(19)
(11) EP 0 120 441 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
01.07.1987 Bulletin 1987/27

(43) Date of publication A2:
03.10.1984 Bulletin 1984/40

(21) Application number: 84103048

(22) Date of filing: 20.03.1984
(84) Designated Contracting States:
CH DE FR GB IT LI NL SE

(30) Priority: 28.03.1983 US 479707

(71) Applicant: KENNAMETAL INC.
 ()

(72) Inventor:
  • Evans, Donald R.
     ()

   


(54) Roll for hot forming steel rod


(57) Disclosed herein is a carbide roll having an improved composition for hot forming steel rod in multi-stand rolling mills. The improved composition comprises the addition of nickel as a binder material to a normal tungsten carbide-cobalt roll composition, preferably, so that the composition by volume is approximately: tungsten carbide-70 percent; nickel-10 percent; and cobalt- 20 percent. A dual composition is disclosed, wherein the above composition forms the inner layer of the roll and an outer layer may be composed of, by volume, tungsten carbide - 70 percent and cobalt - 30 percent.





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