H.e.f.

Hydromecanique Et Frottement

Mahle International Gmbh

Psa Automobiles Sa

Fabrice Prost

Pierrick Pavallier

Christophe Heau

Sébastien Bucher

Constantin Iacob

Sebastien Bucher

Roland Lochmann

Marco Maurizi

Sandrine Henry

Stéphan Grandjean

Mohamadou Bocar Diew

Romain Montelimard

Yves René Alexis Gachon

Laurent Bombillon

Stephan Grandjean

Yves Rene Gachon

Moussa Diaby

Pierrick Pavailler

A guide device includes: a metal component in the form of a bush provided with a friction surface intended to receive a mating part in frictional contact by sliding with oscillation; a wear sensing system of the friction surface having one or more sensors; and a wireless communication system connected to the detection system and configured to transmit information relating to the wear of the friction surface out of the guide device. The sensor or sensors are arranged exclusively on one longitudinal side or on two longitudinal sides of the bush, each longitudinal side being defined over at most two fifths of the length of the annular bush.

Guide device and mechanical system comprising such a device

A hinged component with one degree of freedom includes at least two concentric rings, movable in rotation in relation to one another around a central axis, defining a friction interface therebetween and including: an outer ring having an inner friction surface and an inner ring having an outer friction surface and an inner friction surface intended to receive a movable member guided by the component in rotation, oscillation and/or translation.

Hinged component and mechanical system comprising such a component

A member for guiding an element mobile in oscillation or rotation is presented. The member has a body made of a hardened metallic material, provided with a bore for assembling the mobile element, having cavities that are distributed discontinuously in the bore and capable of acting as grease reserves, and having optional grease supply. In the bore are defined a bearing surface outside of the cavities and the grease supply, and a non-bearing surface in the cavities and the grease supply. The bore includes at least one zone with: cavities having a depth of between 2 and 5 mm, and a quantity of grease in the cavities per bearing surface of between 0.05 and 0.3 g/cm. A mechanical system having such a member and a method for manufacturing such a member is also contemplated.

Member for guiding a mobile element in oscillation or rotation

A guiding member, having a body provided with a bore for mounting a mobile element is presented. The body consists of a metallic material. The bore has a surface layer treated against jamming over a diffusion depth of less than or equal to 0.6 mm. The surface layer has a hardness of greater than or equal to 500 Hv1 over a depth of between 5 and 50 μm.

Guiding member, mechanical system comprising such a guiding member, and method for producing such a guiding member

Hinged component, and mechanical system comprising such a component

Disclosed is a part including a metal substrate, a non-hydrogenated amorphous ta-C or aC carbon coating that coats the substrate, and an undercoat which is based on chromium (Cr), carbon (C) and silicon (Si) and is disposed between the metal substrate and the amorphous carbon coating and to which the amorphous carbon coating is applied, characterized in that the undercoat included, at its interface with the amorphous carbon coating, a ratio of silicon in atomic percent to chromium in atomic percent (Si/Cr) of 0.35 to 0.60, and a ratio of carbon in atomic percent to silicon in atomic percent (C/Si) of 2.5 to 3.5.

Part coated with a hydrogenated amorphous carbon coating on an undercoat comprising chromium, carbon and silicon

Disclosed is a part comprising a metal substrate, a non-hydrogenated amorphous ta-C or aC carbon coating that coats the substrate, and an undercoat which is based on chromium (Cr), carbon (C) and silicon (Si) and is disposed between the metal substrate and the amorphous carbon coating and to which the amorphous carbon coating is applied, characterized in that the undercoat included, at its interface with the amorphous carbon coating, a ratio of silicon in atomic percent to chromium in atomic percent (Si/Cr) of 0.3 to 0.60, and a ratio of carbon in atomic percent to silicon in atomic percent (C/Si) of 2.5 to 3.5.

Part coated with a non-hydrogenated amorphous carbon coating on an undercoat comprising chromium, carbon and silicon

The present invention relates to a mechanical system (), comprising a bearing () and a shaft () coupled to the bearing (), especially for an internal combustion engine, being subjected to average contact pressures of less than 200 MPa. The shaft () has at least one area () provided with an anti-seizing surface coating (), having a surface hardness at least twice that of the bearing (), and a microtexturation () comprised of a set of individual microcavities (), distributed in said area (). The invention also relates to a method for manufacturing such a mechanical system ().

Mechanical system comprising a shaft coupled to a bearing, and method for manufacturing such a system

Some embodiments are directed to a multimaterial powder used in the field of metallurgy and plasturgy. The multimaterial powder includes support particles having a median particle size distribution between 1 &#x3bc;m and 100 &#x3bc;m and functionalising particles having a median particle size distribution that is a factor of 10 to 1000 lower relative to the support particles. The powder is characterised in that the support particles and the functionalising particles form composite grains having a core-shell structure that each have a core formed by a support particle, and a shell, that covers between 10 and 100% of the surface of the support particle and which is formed by at least one surface layer of the functionalising particles.

Multimaterial powder with composite grains for additive synthesis

Various implementations include a combustion engine piston, including a skirt in a counter-part and including a first contact area of the piston in the counter-part, a head which extends transverse to a central axis, and a ring carrier which comprises at least two lands and at least two grooves for receiving the rings, including a first land adjoining the head and a second land situated between the first land and the skirt, wherein the lands include at least one contact land having a diameter greater than a minimum diameter of the skirt to form a second contact area of the piston in the counter-part, and wherein at least one contact land comprises a friction-reducing surface coating, formed at least on a radial sector covering an angle of at least 30 degrees, and up to on a single sector covering an angle of 360 degrees.

Piston for a heat engine, heat engine comprising such a piston, and methods

Some embodiments are directed to the manufacture of functional composites (electrical conductors, thermal conductors, etc.) produced from coated powders.

Conductive composite produced from coated powders

In a method of treating a nitrided/nitrocarburized workpiece, at least a portion of the workpiece is subjected to a first step in which at least one laser beam is moved in at least one pass over the portion, until the surface layer of the portion is transformed in part or in full, and until the distribution of the nitrogen concentration in the diffusion zone is modified. In a second step at least one laser beam is moved in at least one pass over said portion so as to enable the nitrogen concentration in the underlying diffusion layer to be reduced.

Method for treatng a nitrided/nitrocarburised part

Some embodiments relate to a powder paint thermosetting binder composition that is solvent-free and includes at least one hardener and one cross-linking catalyst, and a first epoxy resin or a functionalized resin having at least one epoxy group. The resin has an epoxy equivalent weight of between 250 and 800 g/eq and a glass transition temperature of between 35 and 80&#xb0; C. A binder composition of this kind has a polymerization starting temperature of 80&#xb0; C. and a gel time of between 35 s and 140 s at 180&#xb0; C. Some embodiments also relate to a paint composition containing a thermosetting binder composition of this kind, at least one pigment and, optionally, in addition a leveling agent and inorganic or organic fillers.

Powder paint thermosetting binder composition and manufacturing method

The piston pin has an anti-seize coating limited to an angular sector corresponding at least to a friction area submitted to a contact pressure along a preferential direction.

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Saint Etienne, France

Fabrice Prost