Home › chapter › 10.57640 › AIDAA 2019 PRODUCTION OF AEROSPACE – GRADE TITANIUM-6ALUMINIUM-4VANADIUM BARS BY SKULL MELTING + VAREMELTIN

AIDAA 2019 PRODUCTION OF AEROSPACE – GRADE TITANIUM-6ALUMINIUM-4VANADIUM BARS BY SKULL MELTING + VAREMELTIN

Author

M. Costanzi Dir. of Technologies and R&D, TiFast SrL, Z.na Ind.le San Liberato di Narni (TR), Italy
Email: mcostanzi@tifast.com

Abstract

In the present paper the production of Aerospace – grade bars from Titanium alloys by TiFast is presented with particular focus on the Skull Melting + VARemelting production cycle. The SM technology, initially developed in the USSR, was applied by Tifast to a West-standardized fabrication route. The SM technology is a form of cold-hearth remelting, suitable for the recovery of scrap of virtually any composition, shape and size. Sponge and master alloys can be added as well. The ingot produced by a SM furnace can be remelted, i.e. used as a consumable electrode, via another type of furnace; TiFast chose the classic Vacuum Are Remelting furnace (VAR) for its production. Via the SM+VAR (or SM+ VAR+VAR) process, TiFast produced sound Titanium ingots from alloys like: CP Titanium, Modified Titanium, Ti-

6A1-4V, TI-GAI-4V ELI, TI-6A1-7Nb, Ti-3A1-2.5V. These ingols were sold as such or transformed by TiFast into bars and billets. The bars and other products produced via the SM+VAR process have characteristics that make them undistinguishable from those obtained via other processes. Therefore the SM+VAR process presents itself as a technically and economically viable production route to high – standard Titanium items, to be used in chemical, medical, automotive and aerospace industry.

Keywords

Titanium; Skull Melting; VAR; bar

​1–14​

References

  1. 1.
    Housley KL. Black Sand: The History of Titanium. JOM; 2006.
  2. 2.
    Paige JI, Redden TK. Melting of Nitride Seeded Ti-6Al-4V Alloy Ingots. JOM. Published online March 1988:26-28. doi:10.1007/bf03258937
  3. 3.
    Musatov MI, Freedman A A sh., Tschubarov VN. Quality of ingots melted in a skull furnace. In: Titanium and Titanium Alloys. Vol 1. Scientific and Technological Aspects. N.D.; 1976:N.D.
  4. 4.
    Musatov MI, Freedman ASh, Sukhorosov BN. Five -tonne Titanium Ingots produced by skull melting. In: Titanium ’92: Science and Technology. Vol 3. N.D.; 1993:N.D.
  5. 5.
    Andreev AL, Mescheryako AI. Exploitation and development trends of large vacuum – are skull melting furnaces. In: Titanium and Titanium Alloys, Scientific and Technological Aspects. Vol 3. N.D.; 1976:N.D.
  6. 6.
    Levin IV, Mussatov MI, Puzakov IY, Tarenkova NY. РАЭВИТИЕ ГАРНИСАЖНОЙ ПЛАВКИ
ТИТАНОВЫІХ СПЛАВОВ. Titan. 2008;1(22).
  7. 7.
    Voevodin M. Declaration on VSMPO website. VSMPO. Accessed November 27, 2012. http://www.vsmpo.ru/en/news/182/Mihail_Voevodin_VSMPOAVISMA_Mi_dolzhni_vse_vremja_zagljadiv
at_v_zavtrashnij_den
  8. 8.
      I.Y. Puzakov, N.Y. Tarenkova, A.V. Gorina. Refining Capabilities of the Skull Melting Furnace – Production of Rotor Grade Half – . In: ; 2010.
  9. 9.
    Helm D, Roder O. Recent titanium research and development in Germany. Ti-2007 Science and Technology The Japan Institute of Metals. Published online 2007:25-32.
  10. 10.
    Fischer D, Guglielmi F. Skull melting, an alternative melting process for the production of Ti 6AL-4V aerospace plates. Japan Institute of Metals: Kyoto, Japan. Published online 2007:4.
  11. 11.
    Tetyukhin V, Savelyev V, Musatov V, Chuchuryukin A, Ilyenko V, Butsev B. Gaseous stabilized interstitial inclusions in titanium ingots and products. Titanium’95- Science and technology. Published online 1996:2104-2110.
  12. 12.
    Коцарь М, Лавриков С, Никонов В, et al. Высокая чистота основы титановых сплавов–залог продления срока службы изделий из них в ядерной энергетике и стабильности свойств в медицинской технике. Титан. 2012;(3):10-16.
  13. 13.
    Rosenberg H. Titanium alloying in theory and practice. In: The Science, Technology and Application of Titanium. Elsevier; 1970:851-859.
  14. 14.
    Molchanova E. Phase Diagrams of Titanium Alloys Israel Program for Scientific Translations. Jerusalem. 1965;90:93.

About this paper

Cite this paper

Costanzi, M.: AIDAA 2019 PRODUCTION OF AEROSPACE – GRADE TITANIUM-6ALUMINIUM-4VANADIUM BARS BY SKULL MELTING + VAREMELTIN. vol. 1, no. 1, 0000, ISBN: 979-1-259-56006-3. https://doi.org/

Download citation

.BIB