STEELMAKING EQUIPMENT BEARING COMPONENT, STEELMAKING ROLLING BEARING, AND STEELMAKING EQUIPMENT

摘要

PROBLEM TO BE SOLVED: To provide a steelmaking equipment rolling bearing having sufficient durability and improved dimensional stability, and also to provide a steelmaking equipment bearing component constituting the rolling bearing, and steelmaking equipment equipped therewith in improved durability.;SOLUTION: An outer ring 2, an inner ring 3 and a tapered roller 7 constituting the rolling machine roll neck rolling bearing are each formed of steel which contains 0.7-1.2% carbon, 0.1-1.1% silicon, and 0.25-1.5% manganese, and consists of iron in the rest and impurities. In regions including an outer ring rolling surface 2A, an inner ring rolling surface 3A and a roller rolling surface 7A, an outer ring nitrogen enriched layer 2B, an inner ring nitrogen enriched layer 3B and a roller nitrogen enriched layer 7B are formed, respectively. The outer ring nitrogen enriched layer 2B, the inner ring nitrogen enriched layer 3B and the roller nitrogen enriched layer 7B, each include a bainite structure where a remaining austenite amount is held down to 5 vol% or less.;COPYRIGHT: (C)2010,JPO&INPIT