摘要:
A sliding component for an internal combustion engine may include a ferrous base having a peripheral sliding surface covered with a protective layer including at least one of a nitride applied via physical vapor deposition and a nitrided layer. The base may include a coating of carbon of a diamond-like carbon type. The coating may include at least one of (i) a transition layer including a composition of WC1-X and (ii) a layer of metallic chromium of crystalline structure disposed between the ferrous base and an outer layer of amorphous carbon. The coating may also include an intermediate layer of a nanocrystalline phase of carbides in a multilayer structure having a first sub-layer including a composition different than a second sub-layer disposed under the outer layer.
摘要:
The present invention refers to a piston ring for internal combustion engine, having an outer surface of a coating of Chromium Nitride (CrN and Cr2N) and Niobium Nitride (NbN and Nb4N3), capable of offering greater resistance to peeling of the coating, also maintaining an excellent level of resistance to wear and tear and scratches to the layer of Chromium Nitride deposited.
摘要:
An element with at least one slide surface with a coating for use on an internal combustion engine may include a base of a metallic alloy and at least one inner surface provided with a hard ceramic coating generated by physical vapor deposition. The element may include a porosity with a rate lower than 2 percent by volume, a Vickers hardness ranging from 1500 to 3000HV, and a compressive inner tension lower than 500 MPa.
摘要:
A slide component, used in internal combustion engines, provided with a metal-based substrate material and a protective liner (R), with the slide component having at least two main elements, the first one composed by an element with high resistance to corrosion, and the second element providing increase of the resistance to wear and/or presenting lower friction than the substrate material, both of them covering at least one of the surfaces of the slide component.
摘要:
A bearing shell segment for internal combustion engines, composed of a body defining an inner surface that receives a coating and makes contact with a layer of lubricant oil film and an opposite outer surface, associable to a bearing, an inner surface having at least a first area substantially free from the compression load coming from the movement of the piston by the explosion of air-fuel mixture, and a second area which receives compression load coming from the movement of the piston by the explosion of air-fuel mixture. The first area has at least a surface portion to capture foreign particles present in the layer of lubricant oil film, the surface portion having cavities positioned so as to enable at least one foreign particle to be captured and withheld while moving towards the flow of lubricant oil, before reaching the second area.
摘要:
This invention refers to a piston ring, particularly planned for use in internal combustion engines or compressors, including at least one metallic base (2) to which it is applied, by the physical vapor deposition (PVD) process, a multilayer coating (3) including a periodicity (P), formed by at least one first layer (5) and at least one second layer (5′), being the layers adjacent, bringing one first layer (5) predominantly formed by metallic chromium (5) and one second layer predominantly formed by ceramic chromium (5′).
摘要:
It is described a slide bearing, particularly to constrain at least one shaft of an internal combustion engine, having a support structure or substrate (2) to which a lining (3) is applied by a Cold Spray or Cold Gas Dynamic Spray process, the lining being comprised of at least one composite material comprising at least one alloy powder with ceramic particles and anti-seizure material.
摘要:
A method of manufacturing a strip for a bearing may comprise roll-bonding a bearing layer comprising a tin-free aluminium alloy directly to a base layer to form a bimetal and heat-treating the bimetal at a temperature below a recrystallization initiation temperature of the aluminium alloy. A strip for a bearing manufactured using the method, and a bearing having a strip manufactured using the method, are also provided.
摘要:
A sliding element for an internal combustion engine may include a base material having an annular external surface. The external surface may include a bonding layer, a first layer of coating, and a second layer of coating sequentially disposed thereon. The first layer of coating and the second layer of coating may include hard amorphous carbon (DLC) of a combined matrix having a plurality of sp3/sp2 bonds. The first layer of coating may include 45% sp3 bonds or less and may have a thickness of at least 10 micrometers. The second layer of coating may include at least 55% sp3 bonds and may have a thickness of at least 3 micrometers.
摘要:
A piston ring for internal combustion engines provided with a ferrous alloy base includes an annular outer surface on which a coating including at least one outer layer is applied deposited on an adhesive layer, the outer layer being provided with a variable thickness, in such a way that the thickness of the outer layer gradually increases from 90° and 270° towards 0° and 360° respectively, with the thickness attaining its maximum value in the region of 10° and 350° and slightly decreasing towards 0° and 360° so as to ensure an optimal working condition, minimizing the contact pressure and consequently the accelerated wear in the vicinities of the ends of the ring, in addition to preventing and/or impeding the detachment of the outer layer of the coating.