| 摘要 |
Refining elements for refining discs of the disc refiners for the manufacture and/or treatment of fibrous or mechanical pulp, for example, board pulp, are subjected to hard abrasive wear in acid environment and at high temperature are disclosed. In order to improve the wear resistance alloys with precipitated carbides are used. An improvement in the service life in comparison with known alloys is obtained with a refining disc with the following analysis in % by weight: 2.7-3.2% C, 0.5-1.0% Si, 0.7-1.2% Mn, 21.0-26.0% Cr, 3.0-5.0% V, maximum 0.5% Ni, maximum 0.5% Mo, and the remainder Fe and impurities. After casting, the refining segments are hardened and annealed and assume a hardness of at least 55 HRC preferably between 57-63 HRC.
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