CN1191439C - Valve plate surface treating process - Google Patents
Valve plate surface treating process Download PDFInfo
- Publication number
- CN1191439C CN1191439C CN 02113909 CN02113909A CN1191439C CN 1191439 C CN1191439 C CN 1191439C CN 02113909 CN02113909 CN 02113909 CN 02113909 A CN02113909 A CN 02113909A CN 1191439 C CN1191439 C CN 1191439C
- Authority
- CN
- China
- Prior art keywords
- valve plate
- base material
- sandblast
- planes
- circular arcs
- 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.)
- Expired - Fee Related
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- Coating By Spraying Or Casting (AREA)
Abstract
The present invention discloses a valve plate surface treating technology which comprises the preparation of base material, the spraying treatment for two circular arcs of a valve plate, and the spraying treatment for two planes of a valve plate. In the preparation of the base material, the base material is processed according to the requirements of a drawing, and is modified by 42CrMo. In the treatment for two circular arcs of a valve plate, sand spraying and a one-step spray welding are adopted to treat two circular arcs of a valve plate so as to solve the problems of impact and abrasion of the two circular arcs. In the spraying treatment for two planes of a valve plate, sand spraying and high-speed flame spraying are adopted to treat two planes of a valve plate so as to solve the problem of abrasion of two planes. Valve plates which are produced with the method of the present invention ensure that workpieces are resistant to abrasion and impact. The technology has the advantages of simple operation and low cost.
Description
Technical field:
The present invention relates to a kind of process of surface treatment, particularly relate to a kind of valve plate surface treating process.
Background technique:
In the concrete pump Scotch yoke of engineering machinery valve plate is housed, valve plate moves up and down in Scotch yoke, and frequency is about 30 times/minute, drives valve and promptly opens the transmission and concrete transmission passage, and closing valve is that closing passage stops delivering concrete.The bigger stone of particle is usually arranged between valve plate and valve seat, when driving valve, stone or by being squeezed away, or squeezed brokenly, so the suffered impact force of valve plate is very big.The valve plate that conventional production methods is produced is to carry out Quenching Treatment after adopting 42CrMo modified.The workpiece of producing with this production method is hard and crisp, and the main damage type of valve plate is fracture, requires high-quality, construction industry efficiently in today, and these parts have a strong impact on production, are badly in need of solving.
Summary of the invention:
The valve plate that technical problem to be solved by this invention provides a kind of production has valve plate surface treating process wear-resisting, impact resistance.
The valve plate surface treating process that the present invention adopts is:
At first, carry out the preparation of base material: process the valve plate base material by the requirement of valve plate drawing, the valve plate base material is carried out quenching with Subsequent tempering with 42CrMo;
Then, the valve plate blank surface is handled, is comprised and handle two sections circular arcs of valve plate base material and handle valve plate two planes that its processing sequence does not have requirement successively:
(1), handle two sections circular arcs of valve plate base material:
The first step, sandblast
Material and process parameter:
Material: corundum sand, granularity: about 14 orders,
Air pressure: 0.5～0.8Mpa, sandblast distance: 150～200mm,
The sandblast angle: 60～75 degree, spray time: less than 30min,
Second step, one-process surfacing
1. equipment: spray welding gun,
2. material: spray welding powder,
3. process parameter: oxygen: 7 kg/cm
21.0m
3/ h,
Acetylene: 1.2kg/cm
21.0m
3/ h,
4. coating thickness: 0.8～1.2mm;
(2), handle valve plate two planes:
The first step, sandblast
Material and process parameter:
Material: corundum sand, granularity: about 14 orders,
Air pressure: 0.5～0.8Mpa, sandblast distance: 150～200mm,
The sandblast angle: 60～75 degree, spray time: less than 30min,
Second step, high speed flange spraying
1. equipment: paint finishing,
2. material: the high-speed flame tailored flour,
3. process parameter:
Oxygen: 100M
2/ min, third is rare: 74%,
Nitrogen: 2M
2/ min, powder feeding motor: 2.0rpm,
Spray distance: 200mm,
4. coating thickness: 0.1～0.2mm.
Because the present invention has adopted above-mentioned technique processing method, two sections circular arcs of valve plate and panel are carried out the processing of sandblast coating, cover coat hardness can reach HRC55～65, matrix is the 42CrMo quality adjustment condition, the combination of surfacing coating is a metallurgy combination, and the adhesive strength of high speed flange spraying layer can reach 7～10kg/mm
2So the valve plate that adopts the inventive method to produce guaranteed wear-resisting, the impact resistance of workpiece, and this technological operation is simple, and is with low cost.
Embodiment:
At first, carry out the preparation of base material: process the valve plate base material by the requirement of valve plate drawing, the valve plate base material is carried out quenching with Subsequent tempering with 42CrMo;
Then, the valve plate blank surface is handled, is comprised and handle two sections circular arcs of valve plate base material and handle valve plate two planes that its processing sequence does not have requirement successively:
(1), handle two sections circular arcs of valve plate, solves that two sections circular arcs are hit and the wear-resisting problem first step, sandblast
Material and process parameter:
Material: corundum sand, granularity: about 14 orders,
Air pressure: 0.5～0.8Mpa, sandblast distance: 150～200mm,
The sandblast angle: 60～75 degree, spray time: less than 30min,
Second step, one-process surfacing
1. equipment: the h/4 spray welding gun that Shanghai Welding and Cutting Tool Factory produces,
2. material: the Ni60 spray welding powder that Shanghai Si Taili produces,
3. process parameter: oxygen: 7kg/cm
21.0m
3/ h,
Acetylene: 1.2kg/cm
21.0m
3/ h,
4. coating thickness: 0.8～1.2mm,
(2), handle valve plate two planes, solve the wear-resisting problem on two planes
The first step, sandblast
Material and process parameter:
Material: corundum sand, granularity: about 14 orders,
Air pressure: 0.5～0.8Mpa, sandblast distance: 150～200mm,
The sandblast angle: 60～75 degree, spray time: less than 30min,
Second step, high speed flange spraying
1. equipment: U.S. import JETKOTE paint finishing,
2. material: WC-Co12% high-speed flame tailored flour,
3. process parameter:
Oxygen: 100M
2/ min, third is rare: 74%,
Nitrogen: 2M
2/ min, powder feeding motor: 2.0rpm,
Spray distance: 200mm,
4. coating thickness: 0.1～0.2mm.
Surface treated valve plate cover coat hardness can reach HRC55～65, and matrix is the 42CrMo quality adjustment condition, and the combination of surfacing coating is a metallurgy combination, and the adhesive strength of high speed flange spraying layer can reach 7～10kg/mm
2, the valve plate that adopts the inventive method to produce guaranteed wear-resisting, the impact resistance of workpiece, and this technological operation is simple, and is with low cost.
Claims (1)
- A kind of valve plate surface treating process comprises the preparation of base material and to the spraying treatmen on two sections circular arcs of valve plate, valve plate two planes, it is characterized in that:At first, carry out the preparation of base material: process the valve plate base material by the requirement of valve plate drawing, the valve plate base material is carried out quenching with Subsequent tempering with 42CrMo;Then, the valve plate blank surface is handled, is comprised and handle two sections circular arcs of valve plate base material and handle valve plate two planes that its processing sequence does not have requirement successively:(1), handle two sections circular arcs of valve plate base material:The first step, sandblastMaterial and process parameter;Material: corundum sand, granularity: about 14 orders,Air pressure: 0.5～0.8Mpa, sandblast distance: 150～200mm,The sandblast angle: 60～75 degree, spray time: less than 30min,Second step, one-process surfacing1. equipment: spray welding gun,2. material: spray welding powder,3. process parameter: oxygen: 7kg/cm 21.0m 3/ h,Acetylene: 1.2 kg/cm 21.0m 3/ h,4. coating thickness: 0.8～1.2mm;(2), handle valve plate two planes:The first step, sandblastMaterial and process parameter:Material: corundum sand, granularity: about 14 orders,Air pressure: 0.5～0.8Mpa, sandblast distance: 150～200mm,The sandblast angle: 60～75 degree, spray time: less than 30min,Second step, high speed flange spraying3. equipment: paint finishing,4. material: the high-speed flame tailored flour,3. process parameter:Oxygen: 100M 2/ min, third is rare: 74%,Nitrogen: 2M 2/ min, powder feeding motor: 2.0rpm,Spray distance: 200mm,4. coating thickness: 0.1～0.2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02113909 CN1191439C (en) | 2002-01-11 | 2002-01-11 | Valve plate surface treating process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02113909 CN1191439C (en) | 2002-01-11 | 2002-01-11 | Valve plate surface treating process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1432749A CN1432749A (en) | 2003-07-30 |
| CN1191439C true CN1191439C (en) | 2005-03-02 |
Family
ID=27628436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02113909 Expired - Fee Related CN1191439C (en) | 2002-01-11 | 2002-01-11 | Valve plate surface treating process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1191439C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101786193B (en) * | 2010-03-22 | 2011-11-16 | 天津市富赛克阀门有限公司 | Method for spray-welding anisotropic material on sealing surface of cast iron valve plate |
| CN108312070A (en) * | 2018-02-06 | 2018-07-24 | 郑州三超除锈技术有限公司 | The rust-proofing method of derusting by sandblasting |
| CN111230748B (en) * | 2019-12-30 | 2023-08-08 | 浙江浙能中煤舟山煤电有限责任公司 | Method for solving problem of jamming of high-medium pressure regulating air valve of steam turbine |
-
2002
- 2002-01-11 CN CN 02113909 patent/CN1191439C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1432749A (en) | 2003-07-30 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050302 Termination date: 20140111 |