(19)
(11) EP 1 422 306 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
12.04.2006 Bulletin 2006/15

(43) Date of publication A2:
26.05.2004 Bulletin 2004/22

(21) Application number: 03445110.4

(22) Date of filing: 10.10.2003
(51) International Patent Classification (IPC): 
C22C 29/04(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
Designated Extension States:
AL LT LV MK

(30) Priority: 19.11.2002 SE 0203407

(71) Applicant: Sandvik Intellectual Property AB
811 81 Sandviken (SE)

(72) Inventors:
  • Zwinkels, Marco
    17237 Sundbyberg (SE)
  • Weinl, Gerold
    12552 Alvsjö (SE)
  • Rolander, Ulf
    11264 Stockholm (SE)

(74) Representative: Taquist, Henrik Lennart Emanuel et al
Sandvik AB, Intellectual Property
811 81 Sandviken
811 81 Sandviken (SE)

   


(54) Ti(C,N)-(Ti,Nb,W)(C,N)-Co alloy for super-finishing turning cutting tool applications


(57) The present invention relates to a titanium based carbonitride alloy containing Ti, Nb, W, C, N and Co for metal cutting applications, in particularly superfinishing turning operations. The alloy contains in addition to Ti 3-<9 at% Co with only impurity levels of Ni and Fe, 2-<4 at% Nb, 3-8 at% W and has a C/(C+N) ratio of 0.50-0.75. The amount of undissolved Ti(C,N) cores (A) should be kept between 26 and 37 vol% of the hard constituents, the balance being one or more complex carbonitrides (B) containing Ti, Nb and W. The invented alloy is particularly useful for superfinishing of steel and cast iron.







Search report