CN106402420B - Wear-resisting and erosion resistant ball valve core and its manufacturing method - Google Patents
Wear-resisting and erosion resistant ball valve core and its manufacturing method Download PDFInfo
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- CN106402420B CN106402420B CN201610883015.6A CN201610883015A CN106402420B CN 106402420 B CN106402420 B CN 106402420B CN 201610883015 A CN201610883015 A CN 201610883015A CN 106402420 B CN106402420 B CN 106402420B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
- F16K5/0605—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor with particular plug arrangements, e.g. particular shape or built-in means
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- 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
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- 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
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
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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
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/082—Coating starting from inorganic powder by application of heat or pressure and heat without intermediate formation of a liquid in the layer
- C23C24/085—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
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- General Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Chemical Kinetics & Catalysis (AREA)
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Abstract
The invention discloses a kind of wear-resisting and erosion resistant ball valve cores, comprising: metal body is spaced apart on spherical outer surface and is equipped with several incised grooves；Tungsten carbide of nickel-base coating, uniform fold the metal body spherical outer surface, the tungsten carbide of nickel-base coating with a thickness of 3mm~6mm；Wherein, the groove is filled up completely by the tungsten carbide of nickel-base coating, includes the tungsten carbide of 48.83wt%~73.13wt%, the nickel of 26.87wt%~51.17wt%, the chromium of 1.19wt%~3.66wt%, the boron of 0.59wt%~2.19wt%, the silicon of 0.91wt%~2.56wt% and the iron of 0.59wt%~2.19wt% in the tungsten carbide of nickel-base coating.The present invention makes tungsten carbide flexible cloth form tungsten carbide of nickel-base coating in metal ball-valve outer surface using vacuum brazing technique, then wear-resisting and erosion resistance ball valve core is finally made using simple grinding in removing spherical ceramic mold, and obtained ball valve core is thick with excellent wear-resisting and erosion resistance comprehensive performance, wear-resistant coating, easy to process, manufacturing cost is low.
Description
Technical field
The present invention relates to valve technology fields, it is more particularly related to a kind of wear-resisting and erosion resistant ball valve
Core and its manufacturing method.
Background technique
Metal hard-sealing ball valve material is generally carbon steel or stainless steel, due to the limitation of material itself, there is strong abrasion
It usually can cause to fail because of abrasion and erosion with ball valve core under strong erosion operating condition.Spool is carried out using surface strengthening technology
Surface is modified, improves spool erosive wear resistance, is the important method for improving metal hard-sealing ball valve service life and reliability.
But traditional wear-resistant coating process mainly includes surfacing, built-up welding, thermal spraying painting.Surfacing institute suitable material range is relatively narrow,
Basis material deformation is serious, and the ingredient and primitive component of spray-welding coating have different.The high temperature of bead-welding technology part will lead to by
Hot uneven, temperature gradient is big, easily causes larger welding residual stress and deformation, and welding coating can Local Cracking even formation
Through-wall crack leads to coating shedding.For the coating layer thickness of thermal spraying in 0.2~0.6mm, coating is lower with basal body binding force, hole
Rate is higher, and the thermal efficiency is low, and operating environment is poor.As it can be seen that traditional wear-resistant coating technology urgently improve it is high performance to prepare
Wear-resisting, erosion resistance coating ball valve core.
Summary of the invention
It is an object of the invention to solve at least the above problems, and provide the advantages of at least will be described later.
It is a still further object of the present invention to provide a kind of wear-resisting and erosion resistant ball valve core and its manufacturing methods, using true
Empty soldering processes make tungsten carbide flexible cloth form tungsten carbide of nickel-base coating in metal ball-valve outer surface, then remove spherical ceramic mould
Using simple grinding wear-resisting and erosion resistance ball valve core is finally made in tool, to improve the service life of ball valve and reliable
Property.
In order to realize these purposes and other advantages according to the present invention, a kind of wear-resisting and erosion resistant ball valve is provided
Core, comprising:
Metal body is spaced apart on spherical outer surface and is equipped with several incised grooves；
Tungsten carbide of nickel-base coating, spherical outer surface of the uniform fold in the metal body, the tungsten carbide of nickel-base painting
Layer with a thickness of 3mm~6mm；
Wherein, the groove is filled up completely by the tungsten carbide of nickel-base coating, includes in the tungsten carbide of nickel-base coating
The tungsten carbide of 48.83wt%~73.13wt%, the nickel of 26.87wt%~51.17wt%, 1.19wt%~3.66wt% chromium,
The iron of the boron of 0.59wt%~2.19wt%, the silicon of 0.91wt%~2.56wt% and 0.59wt%~2.19wt%.
Preferably, the tungsten carbide of nickel-base coating is by the tungsten-carbide powder of 59.8wt%, the nickel powder of 33.77wt%, 2.41wt%
Chromium powder, 1.21wt% boron powder, the silicon powder of 1.6wt% and the iron powder of 1.21wt% be made, the thickness of the tungsten carbide of nickel-base coating
Degree is 5mm.
Preferably, the groove is square sawtooth wave structure, and adjacent saw-tooth spacing is 2.5mm~3.0mm, adjacent two institutes
The spacing for stating groove is 1.5mm~2.7mm, and the width of the groove is 0.2mm~0.8mm, and the depth of the groove is 0.2mm
~0.7mm.
Preferably, several grooves are equidistantly arranged in parallel, and groove described in each is the closed sawtooth wave of head and the tail
The through-hole of structure, the groove and the metal body is arranged concentrically.
Preferably, the width of the groove is 0.5mm, and the adjacent saw-tooth spacing 2.8mm of the groove, adjacent two parallel
The spacing of groove is 2mm, and the depth of groove is 0.5mm.
Preferably, several protrusions are provided on the groove inner wall, the height of the protrusion is in 0.03mm~0.15mm.
Preferably, comprising the following steps:
Step 1: weigh by mass percentage tungsten-carbide powder 48.83wt%~73.13wt%, nickel powder 23.59wt%~
40.57wt%, chromium powder 1.19wt%~3.66wt%, boron powder 0.59wt%~2.19wt%, silicon powder 0.91wt%~2.56wt%, iron powder
Each raw material is uniformly mixed by 0.59wt%~2.19wt%；
Step 2: weighing polytetrafluorethylepowder powder by 1.39wt%~2.08wt% of raw material mixed powder end gross mass is added original
Expect to be uniformly mixed in mixed-powder, mixed powder is pressed into tungsten carbide flexible cloth；
Step 3: the metal body surface of spool is carried out sandblasting and goes oil processing, and add at metal body surface interval
Work goes out several incised grooves；
Step 4: metal body is placed concentrically in spherical die, outside the spherical die internal chamber wall and metal body
The gap on surface is 6mm；
Step 5: the square that the tungsten carbide flexible cloth is cut into 2mm × 2mm is filled in the spherical die and metal
In the gap of ontology and it is compacted；
Step 6: will be filled with the spherical die of tungsten carbide flexible cloth and metal body is placed into vacuum brazing furnace
Sintering, obtained surface is covered with the ball valve core of tungsten carbide of nickel-base coating；Wherein, the vacuum degree in soldering oven is at least 10-3Pa
Grade, sintering curre are as follows: and then be warming up to 200 DEG C~400 DEG C with 5 DEG C/min~10 DEG C/min of speed and keep 0.5~1
Hour, then be warming up to 1000 DEG C~1100 DEG C with 10 DEG C/min~15 DEG C/min of speed and keep the temperature 0.5~1 hour, then again
Room temperature is cooled to 10 DEG C/min~20 DEG C/min of speed；
Step 7: tungsten carbide of nickel-base coating is carried out grinding.
Preferably, 59.8wt% containing tungsten-carbide powder, nickel powder 33.77wt%, chromium powder 2.41wt%, boron in raw material mixed powder end
Powder 1.21wt%, silicon powder 1.6wt% and iron powder 1.21wt%, the additive amount of the polytetrafluorethylepowder powder are total mass of raw material
1.73wt%, the tungsten-carbide powder can cross 240 meshes.
Preferably, the groove is square sawtooth wave structure, and adjacent saw-tooth spacing is 2.5mm~3.0mm, adjacent two institutes
The spacing for stating groove is 1.5mm~2.7mm, and the width of the groove is 0.2mm~0.8mm, and the depth of the groove is 0.2mm
~0.7mm.
Preferably, the spherical die ceramic mold assembled by the upper half and lower half, lower half be it is bowl-shape, on
Half portion is bottomless bowl shape.The present invention is include at least the following beneficial effects:
1, obtained wear-resisting and erosion resistance ball valve core prepared by the present invention, tungsten carbide of nickel-base coating with a thickness of 5mm, far
The thickness of super 0.2~0.3mm of wear-resistant coating by supersonic spray coating, and tungsten carbide particle distribution is equal in tungsten carbide of nickel-base coating
Even, coat inside zero defect, surface flawless, be combined into one with insert body structure well；
2, the resistance to erosion resistant excellent comprehensive mechanical property of adjustment, wherein abrasion resistance properties are 304 stainless steel ball valve cores
400 times, be 2 times of thermal spraying on surface Ni55 material, and erosive wear resistance is that surface passes through the 1.5 of supersonic spray coating tungsten carbide coating
Times；
3, coating and insert body are combined into metallurgical bonding, and bond strength reaches 375MPa, and metal body and Ni-based
Square incised groove is machined on the interface of tungsten carbide coating, to enhance the combination of tungsten carbide of nickel-base coating and metal body
Power, coating are not easily to fall off with insert body；
4, obtained wear-resisting and erosion resistance ball valve core processing technology prepared by the present invention is simple, equipment investment is low, manufacture
It is at low cost.
Further advantage, target and feature of the invention will be partially reflected by the following instructions, and part will also be by this
The research and practice of invention and be understood by the person skilled in the art.
Detailed description of the invention
Fig. 1 is metal body side view；
Fig. 2 is the cross-sectional view of spherical die and metal body filled with tungsten carbide flexible cloth；
Fig. 3 is the electron microscope in tungsten carbide of nickel-base coating cross section；
Fig. 4 is wear-resisting and erosion resistance ball valve core manufacturing method flow diagram；
In the figures above: 1: the spherical die upper half, 2: spherical die lower half, 3, tungsten carbide flexible cloth: 4, metal sheet
Body, 41, groove.
Specific embodiment
Present invention will be described in further detail below with reference to the accompanying drawings, to enable those skilled in the art referring to specification text
Word can be implemented accordingly.
It should be appreciated that such as " having ", "comprising" and " comprising " term used herein do not allot one or more
The presence or addition of a other elements or combinations thereof.
As shown in figs. 1 and 3, in a kind of embodiment, wear-resisting and erosion resistant ball valve core includes metal body and Ni-based carbon
Change tungsten coating, in which:
Metal body 4 is spaced apart on spherical outer surface and is equipped with several incised grooves 41, the axis of the metal body
To the through-hole offered for water conservancy diversion, groove 41 described in the present embodiment is square sawtooth wave structure, it is to be appreciated that groove
It can be sawtooth wave structure of other shapes, such as streamlined, fish scale type etc., as shown in Figure 1, the bending angle of same groove is
90 °, adjacent saw-tooth spacing L2 is 2.5mm~3.0mm, preferably 2.8mm, and the spacing L3 of adjacent two grooves is
1.5mm~2.7mm, preferably 2mm, the width L1 of the groove are 0.2mm~0.8mm, preferably 0.5mm, described recessed
The depth of slot is 0.2mm~0.7mm, preferably 0.5mm；
Tungsten carbide of nickel-base coating, uniform fold the metal body 4 spherical outer surface, and it is the groove is complete
Filling, the erosion resistant excellent comprehensive mechanical property of resistance to adjustment of tungsten carbide of nickel-base coating, wherein abrasion resistance properties are 304 stainless steels
400 times of ball valve core, are 2 times of thermal spraying on surface Ni55 material, and erosive wear resistance is that surface is carbonized by supersonic spray coating
1.5 times of tungsten coating；The tungsten carbide of nickel-base coating with a thickness of 3mm~6mm, preferably tungsten carbide of nickel-base coating with a thickness of
5mm, the thickness of remote super 0.2~0.3mm of wear-resistant coating by supersonic spray coating, and tungsten carbide particle in tungsten carbide of nickel-base coating
It is evenly distributed, as shown in figure 3, partial size is in um grade, coating consistency is high, coat inside zero defect, surface flawless, the porosity
It is comprehensive to embody excellent wear-resisting and erosion resistance so that the structure that is combined into one well with insert body, not easily to fall off for very little
Performance, and wear-resistant coating is thick, easy to process, manufacturing cost is low, effectively increases the service life and reliability of ball valve.
Square incised groove is formed using electrical discharge machining on the interface of metal body and tungsten carbide of nickel-base coating, is increased
Add the contact area of tungsten carbide coating and metal body, to enhance the binding force of tungsten carbide coating and metal body, meanwhile, it applies
The metallurgical bonding that is combined into of layer and insert body, bond strength reaches 375MPa, in conjunction with metal body and tungsten carbide of nickel-base coating
Square incised groove on interface, further enhances the binding force of tungsten carbide of nickel-base coating and metal body, coating and spool
Ontology is not easily to fall off.
In another embodiment, the tungsten carbide of nickel-base coating by 48.83wt%~73.13wt% tungsten carbide,
The nickel of 26.87wt%~51.17wt%, the chromium of 1.19wt%~3.66wt%, the boron of 0.59wt%~2.19wt%, 0.91wt%~
The silicon of 2.56wt% and the iron of 0.59wt%~2.19wt% are made, in the present embodiment, specifically, the tungsten carbide of nickel-base coating
By the tungsten-carbide powder of 59.8wt%, the nickel powder of 33.77wt%, the chromium powder of 2.41wt%, the boron powder of 1.21wt%, 1.6wt% silicon powder
And the iron powder of 1.21wt% is made, after molding, the tungsten carbide of nickel-base coating with a thickness of 5mm, the Ni-based carbon of the raw material proportioning
Change the wear-resisting and erosive wear resistance that tungsten coating has superhigh intensity, to be modified to spool face, surpasses so that spool has
High wear-resisting and erosive wear resistance, to enhance service life and reliability.
In another embodiment, several grooves are equidistantly arranged in parallel, as shown in Figure 1, groove described in each
For the closed sawtooth wave structure of head and the tail, and the through-hole of the groove and the metal body is arranged concentrically, such as terrestrial latitude line one
Sample is uniformly provided with metal body spherical shape in appearance, increases the area coverage of groove, at the same when the tungsten carbide of nickel-base coating with
When metal body combines, the tungsten carbide of nickel-base coating has more contact surfaces by groove and metal body, to improve combination
Intensity, meanwhile, each groove is evenly arranged in spherome surface, and the binding force of the tungsten carbide of nickel-base coating and metal body is more
Balanced is arranged on metal body, so that the tungsten carbide of nickel-base coating and the balanced combination of metal body, avoid the occurrence of office
Portion falls off.
In another embodiment, several protrusions are provided on the groove inner wall, that is, in fluting, as far as possible by cell wall
It is split into crude face, so that being covered on groove face has protrusion, the height of the protrusion is distributed in 0.03mm~0.15mm, described Ni-based
Tungsten carbide coating is completely filled in groove, to further increase the binding force of the tungsten carbide of nickel-base coating and groove, because
Cell wall is more smooth, and the binding force of the tungsten carbide of nickel-base coating and groove is smaller, or is easy entirety and falls off, and remains on cell wall
Protrusion, then very good solution this problem, improves bond strength.
A kind of wear-resisting and erosion resistance ball valve core manufacturing method, as shown in Figure 4, comprising the following steps:
Step 1: weigh by mass percentage tungsten-carbide powder 48.83wt%~73.13wt%, nickel powder 23.59wt%~
40.57wt%, chromium powder 1.19wt%~3.66wt%, boron powder 0.59wt%~2.19wt%, silicon powder 0.91wt%~2.56wt%, iron powder
0.59wt%~2.19wt%, the tungsten-carbide powder can cross 240 meshes, and in the present embodiment, raw material mixed powder contains tungsten carbide in end
Powder 59.8wt%, nickel powder 33.77wt%, chromium powder 2.41wt%, boron powder 1.21wt%, silicon powder 1.6wt% and iron powder 1.21wt%, will
Each raw material is uniformly mixed stand-by；
Step 2: being added into the polytetrafluoroethylene powder for accounting for raw material mixed powder end gross mass 1.73% into raw material mixed powder end
Powder after mixing is obtained tungsten carbide flexible cloth 3 with roll squeezer roll-forming by end；
Step 3: the metal body surface of spool is carried out sandblasting and goes oil processing, then pass through the side of electrical discharge machining
Method processes several grooves in metal body outer surface, and the width of groove is 0.5mm, and adjacent saw-tooth spacing is 2.8mm,
The spacing of adjacent two parallel grooves is 2mm, depth of groove 0.5mm；
Step 4: being placed concentrically in spherical die center for after metal body surface cleaning, the through-hole of metal body is longitudinal
Setting, the spherical die ceramic mold assembled by the upper half 1 and lower half 2, as shown in Fig. 2, lower half be it is bowl-shape,
The upper half is bottomless bowl shape, and the two carries out assembly by the locating slot on contact surface, metal body is equidistantly coated on mould
Tool is internal, and the gap of the spherical die internal chamber wall and metal body outer surface is 6mm everywhere, in other words the inside radius of mold
It is 1mm bigger than the radius of a ball of metal body；
Step 5: the square that the tungsten carbide flexible cloth 3 is cut into 2mm × 2mm is filled in the spherical die and gold
Belong in the gap of ontology and be compacted, specifically, the upper half 1 and lower half 2 are separated, is placed with a circle in lower half bottom periphery
The tungsten carbide flexible cloth of 6mm wide is used for the positioning of metal body, and 4 through-hole direction of metal body is vertically disposed in lower half bottom
Center, bottom outer surface is bonded with the tungsten carbide flexible cloth for being placed on lower half bottom in advance, so that metal body and mould
The distance between tool internal chamber wall remains 6mm, and tungsten carbide flexible cloth is then inserted into gap, is compacted when filling out, until lower half
Portion, which is filled up completely, to be finished, and the upper half is then carried out assembly along the locating slot on contact surface, continues to fill carbonization into gap
Tungsten carbide flexible cloth is finally compacted in gap with tool, is subtracted until tungsten carbide flexible cloth is filled up completely gap by tungsten flexible cloth
Gap in small―gap suture, so that tungsten carbide flexible cloth is evenly arranged in metal body periphery；
Step 6: will be filled with the spherical die of tungsten carbide flexible cloth and metal body is put into vacuum brazing furnace
Sintering, first will be evacuated to 10 in furnace-3Pa is sintered obtained surface and is covered with tungsten carbide of nickel-base coating ball valve core；Wherein, it is burning
During knot, the vacuum degree in soldering oven is at least 10-3Pa grade, specific sintering curre are as follows: be warming up to 5 DEG C/min of speed
300 DEG C and holding 1 hour, then be warming up to 1050 DEG C with 10 DEG C/min and keep the temperature 1 hour, then cooled down again with 15 DEG C/min of speed
To room temperature；
Step 7: tungsten carbide of nickel-base coating is carried out grinding, wear-resisting and erosion resistance ball valve core is made.
In sintering process, polytetrafluoroethylene powder volatilization, coating shrinkage is fine and close, and after sintering, the tungsten carbide flexible cloth of 6mm is shunk
To the tungsten carbide of nickel-base coating of 5mm thickness, uniform fold is and not easily to fall off in the outer surface of metal body, can from Fig. 3
Out, tungsten carbide of nickel-base coating consistency is high, and tungsten carbide particle is evenly distributed in tungsten carbide of nickel-base coating, partial size in um grade,
Coat inside zero defect, surface flawless, porosity very little, the thermal efficiency is higher, and the gap between each tungsten carbide flexible cloth is received
Contracting is fine and close, is combined into one well with insert body structure with metal body, not easy to crack and fall off, and embodies excellent resistance to
Mill and erosion resistance comprehensive performance, and wear-resistant coating is thick, easy to process, manufacturing cost is low, effectively increases the service life of ball valve
And reliability.
The wear-resisting and erosion resistance ball valve core any surface finish of preparation, no significant defect, with a thickness of 5mm.Coating cross section
As shown in figure 3, tungsten carbide particle is evenly distributed in nickel-base material, no particle agglomeration and stomata electromicroscopic photograph occur.Preparation
Wear-resisting and erosion resistance ball valve core shows the excellent erosion resistant comprehensive mechanical performance of resistance to adjustment, and wherein abrasion resistance properties are
400 times of 304 stainless steel ball valve cores are 2 times of thermal spraying on surface Ni55 material.Erosive wear resistance is that surface passes through supersonic speed
1.5 times of sprayed wc coating.As it can be seen that wear-resisting and erosion resistance ball valve core of the invention greatly improved ball valve abrasion and
The life and reliability being on active service under erosion operating condition.
From the above mentioned, wear-resisting and erosion resistance ball valve core ontology of the invention is metal, and outer metallic surface is Ni-based carbonization
It is machined with square incised groove on the interface of tungsten coating, metal body and tungsten carbide of nickel-base coating, to enhance tungsten carbide of nickel-base
The binding force of coating and metal body.The wear-resisting and erosion resistance ball valve core is by a dismountable spherical ceramic mold cladding
Outside metal ball-valve spool, tungsten carbide flexible cloth is filled in the gap of ceramic mold and metal ball-valve spool, using vacuum
Soldering processes make tungsten carbide flexible cloth form tungsten carbide of nickel-base coating in metal ball-valve outer surface, then remove spherical ceramic mold
Wear-resisting and erosion resistance ball valve core is finally made using simple grinding.Provided by the invention wear-resisting and erosion resistance ball valve
Spool is thick with excellent wear-resisting and erosion resistance comprehensive performance, wear-resistant coating, easy to process, manufacturing cost is low.
Obtained wear-resisting and erosion resistance ball valve core prepared by the present invention, tungsten carbide particle distribution in tungsten carbide of nickel-base coating
Uniformly, coat inside zero defect, surface flawless, be combined into one with insert body structure well, and bond strength reaches
375MPa, and square incised groove is machined on the interface of metal body and tungsten carbide of nickel-base coating, to enhance Ni-based carbonization
The binding force of tungsten coating and metal body, coating are not easily to fall off with insert body；Further, it is prepared by the present invention obtain it is resistance to
It grinds and erosion resistance ball valve core processing technology is simple, equipment investment is low, manufacturing cost is low, it is easy to spread.
Although the embodiments of the present invention have been disclosed as above, but its is not only in the description and the implementation listed
With it can be fully applied to various fields suitable for the present invention, for those skilled in the art, can be easily
Realize other modification, therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is simultaneously unlimited
In specific details and legend shown and described herein.
Claims (8)
1. a kind of wear-resisting and erosion resistant ball valve core characterized by comprising
Metal body is spaced apart on spherical outer surface and is equipped with several circumferential indention grooves；The groove is square saw
Tooth wave structure, adjacent saw-tooth spacing are 2.5mm~3.0mm, and the spacing of adjacent two grooves is 1.5mm~2.7mm, described
The width of groove is 0.2mm~0.8mm, and the depth of the groove is 0.2mm~0.7mm, and several grooves are equidistantly put down
Row is arranged, and groove described in each is the closed sawtooth wave structure of head and the tail, and the through-hole of the groove and the metal body is concentric
Setting；
Tungsten carbide of nickel-base coating, uniform fold the metal body spherical outer surface, the tungsten carbide of nickel-base coating
With a thickness of 3mm~6mm；
Wherein, the groove is filled up completely by the tungsten carbide of nickel-base coating, includes in the tungsten carbide of nickel-base coating
The tungsten carbide of 48.83wt%~73.13wt%, the nickel of 26.87wt%~51.17wt%, 1.19wt%~3.66wt% chromium,
The iron of the boron of 0.59wt%~2.19wt%, the silicon of 0.91wt%~2.56wt% and 0.59wt%~2.19wt%.
2. as described in claim 1 wear-resisting and erosion resistant ball valve core, which is characterized in that the tungsten carbide of nickel-base coating by
The tungsten-carbide powder of 59.8wt%, the nickel powder of 33.77wt%, the chromium powder of 2.41wt%, the boron powder of 1.21wt%, 1.6wt%
The iron powder of silicon powder and 1.21wt% are made, the tungsten carbide of nickel-base coating with a thickness of 5mm.
3. as described in claim 1 wear-resisting and erosion resistant ball valve core, which is characterized in that the width of the groove is
The spacing of 0.5mm, the adjacent saw-tooth spacing 2.8mm of the groove, adjacent two parallel grooves are 2mm, and the depth of groove is
0.5mm。
4. wear-resisting and erosion resistant ball valve core as claimed in claim 3, which is characterized in that be provided on the groove inner wall
Several protrusions, the height of the protrusion is in 0.03mm~0.15mm.
5. a kind of wear-resisting and erosion resistance ball valve core manufacturing method, which comprises the following steps:
Step 1: weigh by mass percentage tungsten-carbide powder 48.83wt%~73.13wt%, nickel powder 23.59wt%~
40.57wt%, chromium powder 1.19wt%~3.66wt%, boron powder 0.59wt%~2.19wt%, silicon powder 0.91wt%~
2.56wt%, iron powder 0.59wt%~2.19wt%, each raw material is uniformly mixed；
Step 2: weighing polytetrafluorethylepowder powder by 1.39wt%~2.08wt% of raw material mixed powder end gross mass is added raw material
It is uniformly mixed in mixed-powder, mixed powder is pressed into tungsten carbide flexible cloth；
Step 3: the metal body surface of spool is carried out sandblasting and goes oil processing, and processed at metal body surface interval
Several circumferential indention grooves；
Step 4: metal body is placed concentrically in spherical die, the spherical die internal chamber wall and metal body outer surface
Gap be 6mm；
Step 5: the square that the tungsten carbide flexible cloth is cut into 2mm × 2mm is filled in the spherical die and metal body
Gap in and be compacted；
Step 6: will be filled with the spherical die of tungsten carbide flexible cloth and metal body is placed into vacuum brazing furnace and burns
Knot, obtained surface is covered with the ball valve core of tungsten carbide of nickel-base coating；Wherein, the vacuum degree in soldering oven is at least 10-3Pa etc.
Grade, sintering curre are as follows: and then be warming up to 200 DEG C~400 DEG C with 5 DEG C/min~10 DEG C/min of speed and keep 0.5~1 small
When, then with 10 DEG C/min~15 DEG C/min of speed be warming up to 1000 DEG C~1100 DEG C keep the temperature 0.5~1 hour, then again with
10 DEG C/min~20 DEG C/min of speed is cooled to room temperature；
Step 7: tungsten carbide of nickel-base coating is carried out grinding.
6. wear-resisting and erosion resistance ball valve core manufacturing method as claimed in claim 5, which is characterized in that raw material mixed powder end
In 59.8wt% containing tungsten-carbide powder, nickel powder 33.77wt%, chromium powder 2.41wt%, boron powder 1.21wt%, silicon powder 1.6wt% with
And iron powder 1.21wt%, the additive amount of the polytetrafluorethylepowder powder are the 1.73wt% of total mass of raw material, the tungsten carbide powder
End can cross 240 meshes.
7. wear-resisting and erosion resistance ball valve core manufacturing method as claimed in claim 5, which is characterized in that the groove is positive
Square sawtooth wave structure, adjacent saw-tooth spacing are 2.5mm~3.0mm, and the spacing of adjacent two grooves is 1.5mm~2.7mm,
The width of the groove is 0.2mm~0.8mm, and the depth of the groove is 0.2mm~0.7mm.
8. wear-resisting and erosion resistance ball valve core manufacturing method as claimed in claim 5, which is characterized in that the spherical die
By the assembled ceramic mold in the upper half and lower half, lower half be it is bowl-shape, the upper half be bottomless bowl shape.
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| CN107130204A (en) * | 2017-05-22 | 2017-09-05 | 河南中原吉凯恩气缸套有限公司 | A kind of wear-resistant coating cylinder jacket and its preparation technology |
| CN107237899A (en) * | 2017-07-01 | 2017-10-10 | 宁波华成阀门有限公司 | A kind of high-wear-resistance long-service-life ball valve and its manufacture method |
| CN114349525B (en) * | 2021-12-23 | 2023-03-24 | 西安鑫垚陶瓷复合材料有限公司 | Ceramic matrix composite turbine outer ring with abradable coating and preparation method thereof |
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| US5593726A (en) * | 1990-05-10 | 1997-01-14 | Apv Corporation Limited | Hot isostatic pressing process for applying wear and corrosion resistant coatings |
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