MANUFACTURING METHOD OF BEARING STEEL WIRE HAVING EXCELLENT WORKABILITY, AND BEARING STEEL WIRE MANUFACTURED BY THE METHOD

摘要

PROBLEM TO BE SOLVED: To provide a bearing steel wire manufacturing method in which generation of pearlite structure of narrow lamellar gap harmful for the drawability in a cooling step after the hot rolling of a bearing steel wire is suppressed, the hardness is <=30 HRC, and the drawability as hot-rolled is excellent. SOLUTION: When obtaining the rolled wire of the bearing steel composition with the hardness of <=30 HRC after the hot rolling according to the steps shown in Fig. 2, the cooling speed of the rolled wire is reduced by setting the intervals of the coiled wires to be <=100 mm, and the outside diameter of the coil to be <=1,300 mm when finish-coiling the wire.