Bearing component
US-2024401643-A1 · Dec 5, 2024 · US
Bearing ring and rolling bearing
US9709099B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9709099-B2 |
| Application number | US-201514876157-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 6, 2015 |
| Priority date | Oct 17, 2014 |
| Publication date | Jul 18, 2017 |
| Grant date | Jul 18, 2017 |
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- Title
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- Abstract
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- First independent claim
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Abstract
Official abstract text for this publication.
A bearing ring formed of quenched and tempered high carbon chromium bearing steel, including an inner layer portion formed of tempered martensite or sorbite and having a Vickers hardness of more than 490 HV and 710 HV or less, and a surface layer portion formed to enclose an entire periphery of the inner layer portion, formed of tempered martensite, and having a higher hardness than the inner layer portion.
First claim
Opening claim text (preview).
What is claimed is: 1. A bearing ring formed of quenched and tempered high carbon chromium bearing steel, comprising: an inner layer portion formed of tempered martensite or sorbite and having a Vickers hardness of more than 490 HV and 710 HV or less; and a surface layer portion formed to enclose an entire periphery of the inner layer portion, formed of tempered martensite, and having a higher hardness than the inner layer portion, wherein a Vickers hardness of the surface layer portion gradually decreases from an outermost surface of the surface layer portion, along a thickness of the surface layer portion, toward the inner layer portion. 2. The bearing ring according to claim 1 , wherein the inner layer portion has a Vickers hardness of more than 490 HV and 620 HV or less. 3. The bearing ring according to claim 2 , wherein the tempering is performed under a condition that an internal temperature of a steel material of high carbon chromium bearing steel is higher than a surface temperature of the steel material. 4. A rolling bearing including an inner ring with a raceway portion on an outer peripheral surface of the inner ring, an outer ring with a raceway portion on an inner peripheral surface of the outer ring, and a plurality of rolling elements arranged between the raceway portions of the inner and outer rings, wherein at least one of the inner ring and the outer ring is the bearing ring according to claim 3 . 5. A rolling bearing including an inner ring with a raceway portion on an outer peripheral surface of the inner ring, an outer ring with a raceway portion on an inner peripheral surface of the outer ring, and a plurality of rolling elements arranged between the raceway portions of the inner and outer rings, wherein at least one of the inner ring and the outer ring is the bearing ring according to claim 2 . 6. The bearing ring according to claim 1 , wherein the tempering is performed under a condition that an internal temperature of a steel material of high carbon chromium bearing steel is higher than a surface temperature of the steel material. 7. A rolling bearing including an inner ring with a raceway portion on an outer peripheral surface of the inner ring, an outer ring with a raceway portion on an inner peripheral surface of the outer ring, and a plurality of rolling elements arranged between the raceway portions of the inner and outer rings, wherein at least one of the inner ring and the outer ring is the bearing ring according to claim 6 . 8. A rolling bearing including an inner ring with a raceway portion on an outer peripheral surface of the inner ring, an outer ring with a raceway portion on an inner peripheral surface of the outer ring, and a plurality of rolling elements arranged between the raceway portions of the inner and outer rings, wherein at least one of the inner ring and the outer ring is the bearing ring according to claim 1 .
Assignees
Inventors
Classifications
with more than 1.7% by weight of carbon · CPC title
Hardness · CPC title
with chromium as the next major constituent · CPC title
for rings; for bearing races · CPC title
- F16C33/62Primary
Selection of substances · CPC title
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Frequently asked questions
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- What does patent US9709099B2 cover?
- A bearing ring formed of quenched and tempered high carbon chromium bearing steel, including an inner layer portion formed of tempered martensite or sorbite and having a Vickers hardness of more than 490 HV and 710 HV or less, and a surface layer portion formed to enclose an entire periphery of the inner layer portion, formed of tempered martensite, and having a higher hardness than the inner l…
- Who is the assignee on this patent?
- Jtekt Corp
- What technology area does this patent fall under?
- Primary CPC classification F16C33/62. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Jul 18 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).