Title:
鋼材及び部品
Document Type and Number:
Japanese Patent JP7099553
Kind Code:
B2
Abstract:
There is provided a steel material that is excellent in machinability, and that provides a high roller-pitting fatigue strength, a high high-cycle bending fatigue strength, and a high low-cycle bending fatigue strength when being subjected to induction hardening to be produced into an induction-hardened component. The steel material according to the present disclosure includes a chemical composition consisting of, in mass %, C: 0.40 to 0.70%, Si: 0.15 to 2.10%, Mn: 0.30 to 1.15%, Cr: 0.01 to less than 0.50%, S: 0.005 to 0.070%, N: 0.0020 to 0.0200%, Ti: 0.0080 to 0.2000%, B: 0.0005 to 0.0050%, Al: 0.005 to 0.100%, and P: less than 0.050%, with the balance being Fe and impurities, and satisfying Formula (1) to Formula (5) described herein, and has a ferrite area fraction of 40% or less and a martensite area fraction of 10% or less.
Inventors:
Kei Miyanishi
Makoto Egashira
Makoto Egashira
Application Number:
JP2020568160A
Publication Date:
July 12, 2022
Filing Date:
January 21, 2020
Export Citation:
Assignee:
Nippon Steel Corporation
International Classes:
C22C38/00; C22C38/60
Domestic Patent References:
| JP2001181791A | ||||
| JP2017048440A |
Foreign References:
| WO2013183648A1 | ||||
| WO2015076384A1 |
Attorney, Agent or Firm:
Ascend Patent Business Corporation
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