CN108436077A - A kind of addition nano-TiO2The preparation method of alloy powder - Google Patents
A kind of addition nano-TiO2The preparation method of alloy powder Download PDFInfo
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Abstract
The present invention relates to a kind of addition nano-TiOs2The preparation method of alloy powder, the method which uses mist projection granulating, by nano-TiO2It is coated on the surface of principal component raw material powder of the matrix alloy powder, is allowed to form TiO2The coated particle of/principal component raw material powder, so that nano-TiO2Dispersed precipitate is prepared in alloy powder containing nano-TiO2Alloy powder；The processing step of preparation is：Glue → glue and nano-TiO2Mixing → ultrasonic activation → addition reduced iron powder → mist projection granulating → mixed powder.This method operates fairly simple, technological process relative ease, and it is green non-pollution to prepare binder raw material used.The nano-TiO added by this method2Uniform Dispersed precipitate effectively prevents nano-TiO in matrix alloy powder2The generation of agglomeration.
Description
Technical field
The present invention relates to a kind of addition nano-TiOs2Alloy powder preparation method, by adding nanometer into Fe based alloys
TiO2Particle prepares a kind of novel alloy powder.It can be applied to the exploitation of workpiece surface modification and medicine core, solid core welding wire
In, to improve welding seam tissue capability and improve the performances such as hardstanding hardness, wear-resisting.
Background technology
Nano material has become the hot spot of many disciplinary studies, and the nanometer that many industrially developed country will be developed into
Welding rod is applied to various fields.It is well known that most of oxides are unfavorable for the performance of metal, but size is tiny
Nano-oxide can be as the core of forming core in process of setting, and growing up for crystal grain can be hindered on crystal boundary, in turn
So that tissue is refined, improves metallicity.Nano-oxide is added into weld metal by welding material, can directly be obtained
Second-phase strength phase is obtained, and passes through the additive amount for controlling nano-oxide so that size, distribution and the quantity of oxide occur
Variation, and then control the organization type of weld metal.In addition addition nano-oxide can also improve the rust-proofing ability of welding material,
And the stability that can improve electric arc in welding process further increases appearance of weld performance.
TiO2Fusing point be 1850 DEG C, the TiO of molten state2It is preferable to the wetability of steel, there is preferable caking property.But
The nano-TiO of powdered form2Particle is tiny, light weight, and surface energy is big, and activity is higher, extremely unstable, has strong adsorption energy
Power is extremely easy to happen reunion in turn, i.e., in addition TiO2Added nano-TiO can be caused in the process2The excellent properties pole of particle
Big reduction even completely loses.When nano-titanium dioxide being added directly in hybrid alloys powder, alloyed powder is difficult to mix
It is even, and splashed in the welding process than more serious.So how to add nano-TiO into alloy powder2It can be uniform
Be dispersed in alloy powder, become one prepare addition nano-TiO2Alloy powder key point.Relevant scholar carries out
The research of the micro-nano oxide alloy powder process of addition.
Application No. is：The Chinese patent of CN103521760A discloses a kind of Ni-based micro-nano oxide enhancing alloy powder
Preparation method, processing step is：Matrix alloy powder prepare → add Micro-nano oxide particle → addition bonding agent →
Stirring ball-milling → combination powder → drying → broken → screening.Wherein use the phenolic resin, epoxy resin or water of heat curing type
Glass is added ring ethyl ketone or methanol solvate, makes it dissolve into resin solution as bonding agent.The processing step is relatively complicated, real
Border operating process is relatively time-consuming, and the bonding agent type added is more also not economic and environment-friendly enough.
Invention content
In view of the deficiencies of the prior art, purpose of the present invention is to design a kind of relatively simple addition nano TiO 2 alloy of technique
The preparation method of powder.This method operates fairly simple, technological process relative ease, and prepares binder raw material used and be
Green non-pollution.The nano-TiO added by this method2Uniform Dispersed precipitate is effectively prevented in matrix alloy powder
Nano-TiO2The generation of agglomeration.
Technical solution is used by the present invention solves the technical problem：A kind of addition nano-TiO is provided2Alloy powder
Preparation method, the step of preparation method is：
(1) glue
According to mass ratio it is 90~100 by deionized water and sodium carboxymethylcellulose powder:1 ratio is mixed in beaker
It closes, beaker is put into electric-heated thermostatic water bath and is stirred, keeps the temperature and stirs 1.5~2 hours, complete glue；Wherein electric heating
The heating temperature of thermostat water bath is set as 80 DEG C~100 DEG C；
(2) glue and nano-TiO2Mixing
Nano-TiO is added into beaker after step (1) completion2And dispersant sodium polyphosphate, and continue constant temperature and stir
It mixes, obtains containing nano-TiO2Colloid；Wherein nano-TiO2Additive amount is the 2%~8% of matrix alloy powder quality, dispersant
Addition be no more than TiO2It is added the 0.8% of quality amount；
(3) ultrasonic activation
After waiting for that step (2) is completed, beaker is put into from taking-up in electric-heated thermostatic water bath in ultrasonic oscillation device and is vibrated
To nano-TiO2It is dispersed in the colloid of step (1), obtains containing nano-TiO2Colloid；
(4) the principal component raw material powder of matrix alloy is added
The principal component raw material powder and deionized water for adding matrix alloy into beaker again, wherein the principal component raw material added
Powder, deionized water with contain nano-TiO2Colloid between mass ratio be 2~3:1:1；It is sufficiently stirred to obtain principal component again
Raw material powder contains nano-TiO2Colloid, deionized water mixed slurry；
(5) spraying and powder making
Step (4) obtained mashing pump is extracted into Highspeedcentrifugingandsprayingdrier and carries out mist projection granulating, formed it is main at
Divide raw material powder/TiO2Coated particle；
(6) powder is mixed
By matrix alloy powder and the principal component raw material powder/TiO prepared2Coated particle be put into mixed powder machine, with
The speed of 20~30r/min carries out mixed powder, is that gained contains nano-TiO after mixing2Alloy powder.
Compared with the prior art the present invention has the advantage that：
The present invention adds nano-TiO2Compared with the prior art, technological process is easy for the preparation method of alloy powder, operation
Relatively simple and used binder, dispersant are edible material.Preparation principle is to utilize nontoxic binder
By nano-TiO2It adheres on Fe powder particles, effectively by nano-TiO2Dispersion is added in alloy system.It is not generated during it
Any chemical reaction, only physics coat.Prepared alloy powder is included in preparation and not will produce dirt in using
Dye, can effectively reduce the produced pollution in welding process.To prepared Fe/TiO2Coated particle is in EVO MA15 types
Number scanning electron microscope (SEM) under observed, and using energy disperse spectroscopy (EDS) to sample microcell carry out constituent analysis, and
And to Fe/TiO2Coated particle has carried out x-ray diffraction experiment (XRD), by attached drawing 1 it can be seen that Fe/TiO2Coated particle is presented
60 μm or so of subsphaeroidal and spheric granules, the mobility of particle of such shape are fabulous.The mobility in molten bath in the welding process
The quality of weldquality is directly affected, spheric granules plays the mobility in molten bath in welding process positive effect.From attached
The TiO that white is dispersed in Fe powder particles surface dispersions is clear that in Fig. 22Particle (X ray diffracting spectrum and energy
Spectrum can confirm), by power spectrum (EDS) and X ray diffracting spectrum (XRD) it can be seen that the technique system designed by the present invention
For the Fe/TiO gone out2There is TiO in coated particle2.In conjunction with the above detection means illustrate invention technique can effectively by
TiO2Dispersion is added in Fe based alloys.
It should be pointed out that technical solution provided by the invention is not limited to add nano-TiO into ferrous alloy2, for
The relevant preparation process of nano-oxide is added into alloy powder to be applicable in.
Description of the drawings
Fig. 1 is Fe/TiO in the alloy powder prepared by embodiment 22Coated particle scans macro morphology.
Fig. 2 is Fe/TiO in the alloy powder prepared by embodiment 22Coated particle scans microscopic appearance.
Fig. 3 is Fe/TiO2Coated particle energy spectrum diagram.
Fig. 4 is Fe/TiO in prepared alloy powder2The X ray diffracting spectrum of coated particle.
Fig. 5 is Fe/TiO in the alloy powder prepared by comparative example 12Coated particle scans microscopic appearance.
Specific implementation mode
Foregoing invention is further described with reference to specific embodiment.
The present invention adds nano-TiO2The preparation method of alloy powder, the method which uses mist projection granulating will
Nano-TiO2It is coated on the surface of principal component raw material powder of the matrix alloy powder, is allowed to form TiO2/ principal component raw material powder
The coated particle at end, so that nano-TiO2Dispersed precipitate is prepared in alloy powder containing nano-TiO2Alloyed powder
End；The processing step of preparation is：Glue → glue and nano-TiO2Mixing → ultrasonic activation → addition reduced iron powder → spraying is made
Grain → mixed powder,
It is as follows：
(1) glue
Raw material：CMC (sodium carboxymethylcellulose) powder is that the cellulose that a kind of glucose polymerization degree is 100~2000 spreads out
Biology, it is odorless, it is tasteless, there is hygroscopicity；Deionized water.
It prepares：According to mass ratio it is 90~100 by deionized water and CMC powder:1 ratio mixes in beaker, will burn
Cup is put into electric-heated thermostatic water bath and is stirred with clean blender；The heating temperature of wherein electric-heated thermostatic water bath is set
It is set to 80 DEG C~100 DEG C, keep the temperature and stirs 1.5~2 hours；
(2) glue and nano-TiO2Mixing
Nano-TiO is added into beaker after step (1) completion2And dispersant sodium polyphosphate, and continue constant temperature and stir
It mixes, the heating temperature of electric-heated thermostatic water bath is still set as 80 DEG C~100 DEG C, keeps the temperature and stirs 15~30 minutes, obtains containing and receive
Rice TiO2Colloid；Wherein nano-TiO2Additive amount is the 2%~8% of matrix alloy powder quality, and the addition of dispersant does not surpass
Cross TiO2It is added the 0.8% of quality amount；
(3) ultrasonic activation
After waiting for that step (2) is completed, beaker is put into from taking-up in electric-heated thermostatic water bath in ultrasonic oscillation device and vibrates 5
~10 minutes, vibration was taken out after finishing and is stirred 5~10 minutes with blender again；
(4) the principal component raw material powder of matrix alloy is added
After the completion of waiting for step (3) stirring, the principal component raw material powder and deionized water of matrix alloy are added into beaker,
The principal component raw material powder of middle addition, deionized water and contain nano-TiO2Colloid between mass ratio be 2~3:1:1；Again
It is sufficiently stirred 1.5~2 hours with blender, finally obtains principal component raw material powder, contains nano-TiO2Colloid, deionized water
Mixed slurry；
(5) spraying and powder making
Step (4) obtained mashing pump is extracted into LPG type Highspeedcentrifugingandsprayingdriers and carries out mist projection granulating, is formed
Principal component raw material powder/TiO2Coated particle, it should be noted that need first to be passed through deionized water before being passed through slurry, with this
Equipment is cleaned；It waits for continuing to be passed through suitable deionized water after the complete pumping of slurry is complete, it will be remaining in equipment with this
Slurry sprays completely, and wherein the temperature setting of LPG types Highspeedcentrifugingandsprayingdrier air inlet is 250 DEG C~280 DEG C, air outlet
Temperature setting be 100 DEG C~120 DEG C.
(6) powder is mixed
By matrix alloy powder and the principal component raw material powder/TiO prepared2Coated particle be put into VH-2 types and mix powder machine
In, mixed powder is carried out with the speed of 20~30r/min, the time is 30~40min, is that gained contains nano-TiO after mixing2
Alloy powder.
Matrix alloy described in preparation method of the present invention is Fe based alloys, and the principal component raw material powder of matrix alloy is reduction
Nano-oxide is effectively added to as reinforcing agent in alloy by iron powder, the application method, can form Dispersed precipitate, by reduced iron
Powder mixes to be uniformly distributed disperse of the nano-oxide in matrix alloy in advance plays advantageous effect.Matrix closes in the present invention
Gold can also be nickel-base alloy etc..
Embodiment 1
The present embodiment is by nano-TiO2It is added in ferrous alloy, matrix alloy is ferrous alloy, iron(-)base powder packet
High carbon ferro-chrome, mid-carbon fe-mn, molybdenum-iron, chromium powder, silica flour, tungsten powder, vanadium powder, titanium valve, niobium powder, reduced iron powder (ingredient is shown in Table 1) are included, is closed
The granularity at bronze end all≤200 mesh.Preparation method is by nano-TiO2It is added in iron(-)base powder, in particular to using spray
The method that mist is granulated is by nano-TiO2It is coated on Fe powder particles surface, then is mixed nano-TiO in turn with other alloy powders2
It is added in matrix alloy powder, preparation process is：Glue → glue and nano-TiO2Mixing → ultrasonic activation → addition reduction
Iron powder → mist projection granulating → mixed powder.The additive amount of nano-titanium dioxide is 2% (mass percent) of iron(-)base powder quality.
Purity >=0.999 of iron(-)base powder.
Table 1
It is as follows：
(1) glue
Raw material：CMC powder 100g, deionized water 10kg.
It prepares：CMC (sodium carboxymethylcellulose) powder is mixed with deionized water in a clean beaker, by beaker
It is put into electric-heated thermostatic water bath and is stirred with blender (cleaning up).The wherein heating temperature of electric-heated thermostatic water bath
90 DEG C of setting, keeps the temperature and stirs 1.5 hours, completes glue.
(2) glue and nano-TiO2Mixing
40g nano-TiOs are added into beaker after step (1) completion2And 0.16g dispersants sodium polyphosphate and continue
Constant temperature stirs.The heating temperature of electric-heated thermostatic water bath is still set as 90 DEG C, keeps the temperature and stirs 1.5 hours.
(3) ultrasonic activation
After waiting for that step (2) is completed, beaker is put into from taking-up in electric-heated thermostatic water bath in ultrasonic oscillation device and vibrates 5
Minute, vibration is taken out after finishing and is stirred 5 minutes with blender again, and nano-TiO is made2It is dispersed in the colloid of step (1),
It obtains containing nano-TiO2Colloid.
(4) reduced iron powder is added
After the completion of waiting for step (3) stirring, 20kg reduced iron powders and 10kg deionized waters are added into beaker.Blender is used again
It is sufficiently stirred 1.5 hours, finally obtains reduced iron powder, contains nano-TiO2Colloid, deionized water mixed slurry.
(5) spraying and powder making
Step (4) obtained mashing pump is extracted into LPG type Highspeedcentrifugingandsprayingdriers and carries out mist projection granulating, is formed
Fe/TiO2Coated particle；It should be noted that needing first to be passed through deionized water before being passed through slurry, equipment is carried out with this clear
It washes.It waits for continuing to be passed through suitable deionized water after the complete pumping of slurry is complete, is sprayed remaining slurry in equipment completely with this.
The temperature for being provided with LPG type Highspeedcentrifugingandsprayingdrier air inlets is 270 DEG C, and the temperature of air outlet is set as 110 DEG C.
(5) powder is mixed
By iron(-)base powder and the Fe/TiO prepared2Coated particle is put into VH-2 types and mixes in powder machine, with 25r/min's
Speed carries out mixed powder, and time 30min is uniformly mixed and obtains containing nano-TiO2Iron(-)base powder.
Embodiment 2
The raw materials used same embodiment 1 of the present embodiment, the difference is that the group that the alloy material raw material prepared is added is divided into：
The additive amount of nano-titanium dioxide is 4% (mass percent) of iron(-)base powder quality.
It is as follows：
(1) glue
Raw material：CMC powder 100g, deionized water 10kg.
It prepares：CMC is mixed with deionized water in a clean beaker, beaker is put into electric-heated thermostatic water bath
It is used in combination blender (cleaning up) to be stirred.The heating temperature of wherein electric-heated thermostatic water bath is set as 90 DEG C, keeps the temperature and stirs
It mixes 1.5 hours.
(2) glue and nano-TiO2Mixing
80g nano-TiOs are added into beaker after step (1) completion2And 0.32g dispersants and continue constant temperature stirring.
The heating temperature of electric-heated thermostatic water bath is still set as 90 DEG C, keeps the temperature and stirs 1.5 hours.
(3) ultrasonic activation
After waiting for that step (2) is completed, beaker is put into from taking-up in electric-heated thermostatic water bath in ultrasonic oscillation device and vibrates 5
Minute, vibration is taken out after finishing and is stirred 5 minutes with blender again.
(4) reduced iron powder is added
After the completion of waiting for step (3) stirring, 20kg reduced iron powders and 10kg deionized waters are added into beaker.Blender is used again
It is sufficiently stirred 1.5 hours, finally obtains reduced iron powder, contains nano-TiO2Colloid, deionized water mixed slurry.
(5) spraying and powder making
Step (4) obtained mashing pump is extracted into LPG type Highspeedcentrifugingandsprayingdriers and carries out mist projection granulating.
(5) powder is mixed
By iron(-)base powder and the Fe/TiO prepared2Coated particle is put into VH-2 types and mixes in powder machine, with 25r/min's
Speed carries out mixed powder, and time 30min is uniformly mixed.
To prepared Fe/TiO2Coated particle is seen under the scanning electron microscope (SEM) of EVO MA15 models
It examines, and constituent analysis is carried out to sample microcell using energy disperse spectroscopy (EDS).Wherein scanning pattern is shown in that Fig. 1, Fig. 2, energy spectrum diagram are shown in Fig. 3.
Fig. 1 is Fe/TiO in the alloy powder prepared by the present embodiment2Scanning macroscopic view shape of the coated particle under × 150 times
Looks electron microscope, as can be seen from the figure prepared powder particle is uniform in size and in spherical or close spherical.
Fig. 2 is Fe/TiO in the alloy powder prepared by the present embodiment2Scanning of the coated particle under × 5000 times is microcosmic
Pattern electron microscope, as can be seen from the figure evenly dispersed tiny TiO in prepared powder particle2Particle (white portion
Point), wherein carrying out energy-spectrum scanning to the white edge part in Fig. 2.The whiteness of powder particle surface is known to energy spectrum diagram
TiO2, this further proves that the technique of the present invention can be effectively by TiO2It is added in matrix alloy.
And to Fe/TiO2Coated particle has carried out x-ray diffraction experiment (XRD), and X ray diffracting spectrum is shown in Fig. 4.By scheming
1 it can be seen that Fe/TiO260 μm or so of subsphaeroidal and spheric granules, the mobility of particle pole of such shape is presented in coated particle
It is good.The mobility in molten bath directly affects the quality of weldquality in the welding process, and spheric granules is to molten bath in welding process
Mobility plays positive effect.It is clear that from Fig. 2 and is dispersed with white in Fe powder particles surface dispersions
TiO2Particle (X ray diffracting spectrum and power spectrum can confirm), can by power spectrum (EDS) and X ray diffracting spectrum (XRD)
To find out the Fe/TiO prepared by the technique of the invention designed2There is TiO in coated particle2.In conjunction with the above detection means
Illustrate that the technique of the present embodiment can be effectively by TiO2Dispersion is added in Fe based alloys, can obtain the TiO of Dispersed precipitate2
With the hybrid alloys powder of Fe based alloys.
Embodiment 3
The component and specific steps of alloy material raw material prepared by the present embodiment are with embodiment 1, the difference is that receiving
Rice TiO2Additive amount be 6%.
Embodiment 4
The component and specific steps of alloy material raw material prepared by the present embodiment are with embodiment 1, the difference is that receiving
Rice TiO2Additive amount be 8%.
Embodiment 5
The component and specific steps of alloy material raw material prepared by the present embodiment are with embodiment 3, the difference is that step
Suddenly the mass ratio of deionized water and CMC powder is 90 in (1):1.
Embodiment 6
The component and specific steps of alloy material raw material prepared by the present embodiment are with embodiment 5, the difference is that step
Reduced iron powder, deionized water in rapid 4 with contain nano-TiO2Colloid between mass ratio be 3:1:1.
Comparative example 1
Comparative example 1 is compared with embodiment 2.
The content of raw materials used and addition nano-titanium dioxide is the same as embodiment 2 in this comparative example.
Glue → glue and nano-TiO2Mixing → ultrasonic activation → addition reduced iron powder → mist projection granulating → mixed powder.Specifically
Steps are as follows：
(1) glue
Raw material：CMC powder 100g, deionized water 10kg.
It prepares：CMC is mixed with deionized water in a clean beaker, beaker is put into electric-heated thermostatic water bath
It is used in combination blender (cleaning up) to be stirred.The heating temperature of wherein electric-heated thermostatic water bath is set as 90 DEG C, keeps the temperature and stirs
It mixes 1.5 hours.
(2) glue is mixed with iron powder
After the completion of waiting for step (1) stirring, 20kg reduced iron powders and 10kg deionized waters are added into beaker.Blender is used again
It is sufficiently stirred 1.5 hours.
(3) glue and nano-TiO2Mixing
80g nano-TiOs are added into beaker after step (2) completion2And 0.32g dispersants and continue constant temperature stirring.
The heating temperature of electric-heated thermostatic water bath is still set as 90 DEG C, keeps the temperature and stirs 1.5 hours.
(4) ultrasonic activation
After waiting for that step (3) is completed, beaker is put into from taking-up in electric-heated thermostatic water bath in ultrasonic oscillation device and vibrates 5
Minute, vibration is taken out after finishing and is stirred 5 minutes with blender again.Finally obtain reduced iron powder, nano-TiO2, colloid, go from
The mixed slurry of sub- water.
(5) spraying and powder making
Step (4) obtained mashing pump is extracted into LPG type Highspeedcentrifugingandsprayingdriers and carries out mist projection granulating, wherein
The temperature that LPG type Highspeedcentrifugingandsprayingdrier air inlets are arranged is 270 DEG C, and the temperature of air outlet is set as 110 DEG C.
(5) powder is mixed
By iron(-)base powder and the Fe/TiO prepared2Coated composite powder is put into VH-2 types and mixes in powder machine, with the speed of 25r/min
Degree carries out mixed powder, and time 30min is uniformly mixed.
Comparative example 2
The step of comparative example 2, is with comparative example 1, the difference is that nano-TiO in this comparative example2Additive amount be iron-based close
The 6% of golden powder quality.
It is to be noted that this technique is finding nano-TiO by the detection of experimentation2Additive amount be 2~8%
Most preferably.Base material is not limited to ferrous alloy, is suitable for utilizing addition nano-TiO2Other alloy systems as " reinforcing agent ".
Find that comparative example is to add to receive after first being mixed Fe powder with glue by the comparison of comparative example and embodiment
Rice TiO2, it is to be overturned the process step of the invention, finds effectively play so that receiving under the technique after testing
Rice TiO2The effect of Dispersed precipitate.Occurs larger white in the powder particle obtained under the technique as seen from Figure 5
Grain (in white circle), the as nano-TiO of state of aggregation2Particle, this shows that the technique cannot be satisfied the prerequisite of Dispersed precipitate.
The present invention does not address place and is suitable for the prior art.
Claims (4)
1. a kind of addition nano-TiO2The step of preparation method of alloy powder, the preparation method is：
（1）Glue
According to mass ratio it is 90 ~ 100 by deionized water and sodium carboxymethylcellulose powder:1 ratio mixes in beaker, will burn
Cup, which is put into electric-heated thermostatic water bath, to be stirred, and is kept the temperature and is stirred 1.5 ~ 2 hours, and glue is completed；Wherein electric heating constant temperature water-bath
The heating temperature of pot is set as 80 DEG C ~ 100 DEG C；
（2）Glue and nano-TiO2Mixing
Wait for step（1）Nano-TiO is added after completion into beaker2And dispersant sodium polyphosphate, and continue constant temperature stirring, it obtains
To containing nano-TiO2Colloid；Wherein nano-TiO2Additive amount is the 2% ~ 8% of matrix alloy powder quality, the addition of dispersant
No more than TiO2It is added the 0.8% of quality amount；
（3）Ultrasonic activation
Wait for step（2）After completion, beaker is put into be vibrated in ultrasonic oscillation device from taking-up in electric-heated thermostatic water bath and is received
Rice TiO2It is dispersed in step（1）Colloid in, obtain contain nano-TiO2Colloid；
（4）The principal component raw material powder of matrix alloy is added
The principal component raw material powder and deionized water for adding matrix alloy into beaker again, wherein the principal component raw material powder added
End, deionized water with contain nano-TiO2Colloid between mass ratio be 2 ~ 3:1:1；It is sufficiently stirred to obtain principal component raw material again
Powder contains nano-TiO2Colloid, deionized water mixed slurry；
（5）Spraying and powder making
By step（4）Obtained mashing pump, which is extracted into Highspeedcentrifugingandsprayingdrier, carries out mist projection granulating, and it is former to form principal component
Feed powder end/TiO2Coated particle；
（6）Mixed powder
By matrix alloy powder and the principal component raw material powder/TiO prepared2Coated particle be put into mixed powder machine, with 20 ~
The speed of 30r/min carries out mixed powder, is that gained contains nano-TiO after mixing2Alloy powder.
2. addition nano-TiO according to claim 12The preparation method of alloy powder, it is characterised in that described in this method
Matrix alloy is Fe based alloys, and the principal component raw material powder of matrix alloy is reduced iron powder.
3. addition nano-TiO according to claim 12The preparation method of alloy powder, it is characterised in that described in this method
Highspeedcentrifugingandsprayingdrier is LPG type Highspeedcentrifugingandsprayingdriers, and the temperature setting of air inlet is 250 DEG C ~ 280 DEG C,
The temperature setting of air outlet is 100 DEG C ~ 120 DEG C.
4. addition nano-TiO according to claim 12The preparation method of alloy powder, it is characterised in that described matrix alloy
Raw material powder particle size no more than 200 mesh.
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| CN111321476A (en) * | 2020-05-11 | 2020-06-23 | 华东理工大学 | Method for reducing spray drying dust of chinlon chemical fiber titanium dioxide |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1443601A (en) * | 2002-03-07 | 2003-09-24 | 江苏苏净集团有限公司 | Nano titanium dioxide porous microsphere and its production method |
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| CN108436077B (en) | 2019-10-01 |
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