CN112844995A - Metal part surface machining process for improving corrosion resistance - Google Patents
Metal part surface machining process for improving corrosion resistance Download PDFInfo
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- CN112844995A CN112844995A CN202011615480.4A CN202011615480A CN112844995A CN 112844995 A CN112844995 A CN 112844995A CN 202011615480 A CN202011615480 A CN 202011615480A CN 112844995 A CN112844995 A CN 112844995A
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- machining process
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- 238000005260 corrosion Methods 0.000 title claims abstract description 72
- 230000007797 corrosion Effects 0.000 title claims abstract description 71
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 58
- 239000002184 metal Substances 0.000 title claims abstract description 58
- 238000003754 machining Methods 0.000 title claims description 18
- 239000000843 powder Substances 0.000 claims abstract description 63
- 238000000576 coating method Methods 0.000 claims abstract description 55
- 238000005507 spraying Methods 0.000 claims abstract description 54
- 239000011248 coating agent Substances 0.000 claims abstract description 48
- 239000000126 substance Substances 0.000 claims abstract description 22
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 16
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 16
- 238000012545 processing Methods 0.000 claims abstract description 11
- 238000005516 engineering process Methods 0.000 claims abstract description 10
- 238000002844 melting Methods 0.000 claims abstract description 7
- 230000008018 melting Effects 0.000 claims abstract description 7
- 239000000758 substrate Substances 0.000 claims abstract description 7
- 239000002923 metal particle Substances 0.000 claims description 36
- 239000000919 ceramic Substances 0.000 claims description 30
- 239000002245 particle Substances 0.000 claims description 30
- 239000003795 chemical substances by application Substances 0.000 claims description 18
- 239000003822 epoxy resin Substances 0.000 claims description 18
- 229920000647 polyepoxide Polymers 0.000 claims description 18
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 12
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 12
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 claims description 12
- 239000012752 auxiliary agent Substances 0.000 claims description 12
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 claims description 12
- 229910002804 graphite Inorganic materials 0.000 claims description 12
- 239000010439 graphite Substances 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 12
- 238000005245 sintering Methods 0.000 claims description 12
- 239000002904 solvent Substances 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 9
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims description 6
- 239000002518 antifoaming agent Substances 0.000 claims description 6
- 238000000498 ball milling Methods 0.000 claims description 6
- 239000011230 binding agent Substances 0.000 claims description 6
- 239000002270 dispersing agent Substances 0.000 claims description 6
- 238000007590 electrostatic spraying Methods 0.000 claims description 6
- 238000011049 filling Methods 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 6
- 238000012216 screening Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 239000002002 slurry Substances 0.000 claims description 6
- 239000003381 stabilizer Substances 0.000 claims description 6
- 239000002562 thickening agent Substances 0.000 claims description 6
- 239000000080 wetting agent Substances 0.000 claims description 6
- 239000008096 xylene Substances 0.000 claims description 6
- NDKWCCLKSWNDBG-UHFFFAOYSA-N zinc;dioxido(dioxo)chromium Chemical compound [Zn+2].[O-][Cr]([O-])(=O)=O NDKWCCLKSWNDBG-UHFFFAOYSA-N 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims 1
- 239000007788 liquid Substances 0.000 abstract description 13
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 abstract description 9
- 229910000611 Zinc aluminium Inorganic materials 0.000 abstract description 9
- 229910045601 alloy Inorganic materials 0.000 abstract description 9
- 239000000956 alloy Substances 0.000 abstract description 9
- HXFVOUUOTHJFPX-UHFFFAOYSA-N alumane;zinc Chemical compound [AlH3].[Zn] HXFVOUUOTHJFPX-UHFFFAOYSA-N 0.000 abstract description 9
- 229910052782 aluminium Inorganic materials 0.000 abstract description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 9
- 229910052725 zinc Inorganic materials 0.000 abstract description 9
- 239000011701 zinc Substances 0.000 abstract description 9
- 230000003647 oxidation Effects 0.000 abstract description 7
- 238000007254 oxidation reaction Methods 0.000 abstract description 7
- 230000035939 shock Effects 0.000 abstract description 5
- 239000002994 raw material Substances 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 description 16
- 238000005469 granulation Methods 0.000 description 4
- 230000003179 granulation Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000010791 quenching Methods 0.000 description 3
- 230000000171 quenching effect Effects 0.000 description 3
- 239000008236 heating water Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 150000001247 metal acetylides Chemical class 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000004584 weight gain Effects 0.000 description 2
- 235000019786 weight gain Nutrition 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004901 spalling Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
- B05D7/16—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies using synthetic lacquers or varnishes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/52—Two layers
- B05D7/54—No clear coat specified
- B05D7/544—No clear coat specified the first layer is let to dry at least partially before applying the second layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/52—Two layers
- B05D7/54—No clear coat specified
- B05D7/546—No clear coat specified each layer being cured, at least partially, separately
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
- C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
- C22C29/067—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds comprising a particular metallic binder
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
- C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
- C22C29/10—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds based on titanium carbide
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/123—Spraying molten metal
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
The invention is suitable for the technical field of metal surface processing, and provides a metal part surface processing technology for improving corrosion resistance, which comprises the steps of spraying a primer on the surface of a substrate by adopting spraying equipment to form a primer layer; melting the corrosion-resistant spraying powder by adopting spraying equipment, and spraying the powder to the surface of the primer layer to form a corrosion-resistant coating coated on the surface of the primer; and the powder comprises a carbide and an elemental metal; the carbide comprises TiC and WC, and also comprises one or two of TaC and NbC, and the metal simple substance comprises Co, Ni and Cr. According to the invention, the primer and the corrosion-resistant coating are used as two layers of coatings and are sequentially coated on the surface of the metal piece, the primer and the corrosion-resistant coating have high corrosion resistance, and metal simple substances Co, Ni and Cr are used as spraying raw materials, so that the surface coating of the metal piece, which has good performances of resisting adhesion of zinc liquid, aluminum liquid and zinc-aluminum alloy melt, metal corrosion, oxidation, thermal shock, high temperature and the like, is prepared.
Description
Technical Field
The invention belongs to the technical field of metal surface machining, and particularly relates to a metal part surface machining process for improving corrosion resistance.
Background
Objects to be placed in a highly corrosive environment must have a corrosion resistant outer surface in order to protect the object. Such a corrosion resistant outer surface may be formed by manufacturing the entire object in a corrosion resistant material. However, this is not a desirable result, for example due to the costs incurred in manufacturing such objects, or due to corrosion resistant materials that may not meet other requirements or properties that the object must meet or have, such as strength, magnetic properties, flexibility, durability, density, weight, thermal or electrical conductivity, machinability, elasticity, fatigue properties, related lubrication properties, hardness, toughness, and the like. Thus, the object is typically coated with a layer of corrosion resistant material to form a corrosion resistant outer surface.
However, the corrosion resistance of the existing corrosion-resistant layer coated on the outer surface of the metal piece is insufficient, the corrosion cannot be effectively resisted, and the service life of the coating is greatly reduced.
Disclosure of Invention
The invention provides a surface processing technology for a metal part with improved corrosion resistance, and aims to solve the problems in the prior art.
The invention is realized in such a way that a metal part surface processing technology for improving corrosion resistance comprises the following steps:
s1, spraying the primer on the surface of the substrate by adopting spraying equipment to form a primer layer;
s2, melting the powder for corrosion-resistant spraying by adopting spraying equipment, and spraying the powder to the surface of the primer layer to form a corrosion-resistant coating coated on the surface of the primer layer;
the powder comprises carbide and metal simple substance; the carbide comprises TiC and WC and also comprises one or two of TaC and NbC, and the metal simple substance comprises Co, Ni and Cr; the carbide accounts for 60-70% of the total weight of the powder, and the balance is a metal simple substance; co accounts for 8-10% of the total weight of the powder, and Cr and Ni account for 22-30% of the total weight of the powder; the TiC accounts for 40-60% of the total weight of the powder; the WC accounts for 8-10% of the total weight of the powder; the balance being TaC and NbC.
Preferably, the primer comprises the following components in percentage by weight: 30-40% of epoxy resin, 10-20% of iron oxide red, 5-8% of zinc yellow, 4-7% of an auxiliary agent, 15-25% of a solvent and 10-15% of a curing agent.
Preferably, the preparation method of the powder comprises the following steps:
a. adding one or two of TaC and NbC into TiC and WC, wherein the grain size of the TiC, the WC, the TaC or the NbC is 1-2 mu m; uniformly mixing, filling into a graphite container, and sealing; putting the graphite container into a vacuum sintering furnace, adjusting the pressure to 20-40 MPa, heating to 1600-1800 ℃ at the speed of 60-70 ℃/min, and preserving the temperature for 2-3 hours to prepare a ceramic block;
b. crushing and ball-milling the ceramic blocks to prepare ceramic particles; the particle size of the ceramic particles is 1-3 mu m;
c. uniformly mixing ceramic particles with Co metal particles, Ni metal particles and Cr metal particles, wherein the particle size of the Co metal particles, the Ni metal particles or the Cr metal particles is 1-5 mu m; adding a binder to prepare slurry; and granulating by a spraying method, sintering, carrying out plasma spheroidization, and screening to obtain the powder.
Preferably, the epoxy resin is a commercially available general-purpose epoxy resin.
Preferably, in step S1, after the primer is sprayed, the primer is dried at a temperature of 25 ℃ or higher for 20-24 hours to form the primer layer.
Preferably, the spraying mode of the primer is brush coating, roll coating, air spraying, airless spraying or electrostatic spraying.
Preferably, the auxiliary agent is a mixture of a dispersing agent, a wetting agent, a defoaming agent, an anti-flash agent, a leveling agent, a stabilizing agent and a thickening agent.
Preferably, the solvent is a mixture of xylene, butanol and cyclohexanone.
Compared with the prior art, the invention has the beneficial effects that: according to the surface processing technology for the metal part with the improved corrosion resistance, the primer and the corrosion-resistant coating are used as two layers of coatings and are sequentially coated on the surface of the metal part, the primer and the corrosion-resistant coating both have high corrosion resistance, the corrosion-resistant coating is made of carbides TiC, WC and one or two of TaC and NbC, and metal simple substances Co, Ni and Cr are used as spraying raw materials, so that the surface coating for the metal part, which has good adhesion of zinc liquid, aluminum liquid and zinc-aluminum alloy melt, metal corrosion resistance, oxidation resistance, thermal shock resistance, high temperature resistance and the like, is prepared.
Drawings
FIG. 1 is a schematic representation of the joining of a metal article, a primer layer and a corrosion-resistant coating of the present invention.
In the figure: 1-metal piece, 2-primer layer and 3-corrosion-resistant coating.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
Referring to fig. 1, the present embodiment provides a technical solution: a surface processing technology for a metal part with improved corrosion resistance comprises the following steps:
and S1, spraying the primer on the surface of the substrate by adopting spraying equipment, and drying for 20-24 hours at the temperature of over 25 ℃ after the primer is sprayed, so as to form the primer layer. The primer comprises the following components in percentage by weight: 35% of epoxy resin, 15% of iron oxide red, 5% of zinc yellow, 5% of auxiliary agent, 25% of solvent and 15% of curing agent. The epoxy resin is a general-purpose epoxy resin sold in the market. The spraying mode of the primer is electrostatic spraying. The auxiliary agent is a mixture of a dispersing agent, a wetting agent, a defoaming agent, an anti-flash agent, a leveling agent, a stabilizing agent and a thickening agent. The solvent is a mixture of xylene, butanol and cyclohexanone.
S2, melting the powder for corrosion-resistant spraying by adopting spraying equipment, and spraying the powder to the surface of the primer layer to form a corrosion-resistant coating coated on the surface of the primer layer;
the powder comprises carbide and metal simple substance; the carbide comprises TiC, WC and NbC, and the metal simple substance comprises Co, Ni and Cr; the carbide accounts for 65 percent of the total weight of the powder, and the balance is metal simple substance; co accounts for 10% of the total weight of the powder, and Cr and Ni account for 25% of the total weight of the powder; TiC accounts for 55% of the total weight of the powder; WC accounts for 8% of the total weight of the powder; the balance being NbC.
The preparation method of the powder comprises the following steps:
a. adding one or two of TaC and NbC into TiC and WC, wherein the grain size of the TiC, the WC, the TaC or the NbC is 1-2 mu m; uniformly mixing, filling into a graphite container, and sealing; putting the graphite container into a vacuum sintering furnace, adjusting the pressure to 20-40 MPa, heating to 1600-1800 ℃ at the speed of 60-70 ℃/min, and preserving the temperature for 2-3 hours to prepare a ceramic block;
b. crushing and ball-milling the ceramic blocks to prepare ceramic particles; the particle size of the ceramic particles is 1-3 mu m;
c. uniformly mixing ceramic particles with Co metal particles, Ni metal particles and Cr metal particles, wherein the particle size of the Co metal particles, the Ni metal particles or the Cr metal particles is 1-5 mu m; adding a binder to prepare slurry; after granulation by a spraying method, powder is obtained by sintering, plasma spheroidization and screening.
Example 2
Referring to fig. 1, the present embodiment provides a technical solution: a surface processing technology for a metal part with improved corrosion resistance comprises the following steps:
and S1, spraying the primer on the surface of the substrate by adopting spraying equipment, and drying for 20-24 hours at the temperature of over 25 ℃ after the primer is sprayed, so as to form the primer layer. The primer comprises the following components in percentage by weight: 35% of epoxy resin, 15% of iron oxide red, 5% of zinc yellow, 5% of auxiliary agent, 25% of solvent and 15% of curing agent. The epoxy resin is a general-purpose epoxy resin sold in the market. The spraying mode of the primer is electrostatic spraying. The auxiliary agent is a mixture of a dispersing agent, a wetting agent, a defoaming agent, an anti-flash agent, a leveling agent, a stabilizing agent and a thickening agent. The solvent is a mixture of xylene, butanol and cyclohexanone.
S2, melting the powder for corrosion-resistant spraying by adopting spraying equipment, and spraying the powder to the surface of the primer layer to form a corrosion-resistant coating coated on the surface of the primer layer;
the powder comprises carbide and metal simple substance; the carbide comprises TiC, WC and TaC, and the metal simple substance comprises Co, Ni and Cr; the carbide accounts for 60 percent of the total weight of the powder, and the balance is metal simple substance; co accounts for 10% of the total weight of the powder, and Cr and Ni account for 30% of the total weight of the powder; TiC accounts for 45% of the total weight of the powder; WC accounts for 8% of the total weight of the powder; the rest is TaC.
The preparation method of the powder comprises the following steps:
a. adding one or two of TaC and NbC into TiC and WC, wherein the grain size of the TiC, the WC, the TaC or the NbC is 1-2 mu m; uniformly mixing, filling into a graphite container, and sealing; putting the graphite container into a vacuum sintering furnace, adjusting the pressure to 20-40 MPa, heating to 1600-1800 ℃ at the speed of 60-70 ℃/min, and preserving the temperature for 2-3 hours to prepare a ceramic block;
b. crushing and ball-milling the ceramic blocks to prepare ceramic particles; the particle size of the ceramic particles is 1-3 mu m;
c. uniformly mixing ceramic particles with Co metal particles, Ni metal particles and Cr metal particles, wherein the particle size of the Co metal particles, the Ni metal particles or the Cr metal particles is 1-5 mu m; adding a binder to prepare slurry; after granulation by a spraying method, powder is obtained by sintering, plasma spheroidization and screening.
Example 3
Referring to fig. 1, the present embodiment provides a technical solution: a surface processing technology for a metal part with improved corrosion resistance comprises the following steps:
and S1, spraying the primer on the surface of the substrate by adopting spraying equipment, and drying for 20-24 hours at the temperature of over 25 ℃ after the primer is sprayed, so as to form the primer layer. The primer comprises the following components in percentage by weight: 35% of epoxy resin, 15% of iron oxide red, 5% of zinc yellow, 5% of auxiliary agent, 25% of solvent and 15% of curing agent. The epoxy resin is a general-purpose epoxy resin sold in the market. The spraying mode of the primer is electrostatic spraying. The auxiliary agent is a mixture of a dispersing agent, a wetting agent, a defoaming agent, an anti-flash agent, a leveling agent, a stabilizing agent and a thickening agent. The solvent is a mixture of xylene, butanol and cyclohexanone.
S2, melting the powder for corrosion-resistant spraying by adopting spraying equipment, and spraying the powder to the surface of the primer layer to form a corrosion-resistant coating coated on the surface of the primer layer;
the powder comprises carbide and metal simple substance; the carbide comprises TiC and WC, and also comprises TaC and NbC, and the metal simple substance comprises Co, Ni and Cr; the carbide accounts for 64 percent of the total weight of the powder, and the balance is metal simple substance; co accounts for 10% of the total weight of the powder, and Cr and Ni account for 26% of the total weight of the powder; TiC accounts for 44% of the total weight of the powder; WC accounts for 9% of the total weight of the powder; the balance being TaC and NbC.
The preparation method of the powder comprises the following steps:
a. adding one or two of TaC and NbC into TiC and WC, wherein the grain size of the TiC, the WC, the TaC or the NbC is 1-2 mu m; uniformly mixing, filling into a graphite container, and sealing; putting the graphite container into a vacuum sintering furnace, adjusting the pressure to 20-40 MPa, heating to 1600-1800 ℃ at the speed of 60-70 ℃/min, and preserving the temperature for 2-3 hours to prepare a ceramic block;
b. crushing and ball-milling the ceramic blocks to prepare ceramic particles; the particle size of the ceramic particles is 1-3 mu m;
c. uniformly mixing ceramic particles with Co metal particles, Ni metal particles and Cr metal particles, wherein the particle size of the Co metal particles, the Ni metal particles or the Cr metal particles is 1-5 mu m; adding a binder to prepare slurry; after granulation by a spraying method, powder is obtained by sintering, plasma spheroidization and screening.
Example 4
Referring to fig. 1, the present embodiment provides a technical solution: a surface processing technology for a metal part with improved corrosion resistance comprises the following steps:
and S1, spraying the primer on the surface of the substrate by adopting spraying equipment, and drying for 20-24 hours at the temperature of over 25 ℃ after the primer is sprayed, so as to form the primer layer. The primer comprises the following components in percentage by weight: 35% of epoxy resin, 15% of iron oxide red, 5% of zinc yellow, 5% of auxiliary agent, 25% of solvent and 15% of curing agent. The epoxy resin is a general-purpose epoxy resin sold in the market. The spraying mode of the primer is electrostatic spraying. The auxiliary agent is a mixture of a dispersing agent, a wetting agent, a defoaming agent, an anti-flash agent, a leveling agent, a stabilizing agent and a thickening agent. The solvent is a mixture of xylene, butanol and cyclohexanone.
S2, melting the powder for corrosion-resistant spraying by adopting spraying equipment, and spraying the powder to the surface of the primer layer to form a corrosion-resistant coating coated on the surface of the primer layer;
the powder comprises carbide and metal simple substance; the carbide comprises TiC and WC, and also comprises TaC and NbC, and the metal simple substance comprises Co, Ni and Cr; the carbide accounts for 68 percent of the total weight of the powder, and the balance is metal simple substance; co accounts for 8% of the total weight of the powder, and Cr and Ni account for 24% of the total weight of the powder; TiC accounts for 42% of the total weight of the powder; WC accounts for 8% of the total weight of the powder; the balance being TaC and NbC.
The preparation method of the powder comprises the following steps:
a. adding one or two of TaC and NbC into TiC and WC, wherein the grain size of the TiC, the WC, the TaC or the NbC is 1-2 mu m; uniformly mixing, filling into a graphite container, and sealing; putting the graphite container into a vacuum sintering furnace, adjusting the pressure to 20-40 MPa, heating to 1600-1800 ℃ at the speed of 60-70 ℃/min, and preserving the temperature for 2-3 hours to prepare a ceramic block;
b. crushing and ball-milling the ceramic blocks to prepare ceramic particles; the particle size of the ceramic particles is 1-3 mu m;
c. uniformly mixing ceramic particles with Co metal particles, Ni metal particles and Cr metal particles, wherein the particle size of the Co metal particles, the Ni metal particles or the Cr metal particles is 1-5 mu m; adding a binder to prepare slurry; after granulation by a spraying method, powder is obtained by sintering, plasma spheroidization and screening.
The technical parameters of the metal parts in the examples are shown in the following table:
the data in the table were obtained as follows:
oxidation weight gain: and (3) putting the test block with the four sides coated with the corrosion-resistant coatings into a heat treatment furnace, heating to 800 ℃, preserving heat for 24h, taking out, cooling, weighing, and calculating the weight gain of the coating per unit area in unit time for measuring the oxidation resistance of the coating.
Aluminum liquid corrosion resistance: and taking a plurality of test rods wrapped with the corrosion-resistant coatings, dividing the test rods into two groups, immersing one group of test rods into high-temperature molten aluminum at 850 ℃, taking out the test rods after stirring for 320 hours, stripping the aluminum film from the test rods, and observing the shedding condition of the coatings. The smaller the falling area of the coating on the surface of the test rod is, the stronger the aluminum liquid corrosion resistance of the coating is. The aluminum liquid corrosion resistance of the coating is divided into excellent, good, common and poor from high to low. After the aluminum film is stripped, the weight of the coating in unit area of unit time is less, the oxidation resistance is stronger, and the oxidation resistance is weaker.
Zinc liquid corrosion resistance: several test rods coated with corrosion-resistant coatings are immersed into the high-temperature zinc liquid at 850 ℃ in a whole, stirred for 320 hours and then taken out. The zinc film was then peeled from the test bar and the peeling of the coating was observed. The smaller the area of the coating on the surface of the test rod falling off, the stronger the zinc liquid corrosion resistance of the coating. The zinc liquid corrosion resistance of the coating is divided into excellent, good, common and poor from high to low. After the zinc film is stripped, the coating does not fall off.
And the corrosion resistance of the zinc-aluminum alloy melt: and (3) taking a plurality of test rods coated with the corrosion-resistant coating, immersing the whole test rods into the 850 ℃ high-temperature zinc-aluminum alloy melt, stirring for 320 hours, and taking out. And peeling the zinc-aluminum alloy film from the test rod, and observing the peeling condition of the coating. The smaller the falling area of the coating on the surface of the test rod is, the stronger the corrosion resistance of the coating to the zinc-aluminum alloy melt is. The corrosion resistance of the coating to the zinc-aluminum alloy melt is divided into excellent, good, common and poor from high to low. After the zinc-aluminum alloy film is stripped, the coating does not fall off.
Heating the coated test piece to 900 ℃, preserving the heat for 20min, taking out the test piece, performing water quenching treatment, and observing the peeling condition of the coating. The heating water quenching is repeated until the spalling area of the coating exceeds 2 percent of the total area of the coating. The thermal shock performance of the coating was measured by the number of heat water quenches that resulted in the spalled area of the coating exceeding 2% of the total area of the coating. The more the heating water quenching times, the better the thermal shock performance, and vice versa.
According to the surface processing technology for the metal part with the improved corrosion resistance, the primer and the corrosion-resistant coating are used as two layers of coatings and are sequentially coated on the surface of the metal part, the primer and the corrosion-resistant coating both have high corrosion resistance, the corrosion-resistant coating is made of carbides TiC, WC and one or two of TaC and NbC, and metal simple substances Co, Ni and Cr are used as spraying raw materials, so that the surface coating for the metal part, which has good adhesion of zinc liquid, aluminum liquid and zinc-aluminum alloy melt, metal corrosion resistance, oxidation resistance, thermal shock resistance, high temperature resistance and the like, is prepared.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. A surface processing technology for a metal part for improving corrosion resistance is characterized by comprising the following steps: the method comprises the following steps:
s1, spraying the primer on the surface of the substrate by adopting spraying equipment to form a primer layer;
s2, melting the powder for corrosion-resistant spraying by adopting spraying equipment, and spraying the powder to the surface of the primer layer to form a corrosion-resistant coating coated on the surface of the primer layer;
the powder comprises carbide and metal simple substance; the carbide comprises TiC and WC and also comprises one or two of TaC and NbC, and the metal simple substance comprises Co, Ni and Cr; the carbide accounts for 60-70% of the total weight of the powder, and the balance is a metal simple substance; co accounts for 8-10% of the total weight of the powder, and Cr and Ni account for 22-30% of the total weight of the powder; the TiC accounts for 40-60% of the total weight of the powder; the WC accounts for 8-10% of the total weight of the powder; the balance being TaC and NbC.
2. The surface machining process for the metal part with the improved corrosion resistance as recited in claim 1, wherein the machining process comprises the following steps: the primer comprises the following components in percentage by weight: 30-40% of epoxy resin, 10-20% of iron oxide red, 5-8% of zinc yellow, 4-7% of an auxiliary agent, 15-25% of a solvent and 10-15% of a curing agent.
3. The surface machining process for the metal part with the improved corrosion resistance as recited in claim 1, wherein the machining process comprises the following steps: the preparation method of the powder comprises the following steps:
a. adding one or two of TaC and NbC into TiC and WC, wherein the grain size of the TiC, the WC, the TaC or the NbC is 1-2 mu m; uniformly mixing, filling into a graphite container, and sealing; putting the graphite container into a vacuum sintering furnace, adjusting the pressure to 20-40 MPa, heating to 1600-1800 ℃ at the speed of 60-70 ℃/min, and preserving the temperature for 2-3 hours to prepare a ceramic block;
b. crushing and ball-milling the ceramic blocks to prepare ceramic particles; the particle size of the ceramic particles is 1-3 mu m;
c. uniformly mixing ceramic particles with Co metal particles, Ni metal particles and Cr metal particles, wherein the particle size of the Co metal particles, the Ni metal particles or the Cr metal particles is 1-5 mu m; adding a binder to prepare slurry; and granulating by a spraying method, sintering, carrying out plasma spheroidization, and screening to obtain the powder.
4. The surface machining process for the metal part with the improved corrosion resistance as recited in claim 2, wherein the machining process comprises the following steps: the epoxy resin is a commercially available general-purpose epoxy resin.
5. The surface machining process for the metal part with the improved corrosion resistance as recited in claim 2, wherein the machining process comprises the following steps: in the step S1, after the primer is sprayed, drying the primer for 20-24 hours at the temperature of more than 25 ℃ to form the primer layer.
6. The surface machining process for the metal part with the improved corrosion resistance as recited in claim 1, wherein the machining process comprises the following steps: the spraying mode of the primer is brush coating, roll coating, air spraying, airless spraying or electrostatic spraying.
7. The surface machining process for the metal part with the improved corrosion resistance as recited in claim 2, wherein the machining process comprises the following steps: the auxiliary agent is a mixture of a dispersing agent, a wetting agent, a defoaming agent, an anti-flash agent, a leveling agent, a stabilizing agent and a thickening agent.
8. The surface machining process for the metal part with the improved corrosion resistance as recited in claim 2, wherein the machining process comprises the following steps: the solvent is a mixture of xylene, butanol and cyclohexanone.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN119910964A (en) * | 2025-04-02 | 2025-05-02 | 上海舜锋机械制造有限公司 | A high-toughness carbon steel composite plate and its preparation process |
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