CN114012097A - Wear-resistant corrosion-resistant nickel-based powder for preparing gradient ceramics and metallurgical preparation method - Google Patents
Wear-resistant corrosion-resistant nickel-based powder for preparing gradient ceramics and metallurgical preparation method Download PDFInfo
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- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 title claims abstract description 154
- 239000000843 powder Substances 0.000 title claims abstract description 80
- 229910052759 nickel Inorganic materials 0.000 title claims abstract description 75
- 238000005260 corrosion Methods 0.000 title claims abstract description 39
- 230000007797 corrosion Effects 0.000 title claims abstract description 37
- 238000002360 preparation method Methods 0.000 title claims abstract description 24
- 239000000919 ceramic Substances 0.000 title claims abstract description 16
- 238000005245 sintering Methods 0.000 claims abstract description 44
- 238000002156 mixing Methods 0.000 claims abstract description 30
- 238000000034 method Methods 0.000 claims abstract description 26
- 239000002245 particle Substances 0.000 claims abstract description 19
- 238000010926 purge Methods 0.000 claims abstract description 16
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 11
- 239000007789 gas Substances 0.000 claims abstract description 11
- 239000013078 crystal Substances 0.000 claims abstract description 9
- 238000000227 grinding Methods 0.000 claims abstract description 9
- 230000001681 protective effect Effects 0.000 claims abstract description 9
- 230000003068 static effect Effects 0.000 claims abstract description 9
- 239000002131 composite material Substances 0.000 claims abstract description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 5
- 238000007599 discharging Methods 0.000 claims abstract description 5
- 238000011049 filling Methods 0.000 claims abstract description 5
- 238000009740 moulding (composite fabrication) Methods 0.000 claims abstract description 5
- 239000001301 oxygen Substances 0.000 claims abstract description 5
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 5
- 238000007873 sieving Methods 0.000 claims abstract description 3
- 238000001035 drying Methods 0.000 claims abstract 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- 239000011787 zinc oxide Substances 0.000 claims description 8
- 239000000080 wetting agent Substances 0.000 claims description 7
- 238000004663 powder metallurgy Methods 0.000 claims description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 claims description 4
- 239000005751 Copper oxide Substances 0.000 claims description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 4
- 229910052804 chromium Inorganic materials 0.000 claims description 4
- 239000011651 chromium Substances 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- 229910000431 copper oxide Inorganic materials 0.000 claims description 4
- 230000008030 elimination Effects 0.000 claims description 4
- 238000003379 elimination reaction Methods 0.000 claims description 4
- 239000012535 impurity Substances 0.000 claims description 4
- 239000011261 inert gas Substances 0.000 claims description 4
- 239000011812 mixed powder Substances 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 4
- 238000004062 sedimentation Methods 0.000 claims description 4
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 4
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 4
- 235000012239 silicon dioxide Nutrition 0.000 claims description 4
- 239000000377 silicon dioxide Substances 0.000 claims description 4
- 238000001179 sorption measurement Methods 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 239000010936 titanium Substances 0.000 claims description 4
- 229910052719 titanium Inorganic materials 0.000 claims description 4
- 239000012153 distilled water Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims 1
- 238000007664 blowing Methods 0.000 abstract description 4
- 238000002844 melting Methods 0.000 abstract description 3
- 230000008018 melting Effects 0.000 abstract description 3
- 230000005611 electricity Effects 0.000 abstract 1
- 238000002474 experimental method Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 239000012744 reinforcing agent Substances 0.000 description 2
- 238000012369 In process control Methods 0.000 description 1
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010965 in-process control Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Classifications
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- 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
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/1003—Use of special medium during sintering, e.g. sintering aid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/1003—Use of special medium during sintering, e.g. sintering aid
- B22F3/1007—Atmosphere
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
- C22C30/02—Alloys containing less than 50% by weight of each constituent containing copper
-
- 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
- C22C32/0005—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 at least one oxide and at least one of carbides, nitrides, borides or silicides as the main non-metallic constituents
-
- 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
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
- B22F2009/042—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling using a particular milling fluid
-
- 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
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
- B22F2009/043—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling by ball milling
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Powder Metallurgy (AREA)
Abstract
The invention discloses wear-resistant corrosion-resistant nickel-based powder for preparing gradient ceramics and a metallurgical preparation method, wherein the preparation method comprises the following steps of proportioning the components of the corrosion-resistant nickel-based powder, and filling inert protective gas into a mixing device; grinding the nickel-based powder, adding the ground nickel-based powder into a ball mill, repeatedly rotating the ball mill, grinding for 1-2 hours, drying and sieving to obtain spherical-like particles with the size of 40-50 microns on the surface, and adding the particles into a mixing device; purging and mixing; step four: static electricity eliminating and standing settling method; step five: discharging, and sintering and forming by an oxygen-free sintering method; step six: the surface is cooled for 1-1.5h without oxygen to generate an anti-corrosion composite crystal layer, the invention improves the fluidity of the nickel-based powder at the low melting point by adding sintering agent to perfect the nickel-based powder, realizes the improvement of the particle appearance into a quasi-spherical shape by a ball mill and a blowing mixing method and then fully mixes, increases the fluidity of the powder when being heated, can quickly form a uniform crystal layer, simultaneously improves the characteristics of corrosion resistance and high temperature resistance, and increases the sintering efficiency of the nickel-based powder.
Description
Technical Field
The invention relates to the technical field of anti-corrosion coatings, in particular to wear-resistant and corrosion-resistant nickel-based powder for preparing gradient ceramics and a metallurgical preparation method.
Background
In chemical plants or semiconductor plants, various corrosive chemicals can be used due to the requirements of production processes or manufacturing processes, and various corrosion-resistant metal materials, such as corrosion-resistant mechanical arms, corrosion-resistant push rods, acid-base-resistant exhaust pipelines inside a machine table and the like, can be used in process control, so that various leakage accidents are easily caused if corrosion resistance of structural members is insufficient, and casualties and property loss are caused. The corrosion-resistant structural member prepared by the existing proportioning nickel-based powder through metallurgy still needs to be improved in acid and alkali corrosion resistance.
Most of nickel-based powder metallurgy methods in the market adopt an oxygen-free sintering method, the flowability of powder in a molten state is poor in the sintering process of the oxygen-free sintering, and the sintering efficiency is influenced by the slow forming factor. Meanwhile, the crystal layer in a molten state is formed slowly due to insufficient mixing of the alloy powder, and the structure is disordered.
In order to solve the problems, the wear-resistant and corrosion-resistant nickel-based powder for preparing the gradient ceramics and a metallurgical preparation method are provided.
Disclosure of Invention
The invention aims to provide wear-resistant and corrosion-resistant nickel-based powder for preparing gradient ceramics and a metallurgical preparation method, wherein the fluidity of the nickel-based powder at a low melting point is increased by adding sintering agents to improve the nickel-based powder, the appearance of particles is improved to be similar to a sphere by a ball mill and a blowing and mixing method and then is fully mixed, the fluidity of the powder is increased when the powder is heated, a uniform crystal layer can be quickly formed, the characteristics of corrosion resistance and high temperature resistance are improved, and the sintering efficiency of the nickel-based powder is increased.
The technical scheme of the invention is realized as follows:
the wear-resistant corrosion-resistant nickel-based powder metallurgy preparation method based on gradient ceramic preparation comprises the following steps: filling inert protective gas into a mixing device, wherein the protective gas is nitrogen and the purity is 4N; grinding the nickel-based powder, adding the ground nickel-based powder into a ball mill, repeatedly rotating the ball mill, grinding for 1-2 hours, sieving to obtain spherical-like particles with the particle size of 40-50 microns, and adding the spherical-like particles into a mixing device; purging and stirring the nickel-based powder by using inert gas with the pressure of 0.8-1.0Mpa, and fully mixing the nickel-based powder after purging for 10 min; step four: static elimination and standing sedimentation method, standing for 2-3h until nickel-based mixed powder is settled, and connecting a mixing bin inside the mixing device with a shell to be grounded for eliminating static to prevent powder adsorption; step five: discharging, and sintering and forming by an oxygen-free sintering method; step six: and (5) cooling the surface for 1-1.5h without oxygen to generate a corrosion-resistant composite crystal layer.
Further, in the second step, the ball mill places the dried nickel-based powder in a rotating turntable which is inclined by 30-60 degrees, and continuously grinds the corners of the nickel-based powder, so that the shape of the nickel-based powder particles tends to be spherical.
Furthermore, the wetting agent comprises 10 parts of carbon powder and 90 parts of distilled water, and the particle size of the carbon powder is less than 10 um.
Further, in the third step, the nickel-based powder is subjected to purging and mixing under the constant temperature condition, the temperature is 30-40 ℃, the flow speed of the purging gas is 5-7m/s, and the powder of each component is fully mixed through purging and mixing.
Further, in the sixth step, an atmosphere protection sintering furnace is selected for the oxygen-free sintering, and the oxygen-free sintering temperature is 1300-1400 ℃.
Further, in step five, the atmosphere protection sintering furnace power: 8000W, temperature control precision: ± 1 ℃, cavity size: 400 × 300 × 200mm, working vacuum value: 50-80 pa.
Furthermore, the material used in the metallurgical preparation method of the wear-resistant and corrosion-resistant nickel-based powder for preparing the gradient ceramics is corrosion-resistant nickel-based powder.
A corrosion-resistant nickel-based powder comprises the following components in percentage by mass: 10-14 parts of copper powder, 26-35 parts of nickel powder, 20-25 parts of iron powder, 5-11 parts of zinc oxide, 5-10 parts of sintering agent, 1-5 parts of aluminum oxide, 2-10 parts of silicon carbide, 0.5-1.5 parts of silicon dioxide, 0.5-1.5 parts of chromium and 0.5-1.5 parts of titanium, wherein the impurity content of iron oxide and copper oxide is less than or equal to 0.005 part.
Further, the sintering agent comprises: 10-25 parts of tin, 10-20 parts of lead, 30-45 parts of carbon powder and 25-40 parts of zinc oxide.
The invention has the beneficial effects that:
(1) according to the invention, the wetting agent is added into the ball mill to polish the appearance of the nickel-based powder into the spheroidal shape, the wetting agent is composed of distilled water and carbon powder, the corners of the nickel-based powder particles can be polished by the carbon powder particles while the nickel-based powder particles are wetted, the polishing efficiency is improved, the fluidity and the flowing capacity of the nickel-based powder after being heated are increased by polishing the appearance of the nickel-based powder into the spheroidal shape, and the sintering efficiency is improved.
(2) The method has the advantages that the powder is fully mixed by a blowing method, the melting point of the alloy powder is reduced by adding the sintering agent, a uniform crystal layer can be quickly formed in the oxygen-free sintering process, the preparation efficiency of the composite material is improved, and meanwhile, the composite material prepared from the nickel-based powder has the advantages of better corrosion resistance, high temperature resistance and the like compared with the composite material prepared from the existing nickel alloy chemical powder.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
According to the embodiment of the invention, wear-resistant and corrosion-resistant nickel-based powder for preparing gradient ceramics and a metallurgical preparation method are provided.
Example one
Taking corrosion-resistant nickel-based powder, which comprises 10 parts of copper powder, 26 parts of nickel powder, 26 parts of iron powder, 11 parts of zinc oxide, 10 parts of sintering agent, 5 parts of aluminum oxide, 8 parts of silicon carbide, 1.5 parts of silicon dioxide, 1.5 parts of chromium and 1 part of titanium, wherein the impurity content of iron oxide and copper oxide is less than or equal to 0.005 part.
Sintering agent: 10 parts of tin, 10 parts of lead, 40 parts of carbon powder and 40 parts of zinc oxide.
The metallurgical preparation method comprises the following steps: filling inert protective gas into a mixing device, wherein the protective gas is nitrogen and the purity is 4N; step two, grinding the nickel-based powder, adding the ground nickel-based powder into a ball mill, putting the nickel-based powder into a rotating inclined turntable, adding a wetting agent, and repeatedly rotating the ball mill by a rotation angle: 0-30 degrees, the rotating speed is 200-; purging and stirring the nickel-based powder by using inert gas with the pressure of 0.8-1.0Mpa, and fully mixing the nickel-based powder after purging for 10 min; step four: static elimination and standing sedimentation method, standing for 2-3h until nickel-based mixed powder is settled, and connecting a mixing bin inside the mixing device with a shell to be grounded for eliminating static to prevent powder adsorption; step five: discharging, and sintering and forming by an oxygen-free sintering method; step six: and (5) cooling the surface for 1-1.5h without oxygen to generate a corrosion-resistant composite crystal layer.
Example two
Taking corrosion-resistant nickel-based powder, which comprises 14 parts of copper powder, 35 parts of nickel powder, 20 parts of iron powder, 7 parts of zinc oxide, 5 parts of reinforcing agent, 5 parts of aluminum oxide, 10 parts of silicon carbide, 1.5 parts of silicon dioxide, 1.5 parts of chromium and 1 part of titanium, wherein the impurity content of iron oxide and copper oxide is less than or equal to 0.005 part.
Reinforcing agent: 20 parts of tin, 20 parts of lead, 30 parts of carbon powder and 30 parts of zinc oxide.
The metallurgical preparation method comprises the following steps: filling inert protective gas into a mixing device, wherein the protective gas is nitrogen and the purity is 4N; step two, grinding the nickel-based powder, adding the ground nickel-based powder into a ball mill, putting the nickel-based powder into a rotating inclined turntable, adding a wetting agent, and repeatedly rotating the ball mill by a rotation angle: 0-30 degrees, the rotating speed is 200-; purging and stirring the nickel-based powder by using inert gas with the pressure of 0.8-1.0Mpa, and fully mixing the nickel-based powder after purging for 10 min; step four: static elimination and standing sedimentation method, standing for 2-3h until nickel-based mixed powder is settled, and connecting a mixing bin inside the mixing device with a shell to be grounded for eliminating static to prevent powder adsorption; step five: discharging, and sintering and forming by an oxygen-free sintering method; step six: and (5) cooling the surface for 1-1.5h without oxygen to generate a corrosion-resistant composite crystal layer.
Experimental test 1
Taking 6 groups of 4 parts of 100g of the nickel-based powder A, B, C, D, E, F, wherein A, B groups of experimental variables are whether the nickel-based powder is ground by a ball mill or not and under the condition that other experimental conditions are not changed; C. the group D experiment variables are whether purging mixing is carried out or not, and other experiment conditions are not changed; E. f group of experimental variables are whether sintering agents are added or not, and other experimental conditions are not changed; the above 6 groups are all sintered and prepared by the preparation process provided by the invention, and finally the comparison of sintering and forming time is carried out, and the experimental results are as follows:
according to the experimental result, A, B groups of nickel-based powder particles are subjected to ball mill grinding under the condition that other experimental conditions are unchanged, and the sintering efficiency is improved by nearly 25% in the sintering process; according to the experimental result, B, C groups of nickel-based powder particles are subjected to blowing mixing, and the sintering efficiency is improved by nearly 15% in the sintering process under the condition that other experimental conditions are unchanged; the result of the experiment shows that E, F groups of nickel-based powder particles added with the sintering agent have the sintering efficiency improved by nearly 22% in the sintering process under the condition that other experimental conditions are unchanged.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (9)
1. The wear-resistant corrosion-resistant nickel-based powder metallurgy preparation method based on gradient ceramic preparation is characterized by comprising the following steps of: filling inert protective gas into a mixing device, wherein the protective gas is nitrogen and the purity is 4N;
grinding the nickel-based powder, adding the ground nickel-based powder into a ball mill, repeatedly rotating the ball mill, grinding for 1-2 hours, drying and sieving to obtain spherical-like particles with the size of 40-50 microns on the surface, and adding the particles into a mixing device;
purging and stirring the nickel-based powder by using inert gas with the pressure of 0.8-1.0Mpa, and fully mixing the nickel-based powder after purging for 10 min;
step four: static elimination and standing sedimentation method, standing for 2-3h until nickel-based mixed powder is settled, and connecting a mixing bin inside the mixing device with a shell to be grounded for eliminating static to prevent powder adsorption;
step five: discharging, and sintering and forming by an oxygen-free sintering method; step six: and (5) cooling the surface for 1-1.5h without oxygen to generate a corrosion-resistant composite crystal layer.
2. The method for metallurgically preparing the wear-resistant and corrosion-resistant nickel-based powder for gradient ceramic manufacture according to claim 1, wherein in the second step, the ball mill places the nickel-based powder in a rotating inclined rotating disc and adds the wetting agent, and the rotating angle is as follows: and the rotation speed is 200-30 DEG, 300 circles/min, and the corners of the nickel-based powder are continuously polished, so that the shape of the nickel-based powder particles tends to be spherical.
3. The method for metallurgically preparing the wear-resistant and corrosion-resistant nickel-based powder for gradient ceramic preparation according to claim 2, wherein the wetting agent comprises 10 parts of carbon powder with a particle size of less than 10um and 90 parts of distilled water.
4. The method for preparing the wear-resistant and corrosion-resistant nickel-based powder for gradient ceramic preparation according to claim 1, wherein in the third step, the nickel-based powder is subjected to purging and mixing under a constant temperature condition, the temperature is 30-40 ℃, the flow speed of the purging gas is 5-7m/s, and the powders of the components are fully mixed through purging and mixing.
5. The method for preparing wear-resistant and corrosion-resistant nickel-based powder metallurgy based on gradient ceramic preparation as claimed in claim 1, wherein in the sixth step, an atmosphere protection sintering furnace is selected for the oxygen-free sintering, and the oxygen-free sintering temperature is 1300-1400 ℃.
6. The method for preparing wear-resistant and corrosion-resistant nickel-based powder metallurgy based on gradient ceramic preparation according to claim 1, wherein in step five, the atmosphere protection sintering furnace power is: 8000W, temperature control precision: ± 1 ℃, cavity size: 400 × 300 × 200mm, working vacuum value: 50-80 pa.
7. The wear-resistant corrosion-resistant nickel-based powder for gradient ceramic preparation and the metallurgical preparation method thereof according to claims 1-6, wherein the material used in the metallurgical preparation method is a corrosion-resistant nickel-based powder.
8. A corrosion-resistant nickel-based powder, characterized in that the composition fractions are (in mass percent): 10-14 parts of copper powder, 26-35 parts of nickel powder, 20-25 parts of iron powder, 5-11 parts of zinc oxide, 5-10 parts of sintering agent, 1-5 parts of aluminum oxide, 2-10 parts of silicon carbide, 0.5-1.5 parts of silicon dioxide, 0.5-1.5 parts of chromium and 0.5-1.5 parts of titanium, wherein the impurity content of iron oxide and copper oxide is less than or equal to 0.005 part.
9. A corrosion-resistant nickel-based powder according to claim 1, characterized in that the sintering agent comprises: 10-25 parts of tin, 10-20 parts of lead, 30-45 parts of carbon powder and 25-40 parts of zinc oxide.
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110020662A1 (en) * | 2009-07-22 | 2011-01-27 | Kazutaka Okamoto | Sintered porous metal body and a method of manufacturing the same |
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| CN113322397A (en) * | 2021-05-27 | 2021-08-31 | 宁波金田铜业(集团)股份有限公司 | Preparation method of powder metallurgy copper-iron alloy strip with excellent bending performance |
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| US20110020662A1 (en) * | 2009-07-22 | 2011-01-27 | Kazutaka Okamoto | Sintered porous metal body and a method of manufacturing the same |
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