CN203906936U - Super-hard wear-resistant valve with WC (Wolfram Carbide) and CrN (Chromium Nitride) composite coating - Google Patents
Super-hard wear-resistant valve with WC (Wolfram Carbide) and CrN (Chromium Nitride) composite coating Download PDFInfo
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- CN203906936U CN203906936U CN201420195917.7U CN201420195917U CN203906936U CN 203906936 U CN203906936 U CN 203906936U CN 201420195917 U CN201420195917 U CN 201420195917U CN 203906936 U CN203906936 U CN 203906936U
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Abstract
The utility model discloses a super-hard wear-resistant valve with a WC (Wolfram Carbide) and CrN (Chromium Nitride) composite coating. The super-hard wear-resistant valve with the WC and CrN composite coating comprises a valve base body; a WC bottom coating sprayed by adopting a supersonic flame spraying method and a CrN top coating deposited by adopting a magnetic control spluttering method are sequentially arranged on the surface of the valve base body from inside to outside. The super-hard wear resistant valve with the WC and CrN composite coating has the advantage that the valve can be better applied to a severe working condition.
Description
Technical field
The present invention relates to valve technology field, especially relate to a kind of superhard wear valve.The invention still further relates to the preparation method of this superhard wear valve.
Background technique
Valve is the crucial controlling component in industry equipment, is widely used in the industry-by-industries such as oil, chemical industry, metallurgy, electric power, food, medicine, plumbing, gas conveying.Under some severe working environments, in the industries such as petrochemical industry, have the bad working environments such as the high impurity wearing and tearing of high erosion, severe corrosive and High Temperature High Pressure gas, solid, liquid three-phase flow, this Environmental Conditions is very high to the requirement of valve, need to use high performance superhard wear valve.
Surface engineering technology refers to that material is after surface preparation, apply or kinds of surface technology compounding by surface modification, surface, change configuration of surface, chemical composition, Organizational Structure and the stress phase etc. of matrix surface, to obtain the systems engineering of required surface property.Wherein, surface coating is the important component part of surface engineering technology.In order to extend the working life of valve under bad working environments, people's general choice surface coating technique carries out modification to valve matrix, improves its hardness, wear resistance and corrosion resistance.
At present, which kind of cladding technique no matter valve products adopt, and mostly uses single cladding material.For single cladding material, be limited to the characteristic of material itself, although in some aspects functional of coating valve, the performance of other aspects may be restricted, and causes the combination property of product not high.Such as, the valve hardness that is coated with WC coating is high, and wear-resisting property is good, but the oxidation resistance of valve and corrosion resisting property are not high; The valve corrosion resistance that is coated with CrN coating is good, also has higher hardness, but not high with substrate combinating strength, easily produces the problem of coating shedding in using process.The deficiency of these aspects, all can shorten working life of superhard wear coating, can not meet the use of valve under bad working environments.
Summary of the invention
The object of this invention is to provide a kind of superhard wear valve of Tungsten carbite chromium nitride composite coating, it has can be applicable to the feature in bad working environments preferably.The invention also discloses the preparation method of the superhard wear valve of this Tungsten carbite chromium nitride composite coating.
First technological scheme of the present invention is: the superhard wear valve of Tungsten carbite chromium nitride composite coating, comprise valve matrix, described valve matrix surface is provided with the WC undercoat that adopts supersonic flame spraying method spraying and the CrN top coat that adopts magnetically controlled sputter method deposition from the inside to surface successively.
The thickness of described WC undercoat is 50～500 μ m, and the thickness of CrN top coat is 1～5 μ m.
The advantage that the superhard wear valve of Tungsten carbite chromium nitride composite coating of the present invention has is: can be applicable to preferably in bad working environments.The superhard wear valve of Tungsten carbite chromium nitride composite coating of the present invention has fully absorbed the advantage of WC coating and CrN coating, make this valve there is higher hardness and wear-resisting property, and there is good oxidation resistance and corrosion resistance, can be applicable in comparatively severe operating mode.In particular, WC directly contacts with matrix as valve undercoat, and adhesive quality is good, is conducive to improve the adhesive strength of coating and matrix; CrN is as valve top coat, and oxidation resistance is good, is conducive to improve the anti-corrosion characteristic of product., because WC coating exists porosity ratio in various degree, in some strong corrosive environments, be on active service meanwhile, need to carry out necessary sealing of hole processing, and the CrN top coat depositing on WC undercoat play the effect to WC undercoat sealing of hole.And CrN top coat has fine structure, in the inner pressure stress that produces of coating, resistance to crack extension ability is strong, and CrN top coat smooth surface can effectively stop the expansion of transverse crack, reduces friction factor simultaneously.In other words, two kinds of coatings are used in conjunction with, and are conducive to bring into play the advantage separately of different coating, make the superhard wear valve of Tungsten carbite chromium nitride composite coating reach high-performance, are applied to the special dimensions such as bad working environments, improve working life.
Second technological scheme of the present invention is: the preparation method of the superhard wear valve of Tungsten carbite chromium nitride composite coating, comprises the following steps:
1) pretreatment: valve matrix surface is carried out successively to the pretreatment of preprocessing, surface cleaning and surface active;
2) spraying bottom coating: taking WC powder as sprayed on material, to after aviation kerosine and oxygen atomization mixing, spray into continuous burning in firing chamber, produce high pressure flame stream, and by expanding nozzle, high pressure flame stream is accelerated to supersonic speed, taking nitrogen as powder feeding gas, carry WC powder and enter in high speed flame stream, through heating, acceleration, be ejected into workpiece surface and form coating, main spray parameters is: kerosene oil flow 20～30L/h, oxygen flow 50～60m
3/ h, powder feeding rate 70～80g/min, spray distance 310～350mm, spray angle: sphere normal direction, single pass coating thickness is 10～15 μ m;
3) deposition top coat: taking pure metal Cr as target, taking Ar-N2 mixed gas as working gas, Metal Cr target produces Cr atom or ion through sputter, reacts generate CrN with the N2 in working gas, be deposited on matrix surface, form CrN coating, major sedimentary parameter is: working gas pressure 0.5～3Pa, and Ar and N2 flow are by mass flowmenter control, intrinsic standoff ratio 1:1～1:3, sputtering current 0.5～2A, sputtering voltage 100～300V, 200～700 DEG C of depositing temperatures.
The advantage that the preparation method of the superhard wear valve of Tungsten carbite chromium nitride composite coating of the present invention has is: be easy to realize.All extensive uses in industry of the equipment using in the method, manufacturing process is simple, is easy to control, and is applicable to mass production and commercial application, has good prospects for commercial application.
Brief description of the drawings
Below in conjunction with drawings and Examples, the present invention is further described:
Fig. 1 is that the master of the superhard wear valve surface structure of the Tungsten carbite chromium nitride composite coating of embodiments of the invention looks sectional view.
In figure: 10, valve matrix; 20, WC undercoat; 30, CrN top coat.
Embodiment
Embodiment 1
As shown in Figure 1: the superhard wear valve of Tungsten carbite chromium nitride composite coating, comprises valve matrix 10.These valve matrix 10 surfaces are provided with the WC undercoat 20 that adopts supersonic flame spraying method spraying and the CrN top coat 30 that adopts magnetically controlled sputter method deposition from the inside to surface successively.Wherein, the thickness of this WC undercoat 20 is 50 μ m, and the thickness of CrN top coat 30 is 5 μ m.
Its preparation method comprises the following steps:
1) pretreatment: these valve matrix 10 surfaces are carried out to the pretreatment of preprocessing, surface cleaning and surface active successively.Wherein, surface preparation refers to: spherical grinding processing and deburring processing; The method that surface cleaning adopts is: cleaning, rust cleaning, oil removing ungrease treatment; The method that surface active adopts is: sandblast alligatoring or polishing.
2) spraying bottom coating: this WC undercoat 20 adopts supersonic flame spraying method spraying.Concrete, by spraying into continuous burning in firing chamber after aviation kerosine and oxygen atomization mixing, produce high pressure flame stream, and by expanding nozzle, high pressure flame stream is accelerated to supersonic speed.Taking nitrogen as powder feeding gas, carry WC powder and enter in high speed flame stream, through heating, acceleration, be ejected into workpiece surface and form this WC undercoat 20.Main spray parameters is: kerosene oil flow 20L/h, oxygen flow 50m
3/ h, powder feeding rate 70g/min, spray distance 310mm, spray angle: sphere normal direction, single pass coating thickness is 10 μ m.The paint finishing equipment that this process adopts can be divided into four parts: the spray gun of manipulator control, control system, powder feed system, cooling system.
3) deposition top coat: this CrN top coat 30 adopts magnetically controlled sputter method to be deposited on this WC undercoat 20.Concrete, taking pure metal Cr as target, taking Ar-N2 mixed gas as working gas, Metal Cr target produces Cr atom or ion through sputter, reacts generate CrN with the N2 in working gas, is deposited on this WC undercoat 20 surfaces, forms this CrN top coat 30.Major sedimentary parameter is: working gas pressure 0.5Pa, Ar and N2 flow be by mass flowmenter control, intrinsic standoff ratio 1:1, sputtering current 0.5A, sputtering voltage 100V, 200 DEG C of depositing temperatures.This process adopts magnetic controlled sputtering ion plating layer equipment.
Like this, form finished product 1.
Embodiment 2
Be with embodiment 1 difference:
The thickness of the WC undercoat 20 on valve matrix 10 surfaces of the superhard wear valve of this Tungsten carbite chromium nitride composite coating is 150 μ m, and the thickness of CrN top coat 30 is 3 μ m.
In its preparation method:
Step 2) in main spray parameters be: kerosene oil flow 25L/h, oxygen flow 55m
3/ h, powder feeding rate 75g/min, spray distance 330mm, single pass coating thickness is 15 μ m.
Major sedimentary parameter in step 3) is: working gas pressure 1Pa, Ar and N2 flow be by mass flowmenter control, intrinsic standoff ratio 1:2, sputtering current 1A, sputtering voltage 200V, 400 DEG C of depositing temperatures.
Like this, form finished product 2.
Embodiment 3
Be with embodiment 1 difference:
The thickness of the WC undercoat 20 on valve matrix 10 surfaces of the superhard wear valve of this Tungsten carbite chromium nitride composite coating is 260 μ m, and the thickness of CrN top coat 30 is 2 μ m.
In its preparation method:
Step 2) in main spray parameters be: kerosene oil flow 30L/h, oxygen flow 60m3/h, powder feeding rate 80g/min, spray distance 350mm, single pass coating thickness is 13 μ m.
Major sedimentary parameter in step 3) is: working gas pressure 2Pa, Ar and N2 flow be by mass flowmenter control, intrinsic standoff ratio 1:3, sputtering current 1.5A, sputtering voltage 300V, 600 DEG C of depositing temperatures.
Like this, form finished product 3.
Embodiment 4
Be with embodiment 1 difference:
The thickness of the WC undercoat 20 on valve matrix 10 surfaces of the superhard wear valve of this Tungsten carbite chromium nitride composite coating is 500 μ m, and the thickness of CrN top coat 30 is 1 μ m.
In its preparation method:
In step 2, single pass coating thickness is 10 μ m.
Major sedimentary parameter in step 3) is: working gas pressure 3Pa, sputtering current 2A, 700 DEG C of depositing temperatures.
Like this, form finished product 4.
Experimental example
Get finished product 1～4, through normal experiment,
No matter can obtain this product from hardness from upper table, the index such as wear-resisting, corrosion-resistant and friction factor is all done and is better than conventional products.
The foregoing is only the preferred embodiments of the present invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes specification of the present invention and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (2)
1. the superhard wear valve of Tungsten carbite chromium nitride composite coating, comprise valve matrix, it is characterized in that: described valve matrix surface is provided with the WC undercoat that adopts supersonic flame spraying method spraying and the CrN top coat that adopts magnetically controlled sputter method deposition from the inside to surface successively.
2. the superhard wear valve of Tungsten carbite chromium nitride composite coating according to claim 1, is characterized in that: the thickness of described WC undercoat is 50～500 μ m, and the thickness of CrN top coat is 1～5 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420195917.7U CN203906936U (en) | 2014-04-21 | 2014-04-21 | Super-hard wear-resistant valve with WC (Wolfram Carbide) and CrN (Chromium Nitride) composite coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420195917.7U CN203906936U (en) | 2014-04-21 | 2014-04-21 | Super-hard wear-resistant valve with WC (Wolfram Carbide) and CrN (Chromium Nitride) composite coating |
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| Publication Number | Publication Date |
|---|---|
| CN203906936U true CN203906936U (en) | 2014-10-29 |
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| CN201420195917.7U Expired - Fee Related CN203906936U (en) | 2014-04-21 | 2014-04-21 | Super-hard wear-resistant valve with WC (Wolfram Carbide) and CrN (Chromium Nitride) composite coating |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103953772A (en) * | 2014-04-21 | 2014-07-30 | 宁波丰基特种阀门有限公司 | Superhard wear resistant valve with WC and CrN composite coating and preparing method of same |
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2014
- 2014-04-21 CN CN201420195917.7U patent/CN203906936U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103953772A (en) * | 2014-04-21 | 2014-07-30 | 宁波丰基特种阀门有限公司 | Superhard wear resistant valve with WC and CrN composite coating and preparing method of same |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141029 Termination date: 20160421 |