Abstract: The present disclosure relates to a Fe—Cr—Al tube. More specifically. the present disclosure relates to a Fe—Cr—Al tube having a specific powder composition: in weight %: p Cr 12.00 to 25.00; A1 3.50 to 6.50:5 Ti 0.20 to 1.10; N 0.06 to 0.20; Zr 0.05 to 0.20; Y 0.01 to 0.15; C?0.050; 0 Si?0.50; Hf?0.30; Ta?0.30; Mn?0.40; Ni?0.60:5 O?600 ppm; balance Fe and unavoidable impurities: wherein TiN is present as inoculant.

Abstract: The present disclosure relates to a ferritic iron-chromium-aluminium (FeCrAl) powder which will provide seamless tubes of said powder and therefore will have a combination of good formability and form stability, good oxidation resistance and creep resistance. The present disclosure also relates to a seamless tube comprising a FeCrAl alloy. The FeCrAl powder comprises the following elements in weight %: Balance Fe and unavoidable impurities Al 4.0 to 6.0 0.01 to 0.10 Hf 0.05 to 0.25 O 0.01 to 0.04 Cr 19.0 to 23.0 Ta 0.01 to 0.40 Ti 0.01 to 0.15 C 0.01 to 0.05 N 0.01 to 0.10 Si Max 0.50 Mn Max 0.30 Zr 0.05 to 0.20 fulfilling the condition of: 2*[Y]?3*[O]<0, wherein the number of [Y] and [O] are in atom %.

Abstract: The present disclosure relates to a ferritic iron-chromium-aluminium (FeCrAl) powder of the following composition: Balance Fe and unavoidable impurities Al 4.0 to 6.0 Y max 0.20 Hf 0.05-0.20 O 0.01 to 0.03 Cr 19.0 to 23.0 Ta 0.05 to 0.30 Ti 0.01 to 0.10 C 0.01 to 0.05 N 0.01 to 0.10 Si Max 0.50 Mn Max 0.30 P Max 0.01 S Max 0.01 Zr 0.05 to 0.20 which will provide an object or an alloy thereof with excellent creep-strength.

Abstract: A high temperature iron-chromium-aluminium (FeCrAl) alloy tube extending along a longitudinal axis, wherein the tube is formed from a continuous strip of a high temperature FeCrAl alloy and comprises a helical welded seam. The high temperature FeCrAl alloy tube is manufactured by feeding a continuous strip of the high temperature FeCrAl alloy toward a tube shaping station, helically winding the strip such that long edges of the strip abut each other and a rotating tube moving forward in a direction parallel to its longitudinal axis is formed, and continuously joining said abutting long edges together in a welding process directly when the tube is formed, whereby a welded tube comprising a helical welded seam is obtained.

Abstract: A process of manufacturing a chromium alloyed molybdenum silicide portion of a heating element comprising the steps of: forming a mixture of a chromium powder and a silicon powder; reacting the mixture to a reaction product in an inert atmosphere at a temperature of at least 1100° C. but not more than 1580° C.; converting the reaction product to a powder comprising CrSi2; forming a powder ceramic composition by mixing the powder comprising CrSi2 with a MoSi2 powder and optionally with an extrusion aid; forming the portion of the heating element; and sintering the portion of the heating element in a temperature of from about 1450° C. to about 1700° C.; characterized in that the chromium powder and the silicon powder are provided separately to the mixture.

Abstract: The present disclosure relates to an iron-chromium-aluminum (Fe—Cr—Al) powder suitable for additive manufacturing and to an additive manufacturing process. The present disclosure also relates to an additive manufactured object.

Abstract: An electric gas heater (2) comprises a housing (4), a number of thin tubes (16) arranged in a bundle (18) inside the housing (4), an insulation member (20) configured for supporting the number of thin tubes (16) separated from each other and electrically insulated from each other. Individual tubes (16) of the number of thin tubes (16) are of an electric resistance material, and the insulation member (20) comprises a fibrous material.

Abstract: A heating element comprises a main body having a three-dimensional matrix with an open structure including openings and internal voids, cavities and/or pores extending throughout the main body. The three-dimensional matrix is provided as a lattice having a repeating unit cell extending in three directions. The present heating element is adapted for maximised surface area so as to provide an effective and efficient thermal energy transfer medium.

Abstract: A tube is disclosed comprising an inlet portion, an outlet portion, and a curved tube portion between the inlet and outlet portions. A vertical cross-section of the curved tube portion comprises two substantially straight inner delimiting surfaces meeting each other at an angle <100°. The present disclosure further relates to a method of manufacturing a tube, a computer program, and a computer-readable medium.

Abstract: A process of manufacturing a chromium alloyed molybdenum silicide portion of a heating element comprising the steps of: forming a mixture of a chromium powder and a silicon powder; reacting the mixture to a reaction product in an inert atmosphere at a temperature of at least 1100° C. but not more than 1580° C.; converting the reaction product to a powder comprising CrSi2; forming a powder ceramic composition by mixing the powder comprising CrSi2 with a MoSi2 powder and optionally with an extrusion aid; forming the portion of the heating element; and sintering the portion of the heating element in a temperature of from about 1450° C. to about 1700° C.; characterized in that the chromium powder and the silicon powder are provided separately to the mixture.

Abstract: An arrangement at installation of electrical resistance elements having high operating temperatures, in which arrangement comprises at least one element having a glow zone (3) and support and distance plates (1, 2) to carry the glow zone. The element is corrugated in its lengthwise direction, that the upper corrugations are supported at the tipper edges of vertical supporting plates (1) and that the lower corrugations are supported at distance plates (2) that are arranged between each two adjacent supporting plates (1). The supporting plates (1) and the distance plates (2) are held together by a resilient mounted pull bar (5). The element or the elements are mainly made from molybdenum disilicide.

Abstract: A method for equalizing temperature differences in molten glass in at least one temperature equalization zone that is in the form of a channel for transporting a glass melt. The equalization zone is located upstream from a tapping point, at which the glass is tapped into a mold in a forming machine, or the like. Resistor heating elements are provided in the temperature equalization zone side walls, bottom wall, and roof. The temperatures of the surfaces of the respective side walls, bottom wall, and roof that are in contact with the resistor heating elements are measured. The resistor heating elements are controlled by an electric controller so that the temperatures of the surfaces are substantially equal to a predetermined tapping temperature of the glass melt.

Abstract: A package for a product includes a base plate on which the product is disposed, and a bridge disposed on the base plate in overlying relationship to a first portion of the product. A lid is disposed in overlying relationship to a second portion of the product and is secured to the base plate by a sliding connection which guides the lid for limited sliding movement parallel to the base plate to expose the second portion of the product. The sliding connection constrains the lid against dislodgment from the base plate in a direction perpendicular to the base plate. An intermediate plate is disposed between the base plate and the lid and is arranged to prevent the sliding movement of the lid. The intermediate plate is formed of a tearable material, such as cardboard, wherein tearing of the intermediate plate releases the lid for the sliding movement.

Abstract: The present invention is for a method for heating of blanks and other heating of metallic materials in a furnace before working where heat is transferred to a blank in the furnace by radiation. According to the method of the invention an important part of the radiation hits the walls of the furnace and are reflected there before it is transferred to the blank. Preferably the furnace is designed so that head radiation is reflected also at the bottom of the furnace. At least 50% of the radiation which reaches the blank ought to be reflected radiation. The invention is also for a furnace for heating of blanks and other comprising at least one furnace bottom part (1) and at least one furnace top part (4) having side walls (5, 6, 7, 8) where at least parts of the side walls of the top parts are inclined so that opposite walls are inclined towards each other.

Abstract: A method of cleansing nitrogen oxide (NOx), hydrocarbon (HC) and carbon monoxide (CO) from waste gases, such as the waste gases or exhaust gases originating from burners and internal combustion engines. The waste gases, or exhaust gases, are passed through a catalyst for catalytic cleansing of the gases. The air-fuel ratio, or the lambda value (L), is reduced to a level below L=1. The gases are passed through a first catalyst and then through a second catalyst, to bring the CO-content of the gas in the first catalyst to a sufficiently high level and to reduce NOx to N2 to an extent such as to bring the NOx content down to a predetermined level. Sufficient oxygen (O2) is delivered to the gases at a point between the first and second catalysts to oxidize both CO and HC to CO2 and H2O to such an extent as to reduce the CO-content of the gas to a predetermined level. A gas burner to carry out the method is also disclosed.

Abstract: An infrared radiation lamp that includes an electrically heated filament and a reflector. The filament is a high temperature element that is wound to a helical configuration. The helical filament is free-standing at operating temperatures, and it is positioned in an open reflector made from a ceramic material.

Abstract: A metal wire or a metal strip having a lubricating surface layer is disclosed wherein the surface layer comprises a mixture of a fatty acid having 10-22 carbon atoms and an alkali metal soap of said fatty acid. Furthermore a method of preparing such a wire or strip is disclosed wherein the wire/strip is contacted with a mixture of fatty acid and alkali metal soap according to the above to the formation of the surface layer containing the mixture on the surface of the wire/strip, which surface layer is allowed or caused to dry. The invention also relates to the use of a mixture of fatty acid and an alkali metal soap according to the above for coating as a lubricating surface layer on metal wires or metal strips.