Patent ID: 9732395
Date: 2017-08-15
CPC Classifications: B22D,C21D,C22C,F16C

Claim:
1. An ingot material for bearings comprising a chemical composition containing: C: 0.56 mass % or more and 0.70 mass % or less; Si: 0.15 mass % or more and less than 0.50 mass %; Mn: 0.60 mass % or more and 1.50 mass % or less; Cr: 0.50 mass % or more and 1.10 mass % or less; Mo: 0.05 mass % or more and 0.5 mass % or less; P: 0.025 mass % or less; S: 0.025 mass % or less; Al: 0.005 mass % or more and 0.500 mass % or less; O: 0.0015 mass % or less; N: 0.0030 mass % or more and 0.015 mass % or less; and the balance including Fe and incidental impurities, wherein a degree of segregation defined by the following formula (1) is 2.8 or less, and a predicted value of the maximum diameter of inclusions present in 30000 mm where C