Slide surface construction formed of aggregate of fe...

Details Slide surface construction formed of aggregate of fe... Slide surface construction formed of aggregate of fe...

C - Chemistry, Metallurgy

25

D

C25D 3/20 (2006.01) C25D 7/00 (2006.01) F02F 3/10 (2006.01) F02F 7/00 (2006.01) F16J 1/01 (2006.01)

Patent

CA 2110758

A slide surface construction is formed of an aggregate of Fe crystals having a body-centered cubic structure. The aggregate includes at least one of two types of metal crystals: selected from the group consisting of (1) (h00) oriented metal crystals with their (h00) planes (by Miller indices) oriented toward a slide surface and having a content S in a range represented by S < 25%, and (2) (3hh0) oriented metal crystals with their (3hh0) planes (by Miller indices) oriented toward the slide surface and having a content S in a range represented by S < 25%. If both the types of the oriented Fe crystals are present, a large number of trigonal pyramid-shaped Fe crystals are precipitated in the slide surface, thereby providing improved oil retention and initial conformability. Thus, the slide surface construction exhibits an excellent seizure resistance.

Cette invention concerne la structure d'une surface de glissement formée d'un agrégat de cristaux de Fe à structure cubique centrée. L'agrégat comprend au moins un de deux types de cristaux métalliques choisis parmi le groupe (1) des cristaux métalliques à orientation (h00) dont les plans (h00) (selon les indices de Miller) sont orientés vers la surface du palier lisse et à teneur en S inférieure à 25 % et (2) des cristaux métalliques à orientation (3HH0) dont les plans (3hh0) (selon les indices de Miller) sont orientés vers la surface du palier lisse et à teneur en S inférieure à 25 %. Lorsque les deux types de cristaux de Fe orientés sont présents dans la structure métallographique objet de l'invention, on assiste à la précipitation dans la surface de glissement d'un nombre élevé de cristaux de Fe rhomboédriques de forme pyramidale, ce qui entraîne une amélioration de la capacité de rétention d'huile et de la conformabilité initiale. Ces qualités confèrent à la surface de glissement une excellente résistance au grippage.

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