CN106402420A - Wear-resistant and washout-resistant ball valve core and manufacturing method thereof - Google Patents
Wear-resistant and washout-resistant ball valve core and manufacturing method thereof Download PDFInfo
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- CN106402420A CN106402420A CN201610883015.6A CN201610883015A CN106402420A CN 106402420 A CN106402420 A CN 106402420A CN 201610883015 A CN201610883015 A CN 201610883015A CN 106402420 A CN106402420 A CN 106402420A
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- tungsten carbide
- nickel
- powder
- wear
- ball valve
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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
-
- 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
-
- 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
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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
-
- 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
Abstract
The invention discloses a wear-resistant and washout-resistant ball valve core. The wear-resistant and washout-resistant ball valve core comprises a metal body and a nickel-based tungsten carbide coating, wherein a plurality of saw-toothed grooves are formed at an interval in the spherical outer surface of the metal body; the spherical outer surface of the metal body is uniformly coated with the nickel-based tungsten carbide coating; the thickness of the nickel-based tungsten carbide coating is 3mm to 6mm, wherein each groove is totally filled with the nickel-based tungsten carbide coating; the nickel-based tungsten carbide coating comprises 48.83wt% to 73.13wt% of tungsten carbide, 26.87wt% to 51.17wt% of nickel, 1.19wt% to 3.66wt% of chromium, 0.59wt% to 2.19wt% of boron, 0.91wt% to 2.56wt% of silicon and 0.59wt% to 2.19wt% of iron. According to the wear-resistant and washout-resistant ball valve core disclosed by the invention, tungsten carbide is flexibly arranged on the outer surface of a metal ball valve to form the nickel-based tungsten carbide coating by adopting a vacuum brazing process; subsequently a spherical ceramic mold is removed, and then a simple grinding process is performed to finally obtain the wear-resistant and washout-resistant ball valve core; the manufactured ball valve core is excellent in comprehensive performances such as wear resistance and washout resistance, thick in wear-resistant coating, convenient to machine and low in manufacturing cost.
Description
Technical field
A kind of the present invention relates to valve technology field, it is more particularly related to wear-resisting and erosion resistant ball valve
Core and its manufacture method.
Background technology
Metal hard-sealing ball valve material is generally carbon steel or stainless steel, due to the restriction of material itself, there is strong abrasion
Usually can cause to lose efficacy because of abrasion and erosion with ball valve core under strong erosion operating mode.Using surface strengthening technology, valve element is carried out
Surface modification, improves valve element erosive wear resistance, is the important method 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 scope is narrower,
Matrix material deformation is serious, and the composition of spray-welding coating and primitive component have different.The high temperature of bead-welding technology local can lead to be subject to
Heat is uneven, and thermograde is big, easily causes larger welding residual stress and deformation, and welding coating can Local Cracking even be formed
Through-wall crack, leads to coating shedding., in 0.2～0.6mm, coating is relatively low with basal body binding force, hole for the coating layer thickness of thermal spraying
Rate is higher, and the thermal efficiency is low, and operating environment is poor.It can be seen that, traditional wear-resistant coating technology is urgently improved to prepare high performance
The wear-resisting, ball valve core of erosion resistance coating.
Content of the invention
It is an object of the invention to solution at least the above, and provide the advantage that 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 manufacture method, 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
Tool is finally obtained wear-resisting and erosion resistance ball valve core through simple grinding, again to improve service life and the reliability of ball valve
Property.
In order to realize according to object of the present invention and further advantage, there is provided a kind of wear-resisting and erosion resistant ball valve
Core, including：
Metal body, on its spherical outer surface, interval offers some incised groove；
Tungsten carbide of nickel-base coating, its uniform fold in the spherical outer surface of described metal body, described tungsten carbide of nickel-base coating
Thickness is 3mm～6mm；
Wherein, described groove is filled up completely with by described tungsten carbide of nickel-base coating, includes in described tungsten carbide of nickel-base coating
The tungsten carbide of 48.83wt%～73.13wt%, the nickel of 26.87wt%～51.17wt%, the chromium of 1.19wt%～3.66wt%,
The iron of the boron of 0.59wt%～2.19wt%, the silicon of 0.91wt%～2.56wt% and 0.59wt%～2.19wt%.
Preferably, described 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, the boron powder of 1.21wt%, the silica flour of 1.6wt% and the iron powder of 1.21wt% make, the thickness of described tungsten carbide of nickel-base coating
Spend for 5mm.
Preferably, described groove is square sawtooth wave structure, and adjacent saw-tooth spacing is 2.5mm～3.0mm, adjacent two institutes
The spacing stating groove is 1.5mm～2.7mm, and the width of described groove is 0.2mm～0.8mm, and the depth of described groove is 0.2mm
～0.7mm.
Preferably, some described grooves equidistantly be arranged in parallel, and each described groove is the sawtooth waveforms of head and the tail closing
Structure, described groove is arranged concentrically with the through hole of described metal body.
Preferably, the width of described groove is 0.5mm, adjacent saw-tooth spacing 2.8mm of described groove, and adjacent two parallel
The spacing of groove is 2mm, and described depth of groove is 0.5mm.
Preferably, described groove inner wall is provided with some projections, described raised height is in 0.03mm～0.15mm.
Preferably, comprise the following steps：
Step one, 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%, silica flour 0.91wt%～2.56wt%, iron powder
0.59wt%～2.19wt%, each raw material is mixed；
Step 2, by raw material mixed powder end gross mass 1.39wt%～2.08wt% weigh polytetrafluorethylepowder powder add raw material mix
Close in powder and mix, mixed powder is pressed into tungsten carbide flexible cloth；
Step 3, the metal body surface of valve element is carried out sandblasting and goes oil processing, and process in metal body spaced surface
Some incised groove；
Step 4, metal body is placed concentrically in spherical die, described spherical die internal chamber wall and metal body outer surface
Gap be 6mm；
Step 5, the square that described tungsten carbide flexible cloth is cut into 2mm × 2mm are filled in described spherical die and metal body
Gap in and be compacted；
Step 6, will be filled with the described spherical die of tungsten carbide flexible cloth and metal body is placed in vacuum brazing furnace and burns
Knot, prepared surface is coated with the ball valve core of tungsten carbide of nickel-base coating；Wherein, the vacuum in soldering oven is at least 10-3Pa etc.
Grade, sintering curre is：Then it is 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 little
When, then with 10 DEG C/min～15 DEG C/min of speed be warming up to 1000 DEG C～1100 DEG C be incubated 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.
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%, silica flour 1.6wt% and iron powder 1.21wt%, the addition of described polytetrafluorethylepowder powder is raw material gross mass
1.73wt%, described tungsten-carbide powder can cross 240 mesh sieves.
Preferably, described groove is square sawtooth wave structure, and adjacent saw-tooth spacing is 2.5mm～3.0mm, adjacent two institutes
The spacing stating groove is 1.5mm～2.7mm, and the width of described groove is 0.2mm～0.8mm, and the depth of described groove is 0.2mm
～0.7mm.
Preferably, by the assembled ceramic die of the first half and lower half, lower half is bowl-shape to described spherical die, on
Half portion is bottomless bowl shape.The present invention at least includes following beneficial effect：
1st, the wear-resisting and erosion resistance ball valve core obtaining of present invention preparation, the thickness of tungsten carbide of nickel-base coating is 5mm, far super logical
Cross the thickness of the wear-resistant coating 0.2～0.3mm of supersonic spray coating, and in tungsten carbide of nickel-base coating, tungsten carbide particle be evenly distributed,
Coat inside zero defect, surface flawless, are combined into one structure with insert body well；
2nd, the erosion resistant excellent comprehensive mechanical property of resistance to break-in, wherein abrasion resistance properties are the 400 of 304 stainless steel ball valve cores
Times, it is 2 times of thermal spraying on surface Ni55 material, erosive wear resistance is 1.5 times that supersonic spray coating tungsten carbide coating is passed through on surface；
3rd, coating and insert body be combined into metallurgical binding, bond strength reaches 375MPa, and metal body and Ni-based carbonization
Square incised groove is machined with the interface of tungsten coating, to strengthen the adhesion of tungsten carbide of nickel-base coating and metal body, applies
Layer is difficult for drop-off with insert body；
4th, the wear-resisting and erosion resistance ball valve core processing technology obtaining of present invention preparation is simple, equipment investment is low, manufacturing cost
Low.
Part is embodied by the further advantage of the present invention, target and feature by description below, and part also will be by this
Invention research and practice and be understood by the person skilled in the art.
Brief description
Fig. 1 is metal body side view；
Fig. 2 is to be filled with the spherical die of tungsten carbide flexible cloth and the sectional view of metal body；
Fig. 3 is the electron microscope in tungsten carbide of nickel-base coating cross section；
Fig. 4 is wear-resisting and the manufacture method schematic flow sheet of erosion resistance ball valve core；
In the figures above： 1：The spherical die first half, 2：Spherical die lower half, 3, tungsten carbide flexible cloth：4th, metal body,
41st, groove.
Specific embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings, to make those skilled in the art with reference to specification literary composition
Word can be implemented according to this.
It should be appreciated that used herein such as " have ", "comprising" and " inclusion " term do not allot one or many
The presence of individual other element or a combination thereof or interpolation.
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, wherein：
Metal body 4, on its spherical outer surface, interval offers some incised groove 41, and the axial direction of described metal body is opened
It is provided with the through hole for water conservancy diversion, groove 41 described in the present embodiment is square sawtooth wave structure it is to be appreciated that groove is permissible
It is the 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, spacing L3 of adjacent two described grooves be 1.5mm～
2.7mm, preferably 2mm, the width L1 of described groove is 0.2mm～0.8mm, preferably 0.5mm, the depth of described groove
For 0.2mm～0.7mm, preferably 0.5mm；
Tungsten carbide of nickel-base coating, its uniform fold is in the spherical outer surface of described metal body 4, and described groove is filled out completely
Fill, the erosion resistant excellent comprehensive mechanical property of resistance to break-in of tungsten carbide of nickel-base coating, wherein abrasion resistance properties are 304 stainless steel balls
400 times of valve core, are 2 times of thermal spraying on surface Ni55 material, and erosive wear resistance is that supersonic spray coating tungsten carbide is passed through on surface
1.5 times of coating；The thickness of described tungsten carbide of nickel-base coating is 3mm～6mm, and preferably the thickness of tungsten carbide of nickel-base coating is 5mm,
The thickness of far super wear-resistant coating 0.2～0.3mm by supersonic spray coating, and tungsten carbide particle distribution in tungsten carbide of nickel-base coating
Uniformly, as shown in figure 3, particle diameter is in um grade, coating consistency is high, coat inside zero defect, surface flawless, and the porosity is very
Little, thus being combined into one structure with insert body well, difficult for drop-off, embody excellent wear-resisting and erosion resistance comprehensive
Can, and wear-resistant coating is thick, easy to process, low cost of manufacture, effectively increases service life and the reliability of ball valve.
The interface of metal body and tungsten carbide of nickel-base coating forms square incised groove using spark machined, increases
Add the contact area of tungsten carbide coating and metal body, applied to strengthen the adhesion of tungsten carbide coating and metal body, meanwhile
Layer and the metallurgical binding that is combined into of 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 adhesion of tungsten carbide of nickel-base coating and metal body, coating and valve element
Body is difficult for drop-off.
In another kind of embodiment, described 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 iron of the silicon of 2.56wt% and 0.59wt%～2.19wt% is made, in the present embodiment, specifically, described 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% silica flour
And the iron powder of 1.21wt% makes, after shaping, the thickness of described tungsten carbide of nickel-base coating is 5mm, the Ni-based carbon of this raw material proportioning
Change tungsten coating there is the wear-resisting of superhigh intensity and erosive wear resistance, thus spool face is modified so that valve element have super
High wear-resisting and erosive wear resistance, to strengthen service life and reliability.
In another kind of embodiment, some described grooves equidistantly be arranged in parallel, as shown in figure 1, each described groove
For the sawtooth wave structure of head and the tail closing, and described groove is arranged concentrically with the through hole of described metal body, such as terrestrial latitude line one
Sample is uniformly opened in that metal body is spherical in appearance, increases the area coverage of groove, simultaneously when described tungsten carbide of nickel-base coating with
When metal body combines, described tungsten carbide of nickel-base coating has more contact surfaces by groove and metal body, to improve combination
Intensity, meanwhile, each bar groove is evenly arranged in spherome surface, and the adhesion of described tungsten carbide of nickel-base coating and metal body is more
It is arranged on metal body in a balanced way, thus described tungsten carbide of nickel-base coating is combined in a balanced way with metal body, it is to avoid go out current situation
Portion comes off.
In another kind of embodiment, described groove inner wall is provided with some projections, that is, in fluting, as far as possible by cell wall
It is split into crude face, thus be covered with groove face thering is projection, described raised height is distributed in 0.03mm～0.15mm, described Ni-based
Tungsten carbide coating is completely filled in groove, to increase the adhesion of described tungsten carbide of nickel-base coating and groove further, because
Cell wall is more smooth, and described tungsten carbide of nickel-base coating is less with the adhesion of groove, or easily entirety comes off, and cell wall remains with
Projection, then solve this problem well, improve bond strength.
The manufacture method of a kind of wear-resisting and erosion resistance ball valve core, as shown in figure 4, comprise the following steps：
Step one, 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%, silica flour 0.91wt%～2.56wt%, iron powder
0.59wt%～2.19wt%, described tungsten-carbide powder can cross 240 mesh sieves, 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%, silica flour 1.6wt% and iron powder 1.21wt%, will
Each raw material mixes stand-by；
Step 2, to raw material mixed powder end in be added into account for raw material mixed powder end gross mass 1.73% polytetrafluorethylepowder powder, will
Powder roll squeezer roll-forming after mixing obtains tungsten carbide flexible cloth 3；
Step 3, the metal body surface of valve element is carried out sandblasting and goes oil processing, then existed by the method for spark machined
Metal body outer surface processes some described grooves, and the width of groove is 0.5mm, and adjacent saw-tooth spacing is 2.8mm, adjacent
Article two, the spacing of parallel groove is 2mm, and depth of groove is 0.5mm；
Step 4, by after metal body surface cleaning, be placed concentrically in spherical die center, the through hole of metal body longitudinally sets
Put, described spherical die is by the assembled ceramic die of the first half 1 and lower half 2, as shown in Fig. 2 lower half is bowl-shape, on
Half portion is bottomless bowl shape, and both carry out assembly by the locating slot on contact surface, metal body are equidistantly coated on mould
Inside, the gap of described spherical die internal chamber wall and metal body outer surface is 6mm everywhere, the in other words inside radius ratio of mould
The big 1mm of the radius of a ball of metal body；
Step 5, the square that described tungsten carbide flexible cloth 3 is cut into 2mm × 2mm are filled in described spherical die and metal basis
In the gap of body and be compacted, specifically, will the first half 1 and lower half 2 separately, be placed with a circle 6mm in lower half bottom periphery
Wide tungsten carbide flexible cloth is used for the positioning of metal body, and metal body 4 through hole direction is vertically disposed in the bottom of lower half
Centre, bottom outer surface is fitted with the tungsten carbide flexible cloth being placed on lower half bottom in advance, so that metal body and mould
The distance between internal chamber wall remains 6mm, subsequently inserts tungsten carbide flexible cloth toward in gap, is compacted when filling out, until lower half
It is filled up completely with and finishes, subsequently the first half is carried out assembly along the locating slot on contact surface, continue to fill tungsten carbide toward in gap
Flexible cloth, until tungsten carbide flexible cloth is filled up completely with gap, finally with instrument, tungsten carbide flexible cloth is compacted in gap, reduces
Space in gap is so that tungsten carbide flexible cloth is evenly arranged in metal body periphery；
Step 6, will be filled with the described spherical die of tungsten carbide flexible cloth and metal body is put in vacuum brazing furnace and burnt
Knot, is first evacuated to 10 by stove-3Pa, sintering is obtained surface and is coated with tungsten carbide of nickel-base coating ball valve core；Wherein, in sintering
During, the vacuum in soldering oven is at least 10-3Pa grade, concrete sintering curre is：It is warming up to 300 with 5 DEG C/min of speed
DEG C and keep 1 hour, then with 10 DEG C/min be warming up to 1050 DEG C be incubated 1 hour, be then cooled to 15 DEG C/min of speed again
Room temperature；
Step 7, tungsten carbide of nickel-base coating is carried out grinding, wear-resisting and erosion resistance ball valve core is obtained.
In sintering process, polytetrafluoroethylene powder volatilizees, and 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 that 5mm is thick, uniform fold is in the outer surface of metal body and difficult for drop-off, can from Fig. 3
Go out, tungsten carbide of nickel-base coating consistency is high, and in tungsten carbide of nickel-base coating, tungsten carbide particle is evenly distributed, particle diameter 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 with insert body well structure with metal body, not easy to crack with come off, embody excellent resistance to
Mill and erosion resistance combination property, and wear-resistant coating is thick, easy to process, low cost of manufacture, 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, thickness is 5mm.Coating cross section
As shown in figure 3, tungsten carbide particle is evenly distributed in nickel-base material, no particle agglomeration and pore electromicroscopic photograph occur.Preparation
Wear-resisting and erosion resistance ball valve core shows the excellent erosion resistant comprehensive mechanical performance of resistance to break-in, 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 supersonic speed is passed through on surface
1.5 times of sprayed wc coating.It can be seen that, the wear-resisting and erosion resistance ball valve core of the present invention be greatly improved ball valve in abrasion and
The life and reliability being on active service under erosion operating mode.
From the above mentioned, the wear-resisting and erosion resistance ball valve core body of the present invention is metal, and outer metallic surface is Ni-based carbonization
Tungsten coating, the interface of metal body and tungsten carbide of nickel-base coating is machined with square incised groove, to strengthen tungsten carbide of nickel-base
Coating and the adhesion of metal body.This is wear-resisting and erosion resistance ball valve core is by a dismountable spherical ceramic mould cladding
Outside metal ball-valve valve element, tungsten carbide flexible cloth is filled in the gap that ceramic die is with metal ball-valve valve element, 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 mould
Wear-resisting and erosion resistance ball valve core is finally obtained through simple grinding again.The wear-resisting and erosion resistance ball valve that the present invention provides
Valve element has that excellent wear-resisting and erosion resistance combination property, wear-resistant coating be thick, easy to process, low cost of manufacture.
The wear-resisting and erosion resistance ball valve core obtaining of present invention preparation, tungsten carbide particle distribution in tungsten carbide of nickel-base coating
Uniformly, coat inside zero defect, surface flawless, are combined into one structure with insert body well, and bond strength reaches
Square incised groove is machined with 375MPa, and the interface of metal body and tungsten carbide of nickel-base coating, to strengthen Ni-based carbonization
Tungsten coating and the adhesion of metal body, coating is difficult for drop-off with insert body；Further, the present invention preparation obtain resistance to
Mill and erosion resistance ball valve core processing technology are simple, equipment investment is low, low cost of manufacture is it is easy to promote.
Although embodiment of the present invention is disclosed as above, it is not restricted to listed in specification and embodiment
With, it can be applied to various suitable the field of the invention completely, for those skilled in the art, can be easily
Realize other modification, therefore under the universal being limited without departing substantially from claim and equivalency range, the present invention does not limit
In specific details with shown here as the legend with description.
Claims (10)
1. a kind of wear-resisting and erosion resistant ball valve core is it is characterised in that include：
Metal body, on its spherical outer surface, interval offers some incised groove；
Tungsten carbide of nickel-base coating, its uniform fold in the spherical outer surface of described metal body, described tungsten carbide of nickel-base coating
Thickness is 3mm～6mm；
Wherein, described groove is filled up completely with by described tungsten carbide of nickel-base coating, includes in described tungsten carbide of nickel-base coating
The tungsten carbide of 48.83wt%～73.13wt%, the nickel of 26.87wt%～51.17wt%, the chromium of 1.19wt%～3.66wt%,
The iron of the boron of 0.59wt%～2.19wt%, the silicon of 0.91wt%～2.56wt% and 0.59wt%～2.19wt%.
2. as claimed in claim 1 wear-resisting and erosion resistant ball valve core it is characterised in that described 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% silica flour with
And the iron powder of 1.21wt% makes, the thickness of described tungsten carbide of nickel-base coating is 5mm.
3. as claimed in claim 1 wear-resisting and erosion resistant ball valve core it is characterised in that described groove is square sawtooth waveforms
Structure, adjacent saw-tooth spacing is 2.5mm～3.0mm, and the spacing of adjacent two described grooves is 1.5mm～2.7mm, described groove
Width be 0.2mm～0.8mm, the depth of described groove is 0.2mm～0.7mm.
4. as claimed in claim 3 wear-resisting and erosion resistant ball valve core it is characterised in that some described grooves are equidistant
It is arranged in parallel, each described groove is the sawtooth wave structure of head and the tail closing, described groove is same with the through hole of described metal body
The heart is arranged.
5. as claimed in claim 4 wear-resisting and erosion resistant ball valve core it is characterised in that the width of described groove is
0.5mm, adjacent saw-tooth spacing 2.8mm of described groove, the spacing of adjacent two parallel grooves is 2mm, and described depth of groove is
0.5mm.
6. as claimed in claim 5 wear-resisting and erosion resistant ball valve core it is characterised in that being provided with described groove inner wall
Some projections, described raised height is in 0.03mm～0.15mm.
7. the manufacture method of a kind of wear-resisting and erosion resistance ball valve core is it is characterised in that comprise the following steps：
Step one, 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%, silica flour 0.91wt%～2.56wt%, iron powder
0.59wt%～2.19wt%, each raw material is mixed；
Step 2, by raw material mixed powder end gross mass 1.39wt%～2.08wt% weigh polytetrafluorethylepowder powder add raw material mix
Close in powder and mix, mixed powder is pressed into tungsten carbide flexible cloth；
Step 3, the metal body surface of valve element is carried out sandblasting and goes oil processing, and process in metal body spaced surface
Some incised groove；
Step 4, metal body is placed concentrically in spherical die, described spherical die internal chamber wall and metal body outer surface
Gap be 6mm；
Step 5, the square that described tungsten carbide flexible cloth is cut into 2mm × 2mm are filled in described spherical die and metal body
Gap in and be compacted；
Step 6, will be filled with the described spherical die of tungsten carbide flexible cloth and metal body is placed in vacuum brazing furnace and burns
Knot, prepared surface is coated with the ball valve core of tungsten carbide of nickel-base coating；Wherein, the vacuum in soldering oven is at least 10-3Pa etc.
Grade, sintering curre is：Then it is 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 little
When, then with 10 DEG C/min～15 DEG C/min of speed be warming up to 1000 DEG C～1100 DEG C be incubated 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.
8. the manufacture method of wear-resisting as claimed in claim 7 and erosion resistance ball valve core is it is characterised in that raw material mixed powder is last
In 59.8wt% containing tungsten-carbide powder, nickel powder 33.77wt%, chromium powder 2.41wt%, boron powder 1.21wt%, silica flour 1.6wt% and iron powder
1.21wt%, the addition of described polytetrafluorethylepowder powder is the 1.73wt% of raw material gross mass, and described tungsten-carbide powder can cross 240
Mesh sieve.
9. the manufacture method of wear-resisting as claimed in claim 7 and erosion resistance ball valve core is it is characterised in that described groove is just
Square sawtooth wave structure, adjacent saw-tooth spacing is 2.5mm～3.0mm, and the spacing of adjacent two described grooves is 1.5mm～2.7mm,
The width of described groove is 0.2mm～0.8mm, and the depth of described groove is 0.2mm～0.7mm.
10. as claimed in claim 7 the manufacture method of wear-resisting and erosion resistant ball valve core it is characterised in that described spherical
By the assembled ceramic die of the first half and lower half, lower half is bowl-shape to mould, and the first half is bottomless bowl shape.
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| CN201610883015.6A CN106402420B (en) | 2016-10-10 | 2016-10-10 | Wear-resisting and erosion resistant ball valve core and its manufacturing method |
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| CN201610883015.6A CN106402420B (en) | 2016-10-10 | 2016-10-10 | Wear-resisting and erosion resistant ball valve core and its manufacturing method |
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| CN106402420B CN106402420B (en) | 2019-03-22 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN114349525A (en) * | 2021-12-23 | 2022-04-15 | 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 |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5593726A (en) * | 1990-05-10 | 1997-01-14 | Apv Corporation Limited | Hot isostatic pressing process for applying wear and corrosion resistant coatings |
| CN102453897A (en) * | 2010-10-26 | 2012-05-16 | 沈阳大陆激光成套设备有限公司 | Method for manufacturing tungsten carbide hard alloy wear-resistant coating of rod and wire hot press roll |
| CN103230216A (en) * | 2013-05-03 | 2013-08-07 | 武汉苏泊尔炊具有限公司 | Non-stick pan |
| CN203214934U (en) * | 2013-05-11 | 2013-09-25 | 东裕(桐柏)精密金属有限公司 | High-pressure valve ball |
| CN104315185A (en) * | 2014-09-01 | 2015-01-28 | 浙江永盛仪表有限公司 | Double-scraper ultra-hard sealing ball valve |
| CN104911586A (en) * | 2015-07-03 | 2015-09-16 | 上海材料研究所 | Method for cladding tungsten carbide coating on surface of metal substrate |
-
2016
- 2016-10-10 CN CN201610883015.6A patent/CN106402420B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5593726A (en) * | 1990-05-10 | 1997-01-14 | Apv Corporation Limited | Hot isostatic pressing process for applying wear and corrosion resistant coatings |
| CN102453897A (en) * | 2010-10-26 | 2012-05-16 | 沈阳大陆激光成套设备有限公司 | Method for manufacturing tungsten carbide hard alloy wear-resistant coating of rod and wire hot press roll |
| CN103230216A (en) * | 2013-05-03 | 2013-08-07 | 武汉苏泊尔炊具有限公司 | Non-stick pan |
| CN203214934U (en) * | 2013-05-11 | 2013-09-25 | 东裕(桐柏)精密金属有限公司 | High-pressure valve ball |
| CN104315185A (en) * | 2014-09-01 | 2015-01-28 | 浙江永盛仪表有限公司 | Double-scraper ultra-hard sealing ball valve |
| CN104911586A (en) * | 2015-07-03 | 2015-09-16 | 上海材料研究所 | Method for cladding tungsten carbide coating on surface of metal substrate |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN114349525A (en) * | 2021-12-23 | 2022-04-15 | 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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|---|---|
| CN106402420B (en) | 2019-03-22 |
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