CN107916349A - A kind of TiAl based high-temp-resistants self-lubricating composite and preparation method - Google Patents
A kind of TiAl based high-temp-resistants self-lubricating composite and preparation method Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C14/00—Alloys based on titanium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/0047—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents
- C22C32/0052—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents only carbides
Abstract
A kind of TiAl based high-temp-resistants self-lubricating composite, its chemical composition mass percent are：Ti3SiC25 30%, remaining is TiAl alloy powder；The preparation method of above-mentioned TiAl based high-temp-resistants self-lubricating composite is mainly the Ti to mentioned component3SiC2Uniform with TiAl alloy powder progress ball milling mixing, drum's speed of rotation is 300 450r/min, and Ball-milling Time is 2 4h；After mixed-powder is dried, it is fitted into mould and carries out pre-molding, SPS sintering is carried out to the precompressed powder after drying, pressure is 20 50MPa, vacuum is 10 40Pa, is heated to 800 1200 DEG C, keeps the temperature 10 30min, heating rate is 50 100 DEG C/min, and furnace cooling, obtains blank；Blank is surface-treated, obtains TiAl based high-temp-resistant self-lubricating composites.Endurance of the present invention, impact resistance, high temperature resistant, bearing capacity are strong, and can realize self-lubricating property, reduce friction coefficient and wear extent, and self-lubricating property is more excellent under high-temperature situation.
Description
Technical field
The invention belongs to field of material technology, more particularly to a kind of lubricating composite.
Background technology
The great friction coefficient and wear extent of TiAl alloy cause the extensive concern of expert, in order to improve TiAl alloy friction
Polishing machine, Shi Xiaoliang et al. is by adding the Ti of different weight percentage3SiC2And MoS2Lubrication mutually prepares TiAl base self-lubricatings
Composite material (TMC).Research shows, adds 10wt% (Ti3SiC2-MoS2) TMC of phase is lubricated since friction surface produces uniqueness
Hierarchy there is good tribological property [Zhai W, Shi X, Wang M, et al.Friction and Wear
Properties of TiAl-Ti3SiC2-MoS2Composites Prepared by Spark Plasma Sintering
[J].Tribology Transactions,2014,57(3):416-424.]；Zhang Qiaoxin et al. provides a kind of TiAl- graphite
Alkene-Ti3SiC2Self-lubricating composite, obtained composite material purity is high, crystal grain is tiny, consistency is high, and has excellent power
[Zhang Qiaoxin, Xu Zengshi, Shi Xiaoliang, wait a kind of TiAl- graphenes-Ti of for performance and tribological property3SiC2Self-lubricating composite wood
Material and preparation method thereof [P] Hubei：CN103882257A,2014-06-25.]；A kind of bright et al. the Ti of invention of Shi Xiao3SiC2-
TiC- graphene self-lubricating composites, the Ti of preparation3SiC2- TiC- graphene self-lubricating composites purity is high, material interface
Bond strength is good, and compatibility is good, and [Shi Xiaoliang, Zhai Wenzheng, Xu Zengshi, wait with excellent mechanical property and tribological property
A kind of Ti3SiC2- TiC- graphenes self-lubricating composite and its synthesizing preparation method in situ [P] Hubei：CN103693963A,
2014-04-02.]；Bright et al. the invention one kind of Shi Xiao contains Ti3SiC2、Ti2AlC and C ternary composite lubricatings phase and enhancing phase TiC
TiAl intermetallic compound base solid self-lubricating composite material.The self-lubricating composite consistency of synthesis is high, tribology
Energy is good, technological parameter is stablized, and preparation process is quick and easy, and easy to operate [Shi Xiaoliang, Peng Meichao, Zhang Qiaoxin, wait a kind of TiAl gold of
Compound base solid self-lubricating composite material and preparation method thereof [P] Hubei between category：CN102492871A,2012-06-13.].
These above-mentioned sintering composite materials all improve the wearability of composite material to a certain extent, but comprehensive performance needs to be carried
It is high.
As industrial technology is fast-developing, since TiAl materials have high intensity, high rigidity, lightweight, good croop property
The advantages that, therefore be widely used in Aerospace Engineering project.When dry friction, which occurs, for TiAl materials slides, produce larger
Friction coefficient and wear extent, significantly limit the application of the material.
The content of the invention
It is an object of the invention to provide a kind of bearing capacity is strong, high intensity, high rigidity, high temperature resistant, under high-temperature situation
The excellent TiAl based high-temp-resistants self-lubricating composite of self-lubricating property and preparation method.
The chemical composition mass percent of TiAl based high-temp-resistant self-lubricating composites of the present invention is：Ti3SiC2 5-
30%, remaining is TiAl alloy powder；
The chemical composition mass percent of the TiAl alloy is：Al powder 20-40%, Cr powder 1-5%, remaining be Ti powder；
The Ti3SiC2The granularity of powder is 40~200 mesh, and the granularity of TiAl alloy powder is 100~300 mesh；
The preparation method of above-mentioned TiAl based high-temp-resistants self-lubricating composite：
(1) preparation of mixed-powder
To the Ti of mentioned component3SiC2Uniform with TiAl alloy powder progress ball milling mixing, mixing process is in argon atmosphere
Carry out, for alcohol as dispersant, additive amount is to add 3-5ml, ratio of grinding media to material 2 per 100g mixed-powders:1, drum's speed of rotation is
300-450r/min, Ball-milling Time are 2-4h (rotating alternate run, every 30 minutes alternatings are once)；
(2) precompressed is dried
After mixed-powder is dried, it is fitted into mould and carries out pre-molding, pressure 10-25MPa, dwell time 10s,
Then precompressed powder is dried；
(3) discharge plasma sintering (SPS)
SPS sintering is carried out to the powder of step (2) precompressed, pressure 20-50MPa, vacuum 10-40Pa, is heated to
800-1200 DEG C, 10-30min is kept the temperature, heating rate is 50-100 DEG C/min, and furnace cooling, obtains blank；
(4) blank prepared by step (3) is subjected to surface grinding, deburring processing, obtains TiAl based high-temp-resistants from profit
Sliding composite material.
The present invention has the following advantages compared with prior art：
1st, Ti is added as matrix using TiAl alloy3SiC2Lubrication mechanism is mutually enriched as lubrication, improves TiAl alloy
The defects of higher dry friction coefficient of material and wear rate；
2nd, Cr elements are added in TiAl powder, the mechanical property of TiAl alloy can be improved, improves TiAl alloy brittleness and lacks
Fall into.
3rd, prepared material not only has the advantages that high intensity, high rigidity, lightweight, good croop property, and can be real
Now certainly
Greasy property, reduces friction coefficient and wear extent, and self-lubricating property is more excellent under high-temperature situation, is disliked suitable for making
Bad work
Self-lubricating bearing under condition.
Embodiment
Embodiment 1
The 30%Ti that granularity is 40 mesh is added according to mass percent3SiC2, remaining is the TiAl that 300 mesh of granularity has sintered
Alloy powder, the mass percents of the TiAl alloy powdered ingredients be 20%Al powder, 1%Cr powder, remaining be Ti powder, using row
Planetary ball mill carries out uniform ball to above-mentioned powder and mixes, and mixing process carries out in argon atmosphere, and alcohol is as dispersant, addition
Measure and add 3ml, ratio of grinding media to material 2 for every 100g mixed-powders:1, drum's speed of rotation is set as 300r/min, and Ball-milling Time is (positive and negative for 1h
Turn alternate run, 30 minutes alternatings are once)；After above-mentioned uniformly mixed powder drying, it is fitted into cylindrical die and carries out in advance
Molded, pressure 25MPa, dwell time 10s, then dries preloading block；SPS sintering, pressure are carried out to the preloading block of drying
Power is 20MPa, vacuum 10Pa, is heated to 800 DEG C, keeps the temperature 10min, heating rate is 50 DEG C/min, and furnace cooling, obtains hair
Base；Blank is subjected to surface grinding, deburring processing, obtains TiAl based high-temp-resistant self-lubricating composites.
Embodiment 2
The 5%Ti that granularity is 80 mesh is added according to mass percent3SiC2, remaining is closed for the TiAl that 300 mesh of granularity has sintered
Bronze end, the mass percents of the TiAl alloy powdered ingredients be 20%Al powder, 3%Cr powder, remaining be Ti powder, using planet
Formula ball mill carries out uniform ball to above-mentioned powder and mixes, and mixing process carries out in argon atmosphere, and alcohol is as dispersant, additive amount
5ml, ratio of grinding media to material 2 are added for every 100g mixed-powders:1, drum's speed of rotation is set as 300r/min, and Ball-milling Time is (positive and negative for 2h
Turn alternate run, 30 minutes alternatings are once)；After above-mentioned uniformly mixed powder drying, it is fitted into cylindrical die and carries out in advance
Molded, pressure 25MPa, dwell time 10s, then dries preloading block；SPS sintering, pressure are carried out to the preloading block of drying
Power is 20MPa, vacuum 10Pa, is heated to 1000 DEG C, keeps the temperature 10min, heating rate is 80 DEG C/min, and furnace cooling, obtains
Blank；Blank is subjected to surface grinding, deburring processing, obtains TiAl based high-temp-resistant self-lubricating composites.
Embodiment 3
The 20%Ti that granularity is 80 mesh is added according to mass percent3SiC2, remaining is the TiAl that 100 mesh of granularity has sintered
Alloy powder, the mass percents of the TiAl alloy powdered ingredients be 20%Al powder, 1%Cr powder, remaining be Ti powder, using row
Planetary ball mill carries out uniform ball to above-mentioned powder and mixes, and mixing process carries out in argon atmosphere, and alcohol is as dispersant, addition
Measure and add 5ml, ratio of grinding media to material 2 for every g mixed-powders:1, drum's speed of rotation is set as 400r/min, and Ball-milling Time is 3h (rotatings
Alternate run, 30 minutes alternatings are once)；After above-mentioned uniformly mixed powder drying, it is fitted into cylindrical die and carries out precompressed
Shaping, pressure 10MPa, dwell time 10s, then dries preloading block；SPS sintering, pressure are carried out to the preloading block of drying
For 20MPa, vacuum 10Pa, 1200 DEG C are heated to, keeps the temperature 20min, heating rate is 50 DEG C/min, and furnace cooling, obtains hair
Base；Blank is subjected to surface grinding, deburring processing, obtains TiAl based high-temp-resistant self-lubricating composites.
Embodiment 4
The 30%Ti that granularity is 100 mesh is added according to mass percent3SiC2, remaining is the TiAl that 300 mesh of granularity has sintered
Alloy powder, the mass percents of the TiAl alloy powdered ingredients be 30%Al powder, 5%Cr powder, remaining be Ti powder, using row
Planetary ball mill carries out uniform ball to above-mentioned powder and mixes, and mixing process carries out in argon atmosphere, and alcohol is as dispersant, addition
Measure and add 3ml, ratio of grinding media to material 2 for every 100g mixed-powders:1, drum's speed of rotation is set as 300r/min, Ball-milling Time for 4h (just
Alternate run is inverted, 30 minutes alternatings are once)；After above-mentioned uniformly mixed powder drying, it is fitted into cylindrical die and carries out
Pre-molding, pressure 25MPa, dwell time 10s, then dries preloading block；SPS sintering is carried out to the preloading block of drying,
Pressure is 30MPa, vacuum 10Pa, is heated to 900 DEG C, keeps the temperature 10min, heating rate is 50 DEG C/min, and furnace cooling, obtains
Blank；Blank is subjected to surface grinding, deburring processing, obtains TiAl based high-temp-resistant self-lubricating composites.
Embodiment 5
The 30%Ti that granularity is 60 mesh is added according to mass percent3SiC2, remaining is the TiAl that 100 mesh of granularity has sintered
Alloy powder, the mass percents of the TiAl alloy powdered ingredients be 20%Al powder, 1%Cr powder, remaining be Ti powder, using row
Planetary ball mill carries out uniform ball to above-mentioned powder and mixes, and mixing process carries out in argon atmosphere, and alcohol is as dispersant, addition
Measure and add 3ml, ratio of grinding media to material 2 for every 100g mixed-powders:1, drum's speed of rotation is set as 300r/min, Ball-milling Time for 2h (just
Alternate run is inverted, 30 minutes alternatings are once)；After above-mentioned uniformly mixed powder drying, it is fitted into cylindrical die and carries out
Pre-molding, pressure 20MPa, dwell time 10s, then dries preloading block；SPS sintering is carried out to the preloading block of drying,
Pressure is 20MPa, vacuum 10Pa, is heated to 950 DEG C, keeps the temperature 10min, heating rate is 50 DEG C/min, and furnace cooling, obtains
Blank；Blank is subjected to surface grinding, deburring processing, obtains TiAl based high-temp-resistant self-lubricating composites.
Embodiment 6
The 30%Ti that granularity is 120 mesh is added according to mass percent3SiC2, remaining is the TiAl that 100 mesh of granularity has sintered
Alloy powder, the mass percents of the TiAl alloy powdered ingredients be 20%Al powder, 3%Cr powder, remaining be Ti powder, using row
Planetary ball mill carries out uniform ball to above-mentioned powder and mixes, and mixing process carries out in argon atmosphere, and alcohol is as dispersant, addition
Measure and add 5ml, ratio of grinding media to material 2 for every 100g mixed-powders:1, drum's speed of rotation is set as 450r/min, Ball-milling Time for 2h (just
Alternate run is inverted, 30 minutes alternatings are once)；After above-mentioned uniformly mixed powder drying, it is fitted into cylindrical die and carries out
Pre-molding, pressure 20MPa, dwell time 10s, then dries preloading block；SPS sintering is carried out to the preloading block of drying,
Pressure is 50MPa, vacuum 30Pa, is heated to 1200 DEG C, keeps the temperature 20min, heating rate is 50 DEG C/min, and furnace cooling, obtains
To blank；Blank is subjected to surface grinding, deburring processing, obtains TiAl based high-temp-resistant self-lubricating composites.
Embodiment 7
The 5%Ti that granularity is 170 mesh is added according to mass percent3SiC2, remaining is the TiAl that 100 mesh of granularity has sintered
Alloy powder, the mass percents of the TiAl alloy powdered ingredients be 20%Al powder, 1%Cr powder, remaining be Ti powder, using row
Planetary ball mill carries out uniform ball to above-mentioned powder and mixes, and mixing process carries out in argon atmosphere, and alcohol is as dispersant, addition
Measure and add 3ml, ratio of grinding media to material 2 for every 100g mixed-powders:1, drum's speed of rotation is set as 300r/min, Ball-milling Time for 3h (just
Alternate run is inverted, 30 minutes alternatings are once)；After above-mentioned uniformly mixed powder drying, it is fitted into cylindrical die and carries out
Pre-molding, pressure 25MPa, dwell time 10s, then dries preloading block；SPS sintering is carried out to the preloading block of drying,
Pressure is 20MPa, vacuum 10Pa, is heated to 1150 DEG C, keeps the temperature 10min, heating rate is 80 DEG C/min, and furnace cooling, obtains
To blank；Blank is subjected to surface grinding, deburring processing, obtains TiAl based high-temp-resistant self-lubricating composites.
Embodiment 8
The 30%Ti that granularity is 100 mesh is added according to mass percent3SiC2, remaining is the TiAl that 100 mesh of granularity has sintered
Alloy powder, the mass percents of the TiAl alloy powdered ingredients be 30%Al powder, 5%Cr powder, remaining be Ti powder, using row
Planetary ball mill carries out uniform ball to above-mentioned powder and mixes, and mixing process carries out in argon atmosphere, and alcohol is as dispersant, addition
Measure and add 3ml, ratio of grinding media to material 2 for every 100g mixed-powders:1, drum's speed of rotation is set as 300r/min, Ball-milling Time for 1h (just
Alternate run is inverted, 30 minutes alternatings are once)；After above-mentioned uniformly mixed powder drying, it is fitted into cylindrical die and carries out
Pre-molding, pressure 25MPa, dwell time 10s, then dries preloading block；SPS sintering is carried out to the preloading block of drying,
Pressure is 20MPa, vacuum 20Pa, is heated to 850 DEG C, keeps the temperature 10min, heating rate is 100 DEG C/min, and furnace cooling, obtains
To blank；Blank is subjected to surface grinding, deburring processing, obtains TiAl based high-temp-resistant self-lubricating composites.
Embodiment 9
The 5%Ti that granularity is 100 mesh is added according to mass percent3SiC2, remaining is the TiAl that 100 mesh of granularity has sintered
Alloy powder, the mass percents of the TiAl alloy powdered ingredients be 20%Al powder, 1%Cr powder, remaining be Ti powder, using row
Planetary ball mill carries out uniform ball to above-mentioned powder and mixes, and mixing process carries out in argon atmosphere, and alcohol is as dispersant, addition
Measure and add 5ml, ratio of grinding media to material 2 for every 100g mixed-powders:1, drum's speed of rotation is set as 300r/min, Ball-milling Time for 2h (just
Alternate run is inverted, 30 minutes alternatings are once)；After above-mentioned uniformly mixed powder drying, it is fitted into cylindrical die and carries out
Pre-molding, pressure 25MPa, dwell time 10s, then dries preloading block；SPS sintering is carried out to the preloading block of drying,
Pressure is 30MPa, vacuum 30Pa, is heated to 800 DEG C, keeps the temperature 30min, heating rate is 100 DEG C/min, and furnace cooling, obtains
To blank；Blank is subjected to surface grinding, deburring processing, obtains TiAl based high-temp-resistant self-lubricating composites.
Embodiment 10
The 30%Ti that granularity is 120 mesh is added according to mass percent3SiC2, remaining is the TiAl that 100 mesh of granularity has sintered
Alloy powder, the mass percents of the TiAl alloy powdered ingredients be 20%Al powder, 1%Cr powder, remaining be Ti powder, using row
Planetary ball mill carries out uniform ball to above-mentioned powder and mixes, and mixing process carries out in argon atmosphere, and alcohol is as dispersant, addition
Measure and add 3ml, ratio of grinding media to material 2 for every 100g mixed-powders:1, drum's speed of rotation is set as 300r/min, Ball-milling Time for 4h (just
Alternate run is inverted, 30 minutes alternatings are once)；After above-mentioned uniformly mixed powder drying, it is fitted into cylindrical die and carries out
Pre-molding, pressure 25MPa, dwell time 10s, then dries preloading block；SPS sintering is carried out to the preloading block of drying,
Pressure is 20MPa, vacuum 10Pa, is heated to 1050 DEG C, keeps the temperature 30min, heating rate is 80 DEG C/min, and furnace cooling, obtains
To blank；Blank is subjected to surface grinding, deburring processing, obtains TiAl based high-temp-resistant self-lubricating composites.
Embodiment 11
The 30%Ti that granularity is 200 mesh is added according to mass percent3SiC2, remaining is the TiAl that 100 mesh of granularity has sintered
Alloy powder, the mass percents of the TiAl alloy powdered ingredients be 20%Al powder, 1%Cr powder, remaining be Ti powder, using row
Planetary ball mill carries out uniform ball to above-mentioned powder and mixes, and mixing process carries out in argon atmosphere, and alcohol is as dispersant, addition
Measure and add 5ml, ratio of grinding media to material 2 for every 100g mixed-powders:1, drum's speed of rotation is set as 300r/min, Ball-milling Time for 2h (just
Alternate run is inverted, 30 minutes alternatings are once)；After above-mentioned uniformly mixed powder drying, it is fitted into cylindrical die and carries out
Pre-molding, pressure 25MPa, dwell time 10s, then dries preloading block；SPS sintering is carried out to the preloading block of drying,
Pressure is 20MPa, vacuum 20Pa, is heated to 1150 DEG C, keeps the temperature 30min, heating rate is 100 DEG C/min, and furnace cooling, obtains
To blank；Blank is subjected to surface grinding, deburring processing, obtains TiAl based high-temp-resistant self-lubricating composites.
Embodiment 12
The 20%Ti that granularity is 120 mesh is added according to mass percent3SiC2, remaining is the TiAl that 300 mesh of granularity has sintered
Alloy powder, the mass percents of the TiAl alloy powdered ingredients be 40%Al powder, 5%Cr powder, remaining be Ti powder, using row
Planetary ball mill carries out uniform ball to above-mentioned powder and mixes, and mixing process carries out in argon atmosphere, and alcohol is as dispersant, addition
Measure and add 3ml, ratio of grinding media to material 2 for every 100g mixed-powders:1, drum's speed of rotation is set as 450r/min, Ball-milling Time for 3h (just
Alternate run is inverted, 30 minutes alternatings are once)；After above-mentioned uniformly mixed powder drying, it is fitted into cylindrical die and carries out
Pre-molding, pressure 25MPa, dwell time 10s, then dries preloading block；SPS sintering is carried out to the preloading block of drying,
Pressure is 20MPa, vacuum 10Pa, is heated to 1000 DEG C, keeps the temperature 30min, heating rate is 100 DEG C/min, and furnace cooling, obtains
To blank；Blank is subjected to surface grinding, deburring processing, obtains TiAl based high-temp-resistant self-lubricating composites.
Embodiment 13
The 20%Ti that granularity is 200 mesh is added according to mass percent3SiC2, remaining is the TiAl that 300 mesh of granularity has sintered
Alloy powder, the mass percents of the TiAl alloy powdered ingredients be 40%Al powder, 5%Cr powder, remaining be Ti powder, using row
Planetary ball mill carries out uniform ball to above-mentioned powder and mixes, and mixing process carries out in argon atmosphere, and alcohol is as dispersant, addition
Measure and add 3ml, ratio of grinding media to material 2 for every 100g mixed-powders:1, drum's speed of rotation is set as 450r/min, Ball-milling Time for 4h (just
Alternate run is inverted, 30 minutes alternatings are once)；After above-mentioned uniformly mixed powder drying, it is fitted into cylindrical die and carries out
Pre-molding, pressure 50MPa, dwell time 10s, then dries preloading block；SPS sintering is carried out to the preloading block of drying,
Pressure is 20MPa, vacuum 40Pa, is heated to 1200 DEG C, keeps the temperature 30min, heating rate is 100 DEG C/min, and furnace cooling, obtains
To blank；Blank is subjected to surface grinding, deburring processing, obtains TiAl based high-temp-resistant self-lubricating composites.
Embodiment 14
The 5%Ti that granularity is 170 mesh is added according to mass percent3SiC2, remaining is the TiAl that 200 mesh of granularity has sintered
Alloy powder, the mass percents of the TiAl alloy powdered ingredients be 30%Al powder, 5%Cr powder, remaining be Ti powder, using row
Planetary ball mill carries out uniform ball to above-mentioned powder and mixes, and mixing process carries out in argon atmosphere, and alcohol is as dispersant, addition
Measure and add 3ml, ratio of grinding media to material 2 for every 100g mixed-powders:1, drum's speed of rotation is set as 400r/min, Ball-milling Time for 2h (just
Alternate run is inverted, 30 minutes alternatings are once)；After above-mentioned uniformly mixed powder drying, it is fitted into cylindrical die and carries out
Pre-molding, pressure 20MPa, dwell time 10s, then dries preloading block；SPS sintering is carried out to the preloading block of drying,
Pressure is 50MPa, vacuum 30Pa, is heated to 880 DEG C, keeps the temperature 20min, heating rate is 80 DEG C/min, and furnace cooling, obtains
Blank；Blank is subjected to surface grinding, deburring processing, obtains TiAl based high-temp-resistant self-lubricating composites.
Embodiment 15
The 20%Ti that granularity is 200 mesh is added according to mass percent3SiC2, remaining is the TiAl that 200 mesh of granularity has sintered
Alloy powder, the mass percents of the TiAl alloy powdered ingredients be 30%Al powder, 3%Cr powder, remaining be Ti powder, using row
Planetary ball mill carries out uniform ball to above-mentioned powder and mixes, and mixing process carries out in argon atmosphere, and alcohol is as dispersant, addition
Measure and add 5ml, ratio of grinding media to material 2 for every 100g mixed-powders:1, drum's speed of rotation is set as 450r/min, Ball-milling Time for 4h (just
Alternate run is inverted, 30 minutes alternatings are once)；After above-mentioned uniformly mixed powder drying, it is fitted into cylindrical die and carries out
Pre-molding, pressure 25MPa, dwell time 10s, then dries preloading block；SPS sintering is carried out to the preloading block of drying,
Pressure is 50MPa, vacuum 40Pa, is heated to 1200 DEG C, keeps the temperature 10min, heating rate is 100 DEG C/min, and furnace cooling, obtains
To blank；Blank is subjected to surface grinding, deburring processing, obtains TiAl based high-temp-resistant self-lubricating composites.
Embodiment 16
The 20%Ti that granularity is 200 mesh is added according to mass percent3SiC2, remaining is the TiAl that 300 mesh of granularity has sintered
Alloy powder, the mass percents of the TiAl alloy powdered ingredients be 40%Al powder, 5%Cr powder, remaining be Ti powder, using row
Planetary ball mill carries out uniform ball to above-mentioned powder and mixes, and mixing process carries out in argon atmosphere, and alcohol is as dispersant, addition
Measure and add 3ml, ratio of grinding media to material 2 for every 100g mixed-powders:1, drum's speed of rotation is set as 450r/min, Ball-milling Time for 4h (just
Alternate run is inverted, 30 minutes alternatings are once)；After above-mentioned uniformly mixed powder drying, it is fitted into cylindrical die and carries out
Pre-molding, pressure 10MPa, dwell time 10s, then dries preloading block；SPS sintering is carried out to the preloading block of drying,
Pressure is 50MPa, vacuum 20Pa, is heated to 1100 DEG C, keeps the temperature 30min, heating rate is 100 DEG C/min, and furnace cooling, obtains
To blank；Blank is subjected to surface grinding, deburring processing, obtains TiAl based high-temp-resistant self-lubricating composites.
The performance of TiAl based high-temp-resistant self-lubricating composites is made in 1 above-described embodiment of table
Claims (4)
- A kind of 1. TiAl based high-temp-resistants self-lubricating composite, it is characterised in that：The mass percent of its chemical composition is： Ti3SiC25-30%, remaining is TiAl alloy powder.
- 2. the TiAl based high-temp-resistant self-lubricating composites according to right 1, it is characterised in that：The TiAl alloy powder The mass percent of chemical composition is：Al 20-40%, Cr 1-5%, remaining be Ti.
- 3. the TiAl based high-temp-resistant self-lubricating composites according to right 1, it is characterised in that the material Ti3SiC2Grain Spend for 40~200 mesh；The granularity of TiAl alloy is 100~300 mesh.
- 4. the preparation method of the TiAl based high-temp-resistant self-lubricating composites of claim 1, it is characterised in that：It includes following step Suddenly：(1) preparation of mixed-powderTo the Ti of mentioned component3SiC2With TiAl alloy powder carry out ball milling mixing it is uniform, mixing process in argon atmosphere into OK, for alcohol as dispersant, additive amount is to add 3-5ml, ratio of grinding media to material 2 per 100g mixed-powders:1, drum's speed of rotation is 300-450r/min, Ball-milling Time are 2-4h (rotating alternate run, every 30 minutes alternatings are once)；(2) precompressed is driedAfter mixed-powder is dried, it is fitted into mould and carries out pre-molding, pressure 10-25MPa, dwell time 10s, then Precompressed powder is dried；(3) discharge plasma sintering (SPS)SPS sintering is carried out to the powder of step (2) precompressed, pressure 20-50MPa, vacuum 10-40Pa, is heated to 800- 1200 DEG C, 10-30min is kept the temperature, heating rate is 50-100 DEG C/min, and furnace cooling, obtains blank；(4) blank prepared by step (3) is subjected to surface grinding, deburring processing, obtains TiAl based high-temp-resistant self-lubricatings and answer Condensation material.
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| CN108893645A (en) * | 2018-07-23 | 2018-11-27 | 燕山大学 | Containing polynary lubrication phase TiAl based self lubricated composite material and preparation method thereof |
| CN109136722A (en) * | 2018-10-26 | 2019-01-04 | 燕山大学 | TiAl-Ti3AlC2Self-lubricating composite and preparation method thereof |
| CN110093990A (en) * | 2019-05-10 | 2019-08-06 | 刘亚江 | A kind of vaccum environmental protection soundproof plate for finishing |
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