CN109514185A - A method of valve seat is processed using welding procedure - Google Patents
A method of valve seat is processed using welding procedure Download PDFInfo
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- CN109514185A CN109514185A CN201710844520.4A CN201710844520A CN109514185A CN 109514185 A CN109514185 A CN 109514185A CN 201710844520 A CN201710844520 A CN 201710844520A CN 109514185 A CN109514185 A CN 109514185A
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- Prior art keywords
- valve seat
- welding
- carried out
- groove
- finished product
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Classifications
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- 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
- B23P15/002—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass valves or valve housings poppet valves
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
Abstract
The invention discloses a kind of methods processed using welding procedure to valve seat, comprising the following steps: forging stock；It is rough turn；Plasma surfacing；Destressing processing；Smart car；It examines.The present invention solves the problems, such as that iron-content increases in valve seat and the amount containing cobalt of valve seat is relatively low, so that Fe≤8% in valve seat, hardness raising, HRC >=38, have the characteristics that wear resistance and corrosion resistance is good, anti-oxidant and red good in thermal property, and process costs are low, and it is simple to operate, improve production efficiency.
Description
Technical field
The invention belongs to valve industries, and in particular to be a kind of method processed using welding procedure to valve seat.
Background technique
Valve be in fluid-duct-system, for control the direction of fluid, pressure, flow control device, be to make to match
Medium (liquid, gas, powder) in pipe and equipment opens or closes and can control the device of its flow.Valve is pipeline fluid
Control unit in transportation system has water conservancy diversion, cut-off, throttling, non-return, divides for changing access section and flow direction of medium
The functions such as stream or overflow release.For the valve of fluid control, from simplest shut-off valve into extremely complex robot control system(RCS)
Various valves used, kind and specification are various, and the inside nominal diameter of valve is from atomic small gauge valve greatly to latus rectum up to 60 English
Very little industrial pipeline valve.It can be used for controlling water, steam, oil product, gas, mud, various corrosive medias, liquid metal and put
The various types such as penetrating property fluid fluidly flow, and the operating pressure of valve can super-pressure from 150 pounds to 4500 pound.Work temperature
Degree can be from -270 DEG C of ultralow temperature to 1430 DEG C of superhigh temperature.And valve seat is one of extremely important component of valve, and and lock
Analysis or flap constitute sealing pair.
Being applied to various hard sealing surface valve seats, the production technologies such as gate valve, check-valves, shut-off valve at present is in carbon steel, no
Become rusty steel, built-up welding different hardness or corrosion resistant alloy on cast steel metal, such as cobalt-based, iron-based, Ni-based, copper-based.As base material be A105,
The seat ring of built-up welding STL.6 hard alloy on the carbon steels such as F11, F22, F9, F91.Past valve seat opening one side U-typed slot, due to valve
U-type groove depth above seat is deeper, usually 3mm, when built-up welding in carbon steel the ingredient of iron it is more enter STL.6 hard alloy
In, so that the iron-content of valve seat increases, often reach 20-30%, and cobalt and carbide are diluted, and cause weld overlay alloy content
The requirement of ISO600 standard cannot be reached.The valve seat that this built-up welding comes out due to being influenced by dilution rate is big, cause lower hardness,
The disadvantages of HRC≤30, wear resistance and corrosion resistance is poor, and high temperature resistance is poor.
Summary of the invention
For above-mentioned deficiency present in the prior art, the present invention on the basis of original technology problem to welding groove into
It has gone Curve guide impeller, and has used plasma surfacing technique, reduced dilution rate.By repeatedly practicing, valve seat is efficiently solved
The technical problem that middle iron-content increases and the amount containing cobalt of valve seat is relatively low.To make the valve seat of built-up welding meet wanting for ISO600 standard
It asks, and Fe≤8%, HRC >=38, has the characteristics that hardness is high, wear resistance and corrosion resistance is good, anti-oxidant and red good in thermal property.
In order to solve the above-mentioned technical problem, the present invention adopts the following technical scheme:
A method of valve seat is processed using welding procedure, comprising the following steps:
1, blank is forged into according to the art work sheet of valve seat；
2, blank is carried out on lathe rough turn, in the position turning V-groove of welding groove, recessing depth is 0.5mm；
3, the semi-finished product after will be rough turn weld, and carry out built-up welding in the V-groove position of semi-finished product, built-up welding uses plasma surfacing
Technique, it is ensured that STL.6 carbide reactor postwelding reaches ISO600 technical requirements；
4, destressing processing is carried out to the valve seat being welded, eliminates residual stress；
5, valve seat is carried out to smart car on lathe, the outer circle and V-groove end face to valve seat carry out smart car, reach the artwork of valve seat
Paper requirement；
6, PT inspection, chemical component and hardness determination are carried out to finished product sealing surface of seat, guarantees the hardness and wearability of valve seat.
The beneficial effects of the present invention are: present invention process step is simple, implement convenient for operation, make the hard alloy of valve seat at
Divide and meets professional standard, it is with good economic efficiency.
Detailed description of the invention
Fig. 1 is process flow chart of the invention.
Fig. 2 is valve seat machining sketch chart of the invention.
In figure: the STL.6 hard alloy of A. built-up welding.
Specific embodiment
Particular content of the invention is described in detail in the following with reference to the drawings and specific embodiments.
As depicted in figs. 1 and 2, a method of valve seat is processed using welding procedure, comprising the following steps:
1, blank is forged into according to the art work sheet of valve seat；
2, blank is carried out on lathe rough turn, according to the position turning V-groove shown in Fig. 2 in welding groove, recessing depth h is
0.5mm；
3, the semi-finished product after will be rough turn weld, and carry out built-up welding in the V-groove position of semi-finished product, built-up welding uses plasma surfacing
Technique, it is ensured that STL.6 carbide reactor postwelding reaches ISO600 technical requirements；
4, destressing processing is carried out to the valve seat being welded, eliminates residual stress；
5, valve seat is carried out to smart car on lathe, the outer circle and V-groove end face to valve seat carry out smart car, reach the artwork of valve seat
Paper requirement；
6, PT inspection, chemical component and hardness determination are carried out to finished product sealing surface of seat, guarantees the hardness and wearability of valve seat.
The hard alloy chemical component table of the existing detection of table 1
The hard alloy chemical component table that 2 present invention of table detects
In conclusion referring to Tables 1 and 2, a kind of side that valve seat is processed using welding procedure disclosed by the invention
Method, since the V-groove depth above valve seat is shallower, ferrous components a small amount of in carbon steel are entered in STL.6 hard alloy when built-up welding,
The problem relatively low with the amount containing cobalt of valve seat is increased this addresses the problem iron-content in valve seat, so that Fe≤8% in valve seat, hardness
It increases, HRC >=38, has the characteristics that wear resistance and corrosion resistance is good, anti-oxidant and red good in thermal property, and process costs are low, operation is simple
Folk prescription just, improves production efficiency.
Basic principles and main features and advantage of the invention have been shown and described above.The technical staff of the industry should
Understand, above embodiment only technical concepts and features to illustrate the invention, its object is to allow person skilled in the art
Scholar can understand the contents of the present invention and be implemented, and it is not intended to limit the scope of the present invention, it is all according to the present invention
Equivalent change or modification made by Spirit Essence, should be covered by the scope of protection of the present invention.
Claims (1)
1. a kind of method processed using welding procedure to valve seat, which is characterized in that the method for the processing includes following
Step:
1) blank is forged into according to the art work sheet of valve seat；
2) blank is carried out on lathe rough turn, in the position turning V-groove of welding groove, recessing depth is 0.5mm；
3) semi-finished product after will be rough turn weld, and carry out built-up welding in the V-groove position of semi-finished product, built-up welding uses plasma surfacing
Technique, it is ensured that STL.6 carbide reactor postwelding reaches 600 technical requirements of ISO；
4) destressing processing is carried out to the valve seat being welded, eliminates residual stress；
5) valve seat is carried out to smart car on lathe, the outer circle and V-groove end face to valve seat carry out smart car, reach the artwork of valve seat
Paper requirement；
6) PT inspection, chemical component and hardness determination are carried out to finished product sealing surface of seat, guarantees the hardness and wearability of valve seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710844520.4A CN109514185A (en) | 2017-09-19 | 2017-09-19 | A method of valve seat is processed using welding procedure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710844520.4A CN109514185A (en) | 2017-09-19 | 2017-09-19 | A method of valve seat is processed using welding procedure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109514185A true CN109514185A (en) | 2019-03-26 |
Family
ID=65767685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710844520.4A Pending CN109514185A (en) | 2017-09-19 | 2017-09-19 | A method of valve seat is processed using welding procedure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109514185A (en) |
-
2017
- 2017-09-19 CN CN201710844520.4A patent/CN109514185A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190326 |
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| WD01 | Invention patent application deemed withdrawn after publication |