CN104893194B - A kind of polytetrafluoroethylene (PTFE) based self lubricated composite material of interface adaptation regulation and control and preparation method thereof - Google Patents
A kind of polytetrafluoroethylene (PTFE) based self lubricated composite material of interface adaptation regulation and control and preparation method thereof Download PDFInfo
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- CN104893194B CN104893194B CN201510234156.0A CN201510234156A CN104893194B CN 104893194 B CN104893194 B CN 104893194B CN 201510234156 A CN201510234156 A CN 201510234156A CN 104893194 B CN104893194 B CN 104893194B
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- 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
- C08K3/02—Elements
- C08K3/08—Metals
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- 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
- C08K3/02—Elements
- C08K3/04—Carbon
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- 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
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- 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
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/0856—Iron
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- 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
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/0862—Nickel
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- 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
Abstract
The invention discloses polytetrafluoroethylene (PTFE) based self lubricated composite material of a kind of interface adaptation regulation and control and preparation method thereof, it is using the polytetrafluoroethylene (PTFE) with self-lubricating property as matrix, soft magnetic materials FeNi alloy powders are added in matrix by certain mass fraction, it is well mixed using the method for mechanical blending, is obtained after cold pressing, sintering.The composite of the present invention has excellent tribological property, in friction, can be according to the formation of its frictional interface transfer membrane of actual condition automatic adjusument, reach the optimum condition needed for friction, it is stable, adapt in underloading and middle carrier strip part, slip antifriction parts, sliding bearing, seal etc. can be made, the fields such as machinery, petrochemical industry, Aero-Space are can apply to.
Description
Technical field
The present invention relates to the polytetrafluoroethyl-ne of self-lubricating composite technical field, more particularly to a kind of regulation and control of interface adaptation
Alkenyl self-lubricating composite.
Background technology
Polytetrafluoroethylene (PTFE) (PTFE) has that coefficient of friction is low, self-lubricating, that chemical stability is high, high and low temperature resistance is good etc. is excellent
Point, is the important antifriction material such as current mechanical industry, auto industry, food industry, instrument and meter, space flight and aviation.Although
PTFE has excellent performance, but there is also some shortcomings, especially anti-wear performance are poor.It is generally necessary to using metal oxide,
Glass fibre, nano-ceramic particle etc. are filled modification, improve its wearability, and this method has obtained large-scale application, but
It is to wait to strengthen in terms of the self regulating and control of frictional interface.
The content of the invention
The present invention proposes polytetrafluoroethylene (PTFE) based self lubricated composite material and its preparation side of a kind of interface adaptation regulation and control
Method, products obtained therefrom coefficient of friction is small, and wearability is good, can be according to its interfacial migration of actual condition automatic adjusument in friction
The formation of film, reaches the optimum condition needed for friction.
The present invention solves technical problem, adopts the following technical scheme that：
The polytetrafluoroethylene (PTFE) based self lubricated composite material of interface adaptation regulation and control of the present invention, its feature is：It is described compound
The proportioning of each raw material of material by weight percent is：
FeNi alloys 1-40%；
Polytetrafluoroethylene (PTFE) 50-98%；
Other fillers 1-10%；
Other described fillers include graphite, MoS2Or the one or more in oxide filler.
Preferably, the proportioning of each raw material of the composite by weight percent is：
FeNi alloys 1-20%；
Polytetrafluoroethylene (PTFE) 72-97%；
Other fillers 2-8%；
It is highly preferred that the proportioning of each raw material of the composite by weight percent is：
FeNi alloys 15%；
Polytetrafluoroethylene (PTFE) 80%；
Other fillers 5%.
Preferably, the granularity of the FeNi alloys and other fillers is 30-500 mesh, it is furthermore preferred that the FeNi alloys
Granularity with other fillers is 100-200 mesh.
The invention also provides the preparation side of the polytetrafluoroethylene (PTFE) based self lubricated composite material of above-mentioned interface adaptation regulation and control
Method, comprises the following steps：
S1, weighing：Each raw material is weighed by proportioning；
S2, batch mixing：Each raw material is well mixed, compound is obtained；
S3, cold pressing：The compound is put into compacting tool set, compacting tool set is then put into hydraulic press, in 55-
Pressurize 6-10min is molded in the range of 65MPa, obtains being cold-pressed part after release；
Or the compound is coated with bimetal plate, required according to specific product, carry out sheet material automatic rolling roller
It is molded, obtain cold pressing part；
S4, sintering：The cold pressing part is put into sintering furnace, in N2Protection under, be warming up to 220-260 DEG C, be incubated 15-
25min, then it is warming up to 300-340 DEG C, 20-35min is incubated, is finally warming up to after 380-400 DEG C, insulation 180-220min, drop
To room temperature, gained sintered part is the polytetrafluoroethylene (PTFE) based self lubricated composite material of the interface adaptation regulation and control.
Compared with the prior art, the present invention has the beneficial effect that：
The present invention is by adding FeNi alloy packings so that friction induction magnetic can occur in friction process for composite
Change, this effect changes with friction condition, while can be effectively facilitated frictional interface transfer membrane using this effect
Formed, be that PTFE is combined so as to show as stabilization and the improvement of the friction and wear behavior of the PTFE composite of adaptive mode
A kind of new way of material high performance.
The composite of the present invention has excellent tribological property, can be adaptive according to actual condition in friction
The formation of its frictional interface transfer membrane is adjusted, the optimum condition needed for friction is reached, it is stable, adapt in underloading and middle load
Condition, can make slip antifriction parts, sliding bearing, seal etc., can apply to machinery, petrochemical industry, aviation boat
The field such as it.
Embodiment
The PTFE based self lubricated composite materials regulated and controled below by specific embodiment to interface adaptation of the present invention
Technical scheme elaborates.
Embodiment 1
Each raw material of the polytetrafluoroethylene (PTFE) based self lubricated composite material of the present embodiment interface adaptation regulation and control presses quality percentage
Several proportionings are：FeNi alloys 1wt%, polytetrafluoroethylene (PTFE) 95wt%, MoS24wt%；Wherein, FeNi alloys and MoS2Particle
Spend for 400 mesh.
The present embodiment interface adaptation regulation and control polytetrafluoroethylene (PTFE) based self lubricated composite material is to be prepared as follows：
S1, weighing：Each raw material is weighed by proportioning；
S2, batch mixing：Each raw material weighed in S1 is well mixed, compound is obtained；
S3, cold pressing：The compound obtained in S2 is put into compacting tool set, compacting tool set is put into hydraulic press, at room temperature,
Pressurize 10min after 55MPa is boosted to 5MPa/min speed, to obtain being cold-pressed part after 15MPa/min speed release；
S4, sintering：The cold pressing part obtained in S3 is put into sintering furnace, in N2Protection under, with 10 DEG C/min speed liter
Temperature is to 220 DEG C, after insulation 25min, is warming up to 13 DEG C/min speed after 300 DEG C, insulation 35min, with 5 DEG C/min speed
It is warming up to after 380 DEG C, insulation 220min, room temperature is cooled to 15 DEG C/min speed, gained sintered part is interface adaptation
Regulate and control PTFE based self lubricated composite materials.
Embodiment 2
Each raw material of the polytetrafluoroethylene (PTFE) based self lubricated composite material of the present embodiment interface adaptation regulation and control presses quality percentage
Several proportionings are：FeNi alloys 40wt%, polytetrafluoroethylene (PTFE) 50wt%, graphite 5wt%；Wherein, of FeNi alloys and graphite
Granularity is 30 mesh.
The present embodiment interface adaptation regulation and control PTFE based self lubricated composite materials are to be prepared as follows：
S1, weighing：Each raw material is weighed by proportioning；
S2, batch mixing：Each raw material weighed in S1 is well mixed, compound is obtained；
S3, cold pressing：The compound obtained in S2 is put into compacting tool set, compacting tool set is put into hydraulic press, at room temperature,
Pressurize 6min after 65MPa is boosted to 15MPa/min speed, to obtain being cold-pressed part after 25MPa/min speed release；
S4, sintering：The cold pressing part obtained in S3 is put into sintering furnace, in N2Protection under, with 15 DEG C/min speed liter
Temperature is to 260 DEG C, after insulation 15min, is warming up to 8 DEG C/min speed after 340 DEG C, insulation 20min, with 10 DEG C/min speed
It is warming up to after 400 DEG C, insulation 180min, room temperature is cooled to 20 DEG C/min speed, gained sintered part is interface adaptation
The polytetrafluoroethylene (PTFE) based self lubricated composite material of regulation and control.
Embodiment 3
Each raw material of the polytetrafluoroethylene (PTFE) based self lubricated composite material of the present embodiment interface adaptation regulation and control presses quality percentage
Several proportionings are：FeNi alloys 15wt%, polytetrafluoroethylene (PTFE) 80wt%, graphite and MoS2According to 1:1 mixing accounts for 5wt% altogether；Its
In, FeNi alloys, graphite and MoS2Granularity be 150 mesh.
The present embodiment interface adaptation regulation and control PTFE based self lubricated composite materials are to be prepared as follows：
S1, weighing：Each raw material is weighed by proportioning；
S2, batch mixing：Each raw material weighed in S1 is well mixed, compound is obtained；
S3, cold pressing：The compound obtained in S2 is put into compacting tool set, compacting tool set is put into hydraulic press, at room temperature,
Pressurize 8min after 62MPa is boosted to 11MPa/min speed, to obtain being cold-pressed part after 19MPa/min speed release；
S4, sintering：The cold pressing part obtained in S3 is put into sintering furnace, in N2Protection under, with 13 DEG C/min speed liter
Temperature is to 247 DEG C, after insulation 20min, is warming up to 11 DEG C/min speed after 327 DEG C, insulation 31min, with 7 DEG C/min speed
It is warming up to after 388 DEG C, insulation 200min, room temperature is cooled to 19 DEG C/min speed, gained sintered part is interface adaptation
The polytetrafluoroethylene (PTFE) based self lubricated composite material of regulation and control.
Embodiment 4
Each raw material of the polytetrafluoroethylene (PTFE) based self lubricated composite material of the present embodiment interface adaptation regulation and control presses quality percentage
Several proportionings are：FeNi alloys 15wt%, polytetrafluoroethylene (PTFE) 70wt%, graphite and MoS2According to 1:2 mixing account for 15wt% altogether；Its
In, FeNi alloys, graphite and MoS2Granularity be 200 mesh.
The polytetrafluoroethylene (PTFE) based self lubricated composite material of the present embodiment interface adaptation regulation and control is to be made as follows
It is standby：
S1, weighing：Each raw material is weighed by proportioning；
S2, batch mixing：Each raw material weighed in S1 is well mixed, compound is obtained；
S3, cold pressing：The compound obtained in S2 is uniformly mated formation on bimetal plate, then by the sheet material containing batch mixing
Automatic rolling machine roll-forming is put into, obtains being cold-pressed part；
S4, sintering：The cold pressing part obtained in S3 is put into sintering furnace, in N2Protection under, with 11 DEG C/min speed liter
Temperature is to 246 DEG C, after insulation 18min, is warming up to 7 DEG C/min speed after 315 DEG C, insulation 32min, with 12 DEG C/min speed
It is warming up to after 398 DEG C, insulation 185min, is cooled to room temperature, gained sintered part is interface adaptation regulation and control PTFE base self-lubricatings
Composite.
It is the performance parameter of composite under different operating modes in table 1 below：
As can be seen from Table 1：The self-lubricating composite of the present invention has good interface adaptation control, and this can be with
The transfer membrane situation formed from its friction process is illustrated, because transfer membrane is the key factor for controlling friction process.It is right
The PTFE based self lubricated composite materials of interface adaptation regulation and control carry out tribological property survey under friction speed and/or different loads
Examination, material can produce different friction induction magnetic induction intensity in friction process, but its transfer film thickness formed is basic
It is stable at 1.5 μm or so, thus for different operating mode, (speed is：0.2m/s~0.8m/s, load is：0.5MPa~
4MPa), due to the magnetized effect that rubs, can adaptively it be adjusted, it is ensured that the homogeneity of transfer membrane is relatively stable.
Table 1
| Friction induction magnetic induction intensity | Shift film thickness |
| 0.008mT | 1.3μm |
| 0.010mT | 1.5μm |
| 0.015mT | 1.4μm |
| 0.018mT | 1.7μm |
| 0.035mT | 1.6μm |
Claims (2)
1. a kind of polytetrafluoroethylene (PTFE) based self lubricated composite material of interface adaptation regulation and control, it is characterised in that：The composite
Each raw material proportioning by weight percent be：
FeNi alloys 15wt%, polytetrafluoroethylene (PTFE) 70wt%, graphite and MoS2According to 1:2 mixing account for 15wt% altogether；Wherein, FeNi
Alloy, graphite and MoS2Granularity be 200 mesh.
2. a kind of preparation side of the polytetrafluoroethylene (PTFE) based self lubricated composite material of interface adaptation regulation and control as claimed in claim 1
Method, it is characterised in that comprise the following steps：
S1, weighing：Each raw material is weighed by proportioning；
S2, batch mixing：Each raw material is well mixed, compound is obtained；
S3, cold pressing：The compound is put into compacting tool set, compacting tool set is then put into hydraulic press, in 55-65MPa models
Interior pressurize 6-10min shapings are enclosed, obtain being cold-pressed part after release；
Or the compound is coated with bimetal plate, sheet material automatic rolling roll-forming is carried out, cold pressing part is obtained；
S4, sintering：The cold pressing part is put into sintering furnace, in N2Protection under, be warming up to 220-260 DEG C, be incubated 15-25min,
300-340 DEG C is warming up to again, 20-35min is incubated, and is finally warming up to after 380-400 DEG C, insulation 180-220min, is down to room temperature,
Produce the polytetrafluoroethylene (PTFE) based self lubricated composite material of interface adaptation regulation and control.
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