Abstract:
Nickel-based welding alloy also contains (preferred wt%): chromium 7.5 - 11; cobalt 8.0 -11.4; tungsten 2.8 - 6.9; melting point lowering agent 3 - 19.4; and at least one component chosen from scandium, zirconium, aluminum, titanium and tantalum. An independent claim is included for a method for repairing components (1) using the alloy (10) which is carried out at a uniform temperature or using a temperature gradient.
Abstract:
Die Erfindung betrifft eine Lotlegierung gemäß Anspruch 1 und ein Verfahren zur Reparatur eines Bauteils gemäß Anspruch 43. Lotverfahren mit den verwendeten Loten haben oft den Nachteil, dass das Lot schlechte Hochtemperatureigenschaften aufweist. Die erfindungsgemäße Lotlegierung ist nickelbasiert und weist die Bestandteile Chrom, Kobalt, Wolfram auf sowie 0,5% bis 22,4wt% eines der Elemente aus der Gruppe Scandium, Aluminium, Titan, Zirkon oder Tantal und wird bei dem erfindungsgemäßen Verfahren zur Reparatur eines Bauteils verwendet.
Abstract:
Die Erfindung betrifft eine Lotlegierung gemäß Anspruch 1 und ein Verfahren zur Reparatur eines Bauteils gemäß Anspruch 43. Lotverfahren mit den verwendeten Loten haben oft den Nachteil, dass das Lot schlechte Hochtemperatureigenschaften aufweist. Die erfindungsgemäße Lotlegierung ist nickelbasiert und weist die Bestandteile Chrom, Kobalt, Wolfram auf sowie 0,5% bis 22,4wt% eines der Elemente aus der Gruppe Scandium, Aluminium, Titan, Zirkon oder Tantal und wird bei dem erfindungsgemäßen Verfahren zur Reparatur eines Bauteils verwendet.
Abstract:
A refrigerant compressor includes a first layer (24) composed of a single layer of chromium, a second layer (25) composed of an alloy layer of chromium and tungsten carbide, a third layer (26) composed of an amorphous carbon layer containing at least one of tungsten and tungsten carbide, and a fourth layer (27) composed of an amorphous carbon layer containing carbon and hydrogen without metals, which are sequentially formed on a surface of a sliding member (13b) of a compression mechanism formed of tool steel. The second layer (25) is formed to have a chromium content higher on a side of the first layer (24) than a side of the third layer (26), and have a tungsten carbide content higher on the side of the third layer (26) than the side of the first layer (24)- In addition, the third layer (26) is formed to have a tungsten content or a tungsten carbide content higher on a side of the second layer (25) than a side of the fourth layer (27).
Abstract:
A variable displacement compressor optionally varies displacement based upon pressure in a crank chamber for adjusting the pressure in the crank chamber by varying an opening degree of a passage that interconnects the crank chamber and one of relatively high and low pressure regions of the refrigeration cycle. A control valve of the variable displacement compressor has a valve seat and a valve. The valve seat has a seat surface for adjusting the opening degree of the passage. The valve has a valve surface for adjusting the opening degree of the passage. At least one of the seat surface and the valve surface is made of a material with relatively high hardness.
Abstract:
A surface of aluminium alloy or iron alloy coated, on at least a part, with a lead-free copper-based coating layer comprising, by weight, 0.2-15% bismuth, and at least one metal selected from the group consisting of 5-40% nickel, 1-20% chromium, 1-20% iron, and 1-10% cobalt, the balance being copper which is more than 55%. The surface may be of a swashplate used in swashplate type compressors.
Abstract:
A piston (1) for an internal combustion engine has a piston-ring groove (2) which is strengthened with a composite layer (3) based on porous metal which is embedded around the piston-ring groove (2). The porous metal contains at least 10% Cr, and the volumetric ratio of the porous metal is between 8 to 70%, so that even when the engine is operated under high heat loads, no crack will be initiated in the piston (1).
Abstract:
A rotary compressor includes: a compressing unit that includes an annular cylinder, an end plate which has a bearing unit and a discharge valve unit and closes an end portion of the cylinder, an annular piston which is fit in an eccentric portion of a rotation shaft supported in the bearing unit, performs an orbital motion inside the cylinder along a cylinder inner wall of the cylinder, and forms an operation chamber together with the cylinder inner wall, and a vane which protrudes from the inside of a vane groove of the cylinder to the inside of the operation chamber, comes into contact with the annular piston, and partitions the operation chamber into an inlet chamber and a compression chamber. The vane is formed of steel and has a diamond-like carbon layer formed on a sliding surface with respect to the annular piston. The annular piston is formed of Ni-Cr-Mo cast iron to which 0.15 wt% to 0.45 wt% of phosphorus is added, or is formed of cast iron or steel and has an iron nitride layer formed on an outer circumferential surface thereof.