Patent ID: 6245289
Filing Date: 2001-06-12
Classification: C21D,C22C

Abstract:
A portion of an apparatus for processing papermaking fibers comprising a refiner disk having a composition consisting essentially of from about 0.2 percent to about 0.6 percent carbon, from about 0.5 to about 1.5 percent manganese, about 0.5 percent to about 1.5 percent silicon, a maximum of 0.05 percent sulfur, a maximum of 0.05 percent phosphorus, from about 14 percent to about 18 percent chromium, from about 2 percent to about 5 percent nickel, from about 2 percent to about 4 percent copper, a maximum of about 1 percent molybdenum, from about 1.5 percent to about 5.0 percent niobium, a maximum of 1.5 percent vanadium, and a maximum of 0.5 percent total of elements selected from at least one of rare earth metals and magnesium, the balance essentially iron with incidental impurities.