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 steel

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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
Application number
SU1974937A
Other languages
Russian (ru)
Inventor
Елена Павловна Кириченко
Алексей Михайлович Бугаев
Евгения Михайловна Телешева
Зинаида Николаевна Петропавловская
Original Assignee
Харьковский Ордена Ленина Турбинный Завод Им.С.М.Кирова
Priority date (The priority date 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 date listed.)
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Publication date
Application filed by Харьковский Ордена Ленина Турбинный Завод Им.С.М.Кирова filed Critical Харьковский Ордена Ленина Турбинный Завод Им.С.М.Кирова
Priority to SU1974937A priority Critical patent/SU472983A1/en
Application granted granted Critical
Publication of SU472983A1 publication Critical patent/SU472983A1/en

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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

SU1974937A 1973-12-14 1973-12-14 The method of heat treatment of steam turbine blades of chromium steel SU472983A1 (en)

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

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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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