| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing a bearing-steel wire rod by which the amount of filling of gas for maintaining reducing atmosphere in a furnace can be reduced and also the consumption of pickling solution can be reduced and further the material loss of the wire rod can be reduced. SOLUTION: A bearing-steel wire rod 1 after rolling is subjected to pickling treatment, by which, between Fe scale 3 and Cr scale 2 each formed on the surface, the Fe scale 3 formed on the outermost surface is removed. At this pickling treatment, the acid concentration of the pickling solution is regulated to produce the condition where the removal of the Fe scale 3 can precede the removal of the Cr scale 2, and immersion time is regulated to finish the pickling in a state where the Cr scale 2 is left on the surface of the bearing-steel wire rod 1 though the Fe scale 3 is not left practically. Then annealing treatment is performed in a state where the Cr scale 2 which is relatively stable at high temperature is allowed to remain.
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