摘要:
A process is disclosed for applying a heat shielding coating system on a metallic substrate. The coating system comprises at least three individual layers selected from the group of barrier layer, hot gas corrosion protection layer, protection layer, heat barrier layer, and smoothing layer. The coating system is applied to the metallic substrate by low pressure plasma spraying in a single operation cycle. This process enables the layers to be applied in an arbitrary sequence. The process is preferably used in applying a coating system to a turbine blade, particularly a stator or a rotor blade of a stationary gas turbine or of an aircraft engine, or to another component in a stationary or aircraft turbine that is subjected to hot gas.
摘要:
Spray material for thermally coating a substrate, a thermal spray layer, and a cylinder for a reciprocating piston combustion engine coated with the thermal spray layer. The spray material includes a solid lubricant of ZnO. A volume fraction of ZnO in the spray material lies in a range from 0.1% to 15% of the volume of the spray material.
摘要:
The invention relates to a spray powder for coating a substrate (2), in particular for coating a bearing part (2) of a bearing apparatus, the spray powder having at least the following composition: zinc=5% to 30% by weight, tin=1% to 10% by weight, silicon=0.1% to 3% by weight, aluminum=0.1% to 7% by weight, iron=0.01% to 2% by weight, manganese=0.01% to 4% by weight, cobalt=0.01 to 3% by weight, copper=the balance to 100% in % by weight.
摘要:
The invention relates to a plasma spraying device (1) for spraying a coating (2) onto a substrate (3) by a thermal spray process. Said plasma spraying device (1) includes a plasma torch (4) for heating up a plasma gas (5) in a heating zone (6), wherein the plasma torch (4) includes a nozzle body (7) for forming a plasma gas stream (8), and said plasma torch (4) has an aperture (9) running along a central longitudinal axis (10) through said nozzle body (7). The aperture (9) has an convergent section (11) with an inlet (12) for the plasma gas (5), a throat section (13) including a minimum cross-sectional area of the aperture, and a divergent section (14) with an outlet (15) for the plasma gas stream (8), wherein an introducing duct (16) is provided for introducing a liquid precursor (17) into the plasma gas stream (8). According to the invention a penetration means (18, 161, 181, 182) is provided to penetrate the liquid precursor (17) inside the plasma gas stream (8). The invention relates also to a method for introducing a liquid precursor (17) into a plasma gas stream (8) as well as to the use of a plasma spraying device (1) and a method in accordance with the present invention for coating a surface of a substrate (3).
摘要:
A surface layer for forming a cylinder barrel wall of a combustion engine block is proposed. The surface layer has separate phases of components that are separated from the phase of the remaining materials. The surface layer is produced by plasma spraying an iron containing spraying powder, incorporating all components of the layer to be produced. Such a surface layer may be applied easily and shows a significantly improved behavior regarding the machining thereof, without negatively influencing other important characteristics of the layer material, like wear resistance and coefficient of friction vis-à-vis the material of the piston rings. Preferred components of the spraying powder are, besides Fe, Cr, MN, S and C. Moreover, the spraying powder can contain As, Te, Se, Sb and/or Bi.
摘要:
Ferrous coatings of the cylinder working surfaces of combustion engine blocks have a content of bound oxygen in the amount of between 1 to 4% by weight. They are characterized by extraordinary properties as far as tribology and the possibility of processing, e.g. machining, are concerned. Particularly, the coefficient of friction and the tendency to scuffing are substantially reduced. Such coatings can be realized, for example, by adding an amount of 200 to 1000 normalized liters air per minute during the plasma spraying operation.
摘要:
The invention provides a process for applying a heat shielding coating system on a metallic substrate. The coating system comprises at least three individual layers selected from the group of barrier layer, hot gas corrosion protection layer, protection layer, heat barrier layer, and smoothing layer. The coating system is applied to the metallic substrate by low pressure plasma spraying in a single operation cycle. This process enables the layers to be applied in an arbitrary sequence. The process is preferably used in applying a coating system to a turbine blade, particularly a stator or a rotor blade of a stationary gas turbine or of an aircraft engine, or to another component in a stationary or aircraft turbine that is subjected to hot gas.
摘要:
Bearing device (1) with a first bearing part (2) and a second bearing part (3) which cooperate in bearing contact, wherein the first bearing part (2) and the second bearing part (3) is each provided with a surface layer (21, 31), wherein the hardness of the surface layer (21) of the first bearing part (2) is greater than the hardness of the surface layer (31) of the second bearing part (3).
摘要:
The invention relates to a spray powder for coating a substrate (2), in particular for coating a bearing part (2) of a bearing apparatus, the spraying powder having at least the following composition: carbon=0.1% to 1.5% by weight, manganese=0.1% to 8% by weight, sulphur=0.1% to 2% by weight, copper=0.1% to 12% by weight and iron=the balance in % by weight to 100%.
摘要:
The invention relates to a material based on an oxide ceramic for the manufacture of a surface layer (5) by means of a thermal coating process including aluminum oxide and zirconium oxide, with the material additionally containing chromium oxide for the simultaneous optimization of the hardness and toughness of the surface layer (5).