JPS5483605A - Manufacture of steam valve - Google Patents
Manufacture of steam valveInfo
- Publication number
- JPS5483605A JPS5483605A JP15045577A JP15045577A JPS5483605A JP S5483605 A JPS5483605 A JP S5483605A JP 15045577 A JP15045577 A JP 15045577A JP 15045577 A JP15045577 A JP 15045577A JP S5483605 A JPS5483605 A JP S5483605A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- steam
- contact surfaces
- valve disc
- laser beam
- 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
Landscapes
- Lift Valve (AREA)
- Laser Beam Processing (AREA)
Abstract
PURPOSE:To provide an effective steam valve, by melting respective contact surfaces between valve disc and valve spindle, valve disc and valve seat with laser beam, then by cooling the molten zones rapidly to form amorphous metallic layers at the contact surfaces. CONSTITUTION:Respective contact surfaces 10, 9 between valve disc 4 and valve spindle 3, valve disc 4 and valve seat 5 of a steam valve used for power-generating steam turbine is irradiated with a laser beam 12 in order to melt and unite with each other. Then the molten zone is cooled rapidly to form amorphous metallic layers 11 on both surfaces 10, 9. These layers 11 are very hard and prevented satisfactorily from burning or erosion due to steam. By this method, because there is no residual stress due to metals of different kinds, formation of stress corrosion cracking is prevented during operation of the turbine, consequently operation safety is improved.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15045577A JPS5483605A (en) | 1977-12-16 | 1977-12-16 | Manufacture of steam valve |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15045577A JPS5483605A (en) | 1977-12-16 | 1977-12-16 | Manufacture of steam valve |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5483605A true JPS5483605A (en) | 1979-07-03 |
Family
ID=15497293
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15045577A Pending JPS5483605A (en) | 1977-12-16 | 1977-12-16 | Manufacture of steam valve |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5483605A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110193702A (en) * | 2019-06-17 | 2019-09-03 | 哈尔滨汽轮机厂有限责任公司 | A kind of processing method of umbrella shape valve disc |
-
1977
- 1977-12-16 JP JP15045577A patent/JPS5483605A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110193702A (en) * | 2019-06-17 | 2019-09-03 | 哈尔滨汽轮机厂有限责任公司 | A kind of processing method of umbrella shape valve disc |
CN110193702B (en) * | 2019-06-17 | 2021-02-12 | 哈尔滨汽轮机厂有限责任公司 | Processing method of umbrella-shaped valve disc |
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