Invention Grant
- Patent Title: Pair of guiding elements of which one is made of specific steel leading to improved anti-seizing performances
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Application No.: US11918871Application Date: 2006-04-21
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Publication No.: US09273386B2Publication Date: 2016-03-01
- Inventor: Eric Chaduiron , Laurent Houze , Shamba Jumaine
- Applicant: Eric Chaduiron , Laurent Houze , Shamba Jumaine
- Applicant Address: FR Andrezieux Boutheon
- Assignee: H.E.F.
- Current Assignee: H.E.F.
- Current Assignee Address: FR Andrezieux Boutheon
- Agency: Young & Thompson
- Priority: FR0504062 20050422
- International Application: PCT/FR2006/000886 WO 20060421
- International Announcement: WO2006/111661 WO 20061026
- Main IPC: C23C8/26
- IPC: C23C8/26 ; F16C17/00 ; C22C38/44 ; C22C38/04 ; C22C38/46 ; F16C9/02 ; F16C33/04 ; F16C33/14 ; F16C33/12

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.
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