摘要:
A gas turbine engine includes: a turbine section including a casing extending circumferentially about a plurality of turbine blades and having at least one seal member coated with an abradable coating. At least one turbine blade has sides and a tip and at least one seal member is located adjacent to the tip of the at least one turbine blade. The tip of the at least one turbine blade has a wear resistant layer and an abrasive coating disposed on the wear resistant layer. The wear resistant layer has a thickness less than or equal to 10 mils (254 micrometers) and includes metal boride compounds.
摘要:
A gas turbine engine includes: a turbine section including a casing extending circumferentially about a plurality of turbine blades and having at least one seal member coated with an abradable coating. At least one turbine blade has sides and a tip and at least one seal member is located adjacent to the tip of the at least one turbine blade. The tip of the at least one turbine blade has a wear resistant layer and an abrasive coating disposed on the wear resistant layer. The wear resistant layer has a thickness less than or equal to 10 mils (254 micrometers) and includes metal boride compounds.
摘要:
A method for treating metal parts is provided that includes positioning a metal part within a reactor chamber, and positioning a boron containing solid form having a porosity of at least 10% by volume in the reactor chamber adjacent to the metal part. A halide containing gas may be introduced to the reactor chamber that the boron containing solid form is present in. The at least one halide containing gas and the boron containing form react to provide a gas that borides the metal part.
摘要:
An article having good wear resistance includes a first component including a boride coating and a second component including a cobalt-chromium-molybdenum coating that is in sliding contact with the boride coating of the first component.
摘要:
A gas injector including in which a gas is passed through high-voltage/low-current electrical discharges before being discharged into the chamber of a thermal treatment furnace. The electrical activation of the gas accelerates desirable reactions between the gas, gases in the furnace chamber, and the chamber workload. Preferably, a hot electrode is electrically charged and the other parts of the gas injector and the furnace are grounded.
摘要:
A crucible used in a powder pack plating process has an aperture below the upper surface of the powder pack to allow a density driven flow of the plating gas generated by the powder pack to move through the powder pack.
摘要:
A coated article and method for manufacturing the same wherein an alloy substrate of iron, nickel, cobalt, or titanium base has a diffusion layer formed thereon of an intermetallic boride of the substrate alloy. A coating is subsequently deposited on the diffusion layer, which coating is a refractory, ceramic or intermetallic compound having desired wear and/or corrosion resistant properties superior to those of the substrate.
摘要:
A process is provided for boriding metals and metal alloys in a fluidized bed at a temperature of from about 580.degree. to about 1300.degree. C. As a boriding agent, there was used a granular material comprising essentially spherical particles having a particle size of from about 0.025 to about 5.00 mm, which granular material was manufactured by spray drying a preferably aqueous suspension or dispersion based on materials that yield boron, and which can contain fillers, extenders and binders.
摘要:
STEEL IS BORIDED BY EMPLOYING A COMPOSITION INCLUDING A BORDING AGENT, AN ACTIVATOR, A DILUENT AND FREE CARBON. THE USE OF THE FREE CARBON PRODUCES PORE FREE BORIDE LAYERS OF NORMAL THICKNESS.
摘要:
PROCESS FOR BORATING METALS IN WHICH THE METAL IS TREATED WITH A PULVERIZED BORATING AGENT CONTAINING A FLUOBORATE AND/OR BORON FLUORIDE AS AN ACCELERATING AGENT.