摘要:
A process for manufacturing a turbine engine component (10) comprises the steps of: casting ingots made of a gamma TiAl material using a double vacuum arc remelting casting technique; subjecting the cast ingots to a hot isostatic pressing to close porosity; forming at least one pancake of the gamma TiAl material by isothermally forging the hot isostatic pressed ingots; sectioning each pancake into a plurality of blanks; heat treating the blanks to produce a desired microstructure and mechanical properties; and machining the blanks into finished turbine engine components (10). A system for performing the process is also disclosed.
摘要:
An elongated rod assembly (40) is made by preparing a plurality of rods (42). Each rod (42) is prepared by the steps of furnishing at least one nonmetallic precursor compound, thereafter chemically reducing the precursor compounds to produce the metallic material, and thereafter consolidating the metallic material to form the rod (42), wherein the rod (42) has a rod length equal to the assembly length. The rods (42) are bundled together to form a bundled rod assembly (40). The rod assembly (40) may be used as a consumable feedstock in a melting-and-casting operation.
摘要:
An apparatus and method allows the width of high-melting temperature reactive metallic slabs produced in an electron beam melting furnace to be easily changed. The apparatus for production of the metallic slabs by the electron beam melting has a metal melting part and a metal extraction part mutually separated by an air tight valve; a metal melting part has a melting chamber, electron gun, hearth, a mold of variable wall distance, and an air tight valve; and the metal extraction part has a slab chamber, an extraction base, an extracting shaft, and an drive unit for extracting the metal slab. The method for production of the metallic slab using this apparatus has a step of pulling a previous metallic slab produced in the rectangular mold out of the rectangular mold, a step of moving the short mold wall(s) of the rectangular mold to change the width of the rectangular mold, and a step of producing a subsequent metallic slab.
摘要:
The reactor primarily intended for titanium production, comprising a body (1) with the tubular jacket cooled by a cooling medium, which is equipped with melting electrodes (5) and which is adjusted for introduction of gaseous medium including titanium, for introduction of liquid reducing agent and for charging of fluxing agents, and further adjusted for discharge of by-pass products and produced titanium. The subject matter of the invention consists in the fact that the interior of the reactor is divided into the reduction section (2) and the melting section (3) divided by a barrier (4) with a by pass aperture (41), where the melting section (3) comprises the melting chamber (31) in which the sets of main melting electrodes (5) are located and which is in its upper part furnished with a hopper (32) designed for charging fluxing agents, and where the reduction section (2) comprises the reaction chamber (21) into which reaction channels open being directed from the mixing chambers (23); channels for delivering gaseous titanium-content medium (24) being open into the reaction channels in their upper part and at the same time the funnel chamber (25) delivering the liquid reduction agent being connected with the reaction channels.
摘要:
This invention provides an electron beam melting apparatus and a melting method that, in producing an ingot by dissolving a metal with an electron beam, can suppress the occurrence of new impurities in the ingot production, are less likely to again cause inclusion of once evaporated impurities from a melt pool within a hearth or a mold, and can be improved in operating rate. The electron beam melting apparatus for melting a high-melting metal comprises a raw material feed part for feeding a raw material, a raw material melting part, which is continued from the raw material feed part and, at the same time, is defined by a furnace wall and a ceiling wall, and comprises at least a hearth, a water cooling mold and an electron gun, and an exhaust part continued from the raw material melting part. In this electron beam melting apparatus, at least one of the furnace wall and the ceiling wall is lined with titanium or stainless steel, and, in addition, a plurality of fin-shaped members formed of titanium or stainless steel is provided in the ceiling wall. A lining, which can be attached and detached, is provided on the inner face of the electron beam melting apparatus.
摘要:
A method of separating components from a metal based composite, the method including the steps of increasing the size of a component to be separated and separating the increased sized component from the other components of the composite.
摘要:
Articles for use with highly reactive alloys that include a graphite crucible (10) having an interior (12), and at least a first protective layer (16) applied to the interior (12) of the graphite crucible (10) in which the graphite crucible (10) having the first protective layer (16) is used for melting highly reactive alloys.
摘要:
A mixed molten salt containing CaCl2 and NaCl is held in reaction vessel (1) at 600°C or below. Not only Na but also TiCl4 as a raw material for Ti is introduced in the reaction vessel (1). Na having been introduced in the reaction vessel (1) replaces Ca to thereby cause Ca to be dissolved in the molten salt, so that the TiCl4 introduced in the molten salt is reduced. Thus, Ti particles are formed. The formed Ti particles together with the molten salt are transferred to separation tank (2) wherein the Ti particles and Na are separated from the molten salt. The remaining molten salt is transferred to electrolyzer tank (3), and high-temperature electrolysis is carried out at over 600°C to thereby form Na. The formed Na is recycled to the reaction vessel (1) and compensates for the Na consumed in the reaction vessel (1). Production of Ti and a Ti alloy through Ca reduction can be performed in an economical manner by circulatory use of Na whose handling is easy while avoiding direct use of highly reactive Ca.