CN201170342Y - Tungsten carbide ceramic-metal composite wear-resistant ball valve - Google Patents
Tungsten carbide ceramic-metal composite wear-resistant ball valve Download PDFInfo
- Publication number
- CN201170342Y CN201170342Y CNU2008200117829U CN200820011782U CN201170342Y CN 201170342 Y CN201170342 Y CN 201170342Y CN U2008200117829 U CNU2008200117829 U CN U2008200117829U CN 200820011782 U CN200820011782 U CN 200820011782U CN 201170342 Y CN201170342 Y CN 201170342Y
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- valve
- tungsten carbide
- tungsten
- ball
- cermet composite
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- Coating By Spraying Or Casting (AREA)
Abstract
The utility model relates to a wearable ball valve made from tungsten carbide cermet composite materials. The wearable ball valve comprises a valve ball, a valve seat and a valve body, and is characterized in that a flow passage inner wall through which fluid passes is evenly coated with a tungsten carbide cermet composite material abrasion resistant coating through spray coating; meanwhile, a sealing secondary surface of the valve ball and the valve seat is also evenly coated with a tungsten carbide cermet composite material abrasion resistant coating through spray coating. The wearable ball valve has the advantages that the ball valve has low cost, long service life, reliable use and higher abrasion resistance; a carbon-steel sphere has the advantages of low cost, excellent processability, and the like; meanwhile, a tungsten carbide wearable outer layer has excellent abrasion resistance, and carbon steel and a tungsten carbide wearable layer has better bonding stability and firmness; moreover, in order to ensure higher bonding strength between a tungsten carbide coating and a carbon-steel matrix, tungsten carbide ion implanting of a to-be-coated piece is carried out before spray coating, thereby forming a transition layer; in addition, a transition circular arc surface is arranged so as to further ensure the bonding force between the tungsten carbide coating and the carbon-steel body.
Description
Technical field
The utility model relates to a kind of industrial tungsten-carbide cermet composite-material ball valve with antiwear characteristic.
Background technique
The existing industrial ball valve that wear-resisting requirement arranged generally is to adopt following several method to reach wear-resisting purpose:
1. plating hard chromium on surface
2. integral material adopts high-abrasive material
3. carry out surface modification treatment to improve surface abrasion resistance
About first method: so whole chromium plating is limited because of the raising of the thin wear resistance of coating, chromium plating has simultaneously caused pollution to environment again.And the whole high-abrasive material that adopts will inevitably cause cost too high in the second method, and technology capability is bad.The third method is the new technology that present stage improves the ball valve wear-resisting property.Its method has a lot: handles such as surface heat, and surface carburization, carbonitriding, the surface spraying, surface ion is annotated and oozed, and is laser surface intensified etc.And the simple application of these technology all has certain narrow limitation.Thereby limited the further raising of ball valve wear resistance.
Tungsten carbite has very outstanding wear-resisting property, and it is sprayed on the water passage surface and valve ball valve seat fitting surface of ball valve, will increase the wear resistance of ball valve greatly.But on the physical property of material, differ greatly between the matrix of Tungsten carbite and carbon steel, sprayfused coating is relative with the combination force of matrix less, so the effect that the part (as valve ball and valve seat) under relative working environment comparison rugged environment directly sprays is very desirable.It is a kind of capable of to be able to the technology of extensive use at semiconductor that the surface ion notes ooze.And the metallic surface ion implanting also has research after a while at home and abroad.Be characterized in that matrix is an one with annotating infiltration layer, in conjunction with very firm, but shortcoming is that the notes infiltration layer is too thin, anti-sharp wear ability.
Summary of the invention
The purpose of this utility model provides that a kind of cost is low, the life-span is long, it is reliable to use and have tungsten-carbide cermet composite-material wear-resistant ball valve than high-wear resistance.The mode that this wear resistance ball valve adopts ion implanting and spraying to combine after making the spray piece plain steel and annotating infiltration layer formation transitional surface, sprays again, has greatly improved Tungsten carbite sprayfused coating and high base strength, has improved the wear resistance of ball valve.
For achieving the above object, the utility model adopts following technological scheme to realize:
Tungsten-carbide cermet composite-material wear-resistant ball valve, comprise valve ball, valve seat, valve body, the runner inner wall of passing through at fluid all is coated with the tungsten-carbide cermet composite-material wear-resistant coating, and the while all is coated with the tungsten-carbide cermet composite-material wear-resistant coating on the sealing surfaces of the sealing pair of valve ball and valve seat formation.
So because of the state working state that is in slide relative between valve ball and the valve seat more abominable, for further improving its wear resistance before the sprayed wc coating, adopt the method for ion implanting to inject Tungsten carbite on to be sprayed surface earlier, make valve ball and valve base surface form the Tungsten carbite enriched layer, when spraying the high temperature and high speed Tungsten carbite and metal binding agent just to mutually combine with the Tungsten carbite enriched layer of original injection be an integral body, so just greatly improved the adhesive strength of Tungsten carbite sprayfused coating and plain steel.
Between spraying face and adjacent non-spraying surface, be provided with the transition circle cambered surface in addition, be coated with the tungsten-carbide cermet composite-material wear-resistant coating again after also injecting Tungsten carbite earlier on the transition circle cambered surface.Further guaranteed the adhesive strength of wear resistant coating and plain steel.
The utility model has the advantages that: cost is low, the life-span is long, use is reliable and have than high-wear resistance.The carbon steel material spheroid has advantages such as cost is low, good processability, and the outer field wear-resisting property of carbine abrasion-proof is good, infilter Tungsten carbite formation transition layer because of annotating at steel surface in advance, so the stable soundness that carbon steel combines with the carbine abrasion-proof layer is also better, and, further guaranteed the combination force between tungsten carbide coating and the carbon steel body owing to be provided with the transition circle cambered surface.
Description of drawings
Fig. 1 is the structural representation one of tungsten-carbide cermet composite-material wear-resistant ball valve;
Fig. 2 is the structural representation two of tungsten-carbide cermet composite-material wear-resistant ball valve;
Fig. 3 is the structural representation three of tungsten-carbide cermet composite-material wear-resistant ball valve.
Among the figure: 1-valve ball 2-wear resistant coating 3-valve seat 4-valve body
Embodiment
Below in conjunction with accompanying drawing technology contents of the present utility model is described further (surface of deposition that the line segment of overstriking is the tungsten-carbide cermet composite-material wear-resistant coating among the figure):
Fig. 1, Fig. 2, Fig. 3 are the structural drawing of three types wear resistance ball valve, on this ball valve of three types, all have following feature: comprise valve ball 1, wear resistant coating 2, valve seat 3, valve body 4, it is in runner inner wall that fluid passes through, all be coated with tungsten-carbide cermet composite-material wear-resistant coating 2 on the internal conical surface of the outer surface of valve ball and valve seat.
As shown in Figure 1-Figure 3, the material of valve ball is a carbon steel material, the outer spherical surface of carbon steel valve ball spheroid and through hole inner cylindrical surface thereof, and the runner internal surface of valve body all be coated with tungsten-carbide cermet composite-material wear-resistant coating 2, simultaneously also want sprayed wc cermet composite-material wear-resistant coating 2 on the sealing pair surface that valve seat 3 contacts with valve ball 1 outer surface, between spraying face and adjacent surface, transitional surface is arranged, transitional surface is generally intersection rounding gained between spraying face and the spraying face, and transitional surface is wanted sprayed wc cermet composite-material wear-resistant coating 2 equally.
Before to valve ball 1, valve seat 3 sprayings, to carry out the Tungsten carbite ion implanting to it earlier.Its technological method is as follows: will wait to annotate the valve ball 1, valve seat 3 parts that ooze and put into the special-purpose airtight pot container that can vacuumize and can charge into the inert gas medium, and the degree of vacuum maximum of this container should be able to reach 0.01Pa, and the difference that the object technology that oozes according to required notes requires is evacuated to 0.1～1000Pa to it.Feed inert gas (mainly being helium) simultaneously, be fixed with tungsten rod on the inner tank wall insulation layer liner and produce glow discharge as feeding high-tension current between anode and the negative electrode (valve ball 1 and valve seat 3), discharge voltage is 50～1500V.Continuous increase along with discharge current, continuous the increasing of temperature reaches 900～1100 ℃ in the container, the tungsten metal of anode is ionized, under effect of electric field, at a high speed inject workpiece (valve ball 1 and valve seat 3), and further generate tungsten carbide tool to the workpiece diffusion inside and with carbon chemical combination in workpiece (valve ball 1 and the valve seat 3) material.
Valve ball 1 and valve seat 3 annotated ooze tungsten carbide tool after to its sprayed wc, spraying method is the HVAF method.The raw material of spraying is the mixture of tungsten-carbide powder and cobalt powder powder.Coating thickness is 0.8～1.2mm, and the sealing pair fitting surface to valve ball and valve seat will carry out precise finish processing after spraying then, and the thickness after the grinding is 0.5～0.7mm.Surface requirements reaches mirror finish, reveals so that valve reaches zero.Other spraying faces do not need processing.
Claims (3)
1, tungsten-carbide cermet composite-material wear-resistant ball valve, comprise valve ball, valve seat, valve body, it is characterized in that, the runner inner wall of passing through at fluid all is coated with the tungsten-carbide cermet composite-material wear-resistant coating, also is coated with the tungsten-carbide cermet composite-material wear-resistant coating simultaneously on the sealing pair surface of valve ball and valve seat.
2, tungsten-carbide cermet composite-material wear-resistant ball valve according to claim 1, it is characterized in that, between spraying face and adjacent non-spraying surface, be provided with the transition circle cambered surface, also be coated with the tungsten-carbide cermet composite-material wear-resistant coating on the transition circle cambered surface.
3. according to the technological method of claim 1 or the described tungsten-carbide cermet composite-material wear-resistant ball valve of claim 2, it is characterized in that, before sprayed wc cermet composite-material wear-resistant coating, adopt the method for ion implanting to inject Tungsten carbite on to be sprayed surface earlier, make to be sprayed surface form the transition layer of Tungsten carbite and steel, and then sprayed wc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200117829U CN201170342Y (en) | 2008-03-28 | 2008-03-28 | Tungsten carbide ceramic-metal composite wear-resistant ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200117829U CN201170342Y (en) | 2008-03-28 | 2008-03-28 | Tungsten carbide ceramic-metal composite wear-resistant ball valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201170342Y true CN201170342Y (en) | 2008-12-24 |
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ID=40209395
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200117829U Expired - Lifetime CN201170342Y (en) | 2008-03-28 | 2008-03-28 | Tungsten carbide ceramic-metal composite wear-resistant ball valve |
Country Status (1)
| Country | Link |
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| CN (1) | CN201170342Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110238007A (en) * | 2019-07-19 | 2019-09-17 | 吴忠仪表有限责任公司 | The preparation method and preparation cooling device of high-end ball valve ball core surface cladding coating |
-
2008
- 2008-03-28 CN CNU2008200117829U patent/CN201170342Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110238007A (en) * | 2019-07-19 | 2019-09-17 | 吴忠仪表有限责任公司 | The preparation method and preparation cooling device of high-end ball valve ball core surface cladding coating |
| CN110238007B (en) * | 2019-07-19 | 2023-10-10 | 吴忠仪表有限责任公司 | Preparation method of cladding coating on surface of ball core of high-end ball valve and cooling device for preparation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20081224 Effective date of abandoning: 20080328 |