Abstract:
Die vorliegende Erfindung betrifft einen legierten perlitisch-ferritischen Stahl mit der folgenden Zusammensetzung, angegeben jeweils in Gew.-%: Kohlenstoff : 0,35 - 0,50; Silizium: 0,15 - 0,80; Mangan: 1,20 - 2,00; Phosphor: 0,00 - 0,0025; Stickstoff : 0, 010 - 0,035; Chrom: 0,00 - 0,50; Molybdän: 0,00 - 0,050; Nickel: 0,00 - 0,15; Kupfer: 0,00 - 0,40; Vanadium: 0,13 - 0,40; Titan: 0,001 - 0,004; Aluminium: 0,00 - 0,04; Niob: 0,00 - 0,05; wobei mindestens zwei der Elemente Vanadium, Aluminium und Niob enthalten sind. Der Stahl findet Verwendung für ein Bauteil für Verbrennungsmotoren, insbesondere für Kolben oder Kolbenteile.
Abstract:
Die Erfindung betrifft einen mehrteiliger Kolben mit wenigstens einem Oberteil und einem Unterteil mit einem Kolbenhemd, das eine Umfangslauffläche bildet, wobei das Oberteil zumindest einen Teil eines Kolbenbodens des Kolbens bildet und wobei das Unterteil aus einem ersten Material und das Oberteil aus einem zweiten Material besteht. Erfindungsgemäß ist vorgesehen, dass das Oberteil 42 mittels wenigstens eines Hinterschnitts am Unterteil und/oder Oberteil formschlüssig mit dem Unterteil 58 verbunden ist.
Abstract:
The invention relates to cylinder for piston engines and to a process for its production. The cylinder bore is characterized by its surface being aluminum-oxide ceramic of 3.85 - 3.95 g/cm density, containing 0.2 - 3.0 mass% calcium- and/or magnesium-fluoride, or titanium-dioxide. The oxide ceramic coated cylinder bore is produced by placing a cylindrical body sintered between 1450 and 1750 DEG C into the cylinder of the internal combustion engine, where it is fixed with shrink joint.
Abstract translation:本发明涉及用于活塞发动机的气缸及其生产方法。 气缸孔的特征在于其表面为3.85〜3.95g / cm 3密度的氧化铝陶瓷,含有0.2-3.0质量%的钙和/或氟化镁或二氧化钛。 氧化物陶瓷涂覆的气缸孔通过将在1450和1750℃之间烧结的圆柱体放置在内燃机的气缸中,在其中用收缩接头固定。
Abstract:
A rotary internal combustion engine with a rotor body made at least in major part of a first material, with at least the contact surface of the rotor lands including a second material having a greater wear resistance than that of the first material with respect to frictional engagement with the portion of the inner surface of the internal cavity contacting the at least one land. For at least one of the end faces, the land(s) include(s) the first material and the contact surface is defined by a surface layer of the second material on the first material. A method of axially positioning a rotor of a rotary engine within an internal cavity of an outer body of the engine are also discussed.
Abstract:
A method for manufacturing a lightweight piston pin includes preparing a mixture of a base metal powder comprising chromium, carbon and iron, a TiC powder and a binder, metal powder injection molding (MIM) the mixture into a piston pin shape, degreasing the molded body to remove the binder from the mixture, sintering the binder-deprived, molded body, forming an intermediate layer composed of chromium carbide that surrounds the TiC powder in the sintered body, and transforming a matrix structure of the sintered body into a martensitic structure.
Abstract:
A lubricating layer having wear resistance and reliability on the wear resistance, and a compressor including a lubricating layer are provided. The compressor may include a lubricating layer coated on a frictional portion between a rotational shaft and a bearing. The lubricating layer may include at least one metal phase selected from a group consisting of Titanium (Ti); and Copper (Cu), Cobalt (Co), Nickel (Ni), and Zirconium (Zr), and may be a composite structure of amorphous and nanocrystalline materials.
Abstract:
The present invention relates to the use of corrosion resistant alloys in fluid ends to prolong the life of a well service pump. One embodiment of the present invention provides a method of providing a fluid end that has a corrosion resistant alloy having a fatigue limit greater than or equal to the tensile stress on the fluid end at maximum working pressure in the fluid end for an aqueous-based fluid; installing the fluid end in a well service pump; and pumping the aqueous-based fluid through the fluid end.
Abstract:
A turbine blade having a leading edge portion and a flowing-off edge portion is formed using the following steps: providing a centrifugal casting device having a rotor and at least one crucible being accommodated in the rotor; providing a mold having an extended cavity for forming the turbine blade; arranging the mold so that an inlet opening of the mold is arranged with an outlet opening of the crucible, and further arranging the mold so that a mold leading edge is directed in a direction against the rotational direction of the rotor; forcing a metal melt by means of centrifugal forces from the crucible into the mold; exerting a pressure on the melt being forced into the mold until the temperature of the solidifying melt has reached a predetermined cooling-temperature; and relieving the pressure when the temperature of the solidifying melt is below the predetermined cooling-temperature.
Abstract:
A Titanium-Tantalum base shape memory alloy is provided which possesses high machinability and is suitable for repeated high temperature operation. The Titanium-Tantalum base shape memory alloy consists of 15 mol %-40 mol % Tantalum, additive elements, and the balance Titanium and impurities.