Pair of guiding elements of which one is made of specific steel leading to improved anti-seizing performances
US9273386B2 · kind B2 · utility
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39Claims
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Key dates
| Filing date | Apr 21, 2006 |
| Grant date | Mar 1, 2016 |
| Priority date | — |
| Expiry date | Apr 1, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2223/14
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A pair of guiding elements is characterized in that at least one of its elements is made of a steel containing at least 0.15 to 0.3% by weight of carbon, 2 to 5% (preferably 2 to 3%) by weight of chromium, at least 0.45% (preferably no greater than 0.9%) by weight of molybdenum, and at least 0.01% by weight and no greater than 0.5% (preferably no greater than 0.3%) of vanadium. This steel is nitrided after being shaped whereby obtaining a compound layer consisting of iron and nitrogen atoms of a thickness ranging from 5 to 50 micrometers. The steel can also contain 0.4% to 1.5% by weight of manganese.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.