Abstract: A metal alloy is for use at very high temperature, in particular the metal alloy can be used in a process for the manufacture of mineral wool by fiberizing a molten mineral composition. The metal alloy contains the following elements, the proportions being shown as percentage by weight of the alloy: Cr 20 to 35% Fe 10 to 25% W 2 to 10% Nb 0.5 to 2.5% Ti 0 to 1% C 0.2 to 1.2% Co less than 5% Si less than 0.9% Mn less than 0.9% the remainder consisting of nickel and unavoidable impurities.

Abstract: The invention relates to an alloy having high temperature mechanical strength in an oxidizing medium and comprising a carbide-precipitation-strengthened matrix containing chromium. The invention is characterized in that the alloy comprises carbides of at least one metal (M) selected from among titanium, zirconium and hafnium, said carbides also optionally containing (M?) tantalum. The invention is suitable for articles that require high temperature mechanical strength, such as for hot glass processing or production.

Abstract: An improved heat transfer tube, an improved method of formation and an improved use of such a heat transfer tube is disclosed. The heat transfer tube includes an outer surface with a plurality of radially outwardly extending helical fins, the fins being grooved to define notches, a plurality of channels extending between adjacent fins, at least one nucleate boiling pore formed at the intersection of a notch and a channel. The fins are flattened or pushed down to form a primary nucleate boiling cavity within the at least one nucleate boiling pore; and the tips of the fins are further bent over or flattened to form a secondary nucleate boiling cavity within the at least one nucleate boiling pore. Also disclosed are improved refrigerant evaporator including at least one such boiling tube and a method of making such a boiling tube.

Abstract: The process for manufacturing mineral wool by internal centrifuging is characterized in that the temperature of the mineral material in the fiberizing spinner dish is at least 1150° C. and in that the fiberizing spinner dish is made of a cobalt-based alloy comprising the following elements (in percentages by weight of the alloy): 1 Cr  23 to 34% Fe less than 3% Ni   6 to 12% Si less than 1% Ta   3 to 10% Mn less than 0.5% C 0.2 to 1.2% Zr less than 0.

Abstract: Spinner discs for use in the fiberization of glass in rotary fiberization processes are made of intermetallic compounds of aluminides of nickel (Ni3Al and NiAl).

Abstract: Cobalt alloys are disclosed for use in the fabrication of spinner discs for fiberizing molten glass into fibers in rotary fiberizing processes. The cobalt alloys fall within the following ranges, in percentage by weight, Co 22.0-54.0; Cr 30.0-34.0; Ni 9.0-31.0; Mo 0.0-7.0; C 0.45-0.65; Si 0.25-1.0; Mn 0.30-0.80; precious metals (PM) 0.0-2.0; and carbide forming metals (CFM) 0.0-1.3.

Abstract: A fiberizer has a spinning head that is partitioned to create separate extrusion zones for fiber formation. Molten feed stock is allocated between the zones to promote a greater formation of fiber of having a narrow spectrum of fiber diameters.

Abstract: A multi-component fiberizing disk for fiberizing a molten fiberizable material in a rotary fiberization process includes: an annular sidewall having fiberizing holes therein through which a molten fiberizable material passes to fiberize the molten fiberizable material; an upper annular flange; and a base having an annular outer peripheral edge. The annular sidewall, the upper annular flange and the base are made from at least two separate components and, preferably, from three separate components. The separate components are secured to together as the fiberizing disk by fasteners, such as bolt and nut fasteners, that permits the separate components of the fiberizing disk to be disassembled after service. The different components can be made of different metal alloys and a distribution manifold can be incorporated into the fiberizing disk for distributing the molten fiberizable material(s) within the fiberizing disk and to make bi-component fibers.

Abstract: A durable, corrosion-resistant glass fiber spinner is prepared by applying as a barrier layer a uniform layer of an alloy, compatible with the material of the spinner, on the walls of the spinner bores. A layer of platinum group metal is applied over the barrier layer.

Abstract: A durable, corrosion-resistant fiberglass spinner is prepared by applying a uniform layer of titanium nitride to the bores of the spinner by chemical vapor deposition, and applying over the layer of titanium nitride a layer of platinum by transient liquid phase deposition.