CN108588617B - Preparation process of anticorrosive wear-resistant coating of ball valve - Google Patents
Preparation process of anticorrosive wear-resistant coating of ball valve Download PDFInfo
- Publication number
- CN108588617B CN108588617B CN201810246885.1A CN201810246885A CN108588617B CN 108588617 B CN108588617 B CN 108588617B CN 201810246885 A CN201810246885 A CN 201810246885A CN 108588617 B CN108588617 B CN 108588617B
- Authority
- CN
- China
- Prior art keywords
- powder
- nicrbsi
- valve seat
- ball
- coating
- 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.)
- Active
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
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/129—Flame spraying
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
- C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
- C22C19/051—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W
- C22C19/057—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W with the maximum Cr content being less 10%
-
- 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
- C22C29/08—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 tungsten carbide
-
- 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
- C23C4/08—Metallic material containing only metal elements
Abstract
The invention relates to a preparation process of an anticorrosive wear-resistant coating of a ball valve, which is characterized by comprising the following steps of: the base layer of NiCrBSi alloy coating is firstly sprayed on the valve seat and the ball body by adopting a supersonic flame spraying process, and then the surface layer of an alloy carbide layer is sprayed on the coating. Because the price of NiCrBSi alloy powder is lower than that of alloy carbide powder and the deposition is higher, the preparation cost of the composite coating is reduced by about 30 percent, and in addition, the double-coating structure has higher corrosion resistance while keeping the same wear resistance, and is very suitable for preparing coatings of sealing valves and valve seats.
Description
Technical Field
The invention relates to a preparation process of an anticorrosive wear-resistant coating of a ball valve, belonging to the technical field of material surface treatment.
Background
Currently, the use of a supersonic flame spray process to prepare WC-10Co4Cr coatings on the ball and valve seat for corrosion and wear resistance of hard-seal ball valves has been widely used. However, the deposition rate of the powder of the WC-10Co4Cr coating sprayed by the supersonic flame is low (generally lower than 45%), and the price of the WC-10Co4Cr material is higher and higher due to the rising price of the WC and Co powder, so that the preparation cost of the protective coating of the hard sealing valve can be reduced by improving the structure and the material of the coating urgently.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a preparation process of an anticorrosion wear-resistant coating of a ball valve, which can obviously reduce the preparation cost of the coating of a hard seal valve while maintaining the wear-resistant and anticorrosion performance of the coating.
According to the technical scheme provided by the invention, the preparation process of the anticorrosive wear-resistant coating of the ball valve is characterized by comprising the following steps of:
(1) carrying out multi-pass ultrasonic cleaning, oil removal, water washing and drying on the ball and the valve seat part, and then carrying out sand blasting activation and coarsening on the surfaces of the ball and the valve seat;
(2) moving the ball body to a rotary worktable and synchronously rotating along with the rotating shaft, and spraying NiCrBSi powder and WC-10Co4Cr powder to the ball body by a spray gun by adopting a supersonic flame spraying process in sequence, thereby forming a NiCrBSi bottom layer and a WC-10Co4Cr surface layer on the surface of the ball body;
(3) grinding the ball after spraying, wherein the grinding amount is 50-60 mu m and is about 5 mu m;
(4) fixing the valve seat on a plane fixture, and spraying NiCrBSi powder and WC-10Co4Cr powder to the valve seat by a spray gun in sequence by adopting a supersonic flame spraying process, thereby forming a NiCrBSi bottom layer and a WC-10Co4Cr surface layer on the surface of the valve seat;
(4) after the valve seat is sprayed, the valve seat is ground, ground and ultra-finely ground and then is in opposite grinding with the ball body;
the NiCrBSi powder comprises the following components: c: 0.7-1%, B: 3.0 to 4.5 percent of Si, 3.5 to 5.5 percent of Cr, 15.0 to 18.0 percent of Cr, less than or equal to 5.0 percent of Fe and the balance of N; the WC-10Co4Cr powder comprises the following components: WC: 86%, Co: 10%, Cr: 4 percent.
Further, the thickness of the NiCrBSi coating is about 150 μm, and the thickness of the WC-10Co4Cr coating is about 150 μm.
Further, the supersonic flame spraying system adopts liquid kerosene as fuel and oxygen as combustion-supporting gas, or adopts propane or propylene as fuel and oxygen or/and air as combustion-supporting gas.
Further, the flow rate of kerosene is 20L/h and the flow rate of oxygen is 55m when NiCrBSi powder is sprayed in the step (2)3The powder feeding rate is 70g/min, and the spraying distance is 380 mm.
Further, the flow rate of kerosene and oxygen in spraying WC-10Co4Cr powder in the step (2) was 25L/h and 55m3The powder feeding rate is 70g/min, and the spraying distance is 380 mm.
Further, the flow rate of kerosene is 20L/h and the flow rate of oxygen is 55m when NiCrBSi powder is sprayed in the step (4)3The powder feeding rate is 70g/min, and the spraying distance is 380 mm.
Further, the flow rate of kerosene and oxygen was 22L/h and 55m, respectively, when WC-10Co4Cr powder was sprayed in step (4)3The powder feeding rate is 70g/min, and the spraying distance is 380 mm.
Further, the spray gun moves according to an arc track in the step (2), the flame flow of the spray gun is kept to be always aligned with the center of the sphere, the linear speed of the rotation of the sphere is 600mm/s, and the moving step distance of the spray gun is 5 mm; and (4) the spray gun does reciprocating linear motion, the moving speed of the spray gun is 600mm/s, the step distance is 5mm, and the flame flow of the spray gun is kept to be vertical to the surface to be sprayed of the valve seat.
Further, in the ball and valve seat sand blasting process in the step (1), the compressed air pressure is 0.4-0.6MPa, the sand granularity is 20-40 meshes, and the surface roughness after sand blasting is Ra 4-8.
Further, the total thickness of the coating after the grinding processing in the step (4) is 230-.
The invention has the following advantages:
(1) the structure of the invention adopting NiCrBSi as the bottom layer WC-10Co4Cr coating as the surface layer can keep the same wear resistance and better corrosion resistance as the single WC-10Co4Cr coating, and the preparation cost of the coating can be reduced by about 30 percent (the price of the NiCrBSi powder is only one third of that of WC-10Co4Cr powder, the deposition rate of the NiCrBSi powder is 55 percent higher than that of WC-10Co4Cr powder, and the density of the NiCrBSi is only about half of that of WC-10Co4 Cr);
(2) the valve seat adopts a slightly low kerosene flow, so that the hardness of the coating sprayed on the valve seat is lower than that of the coating on the ball body by about HV100, the abrasion mainly occurs on the valve seat in the use process of the ball valve, the ball body is not easily scratched, and the service life of the hard sealing ball valve is greatly prolonged.
Drawings
FIG. 1 is a schematic structural view of NiCrBSi as a bottom WC-10Co4Cr coating as a top layer.
FIG. 2 is a cross-sectional metallographic photograph of NiCrBSi as the underlayer WC-10Co4Cr coating as the overlayer.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Example 1:
(1) carrying out ultrasonic cleaning, oil removing, water washing and drying treatment on a ball and a valve seat part which are made of 316 stainless steel twice;
(2) adopting white corundum sand with the granularity of 20-40 to carry out roughening treatment on the surface of the sphere under the pressure of 0.4-0.6MPa, wherein the surface roughness after sand blasting treatment is Ra 4-7;
(3) moving the ball body to a rotary worktable, synchronously rotating along with a rotating shaft, and spraying NiCrBSi powder and WC-10Co4Cr powder to the ball body in sequence by adopting a JP8000 spray gun, thereby forming a NiCrBSi bottom layer and a WC-10Co4Cr surface layer on the surface of the ball body; the spray gun is controlled by a six-axis manipulator, the spray gun is driven to move according to an arc track, flame flow of the spray gun is kept to be always aligned with the center of the sphere, and the moving speed of the spray gun is adjusted according to different linear speeds of the corresponding spheres of the spray spots so as to ensure the uniformity of the thickness of the coating deposited on the surface of the sphere; generally, the linear speed of the rotation of the ball is 600mm/s, and the moving step distance of the spray gun is 5 mm; the NiCrBSi powder comprises the following components: c: 1%, B: 4.5 percent of Si, 5.5 percent of Cr, 18.0 percent of Cr, less than or equal to 5.0 percent of Fe and the balance of N; the WC-10Co4Cr powder comprises the following components: WC: 86%, Co: 10%, Cr: 4 percent;
the flow rate of kerosene and oxygen was 20L/h and 55m respectively when NiCrBSi powder was sprayed3The powder feeding rate is 70g/min, the spraying distance is 380mm, and the thickness of the obtained NiCrBSi coating is 150 mu m; the flow rate of kerosene and oxygen was 25L/h and 55m, respectively, when WC-10Co4Cr powder was sprayed3The powder feeding rate is 70g/min, the spraying distance is 380mm, and the thickness of the obtained WC-10Co4Cr coating is 150 mu m;
(4) grinding the ball after spraying, wherein the grinding amount is 50-60 mu m and is 5 mu m;
(5) fixing the valve seat on a plane fixture, and spraying NiCrBSi powder and WC-10Co4Cr powder to the valve seat by a spray gun in sequence by adopting a supersonic flame spraying process, thereby forming a NiCrBSi bottom layer and a WC-10Co4Cr surface layer on the surface of the valve seat; the spray gun is controlled by a six-axis manipulator, the spray gun is driven to do reciprocating linear motion, the moving speed of the spray gun is 600mm/s, the moving step distance of the spray gun is 5mm, and the flame flow of the spray gun is kept to be vertical to the surface to be sprayed of the valve seat; the NiCrBSi powder comprises the following components: c: 1%, B: 4.5 percent of Si, 5.5 percent of Cr, 18.0 percent of Cr, less than or equal to 5.0 percent of Fe and the balance of N; the WC-10Co4Cr powder comprises the following components: WC: 86%, Co: 10%, Cr: 4 percent;
the flow rate of kerosene and oxygen was 20L/h and 55m respectively when NiCrBSi powder was sprayed3The powder feeding rate is 70g/min, the spraying distance is 380mm, and the thickness of the obtained NiCrBSi coating is 150 mu m; the flow rate of kerosene and oxygen was 22L/h and 55m, respectively, when WC-10Co4Cr powder was sprayed3The powder feeding rate is 70g/min, the spraying distance is 380mm, and the thickness of the obtained WC-10Co4Cr coating is 150 mu m;
(4) after the valve seat is sprayed, the valve seat is ground in a rough grinding, fine grinding and ultra-fine grinding mode and then is in opposite grinding with the ball body, and therefore the sealing performance between the ball body and the valve seat is improved.
As shown in FIG. 1, it is a schematic structural diagram of NiCrBSi as the bottom layer WC-10Co4Cr coating as the surface layer, wherein 1 is the substrate (sphere or valve seat), 2 is the NiCrBSi coating, and 3 is the WC-10Co4Cr coating. As shown in FIG. 2, the cross-sectional metallographic photograph of NiCrBSi as the underlayer WC-10Co4Cr coating as the top layer.
Example 2:
(1) carrying out ultrasonic cleaning, oil removing, water washing and drying treatment on a ball and a valve seat part which are made of 316 stainless steel twice;
(2) adopting white corundum sand with the granularity of 20-40 to carry out roughening treatment on the surface of the sphere under the pressure of 0.4-0.6MPa, wherein the surface roughness after sand blasting treatment is Ra 4-7;
(3) moving the ball body to a rotary worktable, synchronously rotating along with a rotating shaft, and spraying NiCrBSi powder and WC-10Co4Cr powder to the ball body in sequence by adopting a JP8000 spray gun, thereby forming a NiCrBSi bottom layer and a WC-10Co4Cr surface layer on the surface of the ball body; the spray gun is controlled by a six-axis manipulator, the spray gun is driven to move according to an arc track, flame flow of the spray gun is kept to be always aligned with the center of the sphere, and the moving speed of the spray gun is adjusted according to different linear speeds of the corresponding spheres of the spray spots so as to ensure the uniformity of the thickness of the coating deposited on the surface of the sphere; generally, the linear speed of the rotation of the ball is 600mm/s, and the moving step pitch of the spray gun is 5 mm; the NiCrBSi powder comprises the following components: c: 0.7%, B: 3.0 percent of Si, 3.5 percent of Cr, less than or equal to 5.0 percent of Fe and the balance of N; the WC-10Co4Cr powder comprises the following components: WC: 86%, Co: 10%, Cr: 4 percent;
spraying NiCThe flow rate of kerosene was 20L/h and the flow rate of oxygen was 55m in the case of rBSi powder3The powder feeding rate is 70g/min, the spraying distance is 380mm, and the thickness of the obtained NiCrBSi coating is 150 mu m; the flow rate of kerosene and oxygen was 25L/h and 55m, respectively, when WC-10Co4Cr powder was sprayed3The powder feeding rate is 70g/min, the spraying distance is 380mm, and the thickness of the obtained WC-10Co4Cr coating is 150 mu m;
(4) grinding the ball after spraying, wherein the grinding amount is 50-60 mu m and is 5 mu m;
(5) fixing the valve seat on a plane fixture, and spraying NiCrBSi powder and WC-10Co4Cr powder to the valve seat by a spray gun in sequence by adopting a supersonic flame spraying process, thereby forming a NiCrBSi bottom layer and a WC-10Co4Cr surface layer on the surface of the valve seat; wherein the spray gun is controlled by a six-axis manipulator to drive the spray gun to do reciprocating linear motion, the moving speed of the spray gun is 600mm/s, the moving step distance of the spray gun is 5mm, and the flame flow of the spray gun is kept to be vertical to the valve seat; the NiCrBSi powder comprises the following components: c: 0.7%, B: 3.0 percent of Si, 3.5 percent of Cr, less than or equal to 5.0 percent of Fe and the balance of N; the WC-10Co4Cr powder comprises the following components: WC: 86%, Co: 10%, Cr: 4 percent;
the flow rate of kerosene and oxygen was 20L/h and 55m respectively when NiCrBSi powder was sprayed3The powder feeding rate is 70g/min, the spraying distance is 380mm, and the thickness of the obtained NiCrBSi coating is 150 mu m; the flow rate of kerosene and oxygen was 22L/h and 55m, respectively, when WC-10Co4Cr powder was sprayed3The powder feeding rate is 70g/min, the spraying distance is 380mm, and the thickness of the obtained WC-10Co4Cr coating is 150 mu m;
(4) after the valve seat is sprayed, the valve seat is ground in a rough grinding, fine grinding and ultra-fine grinding mode and then is in opposite grinding with the ball body, and therefore the sealing performance between the ball body and the valve seat is improved.
Example 3:
(1) carrying out ultrasonic cleaning, oil removing, water washing and drying treatment on a ball and a valve seat part which are made of 316 stainless steel twice;
(2) adopting white corundum sand with the granularity of 20-40 to carry out roughening treatment on the surface of the sphere under the pressure of 0.4-0.6MPa, wherein the surface roughness after sand blasting treatment is Ra 4-7;
(3) moving the ball body to a rotary worktable, synchronously rotating along with a rotating shaft, and spraying NiCrBSi powder and WC-10Co4Cr powder to the ball body in sequence by adopting a JP8000 spray gun, thereby forming a NiCrBSi bottom layer and a WC-10Co4Cr surface layer on the surface of the ball body; the spray gun is controlled by a six-axis manipulator, the spray gun is driven to move according to an arc track, flame flow of the spray gun is kept to be always aligned with the center of the sphere, and the moving speed of the spray gun is adjusted according to different linear speeds of the corresponding spheres of the spray spots so as to ensure the uniformity of the thickness of the coating deposited on the surface of the sphere; generally, the rotating speed of the ball body is 600mm/s, and the moving step pitch of the spray gun is 5 mm; the NiCrBSi powder comprises the following components: c: 0.8%, B: 4 percent of Si, 4.5 percent of Cr, 16.0 percent of Cr, less than or equal to 5.0 percent of Fe and the balance of N; the WC-10Co4Cr powder comprises the following components: WC: 86%, Co: 10%, Cr: 4 percent;
the flow rate of kerosene and oxygen was 20L/h and 55m respectively when NiCrBSi powder was sprayed3The powder feeding rate is 70g/min, the spraying distance is 380mm, and the thickness of the obtained NiCrBSi coating is 150 mu m; the flow rate of kerosene and oxygen was 25L/h and 55m, respectively, when WC-10Co4Cr powder was sprayed3The powder feeding rate is 70g/min, the spraying distance is 380mm, and the thickness of the obtained WC-10Co4Cr coating is 150 mu m;
(4) grinding the ball after spraying, wherein the grinding amount is 50-60 mu m and is 5 mu m;
(5) fixing the valve seat on a plane fixture, and spraying NiCrBSi powder and WC-10Co4Cr powder to the valve seat by a spray gun in sequence by adopting a supersonic flame spraying process, thereby forming a NiCrBSi bottom layer and a WC-10Co4Cr surface layer on the surface of the valve seat; wherein the spray gun is controlled by a six-axis manipulator to drive the spray gun to do reciprocating linear motion, the moving speed of the spray gun is 600mm/s, the moving step distance of the spray gun is 5mm, and the flame flow of the spray gun is kept to be vertical to the valve seat; the NiCrBSi powder comprises the following components: c: 0.8%, B: 4 percent, 4.5 percent of Si, 16.0 percent of Cr, less than or equal to 5.0 percent of Fe and the balance of N; the WC-10Co4Cr powder comprises the following components: WC: 86%, Co: 10%, Cr: 4 percent;
the flow rate of kerosene and oxygen was 20L/h and 55m respectively when NiCrBSi powder was sprayed3The powder feeding rate is 70g/min, the spraying distance is 380mm, and the thickness of the obtained NiCrBSi coating is 150 mu m; kerosene for spraying WC-10Co4Cr powderThe flow rate of (2) is 22L/h, and the flow rate of oxygen is 55m3The powder feeding rate is 70g/min, the spraying distance is 380mm, and the thickness of the obtained WC-10Co4Cr coating is 150 mu m;
(4) after the valve seat is sprayed, the valve seat is ground in a rough grinding, fine grinding and ultra-fine grinding mode and then is in opposite grinding with the ball body, and therefore the sealing performance between the ball body and the valve seat is improved.
Claims (9)
1. A preparation process of an anticorrosive wear-resistant coating of a ball valve is characterized by comprising the following steps:
(1) carrying out multi-pass ultrasonic cleaning, oil removal, water washing and drying on the ball and the valve seat part, and carrying out sand blasting activation and coarsening on the surfaces of the ball and the valve seat;
(2) moving the ball body onto a rotary worktable, synchronously rotating with the rotary shaft, and sequentially spraying NiCrBSi powder and WC-10Co by supersonic flame spraying process4Cr powder to form NiCrBSi underlayer and WC-10Co on the surface of the sphere4A Cr surface layer;
(3) grinding the ball after spraying, wherein the grinding amount is 50-60 mu m and is 5 mu m;
(4) fixing the valve seat on a planar fixture, and spraying NiCrBSi powder and WC-10Co powder onto the valve seat by supersonic flame spraying process4Cr powder to form a NiCrBSi underlayer and WC-10Co on the valve seat surface4A Cr surface layer;
(5) after the valve seat is sprayed, the valve seat is ground, ground and ultra-finely ground and then is in opposite grinding with the ball body;
the NiCrBSi powder comprises the following components: c: 0.7-1%, B: 3.0 to 4.5 percent of Si, 3.5 to 5.5 percent of Cr, 15.0 to 18.0 percent of Cr, less than or equal to 5.0 percent of Fe and the balance of Ni; the WC-10Co4Cr powder comprises the following components: WC: 86%, Co: 10%, Cr: 4 percent;
the thickness of the coating formed by the NiCrBSi powder is 150 mu m, and the WC-10Co4The thickness of the Cr coating was 150. mu.m.
2. A process for preparing an anti-corrosion wear-resistant coating of a ball valve as claimed in claim 1, which is characterized in that: the supersonic flame spraying process adopts liquid kerosene as fuel and oxygen as combustion-supporting gas, or adopts propane or propylene as fuel and oxygen or/and air as combustion-supporting gas.
3. A process for preparing an anticorrosive wear-resistant coating for a ball valve according to claim 2, which is characterized in that: the flow rate of kerosene is 20L/h and the flow rate of oxygen is 55m when NiCrBSi powder is sprayed in the step (2)3The powder feeding rate is 70g/min, and the spraying distance is 380 mm.
4. A process for preparing an anticorrosive wear-resistant coating for a ball valve according to claim 2, which is characterized in that: the flow rate of kerosene is 25L/h and the flow rate of oxygen is 55m when WC-10Co4Cr powder is sprayed in the step (2)3The powder feeding rate is 70g/min, and the spraying distance is 380 mm.
5. A preparation process of an anticorrosive wear-resistant coating of a ball valve as claimed in claim 4, characterized in that: the flow rate of kerosene is 20L/h and the flow rate of oxygen is 55m when NiCrBSi powder is sprayed in the step (4)3The powder feeding rate is 70g/min, and the spraying distance is 380 mm.
6. A process for preparing an anticorrosive wear-resistant coating for a ball valve according to claim 2, which is characterized in that: the flow rate of kerosene is 22L/h and the flow rate of oxygen is 55m when WC-10Co4Cr powder is sprayed in the step (4)3The powder feeding rate is 70g/min, and the spraying distance is 380 mm.
7. A process for preparing an anti-corrosion wear-resistant coating of a ball valve as claimed in claim 1, which is characterized in that: in the step (2), the spray gun moves according to an arc track, the flame flow of the spray gun is kept to be always aligned with the center of a sphere, the linear speed of the rotation of the sphere is 600mm/s, and the moving step pitch of the spray gun is 5 mm; and (4) the spray gun does reciprocating linear motion, the moving speed of the spray gun is 600mm/s, the step distance is 5mm, and the flame flow of the spray gun is kept to be vertical to the surface to be sprayed of the valve seat.
8. A process for preparing an anti-corrosion wear-resistant coating of a ball valve as claimed in claim 1, which is characterized in that: in the sand blasting process of the ball and the valve seat in the step (1), the pressure of compressed air is 0.4-0.6MPa, the granularity of sand is 20-40 meshes, and the surface roughness after sand blasting is Ra 4-8.
9. A process for preparing an anti-corrosion wear-resistant coating of a ball valve as claimed in claim 1, which is characterized in that: the total thickness of the coating after the grinding processing in the step (4) is 230-240 mu m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810246885.1A CN108588617B (en) | 2018-03-23 | 2018-03-23 | Preparation process of anticorrosive wear-resistant coating of ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810246885.1A CN108588617B (en) | 2018-03-23 | 2018-03-23 | Preparation process of anticorrosive wear-resistant coating of ball valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108588617A CN108588617A (en) | 2018-09-28 |
| CN108588617B true CN108588617B (en) | 2020-06-23 |
Family
ID=63627393
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810246885.1A Active CN108588617B (en) | 2018-03-23 | 2018-03-23 | Preparation process of anticorrosive wear-resistant coating of ball valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108588617B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109433550A (en) * | 2018-12-18 | 2019-03-08 | 郑州立佳热喷涂机械有限公司 | The tungsten carbide wear-resistant coating spraying process of oil cylinder |
| CN110331360A (en) * | 2019-08-22 | 2019-10-15 | 广东省新材料研究所 | Paper for daily use dandy roll and the preparation method and application thereof |
| CN110421242A (en) * | 2019-09-17 | 2019-11-08 | 中德云岭(成都)科技有限公司 | A kind of wear resistant alloy material and the wear-resisting cutter ring plasma surfacing technique of shield machine |
| CN111118433A (en) * | 2020-01-19 | 2020-05-08 | 云南云内动力机械制造有限公司 | Thermal spraying engine valve seat ring wear-resistant coating, preparation method and application |
| CN111455306A (en) * | 2020-05-07 | 2020-07-28 | 超达阀门集团股份有限公司 | Manufacturing process of nickel-based tungsten carbide wear-resistant coating of metal hard sealing ball valve |
| CN113564595B (en) * | 2021-08-27 | 2023-09-12 | 三一石油智能装备有限公司 | Disordered alloy coating reinforced valve seat, preparation method thereof and pump |
| CN114921743A (en) * | 2022-05-23 | 2022-08-19 | 广东粤科新材料科技有限公司 | Method for prolonging service life of pressure chamber and injection head of die-casting machine by using composite coating |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008001720A1 (en) * | 2008-05-13 | 2009-11-19 | Voith Patent Gmbh | Coating surface of roller containing steel substrate by thermal injection, comprises smelting and melting spray additive material containing nanomaterials and then disposing on the surface, and applying coating on the preprocessed surface |
| CN102818042A (en) * | 2012-08-30 | 2012-12-12 | 科普蓝(上海)阀门工业有限公司 | Ball valve special for polycrystalline silicon |
| CN105349933A (en) * | 2015-11-11 | 2016-02-24 | 无锡清杨机械制造有限公司 | Preparation method of metal ceramic coating |
| CN106399902A (en) * | 2016-11-18 | 2017-02-15 | 无锡明盛纺织机械有限公司 | Wear-resistant and corrosion-resistant gradient coating magnesium alloy and preparation method thereof |
| CN106868442A (en) * | 2017-02-27 | 2017-06-20 | 郑州立佳热喷涂机械有限公司 | The control method of supersonic speed even application ball valve anti-wear coating |
-
2018
- 2018-03-23 CN CN201810246885.1A patent/CN108588617B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN108588617A (en) | 2018-09-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108588617B (en) | Preparation process of anticorrosive wear-resistant coating of ball valve | |
| CN101736279B (en) | Hypersonic flame spraying process for self-lubricating wear-resistant coating | |
| CN103757581B (en) | Middle high-temperature furnace roller surface supersonic flame spraying method | |
| CN109023365B (en) | Lip-type oil seal rotating shaft wear-resistant antifriction composite coating and preparation method thereof | |
| CN103103470A (en) | Anti-sticking coating | |
| CN103953772B (en) | Tungsten carbide nitrogenizes the superhard wear valve of chromium composite coat | |
| JP5221957B2 (en) | Bearing material and method for manufacturing bearing material | |
| CN106637035A (en) | Wear-resistant coating on valve plate of EB furnace equipment gate valve, and spraying technology thereof | |
| Barletta | Progress in abrasive fluidized bed machining | |
| CN109023202A (en) | The structure and preparation method thereof of the compound painting-film plating layer of flame-spraying+PVD plated film | |
| US8535755B2 (en) | Corrosion resistant riser tensioners, and methods for making | |
| CN101705842B (en) | Wear-resistance layers on surfaces of inner ring and outer ring of bypass variable mechanism of gas turbine and preparation method thereof | |
| CN104099556A (en) | Method for spraying tungsten carbide on surface of corrugated roller | |
| CN205770154U (en) | A kind of surface is provided with the aluminium alloy guide of wear-resistant coating | |
| CN107937857B (en) | Wear-resisting composite coating of a kind of 7075 aluminium alloy surface anti-corrosions erosion and preparation method thereof | |
| CN102031479A (en) | Preparation method for continuous pipe injection head clamping block with friction-increasing coating | |
| CN212223077U (en) | Titanium alloy shaft part | |
| US10252398B2 (en) | Tools and related methods for cold working fluid ends | |
| CN113088956A (en) | Cold spraying-based corrosion-resistant composite coating and preparation method and application thereof | |
| CN113862602B (en) | Method for spraying Stellite20 alloy on surface of workpiece | |
| CN108950452A (en) | One kind is aluminized silicon line sinking roller spray-on coating and preparation method thereof | |
| CN112524116B (en) | Hydraulic piston rod and surface composite functional coating thereof and preparation method | |
| CN102828141A (en) | Method for spraying tungsten carbide alloy on valve plate sealing surface at supersonic speed | |
| RU2551037C2 (en) | Method for obtaining wear and corrosion resistant gradient coating | |
| CN105714292A (en) | Surface-hardening treatment method for hard sealing ball valve sealing pair |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |