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US 6,333,001 B1Granted
Micro-alloyed steel rolling bearings
AssigneeOvaka Steel AB
InventorsRainer R. Leppänen, John Beswick
Life of this patent
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Abstract
A micro-alloyed steel for rolling bearings and especially for HBU/THU forgings with improved yield strength in “as forged condition. The steel has the following composition 0.5-0.7% C, 0-0.6% Si, 0.4-1.2% Mn, 0-0.035% S, 0.05-2.0% V, 80-160 ppm N, the remainder iron and ordinary impurities.
Claims8
A hub bearing unit comprising at least one component made from steel having a composition consisting essentially of:
- 0.7%≧C>0.50%
- 0-0.6% Si
- 0.4-1.2% Mn
- 0-0.035% S
- 0.05-0.2% V
- 80-160 ppm N and
- the remainder iron and ordinary impurities;
- wherein said steel has a 0.2 % yield strength of at least appoximately 560 MPa.
5 more elements
A tapered hub bearing unit comprising at least one component made from steel having a composition consisting essentially of:
- 0.7%≧C>0.50%
- 0-0.6% Si
- 0.4-1.2% Mn
- 0-0.035% S
- 0.05-0.2% V
- 80-160 ppm N and
- the remainder iron and ordinary impurities;
- wherein said steel has a 0.2 % yield strength of at least approximately 560 MPa.
5 more elements
Dependencies are inferred from the claim text.