CN102212776A - Method for spraying wolfram carbide alloy on seal surface of valve plate (seat) at supersonic speed - Google Patents
Method for spraying wolfram carbide alloy on seal surface of valve plate (seat) at supersonic speed Download PDFInfo
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- CN102212776A CN102212776A CN2011101353191A CN201110135319A CN102212776A CN 102212776 A CN102212776 A CN 102212776A CN 2011101353191 A CN2011101353191 A CN 2011101353191A CN 201110135319 A CN201110135319 A CN 201110135319A CN 102212776 A CN102212776 A CN 102212776A
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Abstract
The invention discloses a method for spraying a wolfram carbide alloy on a seal surface of a valve plate (seat) at a supersonic speed. The method is characterized in that supersonic spraying equipment is adopted to spray the wolfram carbide alloy on the seal surface of the valve plate (seat); the sprayed wolfram carbide alloy coating is dense and meets the airtightness requirement; the coating hardness HV (Vickers hardness) is not less than 1100; the coating void ratio is not more than 1%; the coating bonding strength is not less than 10000PSi; and the coating thickness is more than 0.15mm. The method has the following advantages: through supersonic spraying, the coating and a matrix structure are not subjected to high temperature and deformation; preheating and postweld heat treatment are not needed; lathing is not needed after welding; the method is suitable for batch (non-singleton) production; and the production efficiency is high.
Description
Technical field
The present invention relates to high pressure valve, be specifically related to the method for valve plate (seat) trim supersonic spray coating carbon tungsten alloy.
Background technology
In the production of domestic high pressure valve, for improving the work-ing life of valve products, particularly anti scuffing, the erosion resistance ability of valve plate (seat) trim generally all are spraying nickel-base alloy or built-up welding cobalt base alloys on valve plate (seat) body, though equipment and technology is updated, but because the temperature of built-up welding or surfacing is higher, change the hardness of matrix, destroyed matrix, needed preheating before the general weldering, postwelding need be done corresponding thermal treatment, and production efficiency is low.
Summary of the invention
The objective of the invention is to: the method that a kind of valve plate (seat) trim supersonic spray coating carbon tungsten alloy is provided, at valve plate (seat) trim supersonic spray coating Wimet, valve plate (seat) anti scuffing, erosion resistance ability had both been satisfied, do not change matrix again, and do not need preheating or special postweld heat treatment, be convenient to size of the organization production, raise the efficiency.
Technical solution of the present invention is: adopt supersonic spray coating equipment, at valve plate (seat) trim sprayed wc alloy, the carbon tungsten alloy coating densification after the spraying reaches the hermetic seal requirement, coating hardness: HV 〉=1100; Coating voidage :≤1%; Anchoring strength of coating 〉=10000PSi; Coat-thickness＞0.15mm.
Wherein, the method of supersonic spray coating carbon tungsten alloy may further comprise the steps: workpiece cleaning, surface sand-blasting, spraying, corase grind, visual inspection, correct grinding, polishing, check warehouse-in, it is characterized in that: wherein, need to carry out sandblasting before the Workpiece painting, the workpiece after the sandblast should be avoided touching; Use frock clamp to clamp before the Workpiece painting, need not sprayed surface and use high temperature protection or antifreezing protection, select the carbon tungsten alloy powder for use, powder fully toasts at 85 ℃ before using, the control oxygen flow is at 2000～2200SCFH during spraying, kerosene oil flow is 5.5～6.5, and the powder feeding gas flow is at 20～30 SCFH, and the interval of each spraying was controlled at 20 minutes.
The present invention has the following advantages:
1) workpiece heats up for a short time when spraying, does not influence matrix, does not change matrix strength.
2) do not need preheating or carry out special postweld heat treatment before and after the spraying, enhance productivity.
3) can directly grind, polish after the spraying, need not Vehicle Processing, raise the efficiency.
4) belong to (non-single-piece) processing in batches, be convenient to size of the organization production.
5) adopt supersonic spray coating equipment, by various parameters being adjusted, controlled, coating and substrate combinating strength jail, coating surface strength height, low coating voidage reaches API hermetic seal requirement, and frictional resistance is low, and wear resistance is good, resistance to wear, erosion resistance has reduced valve switch moment.
Embodiment
Further specify technical solution of the present invention below in conjunction with specific embodiment, these embodiment can not be interpreted as it is restriction to technical solution.
Embodiment 1:
At valve plate (seat) trim according to following steps supersonic spray coating carbon tungsten alloy coating: workpiece cleaning, surface sand-blasting, spraying, corase grind, visual inspection, correct grinding, polishing, check warehouse-in, it is characterized in that: wherein, need to carry out sandblasting before the Workpiece painting, the workpiece after the sandblast should be avoided touching; Use frock clamp to clamp before the Workpiece painting, need not sprayed surface and use high temperature protection or antifreezing protection, select the carbon tungsten alloy powder for use, powder fully toasts at 85 ℃ before using, the control oxygen flow is at 2200SCFH during spraying, kerosene oil flow is 6.5, and the powder feeding gas flow is at 30 SCFH, and the interval of each spraying was controlled at 20 minutes.
Embodiment 2:
At valve plate (seat) trim according to following steps supersonic spray coating carbon tungsten alloy coating: workpiece cleaning, surface sand-blasting, spraying, corase grind, visual inspection, correct grinding, polishing, check warehouse-in, it is characterized in that: wherein, need to carry out sandblasting before the Workpiece painting, the workpiece after the sandblast should be avoided touching; Use frock clamp to clamp before the Workpiece painting, need not sprayed surface and use high temperature protection or antifreezing protection, select the carbon tungsten alloy powder for use, powder fully toasts at 85 ℃ before using, the control oxygen flow is at 2000SCFH during spraying, kerosene oil flow is 5.5, and the powder feeding gas flow is at 20SCFH, and the interval of each spraying was controlled at 20 minutes.
Embodiment 3:
At valve plate (seat) trim according to following steps supersonic spray coating carbon tungsten alloy coating: workpiece cleaning, surface sand-blasting, spraying, corase grind, visual inspection, correct grinding, polishing, check warehouse-in, it is characterized in that: wherein, need to carry out sandblasting before the Workpiece painting, the workpiece after the sandblast should be avoided touching; Use frock clamp to clamp before the Workpiece painting, need not sprayed surface and use high temperature protection or antifreezing protection, select the carbon tungsten alloy powder for use, powder fully toasts at 85 ℃ before using, the control oxygen flow is at 2100SCFH during spraying, kerosene oil flow is 6.0, and the powder feeding gas flow is at 25SCFH, and the interval of each spraying was controlled at 20 minutes.
The coating hardness of the carbon tungsten alloy coating of embodiment 1-3: HV 〉=1100; Coating voidage :≤1%; Anchoring strength of coating 〉=10000PSi; Coat-thickness＞0.15mm.
Claims (2)
1. the method for valve plate (seat) trim supersonic spray coating carbon tungsten alloy, it is characterized in that: this spraying method adopts supersonic spray coating equipment, at valve plate (seat) trim sprayed wc alloy, the carbon tungsten alloy coating densification after the spraying reaches the hermetic seal requirement, coating hardness: HV 〉=1100; Coating voidage :≤1%; Anchoring strength of coating 〉=10000PSi; Coat-thickness＞0.15mm.
2. the method for valve plate (seat) trim supersonic spray coating carbon tungsten alloy, this spraying method may further comprise the steps: workpiece cleaning, surface sand-blasting, spraying, corase grind, visual inspection, correct grinding, polishing, check warehouse-in, it is characterized in that: wherein, need to carry out sandblasting before the Workpiece painting, the workpiece after the sandblast should be avoided touching; Use frock clamp to clamp before the Workpiece painting, need not sprayed surface and use high temperature protection or antifreezing protection, select the carbon tungsten alloy powder for use, powder fully toasts at 85 ℃ before using, the control oxygen flow is at 2000～2200SCFH during spraying, kerosene oil flow is 5.5～6.5, and the powder feeding gas flow is at 20～30 SCFH, and the interval of each spraying was controlled at 20 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101353191A CN102212776A (en) | 2011-05-24 | 2011-05-24 | Method for spraying wolfram carbide alloy on seal surface of valve plate (seat) at supersonic speed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101353191A CN102212776A (en) | 2011-05-24 | 2011-05-24 | Method for spraying wolfram carbide alloy on seal surface of valve plate (seat) at supersonic speed |
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| Publication Number | Publication Date |
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| CN102212776A true CN102212776A (en) | 2011-10-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011101353191A Pending CN102212776A (en) | 2011-05-24 | 2011-05-24 | Method for spraying wolfram carbide alloy on seal surface of valve plate (seat) at supersonic speed |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102828141A (en) * | 2012-09-12 | 2012-12-19 | 金湖县赛欧电气有限公司 | Method for spraying tungsten carbide alloy on valve plate sealing surface at supersonic speed |
| CN103820748A (en) * | 2013-11-25 | 2014-05-28 | 成都发动机（集团）有限公司 | Technique for spraying cobalt-molybdenum-chrome-silicon coating on surface of thin-walled nickel-based alloy piece |
| CN104728511A (en) * | 2013-12-18 | 2015-06-24 | 上海宝钢工业技术服务有限公司 | Method for processing valve element surface of high-pressure corrosion-resistant abrasion-resistant valve |
| CN106917060A (en) * | 2017-03-21 | 2017-07-04 | 沃德传动（天津）股份有限公司 | A kind of reductor oil-sealing sleeve and its hardening process |
| CN109321864A (en) * | 2018-11-27 | 2019-02-12 | 广东省新材料研究所 | In the method for two sealing surface supersonic spray coating tungsten carbide-nickel chromium chromium carbide mixed coating of valve plate valve seat |
| CN112691874A (en) * | 2020-12-24 | 2021-04-23 | 常熟市万胜汽车配件有限公司 | Processing technology of durable automobile air conditioner valve plate |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1342525A (en) * | 2001-08-31 | 2002-04-03 | 中国人民解放军第二炮兵工程学院 | Multifunctional supersonic flame spraying method and its intelligent control system |
| CN201802904U (en) * | 2010-09-10 | 2011-04-20 | 上海高中压阀门股份有限公司 | Improved ball valve |
-
2011
- 2011-05-24 CN CN2011101353191A patent/CN102212776A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1342525A (en) * | 2001-08-31 | 2002-04-03 | 中国人民解放军第二炮兵工程学院 | Multifunctional supersonic flame spraying method and its intelligent control system |
| CN201802904U (en) * | 2010-09-10 | 2011-04-20 | 上海高中压阀门股份有限公司 | Improved ball valve |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102828141A (en) * | 2012-09-12 | 2012-12-19 | 金湖县赛欧电气有限公司 | Method for spraying tungsten carbide alloy on valve plate sealing surface at supersonic speed |
| CN103820748A (en) * | 2013-11-25 | 2014-05-28 | 成都发动机（集团）有限公司 | Technique for spraying cobalt-molybdenum-chrome-silicon coating on surface of thin-walled nickel-based alloy piece |
| CN104728511A (en) * | 2013-12-18 | 2015-06-24 | 上海宝钢工业技术服务有限公司 | Method for processing valve element surface of high-pressure corrosion-resistant abrasion-resistant valve |
| CN106917060A (en) * | 2017-03-21 | 2017-07-04 | 沃德传动（天津）股份有限公司 | A kind of reductor oil-sealing sleeve and its hardening process |
| CN109321864A (en) * | 2018-11-27 | 2019-02-12 | 广东省新材料研究所 | In the method for two sealing surface supersonic spray coating tungsten carbide-nickel chromium chromium carbide mixed coating of valve plate valve seat |
| CN112691874A (en) * | 2020-12-24 | 2021-04-23 | 常熟市万胜汽车配件有限公司 | Processing technology of durable automobile air conditioner valve plate |
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Application publication date: 20111012 |