CN109468494A - A kind of wear-resistant netted Cr3C2Enhance the preparation method of NiAl alloy epitaxy - Google Patents
A kind of wear-resistant netted Cr3C2Enhance the preparation method of NiAl alloy epitaxy Download PDFInfo
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- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 56
- 239000000956 alloy Substances 0.000 title claims abstract description 56
- 238000000407 epitaxy Methods 0.000 title claims abstract description 39
- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- NPXOKRUENSOPAO-UHFFFAOYSA-N Raney nickel Chemical compound [Al].[Ni] NPXOKRUENSOPAO-UHFFFAOYSA-N 0.000 title abstract description 49
- 229910000943 NiAl Inorganic materials 0.000 title abstract description 47
- 239000000843 powder Substances 0.000 claims abstract description 55
- 238000005245 sintering Methods 0.000 claims abstract description 39
- 229910003470 tongbaite Inorganic materials 0.000 claims abstract description 33
- 239000000463 material Substances 0.000 claims abstract description 30
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 22
- 238000000498 ball milling Methods 0.000 claims abstract description 14
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 12
- 239000004615 ingredient Substances 0.000 claims description 10
- 229910052786 argon Inorganic materials 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 6
- 229910002804 graphite Inorganic materials 0.000 claims description 6
- 239000010439 graphite Substances 0.000 claims description 6
- 238000000227 grinding Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000002791 soaking Methods 0.000 claims description 6
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims 1
- 239000010931 gold Substances 0.000 claims 1
- 229910052737 gold Inorganic materials 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 239000000919 ceramic Substances 0.000 abstract description 20
- 229910000765 intermetallic Inorganic materials 0.000 abstract description 9
- 230000002708 enhancing effect Effects 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 description 8
- 238000005299 abrasion Methods 0.000 description 7
- 239000011159 matrix material Substances 0.000 description 6
- 239000013078 crystal Substances 0.000 description 5
- 238000011065 in-situ storage Methods 0.000 description 4
- 238000001228 spectrum Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 239000011812 mixed powder Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 3
- 238000002441 X-ray diffraction Methods 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000000593 degrading effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 229910052573 porcelain Inorganic materials 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000006104 solid solution Substances 0.000 description 2
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 230000003026 anti-oxygenic effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/007—Alloys based on nickel or cobalt with a light metal (alkali metal Li, Na, K, Rb, Cs; earth alkali metal Be, Mg, Ca, Sr, Ba, Al Ga, Ge, Ti) or B, Si, Zr, Hf, Sc, Y, lanthanides, actinides, as the next major constituent
-
- 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
- B22F3/105—Sintering only by using electric current other than for infrared radiant energy, laser radiation or plasma ; by ultrasonic bonding
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/05—Mixtures of metal powder with non-metallic powder
- C22C1/058—Mixtures of metal powder with non-metallic powder by reaction sintering (i.e. gasless reaction starting from a mixture of solid metal compounds)
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
- C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
- C22C19/058—Alloys based on nickel or cobalt based on nickel with chromium without Mo and W
-
- 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
The invention discloses a kind of wear-resistant netted Cr3C2The preparation method for enhancing NiAl alloy epitaxy is prepared using Ni powder, Al powder, Cr powder and Ni packet graphite powder by ball milling and SPS sintering technology.Alloy structure prepared by the present invention is simple, constructs out three-dimensional netted Cr in the NiAl intermetallic compound base body of equiaxed grain structure3C2Ceramic enhancement phase.Present invention process is easy to operate, at low cost, and the material of preparation has wearability excellent in high yield strength and room temperature~800 DEG C, has extensive prospects for commercial application.
Description
Technical field
The present invention relates to wide temperature range wear-resistant material technical field, specifically a kind of wear-resistant netted Cr3C2Enhance NiAl alloy epitaxy
Preparation method, with material made from method of the invention have high yield strength, in the temperature range of room temperature~800 DEG C
With excellent wearability, it can be used as long-term wear-resistant material within the scope of wide temperature range and be used widely.
Background technique
With the fast development of modern industry, people are to the military service stability of critical movements components and wanting for service life
Ask higher and higher.Abrasion is one of the main reason for leading to part failure.For high-temperature material, Service Environment is more and more severe
It carves, service temperature is higher and higher, is remarkably decreased so as to cause the intensity of material, and components failure is caused to accelerate.Therefore, wide temperature range
The design preparation and high-tech application of wear-resistant material, the performance of high-temperature field critical component is improved and service reliability play to
Close important role.
Surface solid lubricating is the conventional means for improving component capabilities, which needs constantly to mend there are life problems
It fills.Research and development block wear-resistant material is the effective way for meeting industrial development needs.In traditional block materials, solid solution alloy is bent
It is low to take intensity, serious wear, especially high temperature soften, and abrasion increased dramatically；Although ceramics (room temperature within the scope of wide temperature range
~800 DEG C) there is excellent wearability, but its intrinsic brittleness is big, limits its part industrial application.Intermetallic compound has
The crystal structure of long-range order, the atom that metallic bond and covalent bond is presented combine, and architectural characteristic makes intermetallic compound can
The plasticity of metal and the elevated temperature strength of ceramics can be had concurrently.Especially NiAl alloy epitaxy, it is intensity with higher, low density, good
Antioxygenic property and mechanical behavior under high temperature, high-temperature wearable field have important application potential.
Although NiAl alloy epitaxy is more wear-resisting than solid solution alloy, wearability at high temperature is still higher, in 800 DEG C of abrasion
Rate is up to 11.34 × 10-5mm3/ Nm, it is necessary to which (Zhu SY, Bi QL, Niu MY, et are improved to the wearability of its wide temperature range
al.Tribological behavior of NiAl matrix composites with addition of oxides at
high temperatures,Wear(274)2012 423-34).Solid lubricating phase is added in NiAl alloy epitaxy to be significantly improved
The wearability of wide temperature range, but compounds solid lubricant and NiAl alloy epitaxy compatibility are poor, are degrading its mechanical property.Addition
Granular ceramic enhancement phase can be improved the yield strength and wearability of alloy, but the region of particulate ceramic phase is easy hair
Raw stress is concentrated, its toughness is degrading.In short, the modified NiAl alloy epitaxy of conventional method is difficult to meet mechanical property and wide temperature range
Anti abrasive common prescription.
Summary of the invention
The present invention provides a kind of wear-resistant netted Cr3C2The preparation method for enhancing NiAl alloy epitaxy, solves and transports in the prior art
The technical issues of being difficult to meet mechanical property and wide temperature range anti abrasive common prescription with the modified NiAl alloy epitaxy of conventional method.
The invention is realized in this way steps are as follows:
1) ball milling
Ni packet graphite powder, Ni powder, Al powder and Cr powder are weighed respectively, and said components are fully enclosed in WC ball grinder and carry out ball
Mill, obtains uniformly mixed starting powder product；
2) SPS is sintered
Step 1) resulting product is packed into graphite jig, is subsequently placed in SPS discharge plasma sintering furnace, it is low in vacuum degree
In 5 × 10-3It is sintered under Pa, after sintering, material cools to room temperature with the furnace and obtains wear-resistant netted Cr3C2Enhance NiAl
Alloy.
By the element raw material of Ceramics phase in the feed, and preferentially forming the larger formation temperature for forming phase mutually and afterwards
Degree is poor, preferentially forms opposite other elements has repulsive interaction, is formed on the basis of the specific sintering temperature control of phase afterwards, acquisition
The ceramic post sintering phase of netted enhancing.
As further preferred embodiment, the Ni packet graphite powder, the Ni powder, the Al powder and the Cr powder
It is (NiAl) that content, which corresponds to atomic percent ingredient,(1-x)(Cr3C2)x。
As further preferred embodiment, 0.05≤x≤0.30.
As further preferred embodiment, the Ni packet graphite powder is 200 mesh, and the Ni powder is 400 mesh, the Al
Powder is 200 mesh, and the Cr powder is 400 mesh.
As further preferred embodiment, the heating rate of the SPS sintering is 10~20 DEG C/min, sintering temperature
It is 1100~1300 DEG C, soaking time is 4~10min, and sintering pressure is 30~50MPa.
As further preferred embodiment, the condition of the ball milling: for WC ball as abrading-ball, ratio of grinding media to material is 2~3:1,
8~10h is mixed under protection of argon gas with the speed of 200~400r/min.
Beneficial effects of the present invention: NiAl intermetallic compound forms equiax crystal, the three-dimensional netted Cr being formed in situ3C2Pottery
Porcelain reinforced phase is constructed on equiax crystal matrix, and the structure of in-situ preparation reticulated ceramic enhancing intermetallic compound is formd.It is netted
Cr3C2Enhancing NiAl alloy epitaxy has high intensity, and yield strength is not less than 1530MPa.Netted Cr3C2Enhance NiAl alloy epitaxy in width
There is excellent wear-resisting property, in the wide temperature range of room temperature~800 DEG C, wear rate is not higher than 1.15 × 10 in temperature range-5mm3/Nm。
Sintering temperature is suitable for avoiding other Cr-C ceramic phases from tending to be formed, avoiding Cr3C2Reticulated ceramic mutually tends to grow up.
Detailed description of the invention
Fig. 1 is NiAl-Cr in embodiment 13C2The XRD diffracting spectrum of (15at.%) alloy；
Fig. 2 is NiAl-Cr in embodiment 13C2Ni, Al, Cr, C ingredient Surface scan picture of (15at.%) alloy；
Fig. 3 is NiAl-Cr in embodiment 23C2The scanning electron microscope macrograph of (15at.%) alloy；
Fig. 4 is NiAl-Cr in embodiment 33C2The XRD diffracting spectrum of (10at.%) alloy；
Fig. 5 is NiAl-Cr in embodiment 33C2Ni, Al, Cr, C ingredient Surface scan picture of (10at.%) alloy；
Fig. 6 is the wear rate comparison chart of embodiment 1,3 gained NiAl alloy epitaxies in room temperature~800 DEG C；
Fig. 7 is the NiAl-Cr that embodiment 1,2 provides3C2The NiAl-Cr that (15at.%) alloy, embodiment 3 provide3C2
The room temperature compressive stress strain curve of (10at.%) alloy and NiAl alloy epitaxy.
Specific embodiment
Technical solution of the present invention is clearly and completely retouched below in conjunction with specific embodiments of the present invention and attached drawing
It states, it is clear that described embodiment is only a part of the embodiment of the present invention, instead of all the embodiments.Based in the present invention
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts,
It shall fall within the protection scope of the present invention.
A kind of wear-resistant netted Cr3C2Enhance the preparation method of NiAl alloy epitaxy, steps are as follows:
1) ball milling
Ni packet graphite powder, Ni powder, Al powder and Cr powder are weighed respectively, and said components are fully enclosed in WC ball grinder and carry out ball
Mill, obtains uniformly mixed starting powder product；
2) SPS is sintered
Step 1) resulting product is packed into graphite jig, is subsequently placed in SPS discharge plasma sintering furnace, it is low in vacuum degree
In 5 × 10-3It is sintered under Pa, after sintering, material cools to room temperature with the furnace and obtains wear-resistant netted Cr3C2Enhance NiAl
Alloy.
By the element raw material of Ceramics phase in the feed, and preferentially forming the larger formation temperature for forming phase mutually and afterwards
Degree is poor, preferentially forms opposite other elements has repulsive interaction, is formed on the basis of the specific sintering temperature control of phase afterwards, acquisition
The ceramic post sintering phase of netted enhancing.
Further, the content of the Ni packet graphite powder, the Ni powder, the Al powder and the Cr powder corresponds to atomic percent
It is (NiAl) than ingredient(1-x)(Cr3C2)x。
Further, 0.05≤x≤0.30.
Further, the Ni packet graphite powder is 200 mesh, and the Ni powder is 400 mesh, and the Al powder is 200 mesh, the Cr
Powder is 400 mesh.
Further, the heating rate of the SPS sintering is 10~20 DEG C/min, and sintering temperature is 1100~1300 DEG C,
Soaking time is 4~10min, and sintering pressure is 30~50MPa.
Further, the condition of the ball milling: WC ball is as abrading-ball, and ratio of grinding media to material is 2~3:1, with 200~400r/min's
Speed mixes 8~10h under protection of argon gas.
Embodiment 1
Wear-resistant netted Cr3C2Enhance the preparation method of NiAl alloy epitaxy:
Ball milling: selection Ni packet graphite powder, Ni powder, Al powder and Cr powder, by above-mentioned four kinds of components according to atomic percent ingredient
(NiAl)0.85(Cr3C2)0.15Weigh powder, wherein the Ni packet graphite powder is 200 mesh, and the Ni powder is 400 mesh, the Al
Powder is 200 mesh, and the Cr powder is 400 mesh.Weighed powder is put into be loaded into WC (tungsten carbide) ball grinder and carries out ball milling,
Then WC ball mixes 8h with the speed of 300r/min under protection of argon gas, is uniformly mixed as abrading-ball, ratio of grinding media to material 2:1
Starting powder product.
SPS sintering: being packed into graphite jig for mixed-powder, be subsequently placed in SPS discharge plasma sintering furnace and be sintered,
Sintering parameter are as follows: vacuum degree is lower than 5 × 10-3Pa, heating rate are 10 DEG C/min, and sintering temperature is 1200 DEG C, and sintering pressure is
40MPa, soaking time 5min, after sintering, material cools to room temperature with the furnace and obtains wear-resistant netted Cr3C2Enhance NiAl
Alloy, i.e. NiAl-Cr3C2(15at.%).Refering to attached drawing 2, ingredient Surface scan is carried out to the material that the present embodiment obtains.
Refering to attached drawing 1, NiAl-Cr resulting to the present embodiment3C2(15at.%) carries out X-ray diffraction, obtains diffraction pattern
Spectrum, it is seen that the structure of material is NiAl intermetallic compound phase and Cr3C2Ceramic phase, NiAl alloy epitaxy are equiaxed grain structure, Cr3C2
Ceramic phase is in net distribution on NiAl alloy epitaxy matrix, material yield strength 1740Mpa.
Embodiment 2
Wear-resistant netted Cr3C2Enhance the preparation method of NiAl alloy epitaxy:
Ball milling: selection Ni packet graphite powder, Ni powder, Al powder and Cr powder, by above-mentioned four kinds of components according to atomic percent ingredient
(NiAl)0.85(Cr3C2)0.15Weigh powder.Wherein, the Ni packet graphite powder is 200 mesh, and the Ni powder is 400 mesh, the Al
Powder is 200 mesh, and the Cr powder is 400 mesh.Weighed powder is put into be loaded into WC (tungsten carbide) ball grinder and carries out ball milling,
Then WC ball mixes 10h with the speed of 200r/min under protection of argon gas, is uniformly mixed as abrading-ball, ratio of grinding media to material 3:1
Starting powder product.
SPS sintering: being packed into graphite jig for mixed-powder, be subsequently placed in SPS discharge plasma sintering furnace and be sintered,
Sintering parameter are as follows: vacuum degree is lower than 5 × 10-3Pa, heating rate are 15 DEG C/min, and sintering temperature is 1100 DEG C, and sintering pressure is
30MPa, soaking time 10min, after sintering, material cools to room temperature with the furnace and obtains wear-resistant netted Cr3C2Enhance NiAl
Alloy, i.e. NiAl-Cr3C2(15at.%).
Materials microstructure: NiAl alloy epitaxy is equiaxed grain structure, Cr3C2Ceramic phase is in net distribution on NiAl alloy epitaxy matrix.
Refering to attached drawing 3, electron microscope tissue scanning is carried out to the material that the present embodiment obtains.The present embodiment material yield strength and reality
Example 1 is close.
Embodiment 3
Wear-resistant netted Cr3C2Enhance the preparation method of NiAl alloy epitaxy:
Ball milling: selection Ni packet graphite powder, Ni powder, Al powder and Cr powder, by above-mentioned four kinds of components according to atomic percent ingredient
(NiAl)0.90(Cr3C2)0.10Weigh powder.Wherein, the Ni packet graphite powder is 200 mesh, and the Ni powder is 400 mesh, the Al
Powder is 200 mesh, and the Cr powder is 400 mesh.Weighed powder is put into be loaded into WC (tungsten carbide) ball grinder and carries out ball milling,
Then WC ball mixes 8h as abrading-ball, ratio of grinding media to material 2.5:1 with the speed of 400r/min under protection of argon gas, it is equal to obtain mixing
Even starting powder product.
SPS sintering: being packed into graphite jig for mixed-powder, be subsequently placed in SPS discharge plasma sintering furnace and be sintered,
Sintering parameter are as follows: vacuum degree is lower than 5 × 10-3Pa, heating rate are 20 DEG C/min, and sintering temperature is 1300 DEG C, and sintering pressure is
50MPa, soaking time 4min, after sintering, material cools to room temperature with the furnace and obtains wear-resistant netted Cr3C2Enhance NiAl
Alloy, i.e. NiAl-Cr3C2(10at.%).Refering to attached drawing 5, ingredient Surface scan is carried out to the material that the present embodiment obtains.
Refering to attached drawing 4, NiAl-Cr resulting to the present embodiment3C2(10at.%) carries out X-ray diffraction, obtains diffraction pattern
Spectrum, it is seen that the structure that material is made in the present embodiment is NiAl intermetallic compound phase, Cr3C2Ceramic phase and a small amount of Cr23C6Ceramics
Phase, NiAl alloy epitaxy are equiaxed grain structure, and in net distribution on NiAl alloy epitaxy matrix, material yield strength is ceramic phase
1530Mpa。
Test example
Abrasion test
It will be used as test group made from embodiment 1, embodiment 2, embodiment 3, as a control group by NiAl alloy epitaxy, carries out resistance to
Mill property comparative test.
The abrasion resistance properties of alloy sell disk-type friction abrasion tester using HT-1000, and abrasive material is diameter 6mm
Si3N4Ceramic Balls, test temperature are 25 DEG C, 600 DEG C, 800 DEG C, and gliding cable structure is 0.19m/s, and load is 10N, test period
60min.Wear rate is calculated according to formula W=V/ (SF), and wherein W is wear rate；V is wear volume, is surveyed using surface profiler
Amount；S is sliding distance；F is load.
Test result is referring to table 1 and attached drawing 6.
Wear rate (unit × 10 of the NiAl alloy epitaxy in room temperature~800 DEG C obtained by 1 embodiment 1-3 of table-5mm3/Nm)
It can be seen that by table 1 and attached drawing 6, for the NiAl alloy epitaxy of control group at 800 DEG C, wear rate is 11.34 × 10-5mm3/
Nm, hence it is evident that wear rate when higher than 25 DEG C of room temperature, and the resulting NiAl-Cr of embodiment 1-2 as test group3C2
The resulting NiAl-Cr of (15at.%), embodiment 33C2(10at.%), in the temperature range of room temperature~800 DEG C, not only wear rate
Very little is lower than 1.13 × 10-5mm3/ Nm, and wear rate amplitude of variation is smaller, the wherein resulting NiAl-Cr of embodiment 13C2Mill
Loss rate is minimum.As it can be seen that NiAl alloy epitaxy made from embodiment 1-3 has good abrasion resistance properties, i.e., in wide warm territory
With excellent wearability.
The experiment of room temperature compression stress
Embodiment 1, embodiment 2, embodiment 3 are subjected to room temperature compression stress-strain experiment, room temperature compression stress-strain
Curve is referring to attached drawing 7.
As seen from Figure 7, the yield strength of the NiAl alloy epitaxy of control group is 685MPa, and resulting as example 1
NiAl-Cr3C2The yield strength of (15at.%) is 1740MPa, the resulting NiAl-Cr of example 23C2The surrender of (15at.%) is strong
It spends close to embodiment 1, the resulting NiAl-Cr of embodiment 33C2The yield strength of (10at.%) is 1530MPa.It can be seen that embodiment
NiAl alloy epitaxy made from 1-3 has high yield strength.
Beneficial effects of the present invention: NiAl intermetallic compound forms equiax crystal, the three-dimensional netted Cr being formed in situ3C2Pottery
Porcelain reinforced phase is constructed on equiax crystal matrix, and the structure of in-situ preparation reticulated ceramic enhancing intermetallic compound is formd.It is netted
Cr3C2Enhancing NiAl alloy epitaxy has high intensity, and yield strength is not less than 1530MPa.Netted Cr3C2Enhance NiAl alloy epitaxy in width
There is excellent wear-resisting property, in the wide temperature range of room temperature~800 DEG C, wear rate is not higher than 1.15 × 10 in temperature range-5mm3/Nm。
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (6)
1. a kind of wear-resistant netted Cr3C2Enhance the preparation method of NiAl alloy epitaxy, which is characterized in that steps are as follows:
1) ball milling
Ni packet graphite powder, Ni powder, Al powder and Cr powder are weighed respectively, and said components are fully enclosed in WC ball grinder and carry out ball milling,
Obtain uniformly mixed starting powder product；
2) SPS is sintered
Step 1) resulting product is packed into graphite jig, is subsequently placed in SPS discharge plasma sintering furnace, is lower than 5 in vacuum degree
×10-3It is sintered under Pa, after sintering, material cools to room temperature with the furnace and obtains wear-resistant netted Cr3C2Enhance NiAl to close
Gold.
2. the wear-resistant netted Cr of one kind according to claim 13C2Enhance the preparation method of NiAl alloy epitaxy, which is characterized in that
It is (NiAl) that the content of the Ni packet graphite powder, the Ni powder, the Al powder and the Cr powder, which corresponds to atomic percent ingredient,(1-x)
(Cr3C2)x。
3. the wear-resistant netted Cr of one kind according to claim 23C2Enhance the preparation method of NiAl alloy epitaxy, which is characterized in that
0.05≤x≤0.30。
4. the wear-resistant netted Cr of one kind according to claim 2 or 33C2Enhance the preparation method of NiAl alloy epitaxy, feature exists
In the Ni packet graphite powder is 200 mesh, and the Ni powder is 400 mesh, and the Al powder is 200 mesh, and the Cr powder is 400 mesh.
5. the wear-resistant netted Cr of one kind according to claim 43C2Enhance the preparation method of NiAl alloy epitaxy, which is characterized in that
The heating rate of SPS sintering is 10~20 DEG C/min, and sintering temperature is 1100~1300 DEG C, soaking time is 4~
10min, sintering pressure are 30~50MPa.
6. the wear-resistant netted Cr of one kind according to claim 53C2Enhance the preparation method of NiAl alloy epitaxy, which is characterized in that
The condition of the ball milling: WC ball is as abrading-ball, and ratio of grinding media to material is 2~3:1, under protection of argon gas with the speed of 200~400r/min
Mix 8~10h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910007768.4A CN109468494B (en) | 2019-01-04 | 2019-01-04 | Wear-resistant net-shaped Cr3C2Preparation method of reinforced NiAl alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910007768.4A CN109468494B (en) | 2019-01-04 | 2019-01-04 | Wear-resistant net-shaped Cr3C2Preparation method of reinforced NiAl alloy |
Publications (2)
| Publication Number | Publication Date |
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Cited By (2)
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| CN114835496A (en) * | 2022-04-21 | 2022-08-02 | 合肥工业大学 | Cr (chromium) 3 C 2 Method for preparing block material |
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| CN114835496A (en) * | 2022-04-21 | 2022-08-02 | 合肥工业大学 | Cr (chromium) 3 C 2 Method for preparing block material |
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