CN105215570A - A kind of flat seal new method - Google Patents
A kind of flat seal new method Download PDFInfo
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- CN105215570A CN105215570A CN201410310582.3A CN201410310582A CN105215570A CN 105215570 A CN105215570 A CN 105215570A CN 201410310582 A CN201410310582 A CN 201410310582A CN 105215570 A CN105215570 A CN 105215570A
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- surfacing
- insulation
- flat seal
- new method
- product
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Abstract
A kind of flat seal new method, relates to a kind of plane hard seals technical field of valve.Implementation step of the present invention is simple, sealing surface adopts surfacing carbide alloy NI55, NI60, and the sealing surface processed through the method closes under the high temperature conditions repeatedly, and wear extent is minimum, sealing property, resistance to elevated temperatures, corrosion resistance and good, long product lifecycle.
Description
Technical field
The present invention relates to a kind of plane hard seals technical field of valve, particularly a kind of flat seal new method, be applicable to that below 20Mpa is closed frequent, bad environments plane sealing valve.
Background technology
In recent ten years, along with country policy and economic situation take a turn for the better, all kinds of business equipment such as domestic petrochemical industry faces the replacement cycle, newly constructed facility amount is large, for valve industry provides favourable development condition.Sealing surface is the working face of valve most critical, and the quality of sealing surface quality is related to the service life of valve.The hardness in domestic existing valve flat seal face is all at about HRC40-50.The hardness in part valve flat seal face reaches HRC50-60, but corrosion-resistant and resistance to elevated temperatures is not very desirable.Along with the develop rapidly of science and technology and improving constantly of industrial level, the sealing of valve and reliability requirement more and more higher.Seal failure not only can cause huge economic loss, and pollutes the environment, and even leads to great personnel casualty accidents.In order to address these problems, the technical staff of R&D institution and enterprise is constantly exploring, is studying, although make some progress, still there is the technical barrier not yet overcome in practice.
Summary of the invention
The object of the invention is to overcome above deficiency, a kind of flat seal new method is provided.Adopt surfacing nickel 55/60 alloy at the valve gap of valve and sealing ring contact surface, the sealing surface be made up of it can close under the high temperature conditions repeatedly, and wear extent is minimum, improves that product is high temperature resistant, decay resistance.
The technical solution adopted for the present invention to solve the technical problems is: a kind of flat seal new method, comprises following steps:
1. detected a flaw in surfacing face;
2. when surfacing, valve gap and sealing ring are put into car type furnace and is heated to 780 DEG C, insulation surfacing face is increased to 900 DEG C-1000 DEG C, carries out surfacing;
3. workpiece is put into together stove to heat---insulation------insulation---surfacing of coming out of the stove;
4., after surfacing roughing, dye penetrant inspection is carried out;
5. artificial product to be ground;
6. the flatness of laser interferometer to product is adopted to detect.
The technology used in the present invention principle is: adopt surfacing carbide alloy NI55, NI60, the minimum 0.012mm of flatness at the valve gap of valve and sealing ring contact surface.Need before surfacing to detect a flaw to surfacing face, avoid because of casting flaw cause surfacing after produce serious crackle.When surfacing, valve gap and sealing ring are put into car type furnace and is heated to 780 DEG C, insulation surfacing face is increased to 900 DEG C-1000 DEG C, carries out surfacing; Subsequently workpiece is put into together stove and carry out the complicated procedures of forming such as heating and thermal insulation, make it not ftracture.After surfacing roughing, dye penetrant inspection is carried out to product, verifies further.Finally, manually product is ground, improve the roughness of product.After grinding terminates, the flatness of laser interferometer to product is adopted to detect.
The invention has the beneficial effects as follows: implementation step of the present invention is simple, sealing surface adopts surfacing carbide alloy NI55, NI60, the sealing surface processed through the method closes under the high temperature conditions repeatedly, wear extent is minimum, sealing property, resistance to elevated temperatures, corrosion resistance and good, long product lifecycle.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the present invention is described in further detail:
A kind of flat seal new method, comprises following steps:
1. detected a flaw in surfacing face;
2. when surfacing, valve gap and sealing ring are put into car type furnace and is heated to 780 DEG C, insulation surfacing face is increased to 900 DEG C-1000 DEG C, carries out surfacing;
3. workpiece is put into together stove to heat---insulation------insulation---surfacing of coming out of the stove;
4., after surfacing roughing, dye penetrant inspection is carried out;
5. artificial product to be ground;
6. the flatness of laser interferometer to product is adopted to detect.
Surfacing carbide alloy NI55, NI60 is adopted, the minimum 0.012mm of flatness at the valve gap of valve and sealing ring contact surface.Need before surfacing to detect a flaw to surfacing face, avoid because of casting flaw cause surfacing after produce serious crackle.When surfacing, valve gap and sealing ring are put into car type furnace and is heated to 780 DEG C, insulation surfacing face is increased to 900 DEG C-1000 DEG C, carries out surfacing; Subsequently workpiece is put into together stove and carry out the complicated procedures of forming such as heating and thermal insulation, make it not ftracture.After surfacing roughing, dye penetrant inspection is carried out to product, verifies further.Finally, manually product is ground, improve the roughness of product.After grinding terminates, the flatness of laser interferometer to product is adopted to detect.
Claims (1)
1. a flat seal new method, is characterized in that comprising the following steps:
1. detected a flaw in surfacing face;
2. when surfacing, valve gap and sealing ring are put into car type furnace and is heated to 780 DEG C, insulation surfacing face is increased to 900 DEG C-1000 DEG C, carries out surfacing;
3. workpiece is put into together stove to heat---insulation------insulation---surfacing of coming out of the stove;
4., after surfacing roughing, dye penetrant inspection is carried out;
5. artificial product to be ground;
6. the flatness of laser interferometer to product is adopted to detect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410310582.3A CN105215570A (en) | 2014-06-24 | 2014-06-24 | A kind of flat seal new method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410310582.3A CN105215570A (en) | 2014-06-24 | 2014-06-24 | A kind of flat seal new method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105215570A true CN105215570A (en) | 2016-01-06 |
Family
ID=54985017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410310582.3A Pending CN105215570A (en) | 2014-06-24 | 2014-06-24 | A kind of flat seal new method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105215570A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0429900A2 (en) * | 1989-11-29 | 1991-06-05 | Mercedes-Benz Ag | Method for manufacturing hollow valves of piston motors |
| CN2448499Y (en) * | 2000-08-16 | 2001-09-19 | 张轩 | Spraying welding unit for large and middle sized ball surface |
| CN101786193A (en) * | 2010-03-22 | 2010-07-28 | 天津市富赛克阀门有限公司 | Method for spray-welding anisotropic material on cast iron valve plate |
| CN201538809U (en) * | 2009-06-08 | 2010-08-04 | 重庆富盛铸造股份有限公司 | Equipment for spraying cobalt base alloy coating on spherical surface |
-
2014
- 2014-06-24 CN CN201410310582.3A patent/CN105215570A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0429900A2 (en) * | 1989-11-29 | 1991-06-05 | Mercedes-Benz Ag | Method for manufacturing hollow valves of piston motors |
| CN2448499Y (en) * | 2000-08-16 | 2001-09-19 | 张轩 | Spraying welding unit for large and middle sized ball surface |
| CN201538809U (en) * | 2009-06-08 | 2010-08-04 | 重庆富盛铸造股份有限公司 | Equipment for spraying cobalt base alloy coating on spherical surface |
| CN101786193A (en) * | 2010-03-22 | 2010-07-28 | 天津市富赛克阀门有限公司 | Method for spray-welding anisotropic material on cast iron valve plate |
Non-Patent Citations (2)
| Title |
|---|
| 刘峰 等: ""平板阀密封面喷焊新工艺"", 《阀门》 * |
| 刘松: ""火焰喷焊炉中辅热重熔工艺"", 《热加工工艺》 * |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160106 |
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| WD01 | Invention patent application deemed withdrawn after publication |