CN108857266A - A kind of gate sealing surface processing technology and welding tooling - Google Patents
A kind of gate sealing surface processing technology and welding tooling Download PDFInfo
- Publication number
- CN108857266A CN108857266A CN201710704791.XA CN201710704791A CN108857266A CN 108857266 A CN108857266 A CN 108857266A CN 201710704791 A CN201710704791 A CN 201710704791A CN 108857266 A CN108857266 A CN 108857266A
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- China
- Prior art keywords
- substrate
- welding
- processing technology
- sealing surface
- surface processing
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/001—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass valves or valve housings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
-
- 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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
- F16K3/314—Forms or constructions of slides; Attachment of the slide to the spindle
Abstract
The present invention relates to a kind of gate sealing surface processing technology and welding tooling, gate sealing surface processing technology includes the following steps, a)Using forging and the plate Jing Guo modifier treatment is as substrate;b)Substrate is fixed on welding tooling;c)Using spray welding process, the metal-powder coating that surfacing uses is Ni60+ chromium carbide, and wherein the mass fraction of chromium carbide is 15%-65%, and the sealant thickness formed after fusion of metal powder is more than or equal to 2mm;d)Stress relief annealing is simultaneously machined out.The sealant thickness formed after fusion of metal powder is more than or equal to 2mm, and Rockwell hardness HRC is all larger than 60, and sealing layer surface is uniform and smooth, does not have the defects of crackle.It can not be into increasing the thickness of sealant using above-mentioned technique, and the hardness of sealant is also added, substantially increase the service life of flashboard.
Description
Technical field
The present invention relates to valve fields, and in particular to a kind of gate sealing surface processing technology and welding tooling.
Background technique
Closure member of the flashboard as gate valve, the sealing row between flashboard and valve body, which just seems, to be even more important, and existing
The sealing surface of valve plate is formed by the two sides built-up welding wlding in flashboard mostly, if application publication number is in 102506188 A of CN
The processing technology of a kind of interchangeable flashboard and valve body sealing surface of state's invention patent application publication, the processing technology of ram seal plate
First to cast plate, then the two sides of plate carry out built-up welding again, are finally machined out.
Built-up welding is most commonly that stellite, and the hardness of stellite is lower, Rockwell hardness(HRC)45 or so,
Cause wear-resisting property poor, the service life for having often resulted in flashboard is lower.There are also producer flashboard two sides built-up welding carbon
Change tungsten, but due to the performance of tungsten carbide material itself, the thickness of carbide layers is generally in 0.5mm or so, the thickness of tungsten carbide
Increase the cracking tendency that will increase carbide layers, also returning causes the service life of flashboard to reduce.
Summary of the invention
The object of the present invention is to provide the thick gate sealing surface processing technologys that one kind can increase flashboard service life;Together
When, the object of the invention is also to provide welding toolings used in one kind also processing technology.
To achieve the above object, a kind of gate sealing surface processing technology of the invention adopts the following technical scheme that:A kind of lock
Plate sealing surface processing technology, includes the following steps,
a)Using forging and the plate Jing Guo modifier treatment is as substrate;
b)Substrate is fixed on welding tooling;
c)Using spray welding process, the metal-powder coating that surfacing uses is Ni60+ chromium carbide, and wherein the mass fraction of chromium carbide is
15%-65%, the sealant thickness formed after fusion of metal powder are more than or equal to 2mm;
d)Stress relief annealing is simultaneously machined out.
C in the claim 1)The mass fraction of chromium carbide is 35% in step.
B in the claim 1)Step and c)Between step when the carbon equivalent of substrate is more than or equal to 0.6%, in base
Heap is welded with stainless steel material transition zone on plate.
The substrate uses single side surfacing, and the quantity of substrate is two, and the sealant of two substrates is disposed opposite to each other and carries out
It is welded to connect.
The material of the substrate is 15CrMo.
A kind of technical solution of welding tooling of the invention is as follows:A kind of welding tooling, including rotary table rotate work
Make to be connected with support plate on platform, be provided in support plate for the connection structure with substrate releasable connection, which also wraps
The welding gun being located above support plate is included, welding gun is for carrying out heating fusing to the metal-powder coating on substrate.
The quantity of the welding gun is the multiple and circumferentially distributed top in support plate, rotation of each welding gun apart from rotary table
The distance between shaft axis is different.
The welding tooling further includes the welding gun driving device moved radially for driving welding gun along rotary table.
The connection structure include the bolt penetration hole being set in support plate and for be threaded onto it is in bolt penetration hole and with
The connection bolt that substrate is threadedly coupled.
Beneficial effects of the present invention:The metal-powder coating that surfacing uses is Ni60+ chromium carbide, the mass fraction of chromium carbide
For 15%-65%, the sealant thickness formed after fusion of metal powder is more than or equal to 2mm, and Rockwell hardness HRC is all larger than 60, and
It is uniform and smooth to seal layer surface, does not have the defects of crackle.Using above-mentioned technique can not into the thickness for increasing sealant, and
The hardness for also adding sealant substantially increases the service life of flashboard.
Detailed description of the invention
Fig. 1 is a kind of a kind of structural schematic diagram of embodiment of welding tooling of the invention;
Fig. 2 is the structural schematic diagram of flashboard;
Fig. 3 is the top view of Fig. 2.
Specific embodiment
A kind of processing technology of gate sealing surface is a)Using forging and the plate Jing Guo modifier treatment is as substrate 3;b)
Substrate 3 is fixed on welding tooling;c)Using spray welding process, the metal-powder coating that surfacing uses is Ni60+ chromium carbide,
The mass fraction of middle chromium carbide is 35%, and the sealant formed after fusion of metal powder is with a thickness of 2mm;d)Stress relief annealing is gone forward side by side
Row machining.The material of substrate is 15CrMo, and the welding performance of carbon equivalent 0.361, substrate 3 is good, directly in the side of substrate 3
Metal-powder coating is arranged in face, carries out heating fusing metal-powder coating, Rockwell hardness HRC64 by welding gun 4.Flashboard includes
Two substrates 3 of split settings, the sealant on two substrates 3, which is disposed opposite to each other and passes through, to be welded together, two substrates 3
Welding position is respectively provided with 4 × 45 ° of chamfering, and two substrates 3 are first symmetrically evenly distributed with spot welding, are then fully welded again, avoid rosin joint and stomata.
In a kind of other embodiments of gate sealing surface processing technology of the invention, the mass fraction of chromium carbide may be
15% and 65%, with a thickness of 2mm, Rockwell hardness is all larger than 60 at this time;The thickness of sealant can also be greater than 2mm, such as 2.5mm or
3mm;When substrate uses other metal materials, built-up welding stainless steel transition zone is selected according to the size of carbon equivalent, when the carbon of substrate
When equivalent is more than or equal to 0.6%, heap is welded with stainless steel material transition zone on substrate, when the carbon equivalent of substrate is less than 0.6%,
Transition zone is not provided on substrate.
A kind of embodiment of welding tooling of the invention:As shown in Figure 1-Figure 3, including rotary table 1, rotary table
Support plate 2 is connected on 1, flashboard includes two substrates 3 of split settings, and the sealant on two 3 plates of base is disposed opposite to each other and leads to
It crosses and is welded together, two 3 welding positions of substrate are respectively provided with 4 × 45 ° of chamfering, and two substrates 3 are first symmetrically evenly distributed with spot welding,
Then it is fully welded again, avoids rosin joint and stomata.It is provided with bolt penetration hole in support plate 2, is provided on each substrate 3 and bolt penetration hole
Corresponding connecting hole 6, connection bolt is coated in bolt penetration hole, and bolt penetration hole, connecting hole and connection bolt are formed together connection
Structure.
The welding tooling further includes the welding gun 4 positioned at 2 top of support plate, and welding gun 4 is used to apply the metal powder on substrate 3
Layer carries out heating fusing, and the quantity of welding gun 4 is the multiple and circumferentially distributed top in support plate 2, and each welding gun 4 is apart from rotary work
The distance between the rotation axis of platform 1 is different.
In a kind of other embodiments of welding tooling of the invention, welding gun can be movable, and welding tooling also wraps at this time
Include the welding gun driving device moved radially for driving welding gun along rotary table, at this time the quantity of welding gun can as needed into
Row is adjusted, such as can be 1 or 2;Attachment device may be the substrate kiss for the opening upwards being set in support plate
The card slot of installation is closed, is provided with Top fastening screw on the cell wall of card slot.
Claims (9)
1. a kind of gate sealing surface processing technology, it is characterised in that:Include the following steps,
Using forging and the plate Jing Guo modifier treatment is as substrate;
Substrate is fixed on welding tooling;
Using spray welding process, the metal-powder coating that surfacing uses is Ni60+ chromium carbide, and wherein the mass fraction of chromium carbide is
15%-65%, the sealant thickness formed after fusion of metal powder are more than or equal to 2mm;
Stress relief annealing is simultaneously machined out.
2. gate sealing surface processing technology according to claim 1, it is characterised in that:C in the claim 1)Step
The mass fraction of chromium carbide is 35% in rapid.
3. gate sealing surface processing technology according to claim 1, it is characterised in that:B in the claim 1)Step
Rapid and c)Between step when the carbon equivalent of substrate is more than or equal to 0.6%, heap is welded with stainless steel material transition zone on substrate.
4. gate sealing surface processing technology according to claim 1, it is characterised in that:The substrate uses single side surfacing,
The quantity of substrate is two, and the sealant of two substrates is disposed opposite to each other and is welded to connect.
5. gate sealing surface processing technology according to claim 1, it is characterised in that:The material of the substrate is
15CrMo。
6. a kind of welding tooling, it is characterised in that:Including rotary table, support plate, support plate are connected on rotary table
On be provided with for the connection structure with substrate releasable connection, which further includes the welding gun above the support plate, weldering
Rifle is for carrying out heating fusing to the metal-powder coating on substrate.
7. welding tooling according to claim 6, it is characterised in that:The quantity of the welding gun be it is multiple and it is circumferentially distributed in
The top of support plate, the distance between the rotation axis of each welding gun apart from rotary table are different.
8. welding tooling according to claim 6, it is characterised in that:The welding tooling further includes for driving welding gun edge
The welding gun driving device of rotary table moved radially.
9. welding tooling according to claim 6, it is characterised in that:The connection structure includes being set in support plate
Bolt penetration hole and for being threaded onto connection bolt that is in bolt penetration hole and being threadedly coupled with substrate.
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CN201710704791.XA CN108857266A (en) | 2017-08-17 | 2017-08-17 | A kind of gate sealing surface processing technology and welding tooling |
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CN201710704791.XA CN108857266A (en) | 2017-08-17 | 2017-08-17 | A kind of gate sealing surface processing technology and welding tooling |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109915613A (en) * | 2019-03-25 | 2019-06-21 | 苏州纽威阀门股份有限公司 | A kind of flashboard remelting spray welding process and flashboard |
CN117265455A (en) * | 2023-11-22 | 2023-12-22 | 上海开维喜阀门有限公司 | Thermal spraying process for wear-resistant valve plate with flow guiding device |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109915613A (en) * | 2019-03-25 | 2019-06-21 | 苏州纽威阀门股份有限公司 | A kind of flashboard remelting spray welding process and flashboard |
CN117265455A (en) * | 2023-11-22 | 2023-12-22 | 上海开维喜阀门有限公司 | Thermal spraying process for wear-resistant valve plate with flow guiding device |
CN117265455B (en) * | 2023-11-22 | 2024-01-23 | 上海开维喜阀门有限公司 | Thermal spraying process for wear-resistant valve plate with flow guiding device |
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Application publication date: 20181123 |