CN107475660B - A kind of plasma ashing tungsten spraying production technology - Google Patents
A kind of plasma ashing tungsten spraying production technology Download PDFInfo
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- CN107475660B CN107475660B CN201710768703.2A CN201710768703A CN107475660B CN 107475660 B CN107475660 B CN 107475660B CN 201710768703 A CN201710768703 A CN 201710768703A CN 107475660 B CN107475660 B CN 107475660B
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- 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
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- 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
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- 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
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- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
The invention discloses a kind of plasma ashing tungsten to spray production technology, and specific step is as follows: S1: workpiece pretreatment for the plasma ashing tungsten spraying production technology；S2: blasting treatment；S3: sanding and polishing processing；S4: tungsten carbide processing；S5: thermal response；S6: mechanical enhancer；S7: equipment adjustment；S8: powder supply；S9: spray distance and angle of spray；S10: workpiece the pre-heat treatment；S11 spraying；S12: workpiece cooling packing.The present invention is flat and smooth by coating that plasma spraying obtains, consistency is high, and powder deposition is very high, matrix is not charged, non-fusible in spraying process, matrix and spray gun relative moving speed are fast, so that matrix does not change, and tungsten-carbide powder is handled by mechanical enhancer, spraying penetration works well, and in the indoor progress of dust removal by ventilation in spraying and cooling procedure, effectively the adsorbing powder dust generated in the course of work can be filtered, guarantee working environment, is suitble to be widely popularized.
Description
Technical field
The present invention relates to tungsten carbide spraying technology field, specially a kind of plasma ashing tungsten sprays production technology.
Background technique
Spraying is dispersed into uniform and fine droplet, applied by spray gun or dish-style atomizer by means of pressure or centrifugal force
It is applied to the coating process on coated article surface.Aerial spraying, airless spraying, electrostatic spraying and above-mentioned basic spraying shape can be divided into
The mode of the various derivations of formula, such as big flow low-pressure atomizing spraying, thermal spraying, automatic spraying, multiple groups spraying, spraying operation
High production efficiency, is suitable for handwork and industrial automation produces, and having a wide range of application mainly has hardware, plastic cement, family property, army
The fields such as work, ship are now using a kind of most common coating mode；Spraying operation needs environmental requirement to have million grades to hundred
The dust-free workshop of grade, spraying equipment have spray gun, and paint spray booth, for paint room, curing oven/drying oven, spraying workpiece conveys operating equipment,
Fog dispersal and waste water, waste gas treatment equipment etc..
Metal spraying is to be sprayed on matrix surface with the high-velocity particles stream of molten metal, to generate the material protection skill of coating
Art is zinc, aluminium and alumin(i)um zinc alloy using most metal materials, mainly to protect the large-sized structural parts of steel.In nineteen fifty-two
State once in 264 35 kilovolts of transmission tower top spraying zincs success of Huainan power plant, had saved a large amount of maintenance costs.Aluminium-plated ratio spraying
Zinc is more suitable for the component to work in severe industrial atmosphere and marine atmosphere, at the same also have wear-resisting, resistance to high temperature oxidation and
The performance of anti-sulfur-containing compound gas attack.Metal spraying is characterized in: workpiece size no maximum, and matrix is heated to be usually no more than
200 DEG C, the adhesive force between coating and matrix may be up to 7 megapascal.Surface roughness after spraying can drop to Ra1.25 microns, add
Ra0.16~0.04 micron can be arrived after work.But the coating surface that arc process sprays is poor, can reach general accurate work after processed
Part.
Traditional tungsten carbide spraying process is complicated, and the flat and smooth of coating, consistency be not high, and matrix is easy to happen change
Change, cost of equipment maintenance is high, and a large amount of dust can be generated in spraying process, is easy pollution surrounding enviroment.
Summary of the invention
The purpose of the present invention is to provide a kind of plasma ashing tungsten to spray production technology, to solve in above-mentioned background technique
The problem of proposition.
It to achieve the above object, should the invention provides the following technical scheme: a kind of plasma ashing tungsten sprays production technology
Specific step is as follows for plasma ashing tungsten spraying production technology:
S1: workpiece pretreatment will need the workpiece that sprays to be drawn as CAD diagram paper matrix formula, according to drawing pattern to needing on workpiece
Area to be protected is protected；
S2: blasting treatment will need the workpiece sprayed to use compressed air for power, to form high velocity spray beam for material spray
High speed, which is ejected into, need to handle workpiece surface, and the appearance of workpiece surface or shape is made to change；
S3: sanding and polishing processing send the workpiece that blasting treatment in S2 is completed to progress sanding and polishing processing on polishing machine,
The revolving speed of polishing machine is in 1500-2500 r/min, machining accuracy: surface roughness Ra≤0.25 μm；
S4: tungsten carbide raw material is crushed and is uniformly mixed by ball-milling technology by tungsten carbide processing；
S5: thermal response will obtain broken raw material and carry out thermal response in the ion stream of plasma generator to obtain in S4
Mixture of powders；
S6: the mixture of powders in S5 is put into the bronze drum of centrifugal planetary grinder by mechanical enhancer, with diameter 8mm
Copper ball the grinding of 5min is carried out to powder, wherein copper ball weight 200g, powder are added at one time weight no more than 10g, obtain powder
Expect spare；
S7: N is selected in equipment adjustment2Gas is adjusted as plasma gas, gas flow 2000L/h, pressure 0.8MPa
Whole arc power, so that arc temperature control is at 2870 DEG C -2900 DEG C；
S8: powder supply will obtain powder by powder feeder and supply powder to spray gun in S6；
S9: spray distance and angle of spray adjust the nozzle face of spray gun to the linear distance of workpiece surface, and spray distance exists
70-150mm, angle of spray are 60 ° -80 °；
S10: workpiece the pre-heat treatment preheats the workpiece in S3, and preheating temperature is between 80 DEG C -150 DEG C；
S11: spraying sprays the workpiece in S10 using spray gun, and spray gun movement speed is the 30%- of pressure lid spot
50%, for thickness in 0.15 mm shallow layer below, the coating layer thickness sprayed every time does not exceed 0.02 mm, and spray gun is mobile
Speed also has an impact to the temperature rise of workpiece, for Bu Shi matrix local temperature rise is excessively high and causes thermal deformation or thermal stress excessive, can mention
The method of high workpiece linear velocity accelerates the movement speed of spray gun；
S12: workpiece cooling packing, the workpiece that spraying is completed carry out natural cooling, carry out packaging and storing after the completion of cooling.
Preferably, the material spray in the step S2 can be one in copper ore, quartz sand, diamond dust, iron sand and sea sand
Kind.
Preferably, workpiece makes workpiece by impact and shear action of the blasting treatment to workpiece surface in the step S2
Surface obtain certain cleannes and different roughness, improve the mechanical performance of workpiece surface, improve workpiece
Fatigue resistance, increase its adhesive force between coating, extend the durability of film, be conducive to the levelling and dress of coating
Decorations.
Preferably, the ball milling in the step S4 carries out broken mixing using horizontal ball mill, and the revolving speed of mill tube is 45-
55r/min, charging volume are 20L-200L.
Preferably, the plasma generator in the step S5 use laminar-flow type plasmatron, laminar-flow type etc. from
The state of the plasma jet of subflow generator is gradually transitions turbulent flow from laminar flow, in the process, is decreased obviously in adhesion strength
While, the discreteness of data is also increasing, and the repeatability for finally resulting in coating performance degenerates, the oxidation spraying on side surface
Layer, dielectric strength 1.5kV prevent occurring electric arc point on the inverted conductive wall of inside reactor and on surface after cooling
Stream, to reduce the consumption of coolant liquid, the thermo parameters method in guarantee reactor section is more evenly.
Preferably, the powder feeder in the step S8 is using tall board-like powder feeder, and powder must be sent to flame during powder feeding
The heart can make powder obtain optimal heating and speed.
Preferably, it is sprayed in workpiece fabrication in the step S11, the temperature for controlling entire workpiece heats up, heating temperature
Degree is no more than 200 DEG C, enters auxiliary quenching using blower, facilitates the temperature of control workpiece.
Preferably, it needs in the spraying process of the step S11 and the cooling procedure of step S12 in the interior of dust removal by ventilation
It carries out, the adsorbing powder dust of generation is filtered by filter screen and acticarbon, guarantees working environment.
Compared with prior art, the beneficial effects of the present invention are: the plasma ashing tungsten spraying production of strict control of the present invention
Technique, by strict control plasma spray coating process data, the coating obtained by plasma spraying is flat and smooth, consistency
Height, and powder deposition is very high, and matrix is not charged, non-fusible in spraying process, and matrix and spray gun relative moving speed are fast, makes
Matrix is obtained not change.The shape and performance of matrix will not be impacted because of heated, working gas is inertia
Gas protects matrix and powder not and will receive oxidation, and impurity is few in coating, and easy to operate, cost of equipment maintenance is low, modulability
Can be good, and tungsten-carbide powder is handled by mechanical enhancer, and spraying penetration works well, and logical in spraying and cooling procedure
The adsorbing powder dust generated in the course of work can be filtered effectively, guarantee working environment by the indoor progress of wind dedusting, be suitble to wide
General popularization.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment, to this
Invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, not
For limiting the present invention.
Embodiment 1
A kind of plasma ashing tungsten spraying production technology, specific step is as follows for plasma ashing tungsten spraying production technology:
S1: workpiece pretreatment will need the workpiece that sprays to be drawn as CAD diagram paper matrix formula, according to drawing pattern to needing on workpiece
Area to be protected is protected；
S2: blasting treatment will need the workpiece sprayed to use compressed air for power, to form high velocity spray beam for material spray
High speed, which is ejected into, need to handle workpiece surface, and the appearance of workpiece surface or shape is made to change；
S3: sanding and polishing processing send the workpiece that blasting treatment in S2 is completed to progress sanding and polishing processing on polishing machine,
The revolving speed of polishing machine is in 1500r/min, machining accuracy: surface roughness Ra≤0.25 μm；
S4: tungsten carbide raw material is crushed and is uniformly mixed by ball-milling technology by tungsten carbide processing；
S5: thermal response will obtain broken raw material and carry out thermal response in the ion stream of plasma generator to obtain in S4
Mixture of powders；
S6: the mixture of powders in S5 is put into the bronze drum of centrifugal planetary grinder by mechanical enhancer, with diameter 8mm
Copper ball the grinding of 5min is carried out to powder, wherein copper ball weight 200g, powder are added at one time weight no more than 10g, obtain powder
Expect spare；
S7: N is selected in equipment adjustment2Gas is adjusted as plasma gas, gas flow 2000L/h, pressure 0.8MPa
Whole arc power, so that arc temperature control is at 2870 DEG C；
S8: powder supply will obtain powder by powder feeder and supply powder to spray gun in S6；
S9: spray distance and angle of spray adjust the nozzle face of spray gun to the linear distance of workpiece surface, and spray distance exists
70mm, angle of spray are 60 °；
S10: workpiece the pre-heat treatment preheats the workpiece in S3, and preheating temperature is at 80 DEG C；
S11: spraying sprays the workpiece in S10 using spray gun, and spray gun movement speed is the 30% of pressure lid spot,
For thickness in 0.15 mm shallow layer below, the coating layer thickness sprayed every time does not exceed 0.02 mm, spray gun movement speed
Also have an impact to the temperature rise of workpiece, for Bu Shi matrix local temperature rise is excessively high and causes thermal deformation or thermal stress excessive, work can be improved
The method of part linear velocity accelerates the movement speed of spray gun；
S12: workpiece cooling packing, the workpiece that spraying is completed carry out natural cooling, carry out packaging and storing after the completion of cooling.
Material spray in the step S2 can be one of copper ore, quartz sand, diamond dust, iron sand and sea sand, described
Workpiece makes the surface of workpiece obtain certain cleaning by impact and shear action of the blasting treatment to workpiece surface in step S2
Degree and different roughness, improve the mechanical performance of workpiece surface, improve the fatigue resistance of workpiece, increase it and
Adhesive force between coating extends the durability of film, is conducive to the levelling and decoration of coating, the ball milling in the step S4
Broken mixing is carried out using horizontal ball mill, the revolving speed of mill tube is 45r/min, and charging volume is 20L, in the step S5 etc.
Ion generator uses laminar-flow type plasmatron, and the state of the plasma jet of laminar-flow type plasmatron is from laminar flow
It is gradually transitions turbulent flow, in the process, while adhesion strength is decreased obviously, the discreteness of data is also increasing, finally
The repeatability of coating performance is caused to degenerate, the oxidation spray coating on side surface, dielectric strength 1.5kV is prevented in reactor
There is electric arc divided on internal inverted conductive wall and on surface after cooling, to reduce the consumption of coolant liquid, guarantees
More evenly, the powder feeder in the step S8 is using tall board-like powder feeder, powder feeding process for thermo parameters method in reactor section
Middle powder must be sent to flame core, and powder can be made to obtain optimal heating and speed, spray workpiece fabrication in the step S11
In, the temperature for controlling entire workpiece heats up, and warming temperature is no more than 200 DEG C, enters auxiliary quenching using blower, side
Just the temperature of workpiece is controlled, is needed in the spraying process of the step S11 and the cooling procedure of step S12 in the room of dust removal by ventilation
The adsorbing powder dust of generation is filtered by filter screen and acticarbon, guarantees working environment by interior progress.
Embodiment 2
A kind of plasma ashing tungsten spraying production technology, specific step is as follows for plasma ashing tungsten spraying production technology:
S1: workpiece pretreatment will need the workpiece that sprays to be drawn as CAD diagram paper matrix formula, according to drawing pattern to needing on workpiece
Area to be protected is protected；
S2: blasting treatment will need the workpiece sprayed to use compressed air for power, to form high velocity spray beam for material spray
High speed, which is ejected into, need to handle workpiece surface, and the appearance of workpiece surface or shape is made to change；
S3: sanding and polishing processing send the workpiece that blasting treatment in S2 is completed to progress sanding and polishing processing on polishing machine,
The revolving speed of polishing machine is in 2000r/min, machining accuracy: surface roughness Ra≤0.25 μm；
S4: tungsten carbide raw material is crushed and is uniformly mixed by ball-milling technology by tungsten carbide processing；
S5: thermal response will obtain broken raw material and carry out thermal response in the ion stream of plasma generator to obtain in S4
Mixture of powders；
S6: the mixture of powders in S5 is put into the bronze drum of centrifugal planetary grinder by mechanical enhancer, with diameter 8mm
Copper ball the grinding of 5min is carried out to powder, wherein copper ball weight 200g, powder are added at one time weight no more than 10g, obtain powder
Expect spare；
S7: N is selected in equipment adjustment2Gas is adjusted as plasma gas, gas flow 2000L/h, pressure 0.8MPa
Whole arc power, so that arc temperature control is at 2880 DEG C；
S8: powder supply will obtain powder by powder feeder and supply powder to spray gun in S6；
S9: spray distance and angle of spray adjust the nozzle face of spray gun to the linear distance of workpiece surface, and spray distance exists
110mm, angle of spray are 70 °；
S10: workpiece the pre-heat treatment preheats the workpiece in S3, and preheating temperature is at 110 DEG C；
S11: spraying sprays the workpiece in S10 using spray gun, and spray gun movement speed is the 40% of pressure lid spot,
For thickness in 0.15 mm shallow layer below, the coating layer thickness sprayed every time does not exceed 0.02 mm, spray gun movement speed
Also have an impact to the temperature rise of workpiece, for Bu Shi matrix local temperature rise is excessively high and causes thermal deformation or thermal stress excessive, work can be improved
The method of part linear velocity accelerates the movement speed of spray gun；
S12: workpiece cooling packing, the workpiece that spraying is completed carry out natural cooling, carry out packaging and storing after the completion of cooling.
Material spray in the step S2 can be one of copper ore, quartz sand, diamond dust, iron sand and sea sand, described
Workpiece makes the surface of workpiece obtain certain cleaning by impact and shear action of the blasting treatment to workpiece surface in step S2
Degree and different roughness, improve the mechanical performance of workpiece surface, improve the fatigue resistance of workpiece, increase it and
Adhesive force between coating extends the durability of film, is conducive to the levelling and decoration of coating, the ball milling in the step S4
Broken mixing is carried out using horizontal ball mill, the revolving speed of mill tube is 50r/min, and charging volume is 110L, in the step S5
Plasma generator uses laminar-flow type plasmatron, and the state of the plasma jet of laminar-flow type plasmatron is from layer
Stream is gradually transitions turbulent flow, and in the process, while adhesion strength is decreased obviously, the discreteness of data is also increasing, most
The repeatability of coating performance is caused to degenerate afterwards, the oxidation spray coating on side surface, dielectric strength 1.5kV prevents from reacting
There is electric arc divided on inverted conductive wall and on surface after cooling inside device, to reduce the consumption of coolant liquid, protects
More evenly, the powder feeder in the step S8 is using tall board-like powder feeder, powder feeding for thermo parameters method in card reactor section
Powder must be sent to flame core in journey, and powder can be made to obtain optimal heating and speed, spray workpiece fabrication in the step S11
In, the temperature for controlling entire workpiece heats up, and warming temperature is no more than 200 DEG C, enters auxiliary quenching using blower, side
Just the temperature of workpiece is controlled, is needed in the spraying process of the step S11 and the cooling procedure of step S12 in the room of dust removal by ventilation
The adsorbing powder dust of generation is filtered by filter screen and acticarbon, guarantees working environment by interior progress.
Embodiment 3
A kind of plasma ashing tungsten spraying production technology, specific step is as follows for plasma ashing tungsten spraying production technology:
S1: workpiece pretreatment will need the workpiece that sprays to be drawn as CAD diagram paper matrix formula, according to drawing pattern to needing on workpiece
Area to be protected is protected；
S2: blasting treatment will need the workpiece sprayed to use compressed air for power, to form high velocity spray beam for material spray
High speed, which is ejected into, need to handle workpiece surface, and the appearance of workpiece surface or shape is made to change；
S3: sanding and polishing processing send the workpiece that blasting treatment in S2 is completed to progress sanding and polishing processing on polishing machine,
The revolving speed of polishing machine is in 2500 r/min, machining accuracy: surface roughness Ra≤0.25 μm；
S4: tungsten carbide raw material is crushed and is uniformly mixed by ball-milling technology by tungsten carbide processing；
S5: thermal response will obtain broken raw material and carry out thermal response in the ion stream of plasma generator to obtain in S4
Mixture of powders；
S6: the mixture of powders in S5 is put into the bronze drum of centrifugal planetary grinder by mechanical enhancer, with diameter 8mm
Copper ball the grinding of 5min is carried out to powder, wherein copper ball weight 200g, powder are added at one time weight no more than 10g, obtain powder
Expect spare；
S7: N is selected in equipment adjustment2Gas is adjusted as plasma gas, gas flow 2000L/h, pressure 0.8MPa
Whole arc power, so that arc temperature control is at 2900 DEG C；
S8: powder supply will obtain powder by powder feeder and supply powder to spray gun in S6；
S9: spray distance and angle of spray adjust the nozzle face of spray gun to the linear distance of workpiece surface, and spray distance exists
150mm, angle of spray are 80 °；
S10: workpiece the pre-heat treatment preheats the workpiece in S3, and preheating temperature is at 150 DEG C；
S11: spraying sprays the workpiece in S10 using spray gun, and spray gun movement speed is the 30%- of pressure lid spot
50%, for thickness in 0.15 mm shallow layer below, the coating layer thickness sprayed every time does not exceed 0.02 mm, and spray gun is mobile
Speed also has an impact to the temperature rise of workpiece, for Bu Shi matrix local temperature rise is excessively high and causes thermal deformation or thermal stress excessive, can mention
The method of high workpiece linear velocity accelerates the movement speed of spray gun；
S12: workpiece cooling packing, the workpiece that spraying is completed carry out natural cooling, carry out packaging and storing after the completion of cooling.
Material spray in the step S2 can be one of copper ore, quartz sand, diamond dust, iron sand and sea sand, described
Workpiece makes the surface of workpiece obtain certain cleaning by impact and shear action of the blasting treatment to workpiece surface in step S2
Degree and different roughness, improve the mechanical performance of workpiece surface, improve the fatigue resistance of workpiece, increase it and
Adhesive force between coating extends the durability of film, is conducive to the levelling and decoration of coating, the ball milling in the step S4
Broken mixing is carried out using horizontal ball mill, the revolving speed of mill tube is 55r/min, and charging volume is 200L, in the step S5
Plasma generator uses laminar-flow type plasmatron, and the state of the plasma jet of laminar-flow type plasmatron is from layer
Stream is gradually transitions turbulent flow, and in the process, while adhesion strength is decreased obviously, the discreteness of data is also increasing, most
The repeatability of coating performance is caused to degenerate afterwards, the oxidation spray coating on side surface, dielectric strength 1.5kV prevents from reacting
There is electric arc divided on inverted conductive wall and on surface after cooling inside device, to reduce the consumption of coolant liquid, protects
More evenly, the powder feeder in the step S8 is using tall board-like powder feeder, powder feeding for thermo parameters method in card reactor section
Powder must be sent to flame core in journey, and powder can be made to obtain optimal heating and speed, spray workpiece fabrication in the step S11
In, the temperature for controlling entire workpiece heats up, and warming temperature is no more than 200 DEG C, enters auxiliary quenching using blower, side
Just the temperature of workpiece is controlled, is needed in the spraying process of the step S11 and the cooling procedure of step S12 in the room of dust removal by ventilation
The adsorbing powder dust of generation is filtered by filter screen and acticarbon, guarantees working environment by interior progress.
The plasma ashing tungsten of strict control of the present invention sprays production technology, passes through strict control plasma spray coating process number
According to the coating obtained by plasma spraying is flat and smooth, consistency is high, and powder deposition is very high, base in spraying process
Body is not charged, non-fusible, and matrix and spray gun relative moving speed are fast, so that matrix does not change.It will not be because of heated
And the shape and performance of matrix are impacted, working gas is inert gas, and protecting matrix and powder not will receive oxidation,
Impurity is few in coating, easy to operate, and cost of equipment maintenance is low, and regulation performance is good, and tungsten-carbide powder passes through at mechanical enhancer
Reason, spraying penetration work well, and in the indoor progress of dust removal by ventilation in spraying and cooling procedure, can be effectively by work
The adsorbing powder dust filtering generated in the process, guarantees working environment, is suitble to be widely popularized.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (6)
1. a kind of plasma ashing tungsten sprays production technology, it is characterised in that: the plasma ashing tungsten spraying production technology is specific
Steps are as follows:
S1: workpiece pretreatment will need the workpiece that sprays to be drawn as CAD diagram paper matrix formula, according to drawing pattern to needing to protect on workpiece
It protects in the region of shield；
S2: blasting treatment will need the workpiece sprayed to use compressed air for power, to form high velocity spray beam for material spray high speed
Workpiece surface need to be handled by being ejected into, and the appearance of workpiece surface or shape is made to change；
S3: sanding and polishing processing send the workpiece that blasting treatment in S2 is completed to progress sanding and polishing processing, polishing on polishing machine
The revolving speed of machine is in 1500-2500 r/min, machining accuracy: surface roughness Ra≤0.25 μm；
S4: tungsten carbide raw material is crushed and is uniformly mixed by ball-milling technology by tungsten carbide processing；
S5: thermal response will obtain broken raw material and carry out thermal response in the ion stream of plasma generator to obtain powder in S4
Mixture；
S6: the mixture of powders in S5 is put into the bronze drum of centrifugal planetary grinder by mechanical enhancer, with the copper of diameter 8mm
Ball carries out the grinding of 5min to powder, wherein copper ball weight 200g, and powder is added at one time weight no more than 10g, and it is standby to obtain powder
With；
S7: N is selected in equipment adjustment2Gas adjusts electric arc as plasma gas, gas flow 2000L/h, pressure 0.8MPa
Power, so that arc temperature control is at 2870 DEG C -2900 DEG C；
S8: powder supply will obtain powder by powder feeder and supply powder to spray gun in S6；
S9: spray distance and angle of spray adjust the nozzle face of spray gun to the linear distance of workpiece surface, and spray distance is in 70-
150mm, angle of spray are 60 ° -80 °；
S10: workpiece the pre-heat treatment preheats the workpiece in S3, and preheating temperature is between 80 DEG C -150 DEG C；
S11: spraying sprays the workpiece in S10 using spray gun, and spray gun movement speed is the 30%-50% of pressure lid spot,
For thickness in 0.15 mm shallow layer below, the coating layer thickness sprayed every time does not exceed 0.02 mm, spray gun movement speed
Also have an impact to the temperature rise of workpiece, for Bu Shi matrix local temperature rise is excessively high and causes thermal deformation or thermal stress excessive, work can be improved
The method of part linear velocity accelerates the movement speed of spray gun；
S12: workpiece cooling packing, the workpiece that spraying is completed carry out natural cooling, carry out packaging and storing after the completion of cooling.
2. a kind of plasma ashing tungsten according to claim 1 sprays production technology, it is characterised in that: in the step S2
Material spray can be one of for copper ore, quartz sand, diamond dust, iron sand and sea sand.
3. a kind of plasma ashing tungsten according to claim 1 sprays production technology, it is characterised in that: in the step S4
Ball milling broken mixing is carried out using horizontal ball mill, the revolving speed of mill tube is 45-55r/min, and charging volume is 20L-200L.
4. a kind of plasma ashing tungsten according to claim 1 sprays production technology, it is characterised in that: in the step S8
Powder feeder using tall board-like powder feeder, powder must be sent to flame core during powder feeding, so that powder obtains optimal heating
And speed.
5. a kind of plasma ashing tungsten according to claim 1 sprays production technology, it is characterised in that: the step S11
In middle spraying workpiece fabrication, the temperature for controlling entire workpiece heats up, and warming temperature is no more than 200 DEG C, is entered using blower
Quenching is assisted, so that facilitating the temperature of control workpiece.
6. a kind of plasma ashing tungsten according to claim 1 sprays production technology, it is characterised in that: the step S11
Spraying process and step S12 cooling procedure in need indoor progress in dust removal by ventilation, pass through filter screen and active carbon inhaled
The attached dose of adsorbing powder dust by generation filters, so that guaranteeing working environment.
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| CN111957542A (en) * | 2020-08-11 | 2020-11-20 | 江苏万源新材料股份有限公司 | Coating aluminum foil with moisturizing function and preparation process thereof |
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| CN102828137A (en) * | 2012-08-31 | 2012-12-19 | 华南理工大学 | High-temperature alloy surface nanometer composite coating and preparation method thereof |
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