CN105803385A - Valve used for steam environment and surface treatment method of valve - Google Patents
Valve used for steam environment and surface treatment method of valve Download PDFInfo
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- CN105803385A CN105803385A CN201410855840.6A CN201410855840A CN105803385A CN 105803385 A CN105803385 A CN 105803385A CN 201410855840 A CN201410855840 A CN 201410855840A CN 105803385 A CN105803385 A CN 105803385A
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Abstract
The invention provides a surface treatment method of a valve used in a steam environment. The valve comprises a first cavity (10), a second cavity (20) and a valve rod (22), wherein a locking component (23) used for locking the valve rod (22) and a hole cavity (25) used for containing the locking component (23) are arranged in the second cavity (20); the locking component (23) can move in the hole cavity (25) to two positions, and the locking component (23) and the valve rod (22) are jointed at the first position so as to achieve locking of the valve rod (22); and a certain gap is reserved between the locking component (23) at the second position and the valve rod (22) so as to release the valve rod (22). The method includes the step that the surface of the valve rod (22) and the surface of the locking component (23) are sequentially subject to reductive carbo-nitridation and chromizing treatment. By means of the valve obtained through the surface treatment method, the corrosion resistance and the abrasive resistance can be obviously improved, faults caused by the problems like rusting are avoided accordingly, and the cost can be saved.
Description
Technical field
The invention belongs to the field of surface treatment of valve, particularly to the formation of the anticorrosive wear-resistant surface layer of valve.
Background technology
Valve antirust for steam ambient is the major issue in its design and use.When the assembly in valve exposes paramount operating temperature water vapour and even corrosive atmosphere, it is likely to become seriously to get rusty.On the one hand, assembly gets rusty affects working life by the surface defect caused because of it.More seriously, get rusty and also can affect the normal mobile of assembly, thus causing valve even its place system malfunctions.One representative instance is the moving assembly in steam turbine quick-closing valve system.In order to avoid overrun rotation or other abnormal operation of turbine system, as critical safeguard protection assembly, speed is closed with by steam stream quick-make to turbine by quick-closing valve, thus avoiding the destructive damage of steam turbine system or even injury to personnel.
For quick-closing valve or choke valve, the valve speed that hit pay dirk is closed, it is necessary to assure the locking Smooth Rotation of parts and moving freely of valve rod.But, if it occur that steam-tight fault, then locking parts or adjacent component will be exposed to the mixture of high-temperature water vapor and oxygen, and seriously can get rusty within the very short time cycle.Considering to only have the little exiguous space to 0.01mm between locking parts and vestibule, assembly gets rusty and is likely to hinder the normal rotation of locking parts, and thus results in the fault of quick-closing valve.Reported the serious contingency owing to the damage of the steam turbine of quick-closing valve fault brings.
In prior art, resistance to corrosion can pass through high chromium concentration (such as rustless steel) and improve.But, high chromium concentration can cause higher material cost, does not therefore have cost efficiency.And, high chromaking temperature can cause the deformation of assembly.It is maintained with desired ductility, corrosion resistance and wearability, it is necessary to be developed for the advanced surface treatment of locking parts and adjacent component.But the long-time mobility under the high-temperature water vapor mixture with oxygen still has challenge, and is directed to the increase of assembly cost.
Additionally, vestibule (having and the assembly of the sunk surface locking parts match) for locking parts contiguous in valve pocket housing, generally being made up of cast iron (such as HT-200), its complicated shape and the height requirement for the exiguous space of 0.01mm make it be more difficult to the surface treatment carrying out including the thermal spray of ceramic coating, plating, PTFE coating etc..And the working condition that temperature is more than 250 DEG C also makes PTFE not be suitable for this application.
Summary of the invention
In order to avoid the metal parts fault caused owing to getting rusty, the invention provides the surface treatment method of a kind of valve for using in steam ambient, described valve includes: the first chamber 10, is inside provided with valve disc 11 and steam channel 12；Second chamber 20, and valve rod 22, including: the first end 221, it is positioned at the second chamber 20；With the second end 222, be positioned at the first chamber 10, be connected with valve disc 11, and actuatable valve dish 11 is turned on and off steam channel 12；Wherein being provided with the locking parts 23 for locking valve rod 22 in the second chamber 20 and for holding the vestibule 25 of locking parts 23, locking parts 23 can move to two positions in vestibule 25, engages with valve rod 22 in primary importance, it is achieved locking valve rod 22；At second position distance valve rod 22 certain interval, it is achieved unclamping valve rod 22, described method includes: the surface of valve rod 22 and locking parts 23 is sequentially carried out reductive carbo-nitridation and chromate treating.
Carry out chromate treating after reductive carbo-nitridation again can obtain and the rich much the same corrosion resistance of Cr steel and wearability, but the rich Cr Steel material of costliness need not be adopted to replace, thus greatly reducing the cost of this assembly.Additionally, carry out chromate treating again after nitrogenizing pretreatment by carbon, it is possible to enable chromaking to reach enough process degree of depth (such as 100 to 300 microns).Yet further, after carbon nitrogenizes pretreatment, it is possible to carry out chromate treating at a lower temperature, such as optionally greater than 500 DEG C to lower than 800 DEG C, it is preferable that 500 to 750 DEG C, when nitrogenizing pretreatment without carbon, obtain the deeper chromaking degree of depth, it is necessary at least 800 DEG C.The treatment temperature reduced can avoid the deformation of the metal parts that high-temperature process may result in further.In one preferred embodiment, described chromate treating temperature is 550-700 DEG C.The treatment temperature reduced is not only able to avoid the deformation of possible assembly, additionally it is possible to reduce cost further.
In one preferred embodiment, after described chromate treating, nitrogen treatment is carried out further.Nitrogen treatment after chromate treating can improve the hardness of coating, stability, corrosion resistance and wearability further, and what contact directly below due to nitration case is chromizing layer, without the oxidation produced owing to the crystal boundary passage formed during nitrogen treatment causes with get rusty.
In one preferred embodiment, lining 29 it is further provided with outside valve rod 22, locking parts 23 realize the locking to valve rod 22 by locking bushing 29, and the surface of described lining is sequentially carried out reductive carbo-nitridation and chromate treating further, more preferably further nitrogen treatment.Specifically, lining 29 and valve rod 22 interfix, it is possible to form the groove coordinated with locking parts 23 on lining 29 so that locking parts can locking valve rod, thus avoiding direct formation groove on valve rod and reducing the impact of its mechanical strength.And when there is no lining, it is necessary on valve rod, produce the groove coordinated with locking parts 23, to form the locking parts locking to valve rod.
In one preferred embodiment, described method farther includes: the inner surface that vestibule 25 is coordinated with locking parts 23, forms Ni-P alloy coat by chemical plating.In one preferred embodiment, the inner surface that the second chamber 20 coordinates with valve rod 22 also passes through chemical plating and forms Ni-P alloy coat.The assembly of assembly or complicated shape for having sunk surface, for instance vestibule 25, spring 282, housing 21 inner surface and gear 30 etc., above-mentioned chromate treating is likely difficult to enforcement.And antirust for valve, due to gap only small (little of 0.01mm) between the assembly (such as locking parts 23 and vestibule 25) worked in coordination, so either party gets rusty is likely to cause the fault of valve.Therefore, in a preferred version of the present invention, vestibule 25 be have employed with the locking inner surface that coordinates of parts 23 chemical plating and carry out Ni-P alloy coat it is carried out surface treatment, so that it avoids getting rusty on contact surface of parts 23 with locking.Ni-P alloy coat can improve corrosion resistance and the wearability of the assemblies such as vestibule inner surface and shell inner surface.And, chemical plating process of the present invention can prepare the coating with uniform quality and uniform thickness, even having the assembly (surface that coordinates such as vestibule inner surface, the second chamber, gear etc.) of labyrinth with valve rod, the coating layer thickness on its surface and quality still can be highly uniform.Research shows, when drying and lubricate, the Ni-P alloy coat of chemical plating can reach the wearability of hard chrome.And Ni-P alloy coat is enough to resist the corrosion that water vapor is brought, thus bringing enough corrosion resistances for above-mentioned surface.
In one preferred embodiment, in forming the plating solution of chemical plating of described Ni-P alloy coat, solid lubricant particle is added.Kollag can improve corrosion resistance and the wearability of metal parts further.For to the consideration using environment and high-temperature water vapor working condition, currently preferred kollag is CaF2Or fluorographite.Relative to conventional MoS2Lubricant, under the wet environment that water vapour causes, CaF2Or fluorographite has less coefficient of friction.
In one preferred embodiment, described solid lubricant particle (such as CaF2) particle diameter less than 8 microns, content is 3～6wt% based on Ni-P alloy coat weight.The effect of kollag is in that in alloy coat to form self-lubricating composite coating, if particle diameter is excessive, it is possible to the coefficient of friction that can make self-lubricating composite coating is bigger.The self-lubricating composite coating that lubricant particle less than 8 microns obtains has less coefficient of friction.If it addition, the amount of kollag is excessive, it is possible to the stability of Ni-P alloy coat can be affected, and if too small, then be likely to not have the technique effect of lubricating layer.In the present invention, it is preferred to solid lubricant particle content is 3～6wt% based on Ni-P alloy coat weight, to obtain more stable, the better Ni-P alloy coat of anti-wear performance.
In one preferred embodiment, described valve is quick-closing valve.The working environment of quick-closing valve is in high-temperature water vapor, just because of this working environment, causes that it is prone to get rusty.And quick-closing valve get rusty for whole system, serious safety problem can be caused, therefore, method of the invention is particularly suitable for quick-closing valve system.
Present invention also offers a kind of valve used in steam ambient, including:
In, the plating solution of described chemical plating comprises kollag further, it is preferable that CaF2Or fluorographite.The advantages such as this type of kollag can form self-lubricating composite coating after adding, and it has coating temperature subject range width, and load resistance can be higher, and greasy property is stable, it is possible to be applied in fine vacuum, organic solvent, steam, highly basic, acid medium.Further, relative to conventional MoS2Lubricant, under the wet environment that water vapour causes, CaF2Or fluorographite has less coefficient of friction.
In a further preferred embodiment, the particle diameter of described solid lubricant particle is less than 8 microns, and content is the 3-6wt% based on described Ni-P alloy coat weight.Solid lubricant particle less than 8 microns can obtain the self-lubricating composite coating with less coefficient of friction.If it addition, the amount of kollag is excessive, it is possible to the stability of Ni-P alloy coat can be affected, and if too small, then be likely to not have the technique effect of lubricating layer.In the present invention, it is preferred to solid lubricant particle content is 3～6wt% based on Ni-P alloy coat weight, obtain more stable, the better Ni-P alloy coat of anti-wear performance.
Accompanying drawing explanation
Fig. 1 is the structural representation of the valve according to one embodiment of the present invention；
Fig. 2 is the structural representation of the valve according to a preferred embodiment of the invention；
Fig. 3 is the surface treatment process schematic diagram of the locking parts according to one embodiment of the present invention and valve rod 22, wherein Fig. 3 A is valve rod 22 cross-sectional before treatment, Fig. 3 B carries out valve rod 22 cross-sectional after carbon nitrogenizes, Fig. 3 C is valve rod 22 cross-sectional after further chromaking, and Fig. 3 D is valve rod 22 cross-sectional after nitrogenizing further；
Fig. 4 has Ni-P alloy coat and does not have the comparison diagram of rate of corrosion of carbon steel of this coating；
Fig. 5 is that the method according to an embodiment of the invention chemical plating forms Ni-P-CaF on vestibule 25 inner surface2The schematic diagram of protective layer, wherein Fig. 5 A is vestibule 25 cross-sectional before treatment, and Fig. 5 B is for forming Ni-P-CaF2Vestibule 25 cross-sectional after protective layer.
The title of all parts and numbered list in figure:
First chamber 10, valve disc 11, steam channel 12, the second chamber 20, housing 21, vestibule 25, sealing member 27, valve rod 22, the first end 221 of valve rod, the second end 222 of valve rod, lock parts 23, lining 29, spring assembly 28, spring base 281, spring 282, gear 30, handwheel 50.
Wherein Fig. 1 and Fig. 2 25 is the cross sectional representation of vestibule, vestibule 25 holds locking parts 23, making to lock parts 23 can be freely rotatable in vestibule 25, and lock parts 23 and can stretch out a part and the groove clamping on valve rod 22 or lining 29 from vestibule, thus realizing the locking to valve rod 22.
Detailed description of the invention
For valve, antirust is one of essential condition of must being fulfilled for all the time.Particularly for the valve (referring to Fig. 1 and Fig. 2) in steam ambient, for instance quick-closing valve, the gap between its moving assembly is even little of 0.01mm, once get rusty, may result in it and moving and be obstructed, causing the fault of whole system.Additionally, due to the high-temperature water vapor environment of its work, quick-closing valve is higher for antirust requirement.
Relative to directly forming nitration case at moving assembly, the antirust coat corrosion resistance that the surface treatment of the present invention obtains is better, and more stable.Fe2-3N is highly brittle mutually, and the controllability therefore controlled by low content is poor, or easily removes via surface finish.And, with compared with the same metal of nitrogen treatment, the metal nitrogenized has the corrosion resistance of reduction, and this is owing to along the passage of crystal boundary formed during nitriding process, can via the oxygen replacement to nitrogen accelerated oxidation and getting rusty.
In present disclosure, design different surface treatment methods and be respectively used to the different assemblies of valve: nitrogenize the assembly with chromaking for carbon can be carried out, for instance valve rod 22 and locking parts 23, be sequentially carried out carbon and nitrogenize the surface treatment with chromaking；And for nitrogenizing the assembly with chromaking owing to structure needs to carry out carbon, such as vestibule 25, gear 30 and the second chamber 20, chemical plating is utilized to form Ni-P alloy coat, so that the moving assembly in valve can improve corrosion resistance while keeping high-wearing feature.Especially for quick-closing valve or choke valve, the invention provides simple and inexpensive solution to avoid getting rusty of key component, it is to avoid high material alternative costs.
For the lining on locking parts, valve rod and valve rod, optional surface chromaking improves corrosion resistance.But, there is the conventional chromaking technique of high disposal temperature unlike routine, in the present invention, first these assemblies process to promote follow-up chromaking process with carbon nitriding process, first carry out carbon nitriding process and can speed up chromaking process, to obtain enough chromaking degree of depth, thus ensureing its corrosion resistance and stability, chromate treating temperature can also be reduced simultaneously.Further plasma nitridation process can improve the stability of chromizing layer further in short-term, and improves uniformity, and improves corrosion resistance and wearability further, referring to Fig. 3 A to Fig. 3 D.
Consider the complicated shape of the parts (with valve rod compatible portion in such as vestibule 25, gear 30 or the second chamber housing 21) of contiguous locking parts or valve rod, it is possible to adopt the different surface treatment method of chemical plating.The corrosion resistance that can be chosen with and wearability are even above the Ni-P alloy electroplating Cr layer.As shown in Figure 4, in oxygen saturation water, Ni-P alloy presents the rate of corrosion extremely reduced to the strong corrosion resistant of Ni-P alloy protecting layer.Even extremely complex structure, chemical deposit also can present uniform thickness and quality.The nickel utilization rate of chemical nickel plating is high, and has the feature of " all-pervasive ", and no matter how complicated structure is, as long as plating solution can touch, just has coating to cover, the problem being absent from plating covering power and the poor dispersion caused because electrical distribution is uneven.Even the inner surface in the blind hole of plating piece, pipeline and gap, it is also possible to obtain uniform coating.By stablizing controlled coating speeds, the integral thickness of coating also is able to well control in the scope of 20 to 300 μm, to meet the height requirement of the small spaces of 0.01mm.Brittleness in order to reduce coating is maintained with sufficiently high corrosion resistance and wearability, it is possible to selects the Ni-P alloy with 5-10wt%P for chemical plating, carries out the temperature heat treatment lower than 300 DEG C subsequently.
Other kollag can be used in improving further corrosion resistance and wearability.Conventional MoS2Lubricant can present the coefficient of friction of raising under wet environment, when being particularly exposed to water vapour.In consideration of it, the preferred embodiment of the present invention have employed Ni-P alloy and CaF2The combination of solid lubricant particle, the particle diameter of this lubricant particle is less than 8 microns, and content is 3-6wt%, by adding this lubricant in the plating solution of above-mentioned chemical plating, this combination is formed on HT-200 assembly.Obtained Ni-P-CaF2Coating can present the corrosion resistance of excellence, even and if also having good lubrication property at the temperature higher than 550 DEG C.The schematic diagram of this coating is referring to Fig. 5.
The surface treatment method of present invention design can not only be used for avoiding the fault of quick-closing valve, additionally it is possible to is used for avoiding other assemblies getting rusty under high-temperature vapor working condition, particularly moving assembly, for instance alligator etc..
Below in association with specific embodiment, embodiments of the present invention are carried out exemplary description, but these embodiments are not meant to any degree limitation of the invention.
Embodiment 1
Select the locking parts of quick-closing valve, valve rod and lining, it be sequentially carried out following process:
1, carbon nitrogenizes.These locking parts, valve rod and lining adopt ion carbonitriding technique to carry out surface carbon and nitrogenize, such that it is able to the carbon reaching at a lower temperature to need nitrogenizes the degree of depth.Equipment adopts the vacuum drying oven with glow discharge device, and nitriding atmosphere adopts ammonia, and carburizing medium can be selected for acetone or propane.Specifically processing parameter area: voltage 600～900V, air pressure 50～200Pa, temperature 500～600 DEG C, the process time is 5～20 hours.
2, chromaking.Chromising adopts chlorination salt bath chromizing technique, is mainly composed of CaCl2, NaCl, CrCl3, iron powder and chromium powder.Salt temperature adopts 500-750 DEG C, and the process time is 5～20 hours.
3, nitrogenize,.Adopting the vacuum drying oven with glow discharge device to carry out ionic nitriding, nitriding atmosphere adopts ammonia.Specifically processing parameter area: voltage 400～800V, air pressure 300～600Pa, temperature 450～650 DEG C, the process time is 1～3 hour.)
Embodiment 2
For the cylinder iron one-time formed vestibule inner surface corresponding with locking parts, carry out Ni-P chemical plating coating process.Chemical plating fluid consists of: NiSO4.6H2O (10～30g/L), NaH2PO2.2H2O (15～30g/L), HBO3(10～20g/L), lactic acid (10～30ml/L), KIO3(2～3mg/L), and CaF2Powder.The pH value range of plating solution may be selected to be 4.5～5.5, temperature 80～90 DEG C, CaF2Content 3-6wt%.Wherein CaF2Powder requires that mean diameter is less than 8 microns, it is preferable that less than 2 microns.Process time thickness of coating as requested and plating quick decision are fixed, and plating speed is approximately 10～30 micro-ms/h.
Comparative example 1
Select valve rod and locking parts, be made directly chromate treating, treatment temperature 850 DEG C.
Comparative example 2
Select valve rod and locking parts, be made directly nitrogen treatment.
Antirust result detects
At high-temperature water vapor 500-550 DEG C of analog operation environment, 150-500 hour, detect antirust effect.Result is as shown in table 1.
Table 1
Comparative example 1 is owing to being made directly chromaking, not only chromaking temperature is higher, and in the identical time, its chromaking degree of depth is lower than 20 to 50 microns, well below the chromaking degree of depth (100 to 300 microns) of the present invention, also it is not enough to the corrosion of antagonism high-temperature water vapor simultaneously, causes that parts get rusty.
Comparative example 2 is relatively big due to fragility, and the passage of the crystal boundary owing to being formed during nitriding process, the accelerated oxidation and getting rusty via the oxygen replacement to nitrogen, presents poor corrosion-resistant and anti-wear performance.
And the embodiment of the present invention 1 and 2 is not only less costly, also present higher corrosion resistance and anti-wear performance.
The valve rod that embodiment 1 respectively obtained with 2, locking parts, together with vestibule, are assembled into valve together with other building blocks of valve. and this valve comprises: the first chamber 10, is inside provided with valve disc 11 and steam channel 12；Second chamber 20, including housing 21 and the sealing member 27 that is fixed on housing 21, sealing member 27 is used for isolating the first chamber 10 and the second chamber 20, valve rod 22, including: the first end 221, it is positioned at the second chamber 20；With the second end 222, be positioned at the first chamber 10, be connected with valve disc 11, and actuatable valve dish 11 is turned on and off steam channel 12；Wherein being provided with the locking parts 23 for locking valve rod 22 in the second chamber 20 and for holding the vestibule 25 of locking parts 23, locking parts 23 can move to two positions in vestibule 25, engages with valve rod 22 in primary importance, it is achieved locking valve rod 22；At second position distance valve rod 22 certain interval, it is achieved unclamp valve rod 22, wherein, the surface of valve rod 22 and locking parts 23 be nitrogenize through carbon, chromaking and nitrogenize the surface after processing successively, vestibule 25 inner surface is for form Ni-P-CaF by chemical plating2The inner surface of alloy coat.
In this valve intermediate gap, the little locking parts to 0.01mm and vestibule are surface-treated anticorrosive wear-resistant surface, therefore, it is possible to the long period that works in steam ambient is without getting rusty, without the fault causing valve.It addition, the antirust treatment of valve rod to it also avoid its accident caused of getting rusty locked, it is to avoid the fault of valve.The valve processed via the present invention avoids the fault caused of getting rusty that prior art is easiest to occur.
From the above results, technical scheme not only provides cost savings, and further improves metal parts, the corrosion resistance of special moving assembly and wearability.Advantages of the present invention may be summarized as follows:
1, the scheme that the present invention relates to can significantly improve corrosion resistance and the wearability of valve, particularly valve member, thus avoiding possible valve (such as quick-closing valve) fault；
2, the solution of the present invention will not relate to expensive rich Cr steel alternate material；
3, locking parts and stem member are carried out surface treatment by having the surface chromaking of pre-reductive carbo-nitridation by the present invention such that it is able to obtain enough process degree of depth；
4, the surface chromaking of the present invention can also reduce treatment temperature, to avoid possible component strain；
5, the present invention have follow-up after the surface chromaking that nitrogenizes can improve stability and performance further；
6, the chemical plating Mi-P alloy of the present invention can improve corrosion resistance and the wearability of cast iron assembly；
7, the chemical plating process of the present invention can be used in preparing the protection coating with homogeneous quality uniform thickness, even if also can obtain uniform coating in labyrinth；
8, the present invention utilizes CaF2The composite deposite that lubricated granules is formed can present the corrosion resistance of excellence and good greasy property simultaneously；
9, the surface treatment method of the present invention is used not only for avoiding the fault of valve (such as quick-closing valve), additionally it is possible to be used for avoiding other assemblies, particularly moving assembly to get rusty under high-temperature water vapor working condition.
Above by accompanying drawing and preferred embodiment, the present invention having carried out detail display and explanation, but the invention is not restricted to these embodiments having revealed that, other schemes that those skilled in the art therefrom derive are also within protection scope of the present invention.
Claims (17)
1. a surface treatment method for the valve used in steam ambient, described valve includes:
First chamber (10), is inside provided with valve disc (11) and steam channel (12)；
Second chamber (20), and
Valve rod (22), including: the first end (221), it is positioned at the second chamber (20)；With the second end (222), be positioned at the first chamber (10), be connected with valve disc (11), and actuatable valve dish (11) is turned on and off steam channel (12)；
Second chamber (20) is wherein provided with the locking parts (23) for locking valve rod (22) and is used for holding the vestibule (25) of locking parts (23), locking parts (23) can move to two positions in vestibule (25), engage with valve rod (22) in primary importance, it is achieved locking valve rod (22)；At second position distance valve rod (22) certain interval, it is achieved unclamping valve rod (22), described method includes:
The surface of valve rod (22) and locking parts (23) is sequentially carried out reductive carbo-nitridation and chromate treating.
2. surface treatment method as claimed in claim 1, carries out nitrogen treatment further after wherein said chromate treating.
3. surface treatment method as claimed in claim 1, lining (29) it is additionally provided with outside wherein said valve rod (22), locking parts (23) realizes the locking to valve rod (22) by locking bushing (29), and described method farther includes the surface of lining (29) is sequentially carried out reductive carbo-nitridation and chromate treating.
4. surface treatment method as claimed in claim 1, wherein said chromate treating temperature range is to lower than 800 DEG C be more than or equal to 500 DEG C.
5. surface treatment method as claimed in claim 1, described method farther includes: the inner surface that vestibule (25) is coordinated with locking parts (23) forms Ni-P alloy coat by chemical plating.
6. surface treatment method as claimed in claim 5, the inner surface farther including the second chamber (20) is coordinated with valve rod (22) forms Ni-P alloy coat by chemical plating.
7. surface treatment method as claimed in claim 5, wherein adds solid lubricant particle in the plating solution of described chemical plating.
8. surface treatment method as claimed in claim 7, the particle diameter of wherein said solid lubricant particle is less than 8 microns, and content is the 3-6wt% based on Ni-P alloy coat weight.
9. surface treatment method as claimed in claim 7 or 8, wherein said kollag is CaF2Or fluorographite.
10. the valve used in steam ambient, including:
First chamber (10), is inside provided with valve disc (11) and steam channel (12)；
Second chamber (20), including housing (21) and the sealing member (27) that is fixed on housing (21), sealing member (27) is used for isolating the first chamber (10) and the second chamber (20)
Valve rod (22), including: the first end (221), it is positioned at the second chamber (20)；With the second end (222), be positioned at the first chamber (10), be connected with valve disc (11), and actuatable valve dish (11) is turned on and off steam channel (12)；
Second chamber (20) is wherein provided with the locking parts (23) for locking valve rod (22) and is used for holding the vestibule (25) of locking parts (23), locking parts (23) can move to two positions in vestibule (25), engage with valve rod (22) in primary importance, it is achieved locking valve rod (22)；At second position distance valve rod (22) certain interval, it is achieved unclamp valve rod (22),
Wherein, the surface of valve rod (22) and locking parts (23) is nitrogenize the surface after processing successively with chromaking through carbon.
11. valve as claimed in claim 10, wherein the surface of valve rod (22) and locking parts (23) is the surface after being nitridized process further.
12. valve as claimed in claim 10, wherein it is additionally provided with lining (29) outside valve rod (22), locking parts (23) realizes the locking to valve rod (22) by locking bushing (29), and lining (29) surface is nitrogenize the surface after processing successively with chromaking through carbon.
13. valve as claimed in claim 10, wherein, vestibule (25) inner surface coordinated with locking parts (23) has Ni-P alloy coat.
14. valve as claimed in claim 13, the inner surface of the second chamber (20) wherein coordinated with valve rod (22) has Ni-P alloy coat.
15. the valve as described in claim 13 or 14, wherein said Ni-P alloy coat comprises kollag.
16. the valve as described in claim 13 or 14, wherein said kollag is CaF2Or fluorographite.
17. valve as claimed in claim 15, the particle diameter of wherein said solid lubricant particle is less than 8 microns, and content is the 3-6wt% based on described Ni-P alloy coat weight.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112145784A (en) * | 2020-09-22 | 2020-12-29 | 张尚斌 | Compensation type manual valve wear-resistant anticorrosive coating |
| CN114807832A (en) * | 2022-01-25 | 2022-07-29 | 中国科学院宁波材料技术与工程研究所 | High-temperature alloy surface treatment method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3652055A (en) * | 1970-11-24 | 1972-03-28 | Carrier Corp | Valve construction |
| CN1966771A (en) * | 2005-11-17 | 2007-05-23 | Bsh博施及西门子家用器具有限公司 | Water used household appliance |
| CN101195913A (en) * | 2007-01-25 | 2008-06-11 | 桂林电子科技大学 | Technique for forming chromium carbon nitrogen surface alloying layer by plasma composite process low-temperature |
| JP2008223907A (en) * | 2007-03-13 | 2008-09-25 | National Institute Of Advanced Industrial & Technology | Back pressure regulating valve |
| KR20100004611U (en) * | 2008-10-27 | 2010-05-07 | 한국서부발전 주식회사 | main steam control valve for steam turbine |
| CN201891919U (en) * | 2010-09-09 | 2011-07-06 | 扬中市阀门厂有限公司 | Wear resistant and corrosion resistant valve rod |
| CN102338228A (en) * | 2010-07-15 | 2012-02-01 | 芜湖市金贸流体科技股份有限公司 | Rapid closure gate valve |
-
2014
- 2014-12-31 CN CN201410855840.6A patent/CN105803385B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3652055A (en) * | 1970-11-24 | 1972-03-28 | Carrier Corp | Valve construction |
| GB1299039A (en) * | 1970-11-24 | 1972-12-06 | Carrier Corp | Valve construction |
| CN1966771A (en) * | 2005-11-17 | 2007-05-23 | Bsh博施及西门子家用器具有限公司 | Water used household appliance |
| CN101195913A (en) * | 2007-01-25 | 2008-06-11 | 桂林电子科技大学 | Technique for forming chromium carbon nitrogen surface alloying layer by plasma composite process low-temperature |
| JP2008223907A (en) * | 2007-03-13 | 2008-09-25 | National Institute Of Advanced Industrial & Technology | Back pressure regulating valve |
| KR20100004611U (en) * | 2008-10-27 | 2010-05-07 | 한국서부발전 주식회사 | main steam control valve for steam turbine |
| CN102338228A (en) * | 2010-07-15 | 2012-02-01 | 芜湖市金贸流体科技股份有限公司 | Rapid closure gate valve |
| CN201891919U (en) * | 2010-09-09 | 2011-07-06 | 扬中市阀门厂有限公司 | Wear resistant and corrosion resistant valve rod |
Non-Patent Citations (1)
| Title |
|---|
| 李宁等: "《化学镀镍基合金理论与技术》", 31 May 2000, 哈尔滨工业大学出版社 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112145784A (en) * | 2020-09-22 | 2020-12-29 | 张尚斌 | Compensation type manual valve wear-resistant anticorrosive coating |
| CN112145784B (en) * | 2020-09-22 | 2022-05-31 | 丽水红宇阀门有限公司 | Compensation type manual valve wear-resistant anticorrosive coating |
| CN114807832A (en) * | 2022-01-25 | 2022-07-29 | 中国科学院宁波材料技术与工程研究所 | High-temperature alloy surface treatment method |
| CN114807832B (en) * | 2022-01-25 | 2024-01-05 | 中国科学院宁波材料技术与工程研究所 | High-temperature alloy surface treatment method |
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| CN105803385B (en) | 2018-11-06 |
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