GB681247A - Improvements in refractory steels or alloys resisting high temperatures, chiefly forgas turbines - Google Patents

Improvements in refractory steels or alloys resisting high temperatures, chiefly forgas turbines

Info

Publication number
GB681247A
GB681247A GB27730/48A GB2773048A GB681247A GB 681247 A GB681247 A GB 681247A GB 27730/48 A GB27730/48 A GB 27730/48A GB 2773048 A GB2773048 A GB 2773048A GB 681247 A GB681247 A GB 681247A
Authority
GB
United Kingdom
Prior art keywords
per cent
cooling
heating
turbines
forgas
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.)
Expired
Application number
GB27730/48A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rateau SA
Original Assignee
Rateau SA
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.)
Filing date
Publication date
Application filed by Rateau SA filed Critical Rateau SA
Publication of GB681247A publication Critical patent/GB681247A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/52—Ferrous alloys, e.g. steel alloys containing chromium with nickel with cobalt

Abstract

A steel which will resist creep, and is particularly applicable for the manufacture of parts of gas turbines, has the following composition:-C 0.1-0.6 per cent; Si 0.5-2.5 per cent; Cr 14.0-25.0 per cent; Ni 7.0-25.0 per cent; W 5.1-15.0 per cent; Co 4.0-25.0 per cent; Ti 0-2.5 per cent; one or both of Nb and Ta 0-2.5 per cent; Fe and impurities the balance; and is subjected to thermal treatment comprising a heating between 855 DEG C and 1300 DEG C. Steels having the composition specified in the parent Specification may also be subjected to this heat treatment. The treatment may be at 1100 DEG C-1300 DEG C for 1/2 to 2 hours followed by slow or quick cooling or alternatively it may comprise two consecutive heatings at the high temperature each followed by slow or quick cooling and the cooling after the last heating may be followed by annealing at 850-950 DEG C for 4-8 hours. Thus treatment may comprise the following series of operations, heating for 1 hour at 1150 DEG C, cooling in air or water, heating for 1/2 -1 hour at 1175 DEG C or 1200 DEG C cooling in air, and finally annealing at 900-925 for 6 hours.
GB27730/48A 1947-10-27 1948-10-25 Improvements in refractory steels or alloys resisting high temperatures, chiefly forgas turbines Expired GB681247A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR681247X 1947-10-27

Publications (1)

Publication Number Publication Date
GB681247A true GB681247A (en) 1952-10-22

Family

ID=9022716

Family Applications (1)

Application Number Title Priority Date Filing Date
GB27730/48A Expired GB681247A (en) 1947-10-27 1948-10-25 Improvements in refractory steels or alloys resisting high temperatures, chiefly forgas turbines

Country Status (1)

Country Link
GB (1) GB681247A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3127265A (en) * 1964-03-31 Table ii

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3127265A (en) * 1964-03-31 Table ii

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