Daimler Chrysler Ag

Daimler Ag

Daimler-benz Ag

Patrick Izquierdo

Tilman Haug

Axel Heuberger

Harald Pfeffinger

Eyuep Akin Oezdeniz

Oliver Storz

Dezsoe Schilling

Jens Boehm

Tilmann Haug

Peter Stocker

Franz Rueckert

Karl-Ludwig Weisskopf

Herbert Gasthuber

Michael Lahres

Wolfgang Reichle

Wolfgang Pellkofer

Walter Zwink

Helmut Proefrock

Micheal Voit

Dieter Brackenhammer

Stefan Diessner

Herald Pfeffinger

Juergen Traber

Nazario Vocino

Martin Hartweg

Karl Holdik

Klaus Binder

Michael Scheydecker

Markus Beck

Peter Linden

Rainer Joos

Matthias Merkel

Tobias Hercke

Tanja Tschirge

Detlef Nowotni

Dirk Becker

Christian Russer

Marcus Brand

Karl-Heinz Kaiserauer

Christian Wanke

Michael Gruener

Albert Kaeppeler

Tobias Lux

Manuel Michel

Stefan Schweickert

Eyuep Akin ÖZdeniz

Albert Käppeler

A wire-form spray material, in particular for arc wire spraying, essentially comprising iron. The spray material is formed at least with carbon as a microalloy such that upon solidification of the spray material a fine pearlitic, bainitic, martensitic structure arises in which finely dispersed nitrides are present.

Wire-type spray material for a thermally sprayed layer having a pearlite, bainite, martensite structure

A wire-like spray material () based on an iron for electric arc wire spraying and also a functional layer () which can be produced therewith on a substrate (). The functional layer () has good corrosion resistance towards diesel fuel having a high sulphur content.

Wire-like spray material, functional layer which can be produced therewith and process for coating a substrate with a spray material

The invention relates to an inner burner () for electric arc wire spraying of hollow spaces, particularly cylinder bearing surfaces (), comprising two meltable electrodes which are supplied in two feed channels () to a discharge nozzle () of the inner burner (). The two electrodes are connected to two sliding contacts () for electrical energy transmission. According to the invention, the two sliding contacts () are displaceably mounted in the axial direction () and are each connected to a guide element () which is also displaceably mounted in the axial direction (). The respective guide element () is axially pretensioned via at least one associated spring () and thereby presses the sliding contact () against the electrode, wherein the feed channels (), the sliding contacts () and the guide elements () are arranged parallel to one another in the spraying head ().

Inner burner for electric arc wire spraying

The invention relates to a process for roughening metal surfaces to improve adhesion of layers which are thermally sprayed thereon, in that in a first process step recesses or depressions () are introduced into the surface in a material-detaching or material-removing treatment so that the protruding metal of the surface forms raised microstructures (), in particular projections, ridges, protuberances or bumps, these microstructures being reworked in at least a second process step by shaping and/or breaking so that a significant proportion of the structures form undercuts () in relation to the surface.

Surface conditioning for thermal spray layers

Piston pin for a connecting rod in a reciprocating internal combustion engine, wherein the piston pin carries at least in the area of the running surface a thermal sprayed slide layer of a metallic bearing material or slide bearing material, as well as reciprocating internal combustion engine with a connecting rod with small and with large connecting rod eye, wherein at least the running surface of one of the piston pins is formed of a thermal sprayed slide layer of a metallic bearing material, which exhibits a lower hardness than the running surface of the corresponding connecting rod eye and process for manufacturing a described piston pin with the steps of a extrusion molding or machining a piston pin preform, introduction of a recess in the area which will later become the running surface, roughening the outer surface in the area of the recess, application of a coating of a bearing material by a thermal spray process.

Piston pin with slide layer for connecting rod eye for internal combustion engines

In a process for chip-forming machining of thermally sprayed cylinder barrels of a cylinder crankcase, a cylinder crankcase is cast, those surfaces of the subsequent cylinder barrels which are to be thermally coated are roughened, the cylinder barrels are coated by a thermal spraying process, and the cylinder barrels are remachined to final dimensions. Machining of an insertion bevel and/or an end bevel and/or the cylinder head sealing surface and/or the crankshaft space and/or a cylinder bore is carried out in a chip-forming manner, and a respective chip-forming tool is guided so that the respective cutting edges penetrate into the material which is to be removed from the outside.

Process for the chip-forming machining of thermally sprayed cylinder barrels

In a process for processing cylinder crankcases having sprayed cylinder barrels, in which process a cylinder crankcase is cast, those surfaces of the subsequent cylinder barrels which are to be thermally coated are roughened, the cylinder barrels are coated by a thermal spraying process, and the cylinder barrels are remachined to final dimensions. After the thermal spraying process, coating material is at least partially removed from the crankshaft-side part of the cylinder crankcase.

Process for processing cylinder crankcases having sprayed cylinder barrels

A method for surface treatment of the interiors of hollow bodies, especially cylinder bores, in preparation for the application of a thermally sprayed layer. The method comprises dry cutting without a lubricant or with a shortage of lubricant using a tool having a defined and/or undefined surface profile. In this method with a portion of the material forming the interior is removed and produces a surface that has a defined structure and/or quality. This eliminates the need for costly degreasing of the surface following machining.

Method for surface treatment of the interiors of engine cylinder bores, and cylinders made by said method

The invention relates to a process for producing a surface layer with embedded inter-metallic phases, which is distinguished by the fact that a layer comprising a metal and a ceramic is applied to a substrate element, that a reaction takes place between the metal and the ceramic of the layer as a result of energy being introduced during the application of the layer or as a result of a subsequent introduction of energy, and as a result the surface layer is produced, with inter-metallic phases being formed.

Process for producing a surface layer

An inner torch for the electric-arc spraying of cavities, in particular of cylinder contact surfaces. The inner torch as at least two torch tubes for heating electrodes. The electrodes are provided for melting purposes and are designed as wires which can be burned away in an electric arc. The inner torch also has a gas feed for a process gas which is provided for transporting and spraying the molten wire material in the direction of the cavity surface which is to be coated. The wires are guided towards one another, by way of the torch tubes, wherein at the outlet and in the region of the electric arc, the electric arc of the electrodes wires, which is arranged in the contact region of the wires, is arranged in the region of the flow of the discharged process has, referred as the main gas arranged transversely to the main transporting direction of the wires. Furthermore, in addition to being bent towards one another, the wires are also bent transversely to this direction.

Inner torch

A method for surface working a tribological coating of a supereutectic aluminum-silicon alloy or an aluminum-silicon composite material with a coating structure includes machining the surface dry, without lubricant, in a one-step process, with a cutting tool having a cutting material containing diamond. The surface treating may be followed by a one-step finish honing or one-step texturing process.

Method for the surface treatment of a tribological coating

A material wire for producing wear-resistant and tribologically favorable surface coatings from a supereutectic Al/Si alloy by thermal spraying. The material wire is a filling wire that has a sheath made of metallic aluminum and a filling made of one or more additional alloy components.

Method for producing a surface coating on a substrate using a material wire

A tribological coating made of a copper-free highly hypereutectic aluminum/silicon alloy and/or of a copper-free aluminum/silicon composite material composed such that fine silicon primary crystals and/or silicon particles, intermetallic phases, and oxides form as hard particles during the production of the layers in the atmospheric thermal spraying method and/or are anchored in the structure. The surface of the coating can be machined economically by short-chipping using conventional tools, so that additional alloy elements such as copper for forming additional intermetallic phases such as Al,Cu can be eliminated. This is significant because conventional AlSi cylinder liners in reciprocating engines pose problems in conjunction with certain fuels because of their copper content.

Coating consisting of hypereutectic aluminum/silicon alloy and/or an aluminum/silicon composite material

A coating for a cylinder bore of a reciprocating engine with an iron, aluminum, or magnesium base comprises a hypereutectic aluminum/silicon alloy. The alloy is applied to a cylinder wall by thermal spraying.

Coating for a cylinder of a reciprocating engine

This invention provides a porous thermal barrier layer for protecting parts of an internal-combustion engine having parts which are acted upon by combustion, and particularly by heat, and to a process for applying such a thermal barrier layer to these parts. The thermal barrier layer, which is formed of grains and/or fibers connected with one another on the exterior side, and is produced at least partially from a heat-resistant, temperature-shock-stable and abrasion-proof barrier material, has a heat penetration number defined by the following formula

Internal-combustion engine and process for applying a thermal barrier

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Ulm, Germany

Patrick Izquierdo