CN110270748A - The technique of mechanization plasma spray hard alloy valve sealing face - Google Patents
The technique of mechanization plasma spray hard alloy valve sealing face Download PDFInfo
- Publication number
- CN110270748A CN110270748A CN201810202605.7A CN201810202605A CN110270748A CN 110270748 A CN110270748 A CN 110270748A CN 201810202605 A CN201810202605 A CN 201810202605A CN 110270748 A CN110270748 A CN 110270748A
- Authority
- CN
- China
- Prior art keywords
- welding
- valve body
- surfacing
- guiding rib
- mechanization
- Prior art date
- 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.)
- Pending
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000007921 spray Substances 0.000 title claims abstract description 23
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 12
- 239000000956 alloy Substances 0.000 title claims abstract description 12
- 238000003466 welding Methods 0.000 claims abstract description 49
- 239000000843 powder Substances 0.000 claims abstract description 12
- WAIPAZQMEIHHTJ-UHFFFAOYSA-N [Cr].[Co] Chemical compound [Cr].[Co] WAIPAZQMEIHHTJ-UHFFFAOYSA-N 0.000 claims abstract description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 14
- 239000007789 gas Substances 0.000 claims description 14
- 229910052786 argon Inorganic materials 0.000 claims description 7
- 238000005266 casting Methods 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 4
- 239000010410 layer Substances 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000011229 interlayer Substances 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 239000007858 starting material Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 239000010941 cobalt Substances 0.000 abstract description 3
- 229910017052 cobalt Inorganic materials 0.000 abstract description 3
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 abstract description 3
- 238000011112 process operation Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- 229910000531 Co alloy Inorganic materials 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 239000003818 cinder Substances 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000010415 tidying Methods 0.000 description 1
Classifications
-
- 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
- B23K10/00—Welding or cutting by means of a plasma
- B23K10/02—Plasma welding
- B23K10/027—Welding for purposes other than joining, e.g. build-up welding
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
Abstract
The present invention relates to valve manufacture industries, about the technique of mechanization plasma spray hard alloy valve sealing face, mainly for Y-shaped cut-off valve, solve due to narrow space in valve body, limit other welding method built-up welding sealing surfaces, guiding rib.Using the technique, using dedicated unit, with powdery (Stellite 21) cobalt-based material, rationally determine welding condition, establishment control program, input unit system touch screen, mechanization operates spray welding apparatus, using plasma spray, by the uniform surfacing of cemented carbide powder on valve body sealing surface, guiding rib position, wlding utilization rate is up to 95%.The appearance of surfacing forms smooth even, high production efficiency, and realization automatically completes critical process operation.
Description
Technical field
The present invention relates to valve manufacture industry, about the technique of mechanization plasma spray hard alloy valve sealing face,
It using the technique mainly for Y-shaped cut-off valve, solves Y-shaped cut-off valve, due to narrow space in valve body, limits other welding
Method built-up welding sealing surface, guiding rib.Welding is rationally determined with powdery (Stellite 21) cobalt-based material using dedicated unit
Technological parameter, establishment control program, input unit system touch screen, mechanization running equipment are closed hard with plasma spray
For the uniform surfacing in bronze end on valve body sealing surface, guiding rib position, wlding utilization rate is up to 95%.The appearance of surfacing forms light
Sliding uniform, high production efficiency realizes intelligent completion critical process operation.Greatly improve working efficiency, overlaying surface quality.
Background technique
Valve manufacture industry commonly uses stick electrode arc welding and carries out built-up welding, select cobalt-based to valve body inner sealing surface, guiding rib
Alloy electrode, format diameter are Φ 2.5- Φ 5mm, to be baked to defined temperature, heat preservation one using the preceding explanation according to welding rod
The section time could carry out built-up welding to valve body inner sealing surface, guiding rib position, due to narrow space in Y-shaped cut-off valve valve body, depth
Long, stick electrode arc welding is not easy built-up welding, and low efficiency, and connector is more, is not easy intuitively to weld shape, and scarfing cinder is difficult, at high cost, labor intensity
Greatly, easily there is the defects of micro-crack, stomata, slag inclusion in heap welding zone, and difficulty improves sealing surface in high, precision and frontier end valve gate valve body, guiding
Muscle surfacing quality.
Summary of the invention
The object of the present invention is to provide the techniques of-kind of mechanization plasma spray hard alloy valve sealing face, using this
Technique surfacing valve body inner sealing surface, guiding rib, solve Y-shaped cut-off valve, due to narrow space in valve body, other welding methods
It can not the inclined sealing surface of built-up welding, guiding rib.Realize do mechanization operation, hard alloy wlding utilization rate is up to 95%.Work can be improved
Make 5 times of efficiency or more, reduces by 50% or more production cost, improve sealing surface, guiding rib built-up welding in high, precision and frontier end valve gate valve body
Quality.
Technical solution of the present invention are as follows: the technique of mechanization plasma spray hard alloy valve sealing face, process are as follows: weldering
Clamping valve body-casting preheats (in need)-welding condition-input control on preceding preparation-welding machine electrical characteristics-turntable
Processing procedure sequence-starter-striking surfacing-post weld heat treatment (in need)；
The content of critical process is:
Welding preparation: prepare to require the valve body of built-up welding sealing surface, guiding rib, with powdery AWS ECoCr-E (Stellite 21)
Cobalt-base alloys, 99.99% argon gas；
Welding machine electrical characteristics: downhand position, electric current type are DC (direct current), and polarity EN (just connects)；
Clamping valve body on turntable: the clamping valve body on the turntable of horizontal special welding machine, precisely adjusting valve body needs in surfacing sealing surface
Heart line, guiding rib horizontal direction are vertical with spray gun running track；
Casting preheats (in need): 210 DEG C of minimum temperature of preheating, 260 DEG C of interlayer minimax temperature；
Welding condition: welding current 120-150A, weldingvoltage 23-31V, powder feed rate 11-20g/min, weldering speed 12-
19mm/min, is 99.99% argon gas with gas, and protection air-flow amount is 15-25L/min, powder feeding throughput 1.9-2.1L/min, ion
Gas flow 1.7-1.9L/min；
Input control program: according to valve body inner sealing surface, the geometric dimension of guiding rib and direction, the control of spray welding unit system is inputted
Processing procedure sequence；
Starter: motor driven disk rotational, spray gun straight line enter body cavity, arrive at surfacing area；
Striking surfacing: spray gun straight line is sent into, and surfacing is swung, swing speed 40-80cm/min, swing width 100mm, transfer electricity
Arc, compresses bore dia 3mm, nozzle diameter 25mm, and powder feeding multilayer welding in spray gun periphery uses brush cleaning layer surface after being soldered.It is right
The valve body of post weld heat treatment is needed to be heat-treated in welding procedure sheet (WPS).
The positive effect of the present invention is:
Without human weld, do mechanization operation is realized, hard alloy wlding utilization rate is up to 95%.Working efficiency 5 can be improved again with
On, 50% or more production cost is reduced, sealing surface, guiding rib surfacing quality in high, precision and frontier end valve gate valve body are improved.Wlding benefit
95% is up to rate.The appearance of surfacing forms smooth even, and high production efficiency realizes intelligent completion critical process operation.Significantly
Improve working efficiency, overlaying surface quality.
Specific embodiment
The valve body of built-up welding sealing surface, guiding rib, cleaning and tidying bore seal face, guiding rib position are required in spray welding preparation
, welding machine electrical characteristics downhand position is selected with 99.99% argon gas with AWS ECoCr-E (Stellite 21) cobalt-based alloy powder,
Electric current type is DC (direct current), and polarity EN (just connects), the clamping valve body on the turntable of horizontal special welding machine, and precisely adjustment needs to weld
It is horizontal positioned to connect sealing surface center line, guiding rib, it is straight with spray gun center weight, for the casting that needs preheat, preheat minimum temperature
210 DEG C, 260 DEG C of interlayer minimax temperature chooses welding condition: welding current 120-150A, weldingvoltage 23-
31V, powder feed rate 11-20g/min, weldering speed 12-19mm/min is 99.99% argon gas with gas, and protection air-flow amount is 15-25L/
Min, powder feeding throughput 1.9-2.1L/min, ionized gas flow 1.7-1.9L/min, according to valve body inner sealing surface, guiding rib
Geometric dimension, track, direction, the input operation program on spray welding unit control flow, the work of starter system, motor driven circle
Disk rotation, welding gun straight line enter body cavity, arrive at surfacing area；Plasma striking, surfacing are swung, swing speed 40-80cm/
Min, swing width 100mm, transferred arc compress bore dia 3mm, nozzle diameter 25mm, adjustment argon gas amount supply, protection air-flow
Amount is 15-25L/min, powder feeding throughput 1.9-2.1L/min, ionized gas flow 1.7-1.9L/min, and the powder feeding of welding gun periphery is more
Layer weldering, uses brush cleaning layer surface after being soldered, examine surfacing quality.For being required at postwelding heat on welding procedure sheet (WPS)
The valve body of reason is heat-treated.
Claims (1)
1. the technique of mechanization plasma spray hard alloy valve sealing face, process are as follows: welding preparation-welding machine electricity is special
Property-turntable on clamping valve body-casting preheating (in need)-welding condition-input control program-starting dress
Set-striking surfacing-post weld heat treatment (in need)；
The content of critical process is:
Welding preparation: prepare to require the valve body of built-up welding sealing surface, guiding rib, with powdery AWS ECoCr-E (Stellite 21)
Cobalt-base alloys, 99.99% argon gas；
Welding machine electrical characteristics: downhand position, electric current type are DC (direct current), and polarity EN (just connects)；
Clamping valve body on turntable: the clamping valve body on the turntable of horizontal special welding machine, precisely adjusting valve body needs in surfacing sealing surface
Heart line, guiding rib horizontal direction are vertical with spray gun running track；
Casting preheats (in need): 210 DEG C of minimum temperature of preheating, 260 DEG C of interlayer minimax temperature；
Welding condition: welding current 120-150A, weldingvoltage 23-31V, powder feed rate 11-20g/min, weldering speed 12-
19mm/min, is 99.99% argon gas with gas, and protection air-flow amount is 15-25L/min, powder feeding throughput 1.9-2.1L/min, ion
Gas flow 1.7-1.9L/min；
Input control program: according to valve body inner sealing surface, the geometric dimension of guiding rib and direction, the control of spray welding unit system is inputted
Processing procedure sequence；
Starter: motor driven disk rotational, spray gun straight line enter body cavity, arrive at surfacing area；
Striking surfacing: spray gun straight line is sent into, and surfacing is swung, swing speed 40-80cm/min, swing width 100mm, transfer electricity
Arc, compresses bore dia 3mm, nozzle diameter 25mm, and powder feeding multilayer welding in spray gun periphery uses brush cleaning layer surface after being soldered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810202605.7A CN110270748A (en) | 2018-03-13 | 2018-03-13 | The technique of mechanization plasma spray hard alloy valve sealing face |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810202605.7A CN110270748A (en) | 2018-03-13 | 2018-03-13 | The technique of mechanization plasma spray hard alloy valve sealing face |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110270748A true CN110270748A (en) | 2019-09-24 |
Family
ID=67957484
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810202605.7A Pending CN110270748A (en) | 2018-03-13 | 2018-03-13 | The technique of mechanization plasma spray hard alloy valve sealing face |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110270748A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111112812A (en) * | 2019-12-30 | 2020-05-08 | 南通市电站阀门有限公司 | Rapid welding method for sealing surface of plasma spray welding valve |
| CN112975084A (en) * | 2021-03-26 | 2021-06-18 | 苏州热工研究院有限公司 | Welding method for cobalt-free nickel-based alloy plasma surfacing for strengthening sealing surface of nuclear power valve |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1804127A (en) * | 2005-12-14 | 2006-07-19 | 东方汽轮机厂 | Steam turbine valve manifold stellite alloy plasma spray welding method and equipment |
| CN104534165A (en) * | 2014-11-25 | 2015-04-22 | 南通龙源电站阀门有限公司 | Valve seat face surfacing technology |
| WO2015101699A1 (en) * | 2014-01-03 | 2015-07-09 | Wärtsilä Finland Oy | Plasma-transfer-arc-welding (pta) coating for use on valve seats, method for manufacturing, pta coating, and use of the pta coating on valve seat surfaces |
| CN204848998U (en) * | 2015-08-10 | 2015-12-09 | 沈阳海纳自动化设备有限公司 | Valve build -up welding robot |
| CN106975830A (en) * | 2017-05-23 | 2017-07-25 | 东方电气集团东方汽轮机有限公司 | A kind of valve disc multiple location plasma spray stellite process |
| CN107598351A (en) * | 2017-09-13 | 2018-01-19 | 浙江富春江水电设备有限公司 | The cylindrical large area plasma overlaying method of Stellite cobalt-base alloys |
-
2018
- 2018-03-13 CN CN201810202605.7A patent/CN110270748A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1804127A (en) * | 2005-12-14 | 2006-07-19 | 东方汽轮机厂 | Steam turbine valve manifold stellite alloy plasma spray welding method and equipment |
| WO2015101699A1 (en) * | 2014-01-03 | 2015-07-09 | Wärtsilä Finland Oy | Plasma-transfer-arc-welding (pta) coating for use on valve seats, method for manufacturing, pta coating, and use of the pta coating on valve seat surfaces |
| CN104534165A (en) * | 2014-11-25 | 2015-04-22 | 南通龙源电站阀门有限公司 | Valve seat face surfacing technology |
| CN204848998U (en) * | 2015-08-10 | 2015-12-09 | 沈阳海纳自动化设备有限公司 | Valve build -up welding robot |
| CN106975830A (en) * | 2017-05-23 | 2017-07-25 | 东方电气集团东方汽轮机有限公司 | A kind of valve disc multiple location plasma spray stellite process |
| CN107598351A (en) * | 2017-09-13 | 2018-01-19 | 浙江富春江水电设备有限公司 | The cylindrical large area plasma overlaying method of Stellite cobalt-base alloys |
Non-Patent Citations (1)
| Title |
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| 高荣发 马小雄: "《等离子弧喷焊》", 30 September 1979, 机械工业出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111112812A (en) * | 2019-12-30 | 2020-05-08 | 南通市电站阀门有限公司 | Rapid welding method for sealing surface of plasma spray welding valve |
| CN112975084A (en) * | 2021-03-26 | 2021-06-18 | 苏州热工研究院有限公司 | Welding method for cobalt-free nickel-based alloy plasma surfacing for strengthening sealing surface of nuclear power valve |
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Application publication date: 20190924 |