Bearing steel excellent in rolling-contact fatigue properties and method for producing same
US9624559B2 · kind B2 · utility
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Key dates
| Filing date | Mar 5, 2013 |
| Grant date | Apr 18, 2017 |
| Priority date | — |
| Expiry date | Jul 2, 2033 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C33/64
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A bearing component having increased rolling-contact fatigue life, the bearing component being made of a bearing steel that satisfies a predetermined chemical composition, and Si (boundary Si), Mn (boundary Mn), Cr (boundary Cr), Cu (boundary Cu), Ni (boundary Ni), and Mo (boundary Mo) included in a matrix phase region (boundary surface region) from the surface of spheroidized cementite to 20 nm away satisfy the formula:9.0≦1.4×boundary Si+1.8×boundary Mn+5.5×boundary Cu+4.2×boundary Ni+4.8×boundary Cr+5.5×boundary Mo.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.