GB686766A - Improvements in or relating to austenitic alloys - Google Patents

Improvements in or relating to austenitic alloys

Info

Publication number
GB686766A
GB686766A GB2643549A GB2643549A GB686766A GB 686766 A GB686766 A GB 686766A GB 2643549 A GB2643549 A GB 2643549A GB 2643549 A GB2643549 A GB 2643549A GB 686766 A GB686766 A GB 686766A
Authority
GB
United Kingdom
Prior art keywords
per cent
ageing
alloy
temperature
ferro
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
GB2643549A
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.)
Westinghouse Electric International Co
Original Assignee
Westinghouse Electric International Co
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 Westinghouse Electric International Co filed Critical Westinghouse Electric International Co
Priority to GB2643549A priority Critical patent/GB686766A/en
Publication of GB686766A publication Critical patent/GB686766A/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
    • C22C19/00—Alloys based on nickel or cobalt
    • C22C19/03—Alloys based on nickel or cobalt based on nickel
    • C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
    • 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
    • C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Abstract

A wrought austenitic precipitation hardened alloy has the following composition: Ni 15.0-35.0 per cent, Cr 7.0-20.0 per cent, Mo or W or both 2.0-5.0 per cent; Ti 1.3-1.9 per cent, Al not more than 0.4 per cent, C less than 0.1 per cent, Mn or Si or both 0.3-3.0 per cent, impurities such as P, Cu, S, N up to 1.0 per cent and Fe the balance. In making the alloys Fe, Ni and Mo are melted in a furnace having a magnesia or mixed magnesia and alumina crucible or lining, the melt is deoxidised with a Ca-Si alloy and an inert slag is added, ferro-alloys such as ferro-chromium and ferro-titanium, e.g. one containing 27.0-32.0 per cent Ti or one containing 30.0 per cent Ti and less than 2.4 per cent Al with the balance iron are then added with the deoxidizers through the slag and the mixture is stirred. The alloy is poured into a ladle and held and cast by bottom pouring into a chill mould. In the production of turbine rotor discs the alloy is heated to 1550-1700 DEG F and forged in stages with intermediate reheatings to within the same temperature range. The article is then solution-treated at 1800-2000 DEG F and aged at 1300-1450 DEG F. Ageing treatment may be carried out by moderately rapid heating to the ageing temperature, ageing at 1350-1450 DEG F for 4-20 hours, cooling from the initial ageing temperature to a low ageing temperature of 1175-1250 DEG F in 1-10 hours, holding at this temperature for 8-24 hours and cooling in the furnace or in air to room temperature. Specifications 232,656, [Class 82(i)], 375,777, 461,534, 531,466, 583,845, 638,007 and 686,764 are referred to.
GB2643549A 1949-10-14 1949-10-14 Improvements in or relating to austenitic alloys Expired GB686766A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2643549A GB686766A (en) 1949-10-14 1949-10-14 Improvements in or relating to austenitic alloys

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2643549A GB686766A (en) 1949-10-14 1949-10-14 Improvements in or relating to austenitic alloys

Publications (1)

Publication Number Publication Date
GB686766A true GB686766A (en) 1953-01-28

Family

ID=10243568

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2643549A Expired GB686766A (en) 1949-10-14 1949-10-14 Improvements in or relating to austenitic alloys

Country Status (1)

Country Link
GB (1) GB686766A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1312691A1 (en) * 2001-11-16 2003-05-21 Usinor Austenitic heat resistant alloy with improved castability and transformation, method of making steel slabs and wires

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1312691A1 (en) * 2001-11-16 2003-05-21 Usinor Austenitic heat resistant alloy with improved castability and transformation, method of making steel slabs and wires

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