CN111394681A - Anti-erosion graphene composite gradient coating on outer cylinder surface of MWD (measurement while drilling) instrument - Google Patents

Anti-erosion graphene composite gradient coating on outer cylinder surface of MWD (measurement while drilling) instrument Download PDF

Info

Publication number
CN111394681A
CN111394681A CN202010330727.1A CN202010330727A CN111394681A CN 111394681 A CN111394681 A CN 111394681A CN 202010330727 A CN202010330727 A CN 202010330727A CN 111394681 A CN111394681 A CN 111394681A
Authority
CN
China
Prior art keywords
powder
layer
coating
erosion
spraying
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010330727.1A
Other languages
Chinese (zh)
Inventor
张权
杨国杰
魏坤霞
黄文军
魏伟
李敏
崔海文
杜庆柏
刘平
赵晓兵
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sinopec Oilfield Service Corp
Sinopec East China Petroleum Engineering Corp
Original Assignee
Sinopec Oilfield Service Corp
Sinopec East China Petroleum Engineering Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sinopec Oilfield Service Corp, Sinopec East China Petroleum Engineering Corp filed Critical Sinopec Oilfield Service Corp
Priority to CN202010330727.1A priority Critical patent/CN111394681A/en
Publication of CN111394681A publication Critical patent/CN111394681A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • 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
    • C23C4/10—Oxides, borides, carbides, nitrides or silicides; Mixtures thereof
    • 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
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
    • C23C28/32—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer
    • C23C28/321—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer with at least one metal alloy layer
    • C23C28/3215—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer with at least one metal alloy layer at least one MCrAlX layer
    • 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
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
    • C23C28/34—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates
    • 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
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
    • C23C28/36—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including layers graded in composition or physical properties
    • 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
    • C23C4/04—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
    • C23C4/073—Metallic material containing MCrAl or MCrAlY alloys, where M is nickel, cobalt or iron, with or without non-metal elements
    • 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
    • C23C4/134—Plasma spraying

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Inorganic Chemistry (AREA)
  • Coating By Spraying Or Casting (AREA)

Abstract

The invention belongs to the technical field of coatings, and particularly relates to an erosion-resistant graphene composite gradient coating on the surface of an outer cylinder of a Measurement While Drilling (MWD) instrument. The coating consists of a priming layer, a transition layer and a working layer; spraying NiCrAlY composite powder on the priming coat; working layer spraying Al2O3TiO 2 nanoparticles2、TiB2、Cr3A mixed powder composed of Si and a plurality of graphene sheets; the transition layer is sprayed with mixed powder of NiCrAlY composite powder and the same component as the working layer powder. The invention designs a coating structure with gradient element components, which enables the structure and the performance of the coating to gradually change in a gradient way, reduces the internal stress between the coating and the outer cylinder of an MWD instrument, and improves the internal stressThe erosion resistance of the coating is improved. The base coat can improve the bonding strength of the coating and the outer cylinder of the MWD instrument; the multilayer graphene sheets are added into the gradient coating material, so that the strength, hardness and erosion resistance of the coating can be better improved.

Description

Anti-erosion graphene composite gradient coating on outer cylinder surface of MWD (measurement while drilling) instrument
Technical Field
The invention belongs to the technical field of coatings, and particularly relates to an erosion-resistant graphene composite gradient coating on the surface of an outer cylinder of an MWD (measurement while drilling) instrument.
Background
Measurement While Drilling (MWD) is a technology for downhole Measurement and wireless transmission during Drilling, which uses mud pulses in a drill string to transmit measured formation data to a logging ground system in a wireless transmission manner in time, and the ground system processes the formation data into corresponding formation physical information through a corresponding algorithm to guide real-time Drilling operation and later-stage oil and gas development. Along with the continuous deepening of oil exploration and development, stratum structures are more and more complex, the requirements on the track control quality and the speed-up and efficiency-improvement of a well are higher and higher, and the MWD is used for directional construction of inclined shaft sections and also used for vertical shaft construction. However, due to the extremely bad working condition of the construction well in the drilling process, the drilling fluid erodes the outer cylinder of the MWD instrument and sand grains abrades the outer cylinder, so that the outer cylinder is easy to puncture and leak, the instrument is scrapped, and the drilling operation period and the production efficiency are seriously influenced.
Copper and its alloy have been widely used in industrial production because of their excellent thermal and electrical conductivity and good plasticity, but copper and its alloy have low surface hardness and poor wear resistance, which limits their application in special occasions. The outer cylinder of the MWD instrument is usually made of beryllium bronze.
The theoretical thickness of the single-layer graphene is 0.35nm, and the single-layer graphene is the material with the smallest thickness in two-dimensional structure materials found in the field of materials at present; the theoretical value of the specific surface area reaches 2630m2(ii) in terms of/g. The special two-dimensional structure of the graphene enables the graphene to have distinctive mechanical properties, electrical properties, optical properties, tribological properties and the like. For example: the resistivity of graphene is only 10-6Omega/cm, breaking strength up to 130GPa and Young modulus of 1.1 TPa.
Disclosure of Invention
In order to reduce the erosion wear of the drilling fluid to the outer cylinder of the MWD instrument, the invention provides the design and preparation of the graphene composite gradient coating on the surface of the outer cylinder (beryllium bronze) of the MWD instrument, so that the high-frequency instrument fault caused by the erosion wear of the drilling fluid can be effectively reduced, and the method has important significance for improving the technical level of MWD instruments and equipment in China.
The invention provides an erosion-resistant graphene composite gradient coating on the surface of an outer cylinder of an MWD (measurement while drilling) instrument by combining the advantages of a plurality of graphene sheets (less than 8 layers), a ceramic material and a gradient structure.
The technical scheme of the invention is as follows:
an anti-erosion graphene composite gradient coating on the surface of an outer cylinder of an MWD instrument consists of a priming layer, a transition layer and a working layer;
the priming layer is a metal layer and is formed by spraying NiCrAlY composite powder, the average particle size of the NiCrAlY composite powder in the priming layer is 38-75 mu m, the content of Cr is 18-24 wt%, the content of Al is 7-13 wt%, the content of Y is 0.5-1.0 wt%, and the balance is Ni.
The components of the NiCrAlY alloy selected by the invention have decisive effects on the growth speed, the components and the integrity of a thermal oxidation layer of the bonding layer in the thermal cycle process, the bonding force with a matrix and the peeling behavior. The NiCrAlY coating not only has good high-temperature oxidation resistance and hot corrosion resistance, but also has good toughness and fatigue resistance, and the components of the coating are not limited by base alloy. The solid solubility of Y is very small, about 0.01-0.04 wt% in Ni, and Ni-Y type intermetallic compounds are precipitated when the solid solubility of Y exceeds the limit, and the compounds can improve the forming capability and the caking property of a protective oxide film on the surface of a coating.
The working layer is a ceramic layer mainly made of Al2O3Powder, nano TiO2Powder, TiB2Powder of Cr3Spraying mixed powder consisting of Si powder; al (Al)2O3Powder, nano TiO2Powder, TiB2Powder and Cr3The mass ratio of the Si powder is 75-90: 3-15: 2-5: 2-5; al (Al)2O3The particle size of the powder is 23-45 mu m; nano TiO 22The particle size of the powder is 50-100 nm; TiB2The particle size of the powder is 26-53 mu m; cr (chromium) component3The grain size of the Si powder is 26-53 mu m; adding a small amount of multilayer graphene sheets (less than 8 layers) into the mixed powder of the working layer, wherein the content of the multilayer graphene sheets accounts for 0.25-1.5 wt% of the total mass of the mixed powder of the working layer; the wear resistance and corrosion resistance of the coating are better improved;
the working layer material of the invention is Al2O3Powder, nano TiO2Powder, TiB2Powder of Cr3Si powder and multilayer graphene sheet, TiB2Coefficient of thermal expansion of 8.64 × 10-6K, and Al2O3Powder, TiO2The powder has small thermal expansion coefficient difference, small coating internal stress and TiB2High hardness of powder, strong acid corrosion resistance and strong high-temperature oxidation resistance. Cr at ordinary temperature3The Si powder is hard and brittle, has certain plasticity at high temperature, and the surface forms compact and non-porous SiO at high temperature2The film has high chemical stability, acid resistance and self-pore-sealing effect. TiB2Powder of Cr3The addition amount of the Si powder and the graphene sheet is small, but the hardness, the wear resistance and the erosion resistance can be better improved, and the cost is relatively low. The working layer is arranged above the three transition layers, the content of the material of the priming layer is gradually reduced from the transition layer to the working layer, the content of the ceramic material and the content of the multilayer graphene sheet (less than 8 layers) are gradually increased, and the components in the whole gradient structure are mutually synergistic to obtain the coatingThe layer properties are excellent.
The transition layer is a metal-ceramic layer and is formed by spraying NiCrAlY composite powder and mixed powder with the same components as the working layer powder; the transition layer has three layers, the mass ratio of NiCrAlY composite powder to mixed powder with the same components as the working layer powder is (2-4): 1, (0.5-1.5): 2-4) respectively from the priming layer to the working layer.
According to the invention, from the transition layer to the working layer, the content of the material of the priming layer is gradually reduced, and the content of the ceramic material and the content of the multilayer graphene sheets are gradually increased. According to the physical performance parameters, the component gradient transition can greatly relieve the cracking problem of the coating caused by the mismatch of the thermal expansion coefficients, so that obvious component mutation and a macroscopic layer interface generated by the component mutation do not exist among the components in the coating. The coating has high bonding strength between the coating and the substrate or between the coating and the coating, so that the performances of wear resistance, erosion resistance and the like of the gradient coating are greatly improved.
Adding nano TiO into the working layer2The powder and the multilayer graphene sheets enable the working layer to be more compact, and the defects such as cracks, gaps and the like are obviously reduced; the addition of multiple graphene sheets (less than 8 layers) can also reduce the coefficient of friction of the working layer.
The thicknesses of the bottom layer, the transition layer and the working layer are respectively 30-50 microns, 150-200 microns and 100-120 microns.
The outer cylinder of the MWD instrument is made of beryllium bronze and is marked with QBe 2.
The microhardness of the obtained gradient coating is 800-1050 HV, the roughness is 6.03-8.19 mu m, the bonding strength of the coating is 25-36 MPa, and the erosive wear rate is 0.0472-0.0864 mg-cm-2·min-1。
The preparation method of the gradient composite coating comprises the following steps:
(1) carrying out ultrasonic cleaning, drying and roughening treatment on the surface of the MWD outer cylinder;
(2) preheating the substrate treated in the step (1) by using plasma spray gun flame at 180-200 ℃; then spraying a NiCrAlY priming coat, wherein the spraying power is as follows: 26-30 kW; and respectively spraying three transition layers, wherein the spraying power is as follows: 30-35 kW; and finally, spraying a working layer, wherein the spraying power is as follows: 32-38 kW.
(3) And carrying out laser cladding on the surface of the sample subjected to the plasma spraying.
The invention has the beneficial effects that:
(1) the strength, hardness and erosion resistance of the coating can be better improved by adding a plurality of graphene sheets (less than 8 layers) into the ceramic coating material.
(2) The invention uses the priming layer and the gradient layer as the inner coating, can effectively reduce the defects of cracks, air holes, falling off and the like of the working layer under the high-temperature condition, and then carries out cladding on the surface of the working layer, so that the coating is more compact, and the oxidation resistance and the erosion resistance are improved.
(3) The erosion-resistant graphene composite gradient coating prepared by the invention has the advantages of improved performance without influencing the original size, lower cost, simple process and easy realization.
Drawings
FIG. 1 is a schematic structural diagram of a gradient composite coating.
Detailed Description
The present invention is further described below with reference to examples, but is not limited thereto.
Example 1
An anti-erosion graphene composite gradient coating for the surface of an outer cylinder of an MWD instrument is composed of a priming layer, a transition layer and a working layer; spraying NiCrAlY composite powder on the priming layer, wherein the mass ratio of Cr: 20 wt%, Al: 9 wt%, Y: 0.5 wt%, the balance being Ni, the thickness being 30 μm, the spraying power being 30 kW; the transition layer is sprayed with NiCrAlY composite powder and Al2O3+3 wt% of nano TiO2+2wt％TiB2Powder +2 wt% Cr3Forming a composite powder of Si powder and a plurality of graphene sheets; NiCrAlY composite powder and Al in each transition layer from the priming coat to the working coat2O3+3 wt% of nano TiO2+2wt％TiB2Powder +2 wt% Cr3The mass ratio of the mixed powder of Si powder and 0.25 wt% of multilayer graphene sheets is 2:1, 1:1 and 1:2 respectively, the thickness of the transition layer is 60 mu m × 3, the spraying power is 35 kW., and the working layer is sprayed with Al2O3Powder, nano TiO2Powder, TiB2Powder of Cr3A mixed powder composed of Si powder and a plurality of graphene sheets; wherein, the nanometer TiO2Is 3 wt% of TiB2The content of the powder was 2 wt%, Cr3The content of Si powder was 2 wt%, and the content of multilayer graphene sheets (less than 8 layers) was 0.25 wt%; the thickness of the working layer is 100 μm, and the spraying power is 38 kW; performance results measured under these conditions: roughness of 8.19 μm, microhardness of 800HV, bonding strength of 25MPa, erosion wear rate of 0.0864mg cm-2·min-1。
Example 2
An anti-erosion graphene composite gradient coating for the surface of an outer cylinder of an MWD instrument is composed of a priming layer, a transition layer and a working layer; spraying NiCrAlY composite powder on the priming layer, wherein the mass ratio of Cr: 20 wt%, Al: 9 wt%, Y: 0.5 wt% and the balance of Ni, the thickness is 30 μm, and the spraying power is 26 kW; the transition layer is sprayed with NiCrAlY composite powder and Al2O3+10 wt% of nano TiO2+3wt％TiB2Powder +3 wt% Cr3Forming a composite powder of Si powder and 0.5 wt% of multilayer graphene sheets; NiCrAlY composite powder and Al in each transition layer from the priming coat to the working coat2O3+10 wt% of nano TiO2+3wt％TiB2Powder +3 wt% Cr3The mass ratio of the mixed powder of Si powder and 0.5 wt% of multilayer graphene sheets is 4:1, 1:1 and 1:4 respectively, the thickness of the transition layer is 60 mu m × 3, the spraying power is 30 kW., and the working layer is sprayed with Al2O3Powder, nano TiO2Powder, TiB2Powder of Cr3A mixed powder composed of Si powder and a plurality of graphene sheets; wherein, the nanometer TiO2Is 10 wt%, TiB2The content of the powder was 3 wt%, Cr3The content of Si powder was 3 wt%, and the content of multilayer graphene sheets (less than 8 layers) was 0.5 wt%; the thickness of the working layer is 100 μm, and the spraying power is 32 kW; performance results measured under these conditions: roughness of 7.24 μm, microhardness of 962HV, bonding strength of 31.5MPa, erosion wear rate of 0.0647mg cm-2·min-1。
Example 3
An anti-erosion graphene composite gradient coating for the surface of an outer cylinder of an MWD instrument is composed of a priming layer, a transition layer and a working layer; spraying NiCrAlY composite powder on the priming layer, wherein the mass ratio of Cr: 20 wt%, Al: 9 wt%, Y: 0.5 wt% and the balance of Ni, the thickness is 30 μm, and the spraying power is 28 kW; the transition layer is sprayed with NiCrAlY composite powder and Al2O3+15 wt% of nano TiO2+5wt％TiB2Powder +5 wt% Cr3Forming a composite powder of Si +1.5 wt% multilayer graphene sheet powder; NiCrAlY composite powder and Al in each transition layer from the priming coat to the working coat2O3+15 wt% of nano TiO2+5wt％TiB2Powder +5 wt% Cr3The mass ratio of the mixed powder of Si powder and 1.5 wt% of multilayer graphene sheets is 3:1, 1:1 and 1:3 respectively, the thickness of the transition layer is 60 mu m × 3, the spraying power is 32 kW., and the working layer is sprayed with Al2O3Powder, nano TiO2Powder, TiB2Powder of Cr3A mixed powder composed of Si powder and a plurality of graphene sheets; wherein, the nanometer TiO2Is 15 wt%, TiB2The content of the powder was 5 wt%, Cr3The content of Si powder was 5 wt%, and the content of multilayer graphene sheets (less than 8 layers) was 1.5 wt%; the thickness of the working layer is 100 μm, and the spraying power is 35 kW; performance results measured under these conditions: roughness of 6.03 μm, microhardness of 1050HV, bonding strength of 36MPa, erosion wear rate of 0.0472mg cm-2·min-1。
Comparative example 1
An anti-erosion graphene composite double-layer coating for the surface of an outer cylinder of an MWD instrument is composed of a priming coat and a working coat; spraying NiCrAlY composite powder on the priming layer, wherein the mass ratio of Cr: 20 wt%, Al: 9 wt%, Y: 0.5 wt%, the balance being Ni, the thickness being 30 μm, the spraying power being 30 kW; the working layer is sprayed with Al2O3Powder, nano TiO2Powder, TiB2Powder of Cr3A mixed powder composed of Si powder and a plurality of graphene sheets; wherein, the nanometer TiO2Is 3 wt% of TiB2The content of the powder was 2 wt%, Cr3The content of Si powder was 2 wt%, and the content of multilayer graphene sheets (less than 8 layers) was 0.25 wt%; the thickness of the working layer is 100 μm, and the spraying power is 38 kW; performance results measured under these conditions: roughness of 8.07 μm, microhardness of 812HV, bonding strength of 22MPa, erosion wear rate of 0.0924mg cm-2·min-1。
Comparative example 2
An anti-erosion graphene composite gradient coating for the surface of an outer cylinder of an MWD instrument is composed of a priming layer, a transition layer and a working layer; spraying NiCrAlY composite powder on the priming layer, wherein the mass ratio of Cr: 20 wt%, Al: 9 wt%, Y: 0.5 wt% and the balance of Ni, the thickness is 30 μm, and the spraying power is 26 kW; the transition layer is sprayed with NiCrAlY composite powder and Al2O3+10 wt% of nano TiO2+3wt％TiB2Powder +3 wt% Cr3Forming a composite powder of Si powder and 0.5 wt% of multilayer graphene sheets; NiCrAlY composite powder and Al2O3+10 wt% of nano TiO2+3wt％TiB2Powder +3 wt% Cr3The mass ratio of the mixed powder of the Si powder and 0.5 wt% of the multilayer graphene sheet is 1:1, the thickness of the transition layer is 60 μm, and the spraying power is 30 kW. The working layer is sprayed with Al2O3Powder, nano TiO2Powder, TiB2Powder of Cr3A mixed powder composed of Si powder and a plurality of graphene sheets; wherein, the nanometer TiO2Is 10 wt%, TiB2The content of the powder was 3 wt%, Cr3The content of Si powder was 3 wt%, and the content of multilayer graphene sheets (less than 8 layers) was 0.5 wt%; the thickness of the working layer is 100 μm, and the spraying power is 32 kW; performance results measured under these conditions: roughness of 7.08 μm, microhardness of 950HV, bonding strength of 28MPa, erosion wear rate of 0.0683mg cm-2·min-1。
Comparative example 3
An anti-erosion graphene composite gradient coating for the surface of an outer cylinder of an MWD instrument is composed of a priming layer, a transition layer and a working layer; spraying NiCrAlY composite powder on the priming layer, wherein the mass ratio of Cr: 20 wt%, Al: 9 wt%, Y: 0.5 wt%, the balance being Ni, the thickness being 30 μm, and the spraying power is 28 kW; the transition layer is sprayed with NiCrAlY composite powder and Al2O3+15 wt% of nano TiO2+5wt％TiB2Powder +5 wt% Cr3Forming a composite powder of Si powder +1.5 wt% of multilayer graphene sheets; NiCrAlY composite powder and Al2O3+15 wt% of nano TiO2+5wt％TiB2Powder +5 wt% Cr3The mass ratio of the mixed powder of the Si powder and the 1.5 wt% multilayer graphene sheet is 1:1, the thickness of the transition layer is 180 μm, and the spraying power is 32 kW. The working layer is sprayed with Al2O3Powder, nano TiO2Powder, TiB2Powder of Cr3A mixed powder composed of Si powder and a plurality of graphene sheets; wherein, the nanometer TiO2Is 15 wt%, TiB2The content of the powder was 5 wt%, Cr3The content of Si powder was 5 wt%, and the content of multilayer graphene sheets (less than 8 layers) was 1.5 wt%; the thickness of the working layer is 100 μm, and the spraying power is 35 kW; performance results measured under these conditions: roughness of 6.17 μm, microhardness of 989HV, bonding strength of 31MPa, erosion wear rate of 0.0496mg cm-2·min-1。
Comparative example 4
An anti-erosion graphene composite gradient coating for the surface of an outer cylinder of an MWD instrument is composed of a priming layer, a transition layer and a working layer; spraying NiCrAlY composite powder on the priming layer, wherein the mass ratio of Cr: 20 wt%, Al: 9 wt%, Y: 0.5 wt% and the balance of Ni, the thickness is 30 μm, and the spraying power is 28 kW; the transition layer is sprayed with NiCrAlY composite powder and Al2O3+15 wt% of nano TiO2+5wt％Cr3Forming a composite powder of Si powder +1.5 wt% of multilayer graphene sheets; NiCrAlY composite powder and Al2O3+15 wt% of nano TiO2+5wt％Cr3The mass ratio of the mixed powder of Si powder and 1.5 wt% of multilayer graphene sheets is 3:1, 1:1 and 1:3, the thickness of the transition layer is 60 mu m × 3, and the spraying power is 32 kW.2O3Powder, nano TiO2Powder of Cr3A mixed powder composed of Si powder and a plurality of graphene sheets; wherein, the nanometer TiO2The content of (B) is 15 wt%,Cr3the content of Si powder was 5 wt%, and the content of multilayer graphene sheets (less than 8 layers) was 1.5 wt%; the thickness of the working layer is 100 μm, and the spraying power is 35 kW; performance results measured under these conditions: the roughness is 6.23 μm, the microhardness is 936HV, the bonding strength is 34MPa, and the erosive wear rate is 0.0565mg cm-2·min-1。
The present invention is not limited to the above-described embodiments, and any obvious improvements, substitutions or modifications can be made by those skilled in the art without departing from the spirit of the present invention.

Claims (10)

1. The graphene composite gradient coating is characterized by consisting of a bottom layer, a transition layer and a working layer, wherein the transition layer is divided into a first transition layer, a second transition layer and a third transition layer.
2. The erosion resistant graphene composite gradient coating of claim 1, wherein the primer layer is a metallic layer formed by spraying NiCrAlY composite powder; the working layer is a ceramic layer made of Al2O3Powder, nano TiO2Powder, TiB2Powder of Cr3Spraying mixed powder consisting of Si powder and a plurality of graphene sheets; the transition layer is a metal-ceramic layer and is made of NiCrAlY composite powder and Al2O3Powder, nano TiO2Powder, TiB2Powder of Cr3The mixed powder consisting of Si powder and the multilayer graphene sheets is formed by spraying.
3. The erosion-resistant graphene composite gradient coating as claimed in claim 2, wherein the NiCrAlY composite powder in the priming layer has an average particle size of 38-75 μm, a Cr content of 18-24 wt%, an Al content of 7-13 wt%, a Y content of 0.5-1.0 wt%, and the balance of Ni.
4. The erosion resistant graphene composite gradient coating of claim 2, wherein Al in the working layer2O3Powder, nano TiO2Powder, TiB2Powder and Cr3The mass ratio of the Si powder is 75-90: 3-15: 2-5: 2 to 5.
5. The erosion resistant graphene composite gradient coating of claim 2, wherein Al in the working layer2O3The particle size of the powder is 23-45 mu m; nano TiO 22The particle size of the powder is 50-100 nm; TiB2The particle size of the powder is 26-53 mu m; cr (chromium) component3The particle size of the Si powder is 26 to 53 μm.
6. The erosion-resistant graphene composite gradient coating of claim 2, wherein the number of added graphene sheets in the working layer is less than 8; the content of the multilayer graphene sheet accounts for 0.25-1.5 wt% of the total mass of the working layer mixed powder.
7. The erosion resistant graphene composite gradient coating of claim 1, wherein in the first transition layer, the second transition layer and the third transition layer, the NiCrAlY composite powder is formed by Al and NiCrAlY composite powder2O3Powder, nano TiO2Powder, TiB2Powder of Cr3The total mass ratio of the mixed powder consisting of the Si powder and the multilayer graphene sheets is 2-4: 1, 1: 0.5-1.5 and 0.5-1.5: 2-4 respectively, wherein Al in each transition layer2O3Powder, nano TiO2Powder, TiB2Powder of Cr3The Si powder and the multilayer graphene sheets have the same composition as the working layer.
8. The erosion resistant graphene composite gradient coating of claim 1, wherein the thickness of the primer layer, the transition layer and the working layer is 30-50 μ ι η, 150-200 μ ι η and 100-120 μ ι η, respectively.
9. The preparation method of the erosion-resistant graphene composite gradient coating according to claim 1, characterized by comprising the following steps:
(1) carrying out ultrasonic cleaning, drying and roughening treatment on the surface of the MWD outer cylinder;
(2) preheating the substrate treated in the step (1) by using flame of a plasma spray gun; then spraying a NiCrAlY priming coat; respectively spraying three transition layers; and finally spraying a working layer.
(3) And carrying out laser cladding on the surface of the sample subjected to the plasma spraying.
10. The erosion-resistant graphene composite gradient coating of claim 1, wherein the microhardness of the prepared gradient coating is 800-1050 HV, the roughness is 6.03-8.19 μm, the bonding strength of the coating is 25-36 MPa, and the erosion wear rate is 0.0472-0.0864 mg-cm-2·min-1。
CN202010330727.1A 2020-04-24 2020-04-24 Anti-erosion graphene composite gradient coating on outer cylinder surface of MWD (measurement while drilling) instrument Pending CN111394681A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010330727.1A CN111394681A (en) 2020-04-24 2020-04-24 Anti-erosion graphene composite gradient coating on outer cylinder surface of MWD (measurement while drilling) instrument

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010330727.1A CN111394681A (en) 2020-04-24 2020-04-24 Anti-erosion graphene composite gradient coating on outer cylinder surface of MWD (measurement while drilling) instrument

Publications (1)

Publication Number Publication Date
CN111394681A true CN111394681A (en) 2020-07-10

Family

ID=71433442

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010330727.1A Pending CN111394681A (en) 2020-04-24 2020-04-24 Anti-erosion graphene composite gradient coating on outer cylinder surface of MWD (measurement while drilling) instrument

Country Status (1)

Country Link
CN (1) CN111394681A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112725720A (en) * 2020-12-23 2021-04-30 中国兵器工业第五九研究所 High-temperature-resistant composite ceramic insulating coating and preparation method thereof
CN114411080A (en) * 2021-12-29 2022-04-29 钢铁研究总院 Thermal protection composite coating and manufacturing method thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103184399A (en) * 2011-12-31 2013-07-03 江苏太阳宝新能源有限公司 Solar photo-thermal power generation high temperature protective coating and preparation method thereof
CN106350758A (en) * 2016-09-18 2017-01-25 安徽克里斯特新材料有限公司 Method for preparing graphene enhanced iron-based composite material by thermal spraying
US20180105918A1 (en) * 2015-03-27 2018-04-19 University Of Central Florida Research Foundation, Inc. Thermal Spray of Repair and Protective Coatings

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103184399A (en) * 2011-12-31 2013-07-03 江苏太阳宝新能源有限公司 Solar photo-thermal power generation high temperature protective coating and preparation method thereof
US20180105918A1 (en) * 2015-03-27 2018-04-19 University Of Central Florida Research Foundation, Inc. Thermal Spray of Repair and Protective Coatings
CN106350758A (en) * 2016-09-18 2017-01-25 安徽克里斯特新材料有限公司 Method for preparing graphene enhanced iron-based composite material by thermal spraying

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
冯彦寒等: "等离子喷涂制备石墨烯/Al2O3+TiO2自润滑涂层及其性能研究", 《表面技术》 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112725720A (en) * 2020-12-23 2021-04-30 中国兵器工业第五九研究所 High-temperature-resistant composite ceramic insulating coating and preparation method thereof
CN112725720B (en) * 2020-12-23 2022-08-09 中国兵器工业第五九研究所 High-temperature-resistant composite ceramic insulating coating and preparation method thereof
CN114411080A (en) * 2021-12-29 2022-04-29 钢铁研究总院 Thermal protection composite coating and manufacturing method thereof
CN114411080B (en) * 2021-12-29 2022-11-11 钢铁研究总院 Thermal protection composite coating and manufacturing method thereof

Similar Documents

Publication Publication Date Title
CN102441672B (en) Method for preparing metal-based gradient coating with enhanced laser-cladding ceramic nano-particles
CN111455301B (en) Wear-resistant corrosion-resistant high-entropy alloy gradient composite coating of outer cylinder of measurement-while-drilling instrument
CN105624670B (en) Aluminium alloy element surface abrasion resistance antifriction composite coating and preparation method thereof
CN111394681A (en) Anti-erosion graphene composite gradient coating on outer cylinder surface of MWD (measurement while drilling) instrument
CN104388885A (en) High hardness Ni60A-WC nano coating and preparation method thereof
CN107254652A (en) A kind of multilayer thermal barrier coating and preparation method thereof
CN108866470A (en) A kind of preparation method of air plasma spraying alloy-ceramic laminar coating
CN108531844B (en) Preparation method of rare earth oxide doped high-temperature oxidation resistant and wear-resistant coating for H13 steel surface protection
CN114231882A (en) Cavitation-resistant composite coating and preparation method thereof
CN102102203B (en) Preparation method of corrosion resistant FeAl intermetallic compound-based composite structure coating
CN113652624B (en) Tungsten carbide/silicon carbide based composite material and coating suitable for oxygen-propane supersonic flame short-distance spraying and preparation method thereof
CN104264093A (en) Fe-Gr-Ni nanometer coating and preparation method thereof
CN109985784B (en) Heat-corrosion-resistant wear-resistant composite coating, and preparation method and application thereof
CN104372337A (en) Ni-TiO2 nano coating and preparation method thereof
CN1225568C (en) Technique for preparing metal-base ceramic composite coating by electric are spraying
CN109182946B (en) Composition of wear-resistant, corrosion-resistant and medium-high temperature-resistant coating for hydraulic hoist piston rod, coating and preparation method of coating
CN115874135A (en) Double-ceramic-layer wear-resistant self-lubricating coating and preparation method thereof
CN113897575B (en) Tungsten carbide-based composite powder, coating and preparation process thereof
CN112275593B (en) Method for improving coating microstructure
CN110241352B (en) Abrasion-resistant composite material for water turbine and preparation method and application thereof
CN111394684A (en) Erosion-resistant wear-resistant zirconium-based amorphous composite gradient coating of outer cylinder of MWD (measurement while drilling) instrument
Kumar et al. Mechanisms of slurry erosion in coatings of hydro-turbines
CN107460424A (en) Wear-and corrosion-resistant nano silicon nitride Aluminium composite coating
CN104947027A (en) MnO2-TiC-Co nanometer material and preparation method thereof
CN115612965B (en) Preparation method of completely amorphous coating

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20200710

RJ01 Rejection of invention patent application after publication