JPS57164921A - Surface hardening method for steam turbine blade - Google Patents
Surface hardening method for steam turbine bladeInfo
- Publication number
- JPS57164921A JPS57164921A JP4718281A JP4718281A JPS57164921A JP S57164921 A JPS57164921 A JP S57164921A JP 4718281 A JP4718281 A JP 4718281A JP 4718281 A JP4718281 A JP 4718281A JP S57164921 A JPS57164921 A JP S57164921A
- Authority
- JP
- Japan
- Prior art keywords
- steam turbine
- plasma
- blades
- plasma jet
- jet flames
- 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
- Turbine Rotor Nozzle Sealing (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
PURPOSE: To form surface hardened layers of high erosion resistance by irradiating plasma jet flames using an inert gas added with nitrogen as a working gas to steam turbine blades consisting of 12% Cr alloy steel.
CONSTITUTION: Plasma jet flames 5 are irradiated by using a plasma touch 6 to steam turbine blades made of 12% Cr alloy steel. An inert gas such as Argon added with 30% gaseous nitrogen is used as a working gas and an 100% gaseous nitrogen is used as a shielding gas 4. Plasma arcs are generated by flowing electric current between a nozzle 2 and a tungsten electrodes 1 and plasma jet flames 5 are irradiated to heat the blades 7 without melting the same, whereby the hardened layers of high erosion resistance are formed on the surfaces of the blades 7 in a short time.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4718281A JPS57164921A (en) | 1981-04-01 | 1981-04-01 | Surface hardening method for steam turbine blade |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4718281A JPS57164921A (en) | 1981-04-01 | 1981-04-01 | Surface hardening method for steam turbine blade |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57164921A true JPS57164921A (en) | 1982-10-09 |
Family
ID=12767937
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4718281A Pending JPS57164921A (en) | 1981-04-01 | 1981-04-01 | Surface hardening method for steam turbine blade |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57164921A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002009905A1 (en) * | 2000-07-29 | 2002-02-07 | Mtu Aero Engines Gmbh | Method and device for hardening a metal component by plasma pulse technology |
KR100600972B1 (en) | 2004-11-16 | 2006-07-13 | 두산중공업 주식회사 | Heat Treatment Method of Blade Material to Remove Delta Ferrite |
-
1981
- 1981-04-01 JP JP4718281A patent/JPS57164921A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002009905A1 (en) * | 2000-07-29 | 2002-02-07 | Mtu Aero Engines Gmbh | Method and device for hardening a metal component by plasma pulse technology |
JP2004505174A (en) * | 2000-07-29 | 2004-02-19 | エムテーウー・アエロ・エンジンズ・ゲーエムベーハー | Method and apparatus for pulsed plasma enhancement of metal parts |
US7166175B2 (en) | 2000-07-29 | 2007-01-23 | Mtu Aero Engines Gmbh | Method and device for hardening a metal component by plasma pulse technology |
KR100600972B1 (en) | 2004-11-16 | 2006-07-13 | 두산중공업 주식회사 | Heat Treatment Method of Blade Material to Remove Delta Ferrite |
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