the POK material layer is 0.35 mm;
the metal substrate layer 1 is a low-carbon steel plate with the mark of SPCC;
the spherical copper powder layer 2 is spherical tin bronze powder with the grade of QFSN8Zn 3;
the POK material layer 3 is POK plastic;
the modification formula comprises: POK: 77.2 percent;
PTFE：15％；
carbon fiber: 5 percent;
0.5 percent of antioxidant;
1.0 percent of silicone oil;
0.8 percent of graphite and 0.5 percent of toughening agent
The preparation method of the modified material taking the POK plastic as the matrix comprises the following steps: mixing the raw materials in a plastic mixer, and then mixing and granulating the mixed materials in a double-screw extruder to prepare the modified material taking the POK plastic as the matrix for the three-layer composite material
The POK plastic is engineering plastic with all main chains composed of carbon, has a high-crystallinity and firm crystal structure, and shows impact resistance, wear resistance, chemical resistance, fuel resistance and gas barrier property; has the following characteristics of balance between rigidity and toughness: the material has high toughness, sufficient tensile strength and flexural modulus and balanced performance; impact strength: compared with Nylon, the impact strength of PBT is 230% higher. And resistance to hydrolysis. The tensile strength and the impact strength are kept high under a wet condition, and the elongation is high; heat distortion temperature: HDT is 200 ℃, and can be used for a long time in a high-temperature environment; chemical resistance: the superior chemical resistance is next to PPS. Water and vapor resistance; barrier properties: a hydrocarbon compound. The permeability test of lead-free gasoline at 93 ℃ for 15 days is superior to that of teflon, and the gas barrier is equivalent to that of EVOH; the friction performance is as follows: the abrasion resistance is 14 times of that of POM, and the noise is low; production efficiency: the polyketone of high crystallinity contributes to shortening the molding cycle.
A preparation process of a POK three-layer composite self-lubricating material specifically comprises the following steps: laying a layer of POK or modified POK plastic particles on a metal substrate sintered with spherical tin bronze powder, putting the POK or modified POK plastic particles into a mesh belt sintering furnace, heating and melting the POK or modified POK plastic particles to a semi-molten state, directly putting the POK or modified POK plastic particles into a rolling mill after discharging the POK or modified POK plastic particles from the furnace, cutting off the edge excess materials after rolling, putting the POK or modified POK plastic particles into the mesh belt sintering furnace again for;
the rolling of the rolling mill enables the plastic to be embedded into the gaps of the spherical bronze powder, so that the binding force is increased; the two rolling steps can be light plates or oil holes, and are generally hot rolling.
A preparation process of a POK three-layer composite self-lubricating material specifically comprises the following steps:
s1, spreading spherical bronze powder with the thickness of 0.32mm on a metal substrate (low-carbon steel plate) (after rolling a finished product, rolling the spherical bronze powder plate by 0.02mm), putting the spherical bronze powder plate into a mesh belt sintering furnace, and sintering at the temperature: 920 ℃, the time is 1.0h, the hydrogen and nitrogen mixed atmosphere protection (35 percent hydrogen gas) is carried out, and the flow rate is 25m3/h。
S2, paving a layer of modified POK plastic particles on the spherical powder board obtained by sintering in the step S1, and flatly laying and misplacing the plastic particles and putting the plastic particles into a mesh belt sintering furnace;
the mesh belt sintering furnace adopts an up-down independent heating mode, so that the requirement of a high polymer layer on the temperature of a product in a heating section is required to be met, different temperature requirements of the high polymer layer and a ball powder plate after the product is discharged from the furnace and before the product is rolled are also required to be met, and the performance of the rolled product is kept stable;
meanwhile, 2 temperature detection points are arranged after the workpiece is discharged from the furnace, and are used for respectively detecting the temperature of the steel plate and the temperature of the high polymer layer, so that the temperature can be detected and alarmed on line in real time.
Heating the upper layer of the mesh belt sintering furnace at 250 ℃, heating the lower layer at 300 ℃, sintering for 20min, and protecting in nitrogen atmosphere (the nitrogen flow is 20 m)3/h)。
S3, when the plate obtained in the step S2 is discharged from the furnace mouth, the plastic is in a softened state, the plastic is taken out and immediately sent to a rolling mill for rolling to obtain a blank plate, the blank plate is flatly laid and staggered and then put into a mesh belt sintering furnace for secondary sintering, the upper layer heating temperature is 250 ℃, the lower layer heating temperature is 300 ℃, the sintering time is 20min, and the protection of nitrogen atmosphere (the nitrogen flow is 20 m)3/h)，
S4, when the plate obtained in the step S3 is discharged from the furnace mouth, the plastic is in a softened state, and the plate is taken out and immediately sent to a rolling mill for rolling to obtain a semi-finished product; the rolling of the rolling mill aims to embed the plastic into the gaps of the spherical bronze powder, so that the binding force is increased, the secondary rolling aims to ensure that the plastic has enough binding force and plate flatness, and the two-pass rolling is provided with oil pits.
The POK three-layer composite self-lubricating material prepared by the method has the maximum content of not more than 30N/(mm)2S) was continuously loaded on the specimen until the stress reached 140MPa, held for 10S, and unloaded. The sample was taken out from the testing machine, allowed to stand for 30min, and the deformation was measured to be 0.02 mm.
The sample was subjected to an end face friction wear test at a speed of 0.4m/s under a pressure of 3.5MPa, and after 3 hours of the test, the POK material had a coefficient of friction of 0.032 and a wear loss of 0.004 mm.
The test results show that the preparation process of the POK three-layer composite self-lubricating material has feasibility, and the material has excellent lubricating property and wear resistance.
Although the preferred embodiments of the present patent have been described in detail, the present patent is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present patent within the knowledge of those skilled in the art.
Claims (10)
1. A POK three-layer composite self-lubricating material is characterized by comprising a metal substrate layer, a spherical copper powder layer and a POK material layer; sintering a spherical copper powder layer on the metal substrate layer by a powder metallurgy method, and compounding a POK material layer on the spherical copper powder layer;
the metal substrate layer is one of an iron base, an iron-copper sintered base and a copper base or other existing materials which are suitable for the invention;
the spherical copper powder layer is spherical tin bronze powder;
the POK material layer is POK plastic.
2. The POK three-layer composite self-lubricating material as claimed in claim 1, wherein the POK material layer is a modified material with POK plastics as a matrix, and when the POK material is a modified material with POK plastics as a matrix, the modified additive may be a filler such as polyphenyl ester, glass fiber, carbon fiber, aramid fiber and the like, or an inorganic solid self-lubricating material such as molybdenum disulfide, graphite and the like, or a series of modification aids such as an impact modifier, an antioxidant, a lubricant, a toughening agent, a nucleating agent, a heat stabilizer and the like.
3. The POK three-layer composite self-lubricating material as claimed in claim 2, wherein when the POK material is a modified material taking POK plastic as a matrix, the modification formula is as follows:
POK：60-100％；
PTFE: 0-20%, PTFE is acid-resistant, alkali-resistant, various solvents-resistant, high-temperature-resistant, the friction coefficient is extremely low, the antifriction property of the material is mainly improved, the friction factor is reduced, the use temperature of the material is increased, the addition of PTFE can enable the POK to be essentially distinguished in the application process of the self-lubricating material, the antifriction is realized on the basis of wear resistance, and the temperature range of normal operation is increased;
carbon fiber: 0-20%, the carbon fiber mainly improves the wear resistance of the material, reduces the wear loss of the product, and the addition of the carbon fiber can enable the POK self-lubricating material to be used in more and severer environments;
antioxidant: 0-5%, the antioxidant mainly reduces the oxidative decomposition probability of the material and ensures the stability of the material performance;
silicone oil: 0-5 percent of silicone oil is mainly used for improving the antifriction property of the material and reducing friction factors, the viscosity-temperature performance is the best of liquid lubricants, and the proper addition can ensure that the POK self-lubricating material is used in the field with higher load.
Graphite: 0-5% of solid lubricant and the same action as silicone oil.
MoS2: 0-5% of solid lubricant and the same action as silicone oil.
0-3% of toughening agent, and the toughness of the material is increased.
4. The POK three-layer composite self-lubricating material as claimed in claim 3, wherein the additive is PTFE, carbon fiber, antioxidant, silicone oil, graphite, MoS2And a combination of one or more of a toughening agent.
5. The POK three-layer composite self-lubricating material as claimed in claim 2, wherein the preparation method of the modified material taking POK plastic as a matrix comprises the following steps: mixing the raw materials in a plastic mixer, and then mixing and granulating the mixed materials in a double-screw extruder to prepare the modified material taking the POK plastic as the matrix for the three-layer composite material.
6. The POK three-layer composite self-lubricating material as claimed in claim 1, wherein the metal substrate layer is generally 0.5-25mm, the ball powder layer is generally 0.1-1mm, and the POK material layer is generally 0.05-2 mm.
7. A preparation process of a POK three-layer composite self-lubricating material is characterized by comprising the following steps:
s1, spreading spherical bronze powder with the thickness of 0.1-1mm on a metal substrate, and sintering the spherical bronze powder into a spherical powder plate in a mesh belt sintering furnace, wherein the sintering temperature is as follows: 800 ℃ and 950 ℃ for 0.5-1.5h, the hydrogen-nitrogen mixed atmosphere is used for protection (20-40% hydrogen), and the flow rate is 10-30m3/h；
S2, paving a layer of modified POK plastic particles on the spherical powder plate obtained by sintering in the step S1, and flatly laying and misplacing the modified POK plastic particles and putting the modified POK plastic particles into a mesh belt sintering furnace; the heating temperature of the upper layer of the mesh belt sintering furnace is 200-350 ℃, the heating temperature of the lower layer is 150-350 ℃, the sintering time is 10-20min, and the nitrogen atmosphere is used for protection (the nitrogen flow is 0-50 m)3/h)；
S3, when the plate obtained in the step S2 is taken out from the furnace mouth, the plastic is in a softened state, the plastic is taken out and immediately sent to a rolling mill for rolling to obtain a blank plate, the blank plate is tiled and staggered and then put into a mesh belt sintering furnace for secondary sintering, the upper layer heating temperature is 200-3/h)；
S4, when the plate obtained in the step S3 is discharged from the furnace mouth, the plastic is in a softened state, and the plate is taken out and immediately sent to a rolling mill for rolling to obtain a semi-finished product; the purpose of rolling by the rolling mill is to embed the plastic into the gaps of the spherical bronze powder, so that the binding force is increased, and the purpose of secondary rolling is to ensure that the plastic has enough binding force and the flatness of the plate.
8. The preparation process of the POK three-layer composite self-lubricating material according to claim 7, wherein the mesh belt sintering furnace adopts an up-down independent heating mode, so that not only the requirement of a high molecular layer of a product on temperature in a heating section needs to be met, but also different temperature requirements of the high molecular layer and a ball powder plate after the product is discharged from the furnace and before the product is rolled are met, and the performance of the rolled product is kept stable.
9. The preparation process of the POK three-layer composite self-lubricating material according to claim 7, wherein the mesh belt sintering furnace is provided with 2 temperature detection points after a workpiece is discharged from the furnace, and the temperature of the steel plate and the temperature of the polymer layer are respectively detected, so that the temperature on-line real-time detection and alarm are realized.
10. The process for preparing a POK three-layer composite self-lubricating material according to claim 7, wherein the two rolling steps in the steps S2-S4 can be light plate or oil hole, and are generally hot rolling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010325383.5A CN111570790A (en) | 2020-04-23 | 2020-04-23 | POK three-layer composite self-lubricating material and preparation process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010325383.5A CN111570790A (en) | 2020-04-23 | 2020-04-23 | POK three-layer composite self-lubricating material and preparation process thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111570790A true CN111570790A (en) | 2020-08-25 |
Family
ID=72090098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010325383.5A Pending CN111570790A (en) | 2020-04-23 | 2020-04-23 | POK three-layer composite self-lubricating material and preparation process thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111570790A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115339171A (en) * | 2022-07-22 | 2022-11-15 | 嘉善双飞润滑材料有限公司 | Three-layer composite material of shaft sleeve for oil pump and preparation method thereof |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01502267A (en) * | 1986-12-30 | 1989-08-10 | ホールズワース アンド アソシエイツ プロプライエタリー リミテッド | Improvements in or relating to the formation of metal alkoxides and metal powders by the use of microwave radiation |
| CN1400094A (en) * | 2001-08-01 | 2003-03-05 | 中国科学院兰州化学物理研究所 | Plastics steel back self-lubricating wear-resisting composite material and its preparation method |
| CN1827689A (en) * | 2004-12-21 | 2006-09-06 | 德古萨公司 | Polyarylene ether ketone powder, molding containing the same and method for preparing the same |
| CN101437905A (en) * | 2006-01-26 | 2009-05-20 | 齐奥姆公司 | Powder thermal spray compositions composing at least two thermoplastics |
| CN107325483A (en) * | 2017-07-06 | 2017-11-07 | 长沙五犇新材料科技有限公司 | A kind of heat resistant and wear resistant composite, preparation method and application |
| CN108641281A (en) * | 2018-04-11 | 2018-10-12 | 启东海大聚龙新材料科技有限公司 | A kind of poly(aryl ether ketone) wear-resistant material and preparation method thereof |
| CN109482872A (en) * | 2018-12-28 | 2019-03-19 | 江西洪达自润滑轴承有限公司 | A kind of oil-free plane sliding bearing and preparation method thereof with extremely low coefficient of friction |
| CN109666857A (en) * | 2018-12-28 | 2019-04-23 | 江西洪达自润滑轴承有限公司 | A kind of plane sliding bearing and preparation method thereof with extremely low coefficient of friction |
| CN109910399A (en) * | 2019-02-28 | 2019-06-21 | 浙江长盛滑动轴承股份有限公司 | Wash-resistant and abrasion-resistant self-lubricating material, composite plate based on polyketone and preparation method thereof |
| CN110815994A (en) * | 2019-10-23 | 2020-02-21 | 嘉善双飞润滑材料有限公司 | Three-layer composite self-lubricating material and continuous production process thereof |
-
2020
- 2020-04-23 CN CN202010325383.5A patent/CN111570790A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01502267A (en) * | 1986-12-30 | 1989-08-10 | ホールズワース アンド アソシエイツ プロプライエタリー リミテッド | Improvements in or relating to the formation of metal alkoxides and metal powders by the use of microwave radiation |
| CN1400094A (en) * | 2001-08-01 | 2003-03-05 | 中国科学院兰州化学物理研究所 | Plastics steel back self-lubricating wear-resisting composite material and its preparation method |
| CN1827689A (en) * | 2004-12-21 | 2006-09-06 | 德古萨公司 | Polyarylene ether ketone powder, molding containing the same and method for preparing the same |
| CN101437905A (en) * | 2006-01-26 | 2009-05-20 | 齐奥姆公司 | Powder thermal spray compositions composing at least two thermoplastics |
| CN107325483A (en) * | 2017-07-06 | 2017-11-07 | 长沙五犇新材料科技有限公司 | A kind of heat resistant and wear resistant composite, preparation method and application |
| CN108641281A (en) * | 2018-04-11 | 2018-10-12 | 启东海大聚龙新材料科技有限公司 | A kind of poly(aryl ether ketone) wear-resistant material and preparation method thereof |
| CN109482872A (en) * | 2018-12-28 | 2019-03-19 | 江西洪达自润滑轴承有限公司 | A kind of oil-free plane sliding bearing and preparation method thereof with extremely low coefficient of friction |
| CN109666857A (en) * | 2018-12-28 | 2019-04-23 | 江西洪达自润滑轴承有限公司 | A kind of plane sliding bearing and preparation method thereof with extremely low coefficient of friction |
| CN109910399A (en) * | 2019-02-28 | 2019-06-21 | 浙江长盛滑动轴承股份有限公司 | Wash-resistant and abrasion-resistant self-lubricating material, composite plate based on polyketone and preparation method thereof |
| CN110815994A (en) * | 2019-10-23 | 2020-02-21 | 嘉善双飞润滑材料有限公司 | Three-layer composite self-lubricating material and continuous production process thereof |
Non-Patent Citations (2)
| Title |
|---|
| 李建军: "《塑料配方设计》", 31 May 2019, 中国轻工业出版社 * |
| 王海斗等: "《固体润滑膜层技术与应用》", 31 March 2009, 国防工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115339171A (en) * | 2022-07-22 | 2022-11-15 | 嘉善双飞润滑材料有限公司 | Three-layer composite material of shaft sleeve for oil pump and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101533458B1 (en) | Sliding bearing having improved consume resistivity and manufacturing method thereof | |
| CN100504091C (en) | Polymer self-lubricating thin layer composite axle sleeve and its preparation method | |
| CN101544080B (en) | Metal and plastic composite self-lubricating material and preparation method thereof | |
| CN101573543B (en) | Bearing having improved consume resistivity and manufacturing method thereof | |
| CN101074702B (en) | Lead-free self-lubricating bearing and its production | |
| CN102094146B (en) | Novel high-temperature resistant self-lubricating sliding bearing material and preparation method thereof | |
| CN101871058A (en) | Metal-based self-lubricating composite material and preparation method thereof | |
| CN108326316A (en) | A kind of leadless copper base bimetal wear resistant material and preparation method thereof | |
| CN111570790A (en) | POK three-layer composite self-lubricating material and preparation process thereof | |
| CN102785428A (en) | Wear resistant and self-lubricating PPS (polyphenylene sulfide)-metallic composite and preparation method thereof | |
| WO2010071373A2 (en) | Sintered bush | |
| Ning et al. | Study on mechanical and tribological properties of ternary fluororubber filled with four needles of zinc oxide | |
| US3882030A (en) | Self-lubricating bearing elements | |
| CN100364718C (en) | Method for preparing sliding bearing of nano AI2O3/polyimide friction compound material | |
| CN102925808A (en) | High-temperature self-lubricating material for manufacturing bearings and preparation method thereof | |
| CN104878272A (en) | Nickel aluminum/copper oxide high-temperature self-lubricating composite material and preparation method thereof | |
| CN111196074B (en) | Preparation method of multi-scale micro-nano filler modified self-lubricating fabric liner composite material | |
| CN101468394A (en) | Method for preparing metal-based high temperature resistant self-lubricating material for high vacuum | |
| JPH03500328A (en) | bearing | |
| CN111748719A (en) | Wide-temperature-range self-lubricating VN-Ag2MoO4Composite material and preparation method thereof | |
| CN108775340B (en) | Self-lubricating bearing filled with solidified solid lubricating material and preparation method thereof | |
| CN111961944B (en) | Wide-temperature-range self-lubricating VN-AgMoS2Composite material and preparation method thereof | |
| JP5566394B2 (en) | Bearing material | |
| CN107674351A (en) | Wear-resisting dust-free area sealing strip PTFE resin composite and preparation method thereof | |
| CN114749658A (en) | Preparation method of composite rare earth element reinforced powder metallurgy friction material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200825 |
|
| RJ01 | Rejection of invention patent application after publication |