SU472983A1 - The method of heat treatment of steam turbine blades of chromium steel - Google Patents
The method of heat treatment of steam turbine blades of chromium steelInfo
- Publication number
- SU472983A1 SU472983A1 SU1974937A SU1974937A SU472983A1 SU 472983 A1 SU472983 A1 SU 472983A1 SU 1974937 A SU1974937 A SU 1974937A SU 1974937 A SU1974937 A SU 1974937A SU 472983 A1 SU472983 A1 SU 472983A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- heat treatment
- steam turbine
- turbine blades
- chromium steel
- temperature
- Prior art date
Links
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- Heat Treatment Of Articles (AREA)
Description
1one
Изобретение относитс к области термической обработки черных металлов.This invention relates to the field of heat treatment of ferrous metals.
Известен способ термической обработки заготовок лопаток паровых турбин, например, из стали 1Х11МФ, включающий закалку с температуры 1000°С в масле и отпуск при 680- 700°С с охлаждением на воздухе. Однако, отмечаютс пониженные прочностные свойства и предел усталости, расположение критической температуры хрупкости в районе температур, близких к рабочим, что увеличивает склонность материала к хрупкому разрушению.A known method of heat treatment of blanks of steam turbine blades, for example, from steel 1H11MF, including quenching from a temperature of 1000 ° C in oil and tempering at 680-700 ° C with air cooling. However, there are lower strength properties and a fatigue limit, the location of the critical temperature of brittleness in the region of temperatures close to the workers, which increases the tendency of the material to brittle fracture.
Цель изобретени - повышение прочностных характеристик и ударной в зкости, а также предела усталости хромистых нержавеющих сталей, например 1Х11МФ, при сохранении пластичности на прежнем уровне и при смещении критической температуры хрупкости в область отрицательных температур. Это достигаетс путем применени изотермической закалки с выдержкой в области температур 250-300°С с последующим отпуском при 300-400°С.The purpose of the invention is to increase the strength characteristics and toughness, as well as the fatigue limit of chromium stainless steels, for example 1H11MF, while maintaining plasticity at the same level and when the critical temperature of brittleness is shifted to negative temperatures. This is achieved by applying isothermal quenching with a holding in the temperature range 250-300 ° C, followed by tempering at 300-400 ° C.
Пример. Заготовки стали 1ХПМФ нагревают в электропечи до температуры выше АсзExample. Billet steel 1HPMF heated in an electric furnace to a temperature above Asz
(1000°С), выдерживают 2 час и перенос т в селитровую ванну с температурой 250-300°С, выдерживают 1 час, затем охлаждают на воздухе или в масле. Отпуск после изотермической закалки производ т в электропечи при(1000 ° C), incubated for 2 hours and transferred to a saltpeter bath with a temperature of 250-300 ° C, incubated for 1 hour, then cooled in air or in oil. Vacation after isothermal quenching is performed in an electric furnace at
температуре не вьипе 400°С в течение 6 час.temperature not over 400 ° C for 6 hours.
В таблице приведены данные по определению служебных свойств. 34The table shows the data on the definition of service properties. 34
Предмет изобретени щнйс тем, что, с целью повышени прочиеThe subject of the invention is that, in order to increase
Способ термичеекой обработки лопаток па- стичности, нроизвод т изотермичеекую закалровых турбин нз хромистых еталей, включаю-ку е выдержкой нри 250-300°С и ноеледую1ЦИЙ закалку с 1000°С и отпуск, отличаю- 5 щим отнуском при 300-400°С.The method of heat treatment of the blades of the patient, the production of isothermal quenching turbines on chromium etals, including shutter speeds of 250-300 ° C and non-quenched hardening from 1000 ° C and tempering, differs from 300 to 400 ° C.
472983 472983
сти и ударной в зкоети нри сохраненни нлаstyle and percussive stance
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU1974937A SU472983A1 (en) | 1973-12-14 | 1973-12-14 | The method of heat treatment of steam turbine blades of chromium steel |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU1974937A SU472983A1 (en) | 1973-12-14 | 1973-12-14 | The method of heat treatment of steam turbine blades of chromium steel |
Publications (1)
Publication Number | Publication Date |
---|---|
SU472983A1 true SU472983A1 (en) | 1975-06-05 |
Family
ID=20569070
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU1974937A SU472983A1 (en) | 1973-12-14 | 1973-12-14 | The method of heat treatment of steam turbine blades of chromium steel |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU472983A1 (en) |
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1973
- 1973-12-14 SU SU1974937A patent/SU472983A1/en active
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