CN111379004A - Method for improving abrasion resistance of high-strength steel pump head body - Google Patents
Method for improving abrasion resistance of high-strength steel pump head body Download PDFInfo
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- CN111379004A CN111379004A CN202010384851.6A CN202010384851A CN111379004A CN 111379004 A CN111379004 A CN 111379004A CN 202010384851 A CN202010384851 A CN 202010384851A CN 111379004 A CN111379004 A CN 111379004A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 45
- 239000010959 steel Substances 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000005299 abrasion Methods 0.000 title claims abstract description 33
- 238000009713 electroplating Methods 0.000 claims abstract description 29
- 239000002245 particle Substances 0.000 claims abstract description 10
- 239000000843 powder Substances 0.000 claims description 45
- 239000000243 solution Substances 0.000 claims description 42
- 229910010293 ceramic material Inorganic materials 0.000 claims description 32
- 238000002156 mixing Methods 0.000 claims description 29
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 21
- 239000002131 composite material Substances 0.000 claims description 18
- 239000007864 aqueous solution Substances 0.000 claims description 15
- 238000000498 ball milling Methods 0.000 claims description 15
- 150000001875 compounds Chemical class 0.000 claims description 15
- 239000002270 dispersing agent Substances 0.000 claims description 15
- 238000004070 electrodeposition Methods 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 14
- 239000006185 dispersion Substances 0.000 claims description 13
- 238000005245 sintering Methods 0.000 claims description 12
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 10
- 239000002202 Polyethylene glycol Substances 0.000 claims description 10
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 10
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 claims description 10
- 229920001223 polyethylene glycol Polymers 0.000 claims description 10
- 239000011241 protective layer Substances 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 9
- VEQPNABPJHWNSG-UHFFFAOYSA-N Nickel(2+) Chemical compound [Ni+2] VEQPNABPJHWNSG-UHFFFAOYSA-N 0.000 claims description 6
- 239000000919 ceramic Substances 0.000 claims description 6
- 229910001453 nickel ion Inorganic materials 0.000 claims description 6
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 5
- BCKXLBQYZLBQEK-KVVVOXFISA-M Sodium oleate Chemical compound [Na+].CCCCCCCC\C=C/CCCCCCCC([O-])=O BCKXLBQYZLBQEK-KVVVOXFISA-M 0.000 claims description 5
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- 239000011812 mixed powder Substances 0.000 claims description 5
- RRIWRJBSCGCBID-UHFFFAOYSA-L nickel sulfate hexahydrate Chemical compound O.O.O.O.O.O.[Ni+2].[O-]S([O-])(=O)=O RRIWRJBSCGCBID-UHFFFAOYSA-L 0.000 claims description 5
- 229940116202 nickel sulfate hexahydrate Drugs 0.000 claims description 5
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 5
- 229920000036 polyvinylpyrrolidone Polymers 0.000 claims description 5
- 239000001267 polyvinylpyrrolidone Substances 0.000 claims description 5
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 238000005303 weighing Methods 0.000 claims description 5
- 238000004321 preservation Methods 0.000 claims description 4
- 238000000576 coating method Methods 0.000 abstract description 10
- 239000011248 coating agent Substances 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000007547 defect Effects 0.000 abstract description 3
- 238000005054 agglomeration Methods 0.000 abstract description 2
- 230000002776 aggregation Effects 0.000 abstract description 2
- 239000002086 nanomaterial Substances 0.000 abstract description 2
- 238000011160 research Methods 0.000 abstract description 2
- 238000005260 corrosion Methods 0.000 description 24
- 230000007797 corrosion Effects 0.000 description 24
- 208000035874 Excoriation Diseases 0.000 description 23
- 238000012360 testing method Methods 0.000 description 16
- 238000007747 plating Methods 0.000 description 11
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- 239000010410 layer Substances 0.000 description 6
- 238000005507 spraying Methods 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 150000003839 salts Chemical class 0.000 description 5
- 239000007921 spray Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000011161 development Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 238000005728 strengthening Methods 0.000 description 4
- 238000001132 ultrasonic dispersion Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 238000007873 sieving Methods 0.000 description 3
- 238000001291 vacuum drying Methods 0.000 description 3
- 239000011787 zinc oxide Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012827 research and development Methods 0.000 description 2
- 238000007619 statistical method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000003805 vibration mixing Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910000423 chromium oxide Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 239000002659 electrodeposit Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000011253 protective coating Substances 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 235000011149 sulphuric acid Nutrition 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D15/00—Electrolytic or electrophoretic production of coatings containing embedded materials, e.g. particles, whiskers, wires
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/56—Electroplating: Baths therefor from solutions of alloys
- C25D3/562—Electroplating: Baths therefor from solutions of alloys containing more than 50% by weight of iron or nickel or cobalt
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D7/00—Electroplating characterised by the article coated
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electroplating Methods And Accessories (AREA)
Abstract
The invention relates to the technical field of pump performance research, and discloses a method for improving the abrasion resistance of a high-strength steel pump head body. Overcomes the defect of easy agglomeration existing in the prior art that the nano material is added into the electroplating solution, can form a uniformly dispersed coating, and has stronger practical application value. The method for improving the abrasion resistance of the high-strength steel has the characteristics of convenience in operation, stable performance, low manufacturing cost and the like, can resist the abrasion of medium abrasive particles, is suitable for severe working conditions, and has a good working state.
Description
Technical Field
The invention belongs to the technical field of pump performance research, and particularly relates to a method for improving the abrasion resistance of a high-strength steel pump head body.
Background
A pump is a machine that delivers or pressurizes a fluid, and transfers mechanical energy of a prime mover or other external energy to the fluid, causing the fluid to be energized. In order to prolong the service life of the pump head body, high-strength steel with better performance is generally adopted for processing, and compared with common strength steel, the high-strength steel has higher yield strength and tensile strength. Therefore, replacing the general strength steel member with the high strength steel member can reduce the sectional size, save steel consumption, and reduce manufacturing, transportation, and installation costs. The application of the high-strength steel not only can embody higher structural efficiency, but also can bring considerable economic and social benefits.
The demand of the modern society for energy is getting bigger and bigger, and the pump plays an important role in energy exploitation. The mining difficulty is increased, the working environment of the pump is also very severe, high-pressure fatigue exists, the concentration of corrosive media is high, large-particle scouring friction and other adverse environments exist, along with stress concentration in the use process, the use corrosion resistance fatigue of the pump head body in corrosive liquid is remarkably reduced, corrosion fatigue cracks, surface pitting corrosion pits and the like appear, more secondary cracks can be generated without treatment, the abrasion is aggravated, and the depth is deeper until the secondary cracks are broken.
The existing anti-abrasion treatment method mostly adopts a method of spraying a layer of anti-abrasion coating on the surface, and the common anti-abrasion coating can not play a role in protection under a severe working environment. In view of the above, a protection measure for a high-strength steel pump head body adapted to an extreme working environment is required.
Disclosure of Invention
The invention aims to provide a method for improving the abrasion resistance of a high-strength steel pump head body aiming at the existing problems, and the prepared coating has high abrasion resistance and high corrosion resistance.
The invention is realized by the following technical scheme:
a method for improving the abrasion resistance of a high-strength steel pump head body comprises the following main technical means: the prepared nano ceramic material is introduced into the electroplating solution by adopting a composite electrodeposition technology, so that the corrosion resistance and the wear resistance of the plating layer are improved, a firm surface strengthening effect is exerted on the high-strength steel pump head body, and the high-strength steel pump head body can adapt to a severe working environment;
specifically, the preparation of the nano ceramic material comprises the following process steps:
weighing alumina powder and yttrium oxide powder according to the mass ratio of 18-20:1.0-1.2, placing the alumina powder and yttrium oxide powder in a vibration mill, vibrating and mixing for 2-3 hours, stopping for 10-15 minutes every 30-40 minutes of vibration, taking out the mixed powder, adding 1.2-1.3 times of polyvinyl alcohol solution with the mass concentration of 3.0-3.5% into the powder, placing the powder in a mixing mill for high-speed mixing for 20-25 minutes at the mixing speed of 3600-, the heat preservation sintering time is 100-120 minutes, and the mixture is placed in an oven with the temperature of 80-90 ℃ for drying for 6-10 hours after natural cooling; the grain size of the nano ceramic material is between 25 and 35 nanometers.
Dispersing the prepared nano ceramic material into a compound dispersing agent, wherein the material-liquid ratio is 1:13-15, carrying out ball milling for 1-2 hours, adding polyethylene glycol accounting for 3.5-4.5% of the mass of the compound dispersing agent, carrying out ultrasonic dispersion for 10-15 minutes to obtain nano ceramic material dispersion, adding the nano ceramic material dispersion into a basic electroplating solution, wherein the addition accounts for 22-27% of the mass of the basic electroplating solution, continuing ball milling for 20-30 minutes, adjusting the pH value of a system to be 3.3-3.5 by using dilute sulfuric acid, carrying out ball milling for 0.5-1.0 hour to obtain a composite electroplating solution, and carrying out electrodeposition on nano ceramic particles and nickel ions together on a high-strength steel pump workpiece to form a compact protective layer with the thickness of 12.0-15.0 microns by using a composite electrodeposition method.
The compound dispersing agent is obtained by mixing a sodium oleate aqueous solution with the mass concentration of 3.0-3.5% and a polyvinylpyrrolidone aqueous solution with the mass concentration of 5.0-6.0% according to the mass ratio of 7-8: 3-4.
The molecular weight of the polyethylene glycol is 2000.
The basic electroplating solution is prepared by dissolving nickel sulfate hexahydrate in phosphoric acid aqueous solution with the molar concentration of 2.3-2.5 mol/L according to the mass ratio of 1:12-14 of the feed liquid, and continuously stirring for 2.0-3.0 hours.
The molar concentration of the dilute sulfuric acid is 5.0-5.5 mol/L.
The nano ceramic material prepared by the invention has high specific surface area and high hardness, can be uniformly dispersed in electroplating solution, is easy to combine with high-strength steel to be stabilized, has compact deposited protective layer, does not have through holes, has smooth surface, has good offset effect on impact force, and has remarkable effect on improving the corrosion resistance and the wear resistance of the pump head body.
Compared with the prior art, the invention has the following advantages: in order to solve the problem that the existing high-strength steel pump head body is not resistant to abrasion in a special working environment, the invention provides a method for improving the abrasion resistance of the high-strength steel pump head body, obtains composite electroplating solution with uniform dispersion and good stability, and electrodeposits nano ceramic particles and nickel ions on a to-be-plated part of the high-strength steel pump head body together by a composite electrodeposition method to form a compact protective layer with the thickness of 12.0-15.0 microns, thereby overcoming the defects that the existing protective coating is poor in abrasion resistance, through holes in the coating are easy to corrode and crack and the like; the invention can enhance the combination property of the plating layer and the high-strength steel while improving the dispersion property of the nano ceramic material in the electroplating solution, overcomes the defect of easy agglomeration existing in the existing nano material added into the electroplating solution, can form a uniformly dispersed plating layer, and has stronger practical application value. The method for improving the abrasion resistance of the high-strength steel has the characteristics of convenience in operation, stable performance, low manufacturing cost and the like, can resist the abrasion of medium abrasive particles, is suitable for the condition of very severe working condition, has good working state, can meet the performance requirement of high-demand energy exploitation and transportation, has the characteristics of low cost and long service life, greatly reduces the waste of high-strength steel resources, can realize the practical significance of research and development of a new-generation high-performance pump corrosion-resistant method and improvement of market competitiveness, has higher value on continuously improved pump requirements, obviously promotes the high-speed development and the sustainable development of resources of a chemical pump, and is a technical scheme which is extremely worthy of popularization and use.
Detailed Description
In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the present invention is further described with reference to specific embodiments, and it should be understood that the specific embodiments described herein are only used for explaining the present invention and are not used for limiting the technical solutions provided by the present invention.
Example 1
A method for improving the abrasion resistance of a high-strength steel pump head body adopts a composite electrodeposition technology, introduces the prepared nano ceramic material into electroplating solution, improves the corrosion resistance and the abrasion resistance of a coating, and plays a firm surface strengthening role on the high-strength steel pump head body;
specifically, the preparation of the nano ceramic material comprises the following process steps:
weighing alumina powder and yttrium oxide powder according to the mass ratio of 18:1.0, placing the alumina powder and yttrium oxide powder in a vibration mill, vibrating and mixing for 2 hours, stopping for 10 minutes every 30 minutes of vibration, taking out the mixed powder, adding 1.2 times of volume of 3.0% polyvinyl alcohol solution in mass concentration into the powder, placing the powder in a mixing mill for high-speed mixing for 20 minutes at the mixing speed of 3600 revolutions per minute, sieving by a 100-mesh sieve after mixing, placing the obtained powder in a 110 ℃ vacuum drying box for drying for 18 hours, mixing the dried powder and zinc oxide according to the mass ratio of 1.3:1.0, placing the powder in a resistance furnace for heating and sintering at the heating speed of 11 ℃/minute and the sintering temperature of 910 ℃, preserving the heat for sintering for 100 minutes, naturally cooling, and placing the powder in an 80 ℃ oven for drying for 6 hours; the grain size of the nano ceramic material is between 25 and 35 nanometers.
Dispersing the prepared nano ceramic material into a compound dispersing agent, wherein the material-liquid ratio is 1:13, carrying out ball milling for 1 hour, adding polyethylene glycol accounting for 3.5 percent of the mass of the compound dispersing agent, carrying out ultrasonic dispersion for 10 minutes to obtain nano ceramic material dispersion liquid, adding the nano ceramic material dispersion liquid into a basic electroplating solution, wherein the addition amount accounts for 22 percent of the mass of the basic electroplating solution, carrying out ball milling for 20 minutes continuously, adjusting the pH value of the system to be 3.3-3.5 by using dilute sulfuric acid, carrying out ball milling for 0.5 hour to obtain composite electroplating solution, and carrying out electrodeposition on nano ceramic particles and nickel ions together on a high-strength steel pump head body to-be-plated part by using a composite electrodeposition method to form a compact protective layer with the thickness of 12.0-15.
The compound dispersing agent is obtained by mixing a sodium oleate aqueous solution with the mass concentration of 3.0% and a polyvinylpyrrolidone aqueous solution with the mass concentration of 5.0% according to the mass ratio of 7: 3.
The molecular weight of the polyethylene glycol is 2000.
The basic electroplating solution is prepared by dissolving nickel sulfate hexahydrate in phosphoric acid aqueous solution with the molar concentration of 2.3 mol/L according to the mass ratio of 1:12 of the solution and continuously stirring for 2.0 hours.
The dilute sulfuric acid molar concentration is 5.0 mol/L.
And (3) testing the corrosion resistance of the prepared protective layer, and measuring by adopting a precise salt water spray testing machine according to the relevant standard of GB/T12105, wherein the corrosion, pitting and other signs do not appear after continuous spraying for 108 hours.
Example 2
A method for improving the abrasion resistance of a high-strength steel pump head body adopts a composite electrodeposition technology, introduces the prepared nano ceramic material into electroplating solution, improves the corrosion resistance and the abrasion resistance of a coating, and plays a firm surface strengthening role on the high-strength steel pump head body;
specifically, the preparation of the nano ceramic material comprises the following process steps:
weighing alumina powder and yttrium oxide powder according to a mass ratio of 19:1.1, placing the alumina powder and yttrium oxide powder in a vibration mill, performing vibration mixing for 2.5 hours, stopping for 12 minutes every 35 minutes of vibration, taking out the mixed powder, adding 1.25 times of volume of 3.2% polyvinyl alcohol solution in mass concentration into the powder, placing the powder in a mixing roll, mixing at a high speed for 22 minutes, wherein the mixing speed is 3700 r/min, sieving by a 110-mesh sieve after mixing, placing the obtained powder in a 115 ℃ vacuum drying oven for drying for 19 hours, mixing the dried powder and zinc oxide according to a mass ratio of 1.4:1.1, placing the powder in a resistance furnace for heating and sintering, wherein the heating speed is 11.5 ℃/min, the sintering temperature is 920 ℃, the heat preservation sintering time is 110 minutes, naturally cooling, and placing the powder in an 85 ℃ drying oven for drying for 8 hours; the grain size of the nano ceramic material is between 25 and 35 nanometers.
Dispersing the prepared nano ceramic material into a compound dispersing agent, wherein the material-liquid ratio is 1:14, carrying out ball milling for 1.5 hours, adding polyethylene glycol accounting for 4.0% of the mass of the compound dispersing agent, carrying out ultrasonic dispersion for 12 minutes to obtain nano ceramic material dispersion liquid, adding the nano ceramic material dispersion liquid into a basic electroplating solution, wherein the addition amount accounts for 25% of the mass of the basic electroplating solution, carrying out ball milling for 25 minutes continuously, adjusting the pH value of the system to be 3.3-3.5 by using dilute sulfuric acid, carrying out ball milling for 0.7 hour to obtain a composite electroplating solution, and carrying out electrodeposition on nano ceramic particles and nickel ions together onto a high-strength steel pump head body to-be-plated part by using a composite electrodeposition method to form a compact protective layer with the thickness of 12.0-.
The compound dispersing agent is obtained by mixing a sodium oleate aqueous solution with the mass concentration of 3.3% and a polyvinylpyrrolidone aqueous solution with the mass concentration of 5.5% according to the mass ratio of 7.5: 3.5.
The molecular weight of the polyethylene glycol is 2000.
The basic electroplating solution is prepared by dissolving nickel sulfate hexahydrate in phosphoric acid aqueous solution with the molar concentration of 2.4 mol/L according to the mass ratio of 1:13 and continuously stirring for 2.5 hours.
The dilute sulfuric acid molar concentration is 5.3 mol/L.
And (3) testing the corrosion resistance of the prepared protective layer, and measuring by adopting a precise salt water spray testing machine according to the relevant standard of GB/T12105, wherein the corrosion, pitting and other signs do not appear after continuous spraying for 108 hours.
Example 3
A method for improving the abrasion resistance of a high-strength steel pump head body adopts a composite electrodeposition technology, introduces the prepared nano ceramic material into electroplating solution, improves the corrosion resistance and the abrasion resistance of a coating, and plays a firm surface strengthening role on the high-strength steel pump head body;
specifically, the preparation of the nano ceramic material comprises the following process steps:
weighing alumina powder and yttrium oxide powder according to the mass ratio of 20:1.2, placing the alumina powder and yttrium oxide powder in a vibration mill, performing vibration mixing for 3 hours, stopping vibration for 15 minutes every 40 minutes, taking out the mixed powder, adding 1.3 times of volume of 3.5% polyvinyl alcohol solution in mass concentration into the powder, placing the powder in a mixing roll, performing high-speed mixing for 25 minutes at the mixing speed of 3800 rpm, sieving the powder by a 120-mesh sieve after mixing, placing the obtained powder in a 120-DEG C vacuum drying box for drying for 20 hours, mixing the dried powder and zinc oxide according to the mass ratio of 1.5:1.2, placing the powder in a resistance furnace for heating and sintering at the heating speed of 12 ℃/minute and the sintering temperature of 930 ℃, performing heat preservation and sintering for 120 minutes, naturally cooling, and placing the powder in a 90-DEG C oven for drying for 10 hours; the grain size of the nano ceramic material is between 25 and 35 nanometers.
Dispersing the prepared nano ceramic material into a compound dispersing agent, wherein the material-liquid ratio is 1:15, carrying out ball milling for 2 hours, adding polyethylene glycol accounting for 4.5 percent of the mass of the compound dispersing agent, carrying out ultrasonic dispersion for 15 minutes to obtain nano ceramic material dispersion liquid, adding the nano ceramic material dispersion liquid into a basic electroplating solution, wherein the addition amount accounts for 27 percent of the mass of the basic electroplating solution, carrying out ball milling for 30 minutes continuously, adjusting the pH value of the system to be 3.3-3.5 by using dilute sulfuric acid, carrying out ball milling for 1.0 hour to obtain composite electroplating solution, and carrying out electrodeposition on nano ceramic particles and nickel ions together on a high-strength steel pump head body to-be-plated part by using a composite electrodeposition method to form a compact protective layer with the thickness of 12.0-15.
The compound dispersing agent is obtained by mixing a sodium oleate aqueous solution with the mass concentration of 3.5% and a polyvinylpyrrolidone aqueous solution with the mass concentration of 6.0% according to the mass ratio of 8: 4.
The molecular weight of the polyethylene glycol is 2000.
The basic electroplating solution is prepared by dissolving nickel sulfate hexahydrate in phosphoric acid aqueous solution with the molar concentration of 2.5 mol/L according to the mass ratio of 1:14 of the solution and continuously stirring for 3.0 hours.
The dilute sulfuric acid molar concentration is 5.5 mol/L.
And (3) testing the corrosion resistance of the prepared protective layer, and measuring by adopting a precise salt water spray testing machine according to the relevant standard of GB/T12105, wherein the corrosion, pitting and other signs do not appear after continuous spraying for 108 hours.
Comparative example 1
The difference from example 3 is that the nano chromium oxide powder was added to the base plating solution so that the concentration reached 150 g/l, and the plating was carried out as a composite plating solution, and the rest was kept constant.
And (3) carrying out corrosion resistance test on the prepared plating layer, adopting a precise salt water spray tester to carry out measurement according to the relevant standard of GB/T12105, and continuously spraying for 72 hours without the signs of corrosion, pitting corrosion and the like.
Comparative example 2
The difference from example 3 is that the nano-titania powder was added to the base plating solution so that the concentration reached 120 g/l, and the plating was carried out as a composite plating solution, and the rest was kept constant.
And (3) carrying out corrosion resistance test on the prepared plating layer, adopting a precise salt water spray tester to carry out measurement according to the relevant standard of GB/T12105, and continuously spraying for 72 hours without the signs of corrosion, pitting corrosion and the like.
First, performance experiment
The method for improving the abrasion resistance of the high-strength steel pump head body by using the methods of examples 1-3 and comparative examples 1-2 is adopted, and the control group uses a surface coating method of an oil pump for the oil extraction process, which is disclosed by the publication number CN108893765A, as a control; the high-strength steel used for the test is 25Cr2Ni4MoV, the surface coating is prepared according to the method of each formula, the performance test is carried out on the optimized samples (5 pieces in each group) prepared by each group, and the final average value is obtained. Keeping the independent variables consistent in the test, performing result statistical analysis (designing the test by statistical method before the test, then performing the test, recording the test data, analyzing to obtain the test result, and fully using the statistical tool to explain the result to the maximum extent in the process)
Secondly, the experimental result is as follows:
| item | Hardness (HV) | Coefficient of friction | Corrosive wear g/(m 2. h) |
| Example 1 | 618 | 0.22 | 0.018 |
| Example 2 | 621 | 0.21 | 0.015 |
| Example 3 | 616 | 0.22 | 0.019 |
| Comparative example 1 | 595 | 0.32 | 0.158 |
| Comparative example 2 | 587 | 0.28 | 0.144 |
| Control group | 612 | 0.23 | 0.021 |
(treatment in a 15wt.% H2SO4 solution containing 100g/L SiO2 at 70 ℃ for 24H at 1000rpm, cleaning the surface after removal, testing for corrosion wear)
The method for improving the abrasion resistance of the high-strength steel has the characteristics of convenience in operation, stable performance, low manufacturing cost and the like, can resist the abrasion of medium abrasive particles, is suitable for the condition of very severe working condition, has good working state, can meet the performance requirement of high-demand energy exploitation and transportation, has the characteristics of low cost and long service life, greatly reduces the waste of high-strength steel resources, can realize the practical significance of research and development of a new-generation high-performance pump corrosion-resistant method and improvement of market competitiveness, has higher value on continuously improved pump requirements, obviously promotes the high-speed development and the sustainable development of resources of a chemical pump, and is a technical scheme which is extremely worthy of popularization and use.
Claims (6)
1. A method for improving the abrasion resistance of a high-strength steel pump head body is characterized by comprising the following steps:
(1) weighing alumina powder and yttrium oxide powder according to the mass ratio of 18-20:1.0-1.2, placing the alumina powder and yttrium oxide powder in a vibration mill, vibrating and mixing for 2-3 hours, stopping for 10-15 minutes every 30-40 minutes of vibration, taking out the mixed powder, adding 1.2-1.3 times of polyvinyl alcohol solution with the mass concentration of 3.0-3.5% into the powder, placing the powder in a mixing mill for high-speed mixing for 20-25 minutes at the mixing speed of 3600-, the sintering temperature is 910-930 ℃, the heat preservation sintering time is 100-120 minutes, and the nano ceramic material is obtained after natural cooling and drying in an oven at 80-90 ℃ for 6-10 hours;
(2) dispersing the nano ceramic material prepared in the step (1) into a compound dispersing agent, ball-milling for 1-2 hours at a material-liquid ratio of 1:13-15, adding polyethylene glycol accounting for 3.5-4.5% of the mass of the compound dispersing agent, ultrasonically dispersing for 10-15 minutes to obtain nano ceramic material dispersion, adding the nano ceramic material dispersion into a basic electroplating solution, adding the nano ceramic material dispersion into the basic electroplating solution, continuing ball-milling for 20-30 minutes, adjusting the pH value of the system to be 3.3-3.5 by using dilute sulfuric acid, ball-milling for 0.5-1.0 hour to obtain a composite electroplating solution, and electrodepositing nano ceramic particles and nickel ions on a high-strength steel pump head body to-be-plated part by a composite electrodeposition method to form a compact protective layer with the thickness of 12.0-15.0 microns.
2. The method for improving the abrasion resistance of the high-strength steel pump head body according to claim 1, wherein the grain size of the nano ceramic material in the step (1) is 25-35 nm.
3. The method for improving the abrasion resistance of the high-strength steel pump head body according to claim 1, wherein the compound dispersant in the step (2) is obtained by mixing a sodium oleate aqueous solution with the mass concentration of 3.0-3.5% and a polyvinylpyrrolidone aqueous solution with the mass concentration of 5.0-6.0% according to the mass ratio of 7-8: 3-4.
4. The method for improving the abrasion resistance of the high-strength steel pump head body according to claim 1, wherein the molecular weight of the polyethylene glycol in the step (2) is 2000.
5. The method for improving the abrasion resistance of the high-strength steel pump head body according to claim 1, wherein the base electroplating solution in the step (2) is obtained by dissolving nickel sulfate hexahydrate in phosphoric acid aqueous solution with the molar concentration of 2.3-2.5 mol/L according to the feed liquid mass ratio of 1:12-14 and continuously stirring for 2.0-3.0 hours.
6. The method for improving the abrasion resistance of the high-strength steel pump head body according to claim 1, wherein the dilute sulfuric acid in the step (2) has a molar concentration of 5.0 to 5.5 mol/l.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112064068A (en) * | 2020-09-28 | 2020-12-11 | 泗县金皖泵业有限公司 | Composite electroplating solution for alloy steel electric submersible pump |
| CN114990672A (en) * | 2022-06-23 | 2022-09-02 | 安徽卧龙泵阀股份有限公司 | Electroplating method for improving wear resistance of pump parts |
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2020
- 2020-05-09 CN CN202010384851.6A patent/CN111379004A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112064068A (en) * | 2020-09-28 | 2020-12-11 | 泗县金皖泵业有限公司 | Composite electroplating solution for alloy steel electric submersible pump |
| CN114990672A (en) * | 2022-06-23 | 2022-09-02 | 安徽卧龙泵阀股份有限公司 | Electroplating method for improving wear resistance of pump parts |
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Application publication date: 20200707 |