Abstract:
The invention discloses a broaching oil or heavy duty cutting oil composition with excellent extreme pressure, cutting and cooling properties. It has a kinematic viscosity (10-20 cSt at 40°C) and minimum quantity of active sulfur (0.2%), both of which play a crucial role for cutting and cooling properties. The oil shows excellent metal cutting (tapping efficiency), load properties (weld load) and cooling efficiency. The proposed composition or its suitable dilution can be used for other cutting operations e.g., gun drilling, tapping, broaching etc.
Abstract:
A process for the in-situ formation of a lubricating phase comprising sulphur and tin in a friction material, wherein reaction of a sulphur source with a tin source in said friction material results in the formation of said lubricating phase, and wherein said reaction is initiated or effected by heat resulting, in use, from the generation of friction, wherein said sulphur source is selected from one or both of sulphur and/or a metal sulphide selected from one or more of iron, copper, zinc, titanium and bismuth, and wherein said tin source is selected from one or more of tin, a tin-containing compound and/or a tin-containing alloy.
Abstract:
Non-staining, active metal-working compositions are disclosed. The compositions contain active sulfur to provide extreme pressure properties for metal-working fluids. A metal corrosion inhibitor is disclosed that reduces the corrosivity of free sulfur on non-ferrous metallic objects.
Abstract:
A sulfurized extreme-pressure additive which contains no surfactants, is perfectly soluble in water, is reduced in odor, and has a satisfactory hue; and a cutting fluid and a grinding fluid which are excellent in antifoaming and anticorrosive properties and have high load-bearing performance and lubricating performance comparable to those of conventional cutting and grinding oils. The extreme-pressure additive comprises a salt of a condensate of a sulfurized unsaturated hydroxyfatty acid, the condensate having a sulfur content of 8 to 15 wt.%, a hue of 6 or less, and an acid value of 80 to 200. The grinding fluid comprises this extreme-pressure additive and water.
Abstract:
Verfahren zum Herstellen einer Pleuelstange, die eine Aufnahme für eine Kurbelwelle sowie eine Bohrung zur Verbindung mit einem Kolben aufweist, mit den Schritten: Bereitstellen eines Pleuelstangenrohlings aus einem Metallmaterial, wobei der Pleuelstangenrohling eine Kolbenbolzenbohrung zur Durchführung eines Kolbenbolzens aufweist, der mit einem Kolben verbindbar ist; und Bearbeiten einer Oberfläche der Kolbenbolzenbohrungzur Verbesserung der tribologischen Eigenschaften, wobei der Bearbeitungsschritt beinhaltet, ein Werkzeuggegen eine Oberfläche der Kolbenbolzenbohrungmechanisch zu reiben, wobei währenddessen eine Prozessflüssigkeit in einem Kontaktbereich zwischen der Kolbenbolzenbohrung und dem Werkzeugzugeführt wird, wobei die Prozessflüssigkeit ein Chalkogenelement aufweist, wobei das mechanische Reiben mit einem Kontaktdruck im Bereich zwischen 1% und 100% der finalen Festigkeit der Pleuelstange durchgeführt wird, wobei die Prozessflüssigkeit ferner ein Refraktärmetallelement beinhaltet, wobei der mechanische Reibschritt ein Polieren der Oberfläche der Kolbenbolzenbohrung sowie die Abscheidung eines Reibfilms bewirkt, der das Chalkogenelement, das Refraktärmetallelement und Material aus der Pleuelstange beinhaltet, und zwar auf der Oberfläche der Kolbenbolzenbohrung.
Abstract:
The invention discloses a broaching oil or heavy duty cutting oil composition with excellent extreme pressure, cutting and cooling properties. It has a kinematic viscosity (10-20 cSt at 40°C) and minimum quantity of active sulfur (0.2%), both of which play a crucial role for cutting and cooling properties. The oil shows excellent metal cutting (tapping efficiency), load properties (weld load) and cooling efficiency. The proposed composition or its suitable dilution can be used for other cutting operations e.g., gun drilling, tapping, broaching etc.
Abstract:
A lubricating oil composition for high-speed gears, particularly those having a peripheral speed of at least 10 m/sec, prepared by compounding a lube base oil having a percentage CA of 5 or less and desirably a nitrogen content of 50 ppm or less and a sulfur content of 50 ppm or less with additives based on, respectively, sulfur, phosphorus and nitrogen in such amounts that the element ratio, 100 N/(S+P), in the composition ranges from 4 to 10 by weight. The composition serves to develop satisfactory hypoid gear performance, is reduced in sludge formation, and can lengthen the service life of oil seal used in the high-speed and high-temperature rotating parts.
Abstract:
A manufacturing method for providing a low-friction surface comprises providing (210) of a mechanical element. A tool is mechanically rubbed (212) against a surface of the mechanical element. A process liquid is provided (214) to a contact area between the mechanical element and the tool. The process liquid comprises a first element that is a refractory metal and a second element that is a chalcogen. The first and second elements are provided in a liquid substance. The mechanical rubbing is performed with a contact pressure that is between 1% and 100% of an ultimate strength of the mechanical element. The mechanical rubbing thereby causes a combined burnishing of the surface of the mechanical element and a deposition of a tribofilm on the surface of the mechanical element. The tribofilm comprises the first element and the second element.