摘要:
The invention relates to a spray material on an iron base for the thermal coating of a substrate, in particular for the thermal coating of a running surface of a cylinder of a reciprocating combustion engine, wherein the spray material includes FeTiO3 as a base material. In accordance with the invention, the spray material includes at least one first solid lubricant composed of a sulfide and one second solid lubricant composed of a fluoride. The invention further relates to a method for manufacturing a spray material, to a spray wire, in particular a spray filler wire for use in a thermal wire spraying method, to a thermal spray layer on an iron base, in particular for a running surface of a cylinder of a reciprocating combustion engine, to a spraying method for manufacturing a thermal spray layer, as well as to the use of a powder material and of a spray wire for manufacturing a thermal spray layer.
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:
A hose connecting device that is suitable for high-pressure applications includes a retainer for connecting a hose end to a hose connecting device element. The retainer may be secured or anchored to a flange of the hose connecting device element. In an embodiment, the retainer includes at least two retaining limbs that are secured on the outside of the hose by a tension device, such as by tightening straps. The retaining limbs may be provided between the outside of the hose and the tension device, and may be clamped therein. In an embodiment, the retaining limbs include recesses with flanges or stepped edges to support the limbs. In an embodiment, tightening straps may dig into the outside of the hose and rest against the hose.
摘要:
A heat shield of a turbo machine is provided with a microstructure. In a preferred embodiment, the microstructure element comprises a plateau, which is arranged on a rib in such a way that the structure has a “T”-shaped cross section. The ribs are preferably embodied as plates set on edge on the heat shield and are aligned with their surface perpendicular to the circumferential direction (U) of the turbo machine. This results in low bending dimensional rigidity in the circumferential direction. In this way, it is possible to accommodate scraping of a component involved in relative motion in the circumferential direction without plastic deformation. Moreover this arrangement gives the maximum possible resistance to a leakage flow. When used at high temperatures, it is furthermore advantageous to provide ways to enable a coolant to be supplied to the microstructure.
摘要:
A dowel member for reinforcing concrete structures includes a metal strip and a plurality of dowels projecting perpendicularly from the strip. Each dowel includes a dowel shank welded at one of its ends to the strip, and a dowel head disposed at the other of its ends. The dowel shank includes a center section having ribs on its outer periphery, and a pair of end sections having smooth cylindrical outer peripheries.
摘要:
A flat ceiling includes a reinforcement for resisting shear forces. The reinforcement is arranged in a bearing area for the flat ceiling and includes several dowel strips arranged in a substantially radial position with respect to a ceiling support. The reinforcement includes a dowel rail and several vertical, parallel dowels that are spaced from one another along the rail. Each dowel has a shank and an enlarged head disposed on at least an end of the shank located opposite to the rail. The shanks located adjacent to the support having a larger diameter than the shanks located farther from the support.
摘要:
A studrail for shear reinforcement for reinforced concrete slabs is composed of a spacing rail (5) and a plurality of studs (6) which are arranged in parallel at a certain distance and provided with enlarged dish-like anchor heads (8) at both ends. The spacing rail (5), produced as a shaped sheet metal rail, grips one anchor head (8) of each stud with its two opposing folded flange edges (10).
摘要:
A fully martensitic quenching and tempering steel (AP) essentially consists of (measured in % by weight): 8 to 15% of Cr, up to 15% of Co, up to 4% of Mn, up to 4% of Ni, up to 8% of Mo, up to 6% of W, 0.5 to 1.5% of V, up to 0.15% of Nb, up to 0.04% of Ti, up to 0.4% of Ta, up to 0.02% of Zr, up to 0.02% of Hf, at most 50 ppm of B, up to 0.1% of C and 0.12-0.25% of N, the content of Mn+Ni being less than 4% and the content of Mo+W being less than 8%, the remainder being iron and usual impurities resulting from smelting.
摘要:
A guide blade for steam turbines, having in the blade interior a cavity (18) to which a vacuum is applied, is provided with an opening (3) for drawing off fluid in the region of the trailing blade edge (4). This opening is provided with a porous cover (7). The cover is dimensioned in such a way that, during operation, all its capillaries are filled with the fluid to be drawn off. It is anchored in the guide blade by a mechanical fastening element (20).The mechanical fastening element (20) is a spring-loaded quick-acting lock and comprises a bush (21) which fixes the cover in the blade opening (3) and projects with its cylindrical part (24) into the blade cavity (18), and a pin (25) which is axially displaceable in the interior of the bush, is equipped with spring means (26) and is provided at its end with a cap (28), which rests on the inner wall of the blade.
摘要:
A turbine blade including a blade foot and a blade. The blade foot is formed by a ductile material and the blade comprises a material which is brittle compared to the ductile material but resistant to high temperature. The two materials are alloys of different chemical compositions and are hot-compacted with the formation of a boundary layer joining the blade foot and blade to produce a bimetallic composite material. The blade foot predominantly comprises a titanium-base alloy and the blade comprises a gamma-titanium aluminide containing 0.5 to 8 atomic percent of a dopant. The turbine blade exhibits outstanding mechanical properties at high temperatures, good ductility at room temperature and a long service life.