Case hardening method for high performance long life martensitic stainless steel bearings
US10119175B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 24, 2014 |
| Grant date | Nov 6, 2018 |
| Priority date | — |
| Expiry date | Feb 24, 2035 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2223/16
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for cost effectively case hardening a component formed from a martensitic stainless steel material with a desired metallurgical condition for high temperature, high rolling contact fatigue, corrosion and spall initiation and propagation resistance bearing performance. The method describes a method to significantly reduce the carburization or carbo-nitriding process times for appreciable reduction in manufacturing cost. The Method includes the steps of: forming the component from a martensitic stainless steel material having an ASTM grain size of 9 or finer; and subjecting the component to one of a carburization and a carbo-nitriding treatment with significantly lower case hardening times for manufacturing cost-effectiveness.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.