GB792731A - Pre-annealing treatment of titanium metal - Google Patents

Pre-annealing treatment of titanium metal

Info

Publication number
GB792731A
GB792731A GB3012655A GB3012655A GB792731A GB 792731 A GB792731 A GB 792731A GB 3012655 A GB3012655 A GB 3012655A GB 3012655 A GB3012655 A GB 3012655A GB 792731 A GB792731 A GB 792731A
Authority
GB
United Kingdom
Prior art keywords
nitrate
composition
titanium
annealing
diluent
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
GB3012655A
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.)
GORDON JOSEPH ADAMS
Imperial Chemical Industries Ltd
Original Assignee
GORDON JOSEPH ADAMS
Imperial Chemical Industries Ltd
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 GORDON JOSEPH ADAMS, Imperial Chemical Industries Ltd filed Critical GORDON JOSEPH ADAMS
Priority to GB3012655A priority Critical patent/GB792731A/en
Publication of GB792731A publication Critical patent/GB792731A/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22FCHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/16Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
    • C22F1/18High-melting or refractory metals or alloys based thereon
    • C22F1/183High-melting or refractory metals or alloys based thereon of titanium or alloys based thereon
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22FCHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/008Using a protective surface layer

Landscapes

  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Abstract

Before annealing titanium or titanium-base alloys at a temperature not exceeding 800 DEG C., a composition comprising an alkali metal nitrate is applied to the surface thereof, the effect of said composition being to make easier the subsequent removal of scale in a pickling solution such as one comprising nitric acid and hydrofluoric acid. The nitrate should have a melting point below the annealing temperature and is preferably sodium nitrate. To reduce its fluidity, the nitrate may be admixed with a diluent such as one or more alkali metal carbonates, e.g. sodium carbonate; a suitable composition is, by weight, nitrate 10-100 per cent, diluent 90-0 per cent. The composition may be applied (a) as a powder by sprinkling on a titanium surface which has been previously cleaned and wetted by a detergent solution, or (b) as a boiling, saturated solution. Annealing is generally performed at 650 DEG -750 DEG C. for 3 hours to 1/2 -hour.
GB3012655A 1955-10-21 1955-10-21 Pre-annealing treatment of titanium metal Expired GB792731A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3012655A GB792731A (en) 1955-10-21 1955-10-21 Pre-annealing treatment of titanium metal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3012655A GB792731A (en) 1955-10-21 1955-10-21 Pre-annealing treatment of titanium metal

Publications (1)

Publication Number Publication Date
GB792731A true GB792731A (en) 1958-04-02

Family

ID=10302707

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3012655A Expired GB792731A (en) 1955-10-21 1955-10-21 Pre-annealing treatment of titanium metal

Country Status (1)

Country Link
GB (1) GB792731A (en)

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