Machine parts with wear-resistant surface brought into contact with elongated fibrous member
AssigneesKabushiki Kaisha Toshiba, Yano Kousakujo Corporation, Notoshiti Corporation
InventorsTakashi Ishii, Hajime Kohama, Hisao Yabe, Akira Yano, Shinsuke Noto
Life of this patent
Estimating the term…
Abstract
Machine parts to be brought into contact with an elongated fibrous member each consists of a substrate of an iron series metal and a surface layer which has high wear-resistance and a good sliding property, and which contains chromium oxide as a major constituent. The chromium oxide is converted from a chromium compound upon heating. An intermediate layer containing a reaction product between the chromium oxide in the surface layer and the substrate is formed at an interface between the surface layer and the substrate.
Claims11
Machine parts which are in contact with an elongated fibrous member, each part comprising a substrate of an iron series metal and a smooth, wear-resistant surface layer formed on a surface of said substrate, which substantially contains chromium oxide (Cr.sub.2 O.sub.3) as a constituent, the chromium oxide being converted from a chromium compound upon heating thereof, and an intermediate layer including a reaction product between the chromium oxide in said surface layer and said substrate being formed at an interface between said surface layer and said substrate.
Dependencies are inferred from the claim text.