Patent ID: 6764554
Filing Date: 2004-07-20
Classification: B02C,C22C,D21D

Abstract:
A refining element for use in a refining disk in disk refiners for the treatment of fibrous pulp material, said refining element comprising a heat-treated cast steel alloy having a hardness of at least 55 HRC and comprising from about 2.7 to 3.2 percent by weight C, from about 0.5 to 1.0 percent by weight Si, from about 0.7 to 1.2 percent by weight Mn, from about 21.0 to 26.0 percent by weight Cr, from about 3.0 to 6.0 percent by weight V, up to about 0.5 percent by weight Ni, and up to about 0.5 percent by weight Mo.