摘要:
Die Erfindung betrifft ein Mehrschichtgleitlagerelement umfassend eine Stützschicht und eine Gleitschicht, wobei die Gleitschicht aus einem Weißmetall umfassend die Elemente Zinn, Zink und Kupfer besteht, wobei der Anteil an Kupfer zumindest 0,5 Gew.-% und der Anteil an Zink zwischen 35 Gew.-% und 50 Gew.-% beträgt und den Rest Zinn bildet.
摘要:
Die Erfindung betrifft ein Mehrschichtgleitlager (1) umfassend eine Stützschicht (2) und eine Gleitschicht (3), wobei die Gleitschicht (3) aus einer Kupferbasislegierung mit Kupfer als Hauptbestandteil, das zumindest teilweise eine Kupferphase bildet, besteht, die neben Kupfer zumindest ein Element aus einer ersten Elementgruppe bestehend aus Zinn, Germanium und Silizium in einem Summenanteil von 1 At.-% bis 5 At-%, zumindest ein Element aus einer zweiten Elementgruppe bestehend aus Zink, Antimon, Indium, Aluminium und Gallium in einem Summenanteil von 2 At-% bis 8 At-%, sowie Blei und Bismut enthält, wobei der Anteil an Blei zwischen 2 Masse-% bis 8 Masse-% beträgt, und der Rest durch Kupfer gebildet ist Das Massenverhältnis von Bismut zu Blei beträgt zwischen 1:10 und 1:800 wobei der Mindestanteil an Bismut 0,01 Masse~% beträgt
摘要:
A presente invenção refere-se auma bronzina (1) para motores de combustão interna, geralmente a bronzinas empregadas em bielas e blocos de motores de combustão interna. A bronzina da presente invenção compreende: uma camada de suporte de aço (2); uma camada revestimento (3) compreendendo uma liga Cu e sendo disposta sobre a camada de suporte de aço (2); uma camada de barreira antidifusão (4) ô base de Ni disposta sobre a camada de revestimento (3); e uma camada antifricção (5) compreendendo uma matriz de Sn-Zn e precipitados de Zn, sendo a dita camada antifricção (5) disposta sobre a camada de barreira antidifusão (4).
摘要:
The present invention relates to a sliding element for use in internal combustion engines, provided with a ferrous base (10) covered by a protective surface layer (11 ) comprising at least one nitride applied by physical vapour deposition process (PVD) or a nitrided layer, to which peripheral sliding sur-face a diamond like carbon (DLC) coating (12) is applied, wherein: (i) the coating (12) comprises at least one transition layer (122) comprising WC1-X and a layer (121) of metallic chromium with crystaline structure (BCC - body cubic center) positioned between the ferrous base (10) and an outer amorphous carbon layer (124), and a nanocrystalline phase of carbides, in a multilayer structure of (a-C:H:W) and (a-C:H) in the form of an intermediate layer (123); and (ii) the ratio between the thickness of the outer amorphous carbon layer (124) and the layer (123) composed of a nanocrystalline carbide structure is greater than 4 and/or the thickness ratio of the total layer by the thickness of the outer layer (a-C:H) (124) is greater than 1, preferably between 1 and 1.4.
摘要:
A sliding bearing for an internal combustion engine having a plastics polymer-based composite layer on a substrate, the composite layer comprising: a matrix of plastics polymer- based material having distributed throughout the matrix; 0.1 to 5 %vol carbon nanostructures; and incidental impurities; and a method of manufacture of such a sliding bearing.
摘要:
The present invention is applied to a tribological pair comprising two metal pieces (10, 20), a first of them having a movable contact surface (10a) which provides friction in relation to a respective contact surface (20a) of a second of said metal pieces (20). According to the present invention, the first metal piece (10) has its contact surface (10a) defined by a coating formed: by a first surface layer (11) in a material harder than that of the first metal piece (10); and by a second surface layer (12), disposed onto the first surface layer (11) and in a material defining a coating which reduces the chemical affinity in relation to the contact surface (20a) of the second metal piece (20) of the tribological pair, in order to provide, to said tribological pair, a lower friction coefficient in relation to the tribological pair deprived of said coating.
摘要:
The wear resistance of a bi-directional tapered roller bearing is improved by applying a tribological coating (C) to both the small and large end faces (20a,b) of the roller (20) and to at least one of the rib faces (24a, 26a and 28a) of the bearing assembly (10).
摘要:
This invention relates to a thrust washer (1) for internal combustion engines, provided with a metal base comprising a contact surface (2) associated with the engine block, and a slip surface (3), the slip surface (3) having a surface profile incorporating at least one ramp section (4), at least one flat horizontal section (5) and at least one oil channel (6), the ramp section (4) and the flat horizontal section (5) being connected by means of an asymptotic curve, the ramp section (4) tending asymptotically towards the flat horizontal section (5), eliminating points of inflection or vertices, giving rise to uniform hydrodynamic support, cancelling out transition effects, which results in a thrust washer (1) having a high resistance to wear and excellent performance.