Abstract:
A casting steel having high strength and low thermal expansion which has a chemical composition in mass %: C: 0.1 to 0.8 %, Si: 0.1 to 1.0 %, Mn: 0.1 to 1.0 %, S: 0.01 to 0.1 %, Ni: more than 40 % and not more than 50 %, Co: 4 % or less (including 0 %), Cr: more than 1.5 % and not more than 4 %, Al: 0.01 to 0.1 %, Mg: 0.001 to 0.1 % and balance: substantially Fe. The casting steel can be suitably used for a part having a ring shape which exhibits a low average thermal expansion coefficient in the temperature range of 20 to 500˚C, a high strength at 500˚C and good resistance to oxidation and thus can be used as a blade ring or a ring for retaining a seal ring for use in a gas turbine.
Abstract:
New and improved automobile and light truck components are disclosed. Specifically, certain components traditionnally made from steel, sometimes hardened steel, such as cylinder liners, various valve train components, clutch discs, brake rotors and brake caliper pistons can now be made from aluminum based materials, thereby saving considerable weight. An aluminum/aluminum nitride metal matrix composite material is provided on the contacting or wear surfaces to provide adequate abrasion resistance, yet protect the engaging component from being excessively worn. The metal matrix composite layer can be applied to an aluminum based metal matrix composite substrate or to an unreinforced aluminum substrate. The A1/A1N surface is also easier to machine than most metal matrix composite materials.
Abstract:
A bearing insert (14) for being cast into an aluminum alloy engine block (10) is made by a ferrous powder metal sintering process to make a skeleton structure which is permeable to the molten aluminum alloy in the block casting process. The insert (14) is made of a material having a similar composition as the bearing cap (16) so as to equalize machining and thermal expansion properties of the cap (16) and block (10) so as to provide improved roundness of the bearing (18) in the machining operations for forming the bearing support and in operation of the engine.
Abstract:
A thermal barrier coating for metal articles subjected to rapid thermal cycling includes a metallic bond coat deposited on the metal article, at least one MCrA1Y/ceramic layer deposited on the bond coat, and a ceramic top layer deposited on the MCrAlY/ceramic layer. The M in the MCrA1Y material is Fe, Ni, Co, or a mixture of Ni and Co. The ceramic in the MCrAlY/ceramic layer is mullite or Al2O3. The ceramic top layer includes a ceramic with a coefficient of thermal expansion less than about 5.4 x 10 DEG C and a thermal conductivity between about 1 J sec m DEG C and about 1.7 J sec m DEG C .
Abstract:
Eine Eisen-Aluminium-Legierung besteht aus etwa 40 Vol. -% bis etwa 70 Vol. -% Eisen-Phasen, aus etwa 3 Vol.-% bis etwa 60 Vol. -% intermetallischer Phasen und als Rest aus Aluminium-Phasen. Ferner ist bei einem Kolben für einen Verbrennungsmotor zumindest ein Bereich einer ersten Ringnut zumindest teilweise ausgespart und mit der Eisen-Aluminium-Legierung aufgefüllt. Die Legierung wird durch einen thermischen Spritzprozess auf einer Oberfläche mit einer Temperatur zwischen etwa 150 °C und etwa 400 °C hergestellt. Der Kolben wird so hergestellt, dass zumindest ein Bereich einer ersten Ringnut zumindest teilweise ausgespart wird und die Aussparung dann durch das Verfahren zur Herstellung der Eisen-Aluminium-Legierung aufgefüllt wird.
Abstract:
The present application relates to a method for the production of an engine component, in particular a piston for an internal combustion engine, in which an aluminum alloy is cast in a diecasting process. The aluminum alloy comprises the following alloy elements: silicon: 11 to 14.5 % by weight, nickel: 1.7 to 3.5 % by weight, copper: 3.7 to 5.2 % by weight, magnesium: 1.6 to 3.5 % by weight, iron: 0.6 to 1.5 % by weight, manganese: 0.2 to 0.4 % by weight, zirconium: 0.04 to 0.1 % by weight, vanadium: 0.04 to 0.1 % by weight, the aluminum alloy otherwise comprising aluminum and unavoidable contaminants.
Abstract:
A technique for using an iron plating for coating an aluminum product that results in adequate durability. An aluminum piston (lθ) used as a plated aluminum product is covered by an iron-based composite plating layer (l l). The iron-based composite plating layer (ll) contains a carbon nanomaterial, which is applied to the aluminum-based base material using a iron-based composite plating bath formed by mixing a carbon nanomaterial into an iron plating bath.
Abstract:
A main bearing cap (A') made of powder metal has a body portion (Y) made from one powder metal material (Q), and a bearing arch portion (H), foot joint face portions (S) and/or wings (W) made of a different powder metal material (P). The material (Q) of the body portion (Y) is harder than the material (P) of the other portions (H, S, W), and the material (P) of the other portions (H, S, W) is relatively machinable. For the bearing arch portion (H), the machinability of the material (P) approximately matches the machinability of the bearing support structure (B) to which the bearing cap (A') is assembled to produce a good quality bore and longer tool life during line boring. The bearing arch material (P) may be a bearing material.