29-06-2015 дата публикации
Номер: KR1020150072024A
Принадлежит:
The present invention provides a steel material for bearings which comprises: 0.70-0.90 wt% of C, 0.10-0.40 wt% of Si, 0.60-1.00 wt% of Mn, 0.025 wt% or less of P (0 means P not included), 0.025 wt% or less of S (0 means S not included), 0.30 wt% or less of Ni (0 means Ni not included), 0.60-1.00 wt% of Cr, 0.10 wt% or less of Mo (0 means Mo not included), 0.010-0.020wt. % of Al, Fe and inevitable impurities making up the remaining content. Also the present invention provides a method for manufacturing the same which comprises: (a) step to perform continuous casting of the steel material consisting of 0.70-0.90 wt% of C, 0.10-0.40 wt% of Si, 0.60-1.00 wt% of Mn, 0.025 wt. % or less of P (0 means P not included), 0.025 wt% or less of S (0 means S not included), 0.30 wt% or less of Ni (0 means Ni not included), 0.60-1.00 wt% of Cr, 0.10 wt. % or less of Mo (0 means Mo not included), 0.010-0.020 wt% of Al, Fe and inevitable impurities making up the remaining content at the casting speed of ...
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