Abstract: A batch furnace for annealing material, in particular a single chamber furnace or single coil furnace, with a furnace housing. The batch furnace has a closable charging opening, a receiving chamber for receiving furnace material, and a device for convective heat transfer onto the furnace material by a heat transfer medium. The batch furnace includes at least one fan, which is arranged in the furnace housing, at least one heating device for the heat transfer medium and/or at least one inlet for an externally heated heat transfer medium, wherein the heating device and/or the inlet is arranged directly in front of the intake side or directly behind the pressure side of the fan or circumferentially in an annular gap between the fan and the furnace housing, and a receiving chamber for the furnace material, which is arranged on the pressure side of the fan.

Abstract: A carbide saw blade and the welding method of the carbide saw blade includes: S1, heating the carbide tool bit, the saw blade base (the saw blade base's tooth seat part), the welding wire and the welding flux that well-placed; S2, at temperature 760° C.-840° C., spreading the melted welding wire to the gap between the carbide tool bit and the saw blade base by using the wetting action of the welding flux; S3, cooling to obtain a preliminary welding body, when the temperature of the preliminary welding body is lower than 350° C., the preliminary welding body will be processed to first tempering; S4, within 1-3 hours after first tempering, second tempering the preliminary welding body to obtain carbide saw blade; second tempering process is performed in a sealed container, and in this container the temperature of each spatial location is consistent.

Abstract: A furnace (1), which, for the heat treatment of metal workpieces, has a tubular metal retort (3) and a furnace housing (2) enclosing the retort (3), the retort (3) comprising a gastight closable treatment or batch space (10), which receives the protective and reactive gases, for the heat treatment of the workpieces and a receptacle framework (8) as a batch receptacle for the positioning thereof, the weight of the batch and the receptacle framework (8) is decoupled from the retort (3), the receptacle framework (8) is connected to means (5) for support on the furnace housing (2), and the means (5) are guided gastight in passages (6) of a wall (2.1) of the furnace housing (2) and a wall (3.1) of the retort (3).

Abstract: A method and device for the heat treatment of a profile, in particular an extruded profile for aircraft. The profile may be formed by one or more different, in particular curable, aluminium alloys. The method provides that at least two regions of a profile are subjected to a different heat treatment. The device includes a first chamber that encloses a first region of a profile and a second chamber that encloses a second region of the profile, wherein different temperatures can be set in the first and second chambers. The profile has at least two regions that each have different material properties and are formed by differential heat treatment.

Abstract: To increase the usage value and for increased availability of retort furnaces (1), which, for the heat treatment of metal workpieces, have a tubular metal retort (3) and a furnace housing (2) enclosing the retort (3), the retort (3) comprising a gastight closable treatment or batch space (10), which receives the protective and reactive gases, for the heat treatment of the workpieces and a receptacle framework (8) as a batch receptacle for the positioning thereof, the weight of the batch and the receptacle framework (8) is decoupled from the retort (3), the receptacle framework (8) is connected to means (5) for support on the furnace housing (2), and the means (5) are guided gastight in passages (6) of a wall (2.1) of the furnace housing (2) and a wall (3.1) of the retort (3) (FIG. 1).

Abstract: An experiment is conducted in advance, for finding a temperature of a cooling plate attained as a result of balancing between a temperature of a substrate after heat treatment and a temperature of the cooling plate at the time of cooling of the substrate. Then, before heat treatment of a first substrate, the cooling plate is moved to a position above a hot plate, the cooling plate is heated to that temperature, and thereafter heat treatment of the substrate is started.

Abstract: A vacuum furnace adapted to cool a load. The vacuum furnace has one or more means for cooling a fluid and a muffle substantially containing the load. The fluid flows in a substantially unidirectional flow substantially within the muffle.

Abstract: The interior of a furnace is partitioned into two longitudinally extending and transversely adjacent zones, and one of the zones is heated to a substantially higher treatment temperature than the other of the zones, which may or may not be heated. A steel workpiece is conveyed longitudinally through the furnace with a region of the workpiece moving exclusively through the one zone and another region of the workpiece moving exclusively through the other of the zones such that the regions are heated to different temperatures. The treatment temperature in one of the zone is above the AC1 point for the workpiece and the temperature in the other of the zones is close to or below the AC1 point for the workpiece.

Abstract: A vacuum furnace adapted to cool a load. The vacuum furnace has one or more means for cooling a fluid and a muffle substantially comprised of carbon fiber composite and substantially containing the load. The fluid flows in a substantially unidirectional flow substantially within the muffle.

Abstract: An annealing apparatus includes a gas tight hollow main body, a conveying apparatus and a gas grid. A heating apparatus and a cooling apparatus are installed at an inlet and an outlet of the main body, respectively. The gas grid is installed between the inlet and the outlet to blow the protecting gas into the main body, so as to form a gas screen. The conveying apparatus extends to the inlet and the outlet to convey process material such as heat pipe. Thereby, an open, non-pressure differential environment is established for performing annealing on the process material.

Abstract: A method of treating parts (34) in a treatment chamber (33) by hot-isostatic pressing with an inert gas as pressure medium and in the presence of a purifying agent (25a) for the inert gas comprises the steps of reducing the pressure in the treatment chamber (33), increasing the pressure again by introducing the inert gas, increasing the temperature in the treatment chamber (33) by activating heating elements (9a), and, after a certain holding time, reducing the pressure and the temperature again. Especially if the purifying agent (25a) is of the same material as the parts (34) being treated, the purifying effect of the purifying agent becomes insufficient. The effect of the purifying agent (25a) is improved according to the invention by bringing the inert gas, at least when being introduced, to circulate such that it is heated, passes through the purifying agent and is thereafter cooled before contacting the parts. The invention also relates to a device for carrying out the method.

Abstract: A continuous sintering apparatus to be used for sintering nuclear fuel pellets includes a casing integrally constructed to have an upper portion enclosed in a maintenance glove box. The furnace casing includes a casing body and a ceiling cover removably mounted on the casing body, and the ceiling cover can be opened in the glove box while retaining containment. A furnace member to be accommodated in the casing body comprises a combination of a plurality of divided furnace member units, and the furnace member units can be maintained by glove operations when they are delivered from the inside of the casing body into the glove box. A ceiling crane is disposed at an upper portion of the inside of the glove box, and a ceiling cover tentative space and a maintenance working space are provided in the glove box. A turntable for placing the delivered furnace member unit is preferably disposed in the maintenance working space.

Abstract: The present invention provides a method of heat-treating an oxygen-sensitive workpiece to minimize any oxidation of the workpiece, as well as an improved door seal specially suited for use with oxygen-sensitive products. In the method, an oven has an oven chamber and an outer housing, with an enclosure being defined therebetween. The workpiece is placed in the oven chamber and the chamber is sealed. Heated inert gas is circulated within the enclosure to heat the oven chamber and to hold it at a desired treatment temperature. The oven chamber is then cooled to a threshold temperature of the workpiece using inert gas. The chamber is then cooled further by circulating aerobic gas, preferably ambient air, within the enclosure. Another embodiment of the invention provides an oven with a housing forming an oven chamber, the oven chamber having a door opening in one of said walls.

Abstract: An apparatus for continuously annealing amorphous metal alloy cores with a closed magnetic path consists of a tunnel furnace having a bus bar connected sequentially to a DC power source. Switching is provided to simultaneously close and open electrical contacts provided on either end of the bus bar to ensure a continuous supply of power while loading or unloading jobs. The apparatus has a conveyer and loading and unloading mechanisms at the feeder end and discharge end of the furnace. The bus bar passes through the core window of the amorphous metal alloy core during the annealing process. The apparatus also consists of conventional trip mechanisms, heating and cooling mechanisms and mechanisms for gas flow through the furnace.

Abstract: A pneumatic isostatic forging process for densification of near net shape workpieces is disclosed. In the process, a workpiece is heated prior to the forging process, such as from a previous processing step. The workpiece is loaded into a pressure vessel. The pressure in the vessel is ramped to an operating pressure and held for approximately 10-120 seconds. The vessel is pressurized using rapid pressurization to achieve a high strain rate to assist in the final closure of voids within the workpiece, with the increase in the strain rate lowering the flow stress requirements for the workpiece, thereby making the workpiece more susceptible to plastic deformation.

Abstract: A metal oxidation treatment apparatus to form the passivation film on the surface of the metal to be oxidized such as stainless steel or the like, comprising an oxidation furnace, a gas inlet to introduce gas into said oxidation furnace, a discharge outlet to discharge the gas from said oxidation furnace, and a heater to heat said oxidation furnace to the predetermined temperature, so that the metal to be oxidized is heated and oxidized in dry oxidation atmosphere while gas is passed in said oxidation furnace.

Abstract: A metal oxidation treatment apparatus to form the passivation film on the surface of the metal to be oxidized such as stainless steel or the like, comprising an oxidation furnace, a gas inlet to introduce gas into said oxidation furnace, a discharge outlet to discharge the gas from said oxidation furnace, and a heater to heat said oxidation furnace to the predetermined temperature, so that the metal to be oxidized is heated and oxidized in dry oxidation atmosphere while gas is passed in said oxidation furnace.

Abstract: This invention relates to a method of nitriding steel material in a second heat treatment furnace after fluorinating the steel material in a first heat treat furnace to form a deep and uniform nitrided layer. Then, steel material is treated smoothly by defining the ratio of establishing said both furnaces for fluorinating and nitriding on the basis of treating time required for said both treatments since time required for each treatment is different.

Abstract: A refractory hearth for use in an industrial heat treat furnace is disclosed whereby the hearth contains no alloy parts with the exception of the pusher assembly and the roller chain attached to it. L-shaped ceramic, refractory or silicon carbide tile are placed in position to support material being heat treated, while at the same time preventing the roller chain from rising up out of place. The outside edges of said L-shaped tile shall act as guides to move stock trays in a straight path. Refractory material used to hold hearth in place will also support radiant tubes used to supply heat.

Abstract: Reversing the flow of conventional furnace/retort systems prevents damaging exhaust gases from entering the furnace while still maintaining a gas flow through the retort. The gases exit the retort into a treatment system; preventing contamination of any apparatus and the escape of any hazardous gases.

Abstract: A powder metallurgy consolidation process and apparatus for carrying out said process produces integral metal bodies by heating metal powder of a predetermined composition to a temperature sufficient to cause solid state interparticle bonding, while simultaneously maintaining a reactive fluid in contact with the metal powder. The metal powder is compacted to a density greater than 90% of the full theoretical density of the composition after the reactive fluid has been removed. The reactive fluid is selected to modify the powder particle surface chemistry in order to improve bondability and to obtain other properties as desired. Metal bodies which have been consolidated by the process are sufficiently dense to be mechanically hot worked and exhibit exceptionally low retained gas content.

Abstract: A fluidized bed furnace includes a furnace housing having an outer shell. A furnace base and an outer top plate are secured to the respective lower and upper ends of the housing. A vertical retort has an opened upper end and an opened lower end. The retort is arranged in an opening formed in the outer top plate and extends downwardly into the center of the housing. Heat insulating material is disposed between the outer shell and the vertical retort. A retort base assembly is used to close the lower end of the retort. An upper support device is formed integrally with the retort at its upper end for supporting the vertical retort on top of the outer top plate so as to permit downward growth only during thermal expansion. A lower support device is interposed between the lower surface of the retort base assembly and the upper surface of the furnace base which supports substantially all the weight of the retort, the weight of the load of fluidizable media and the weight of a load of material to be heat treated.

Abstract: A method of sequentially annealing and then hardening long metal components (1,2,3,4) made of fine or special steel with an austenitic structure, said method including at least one annealing operation by supplying heat from the outside in a reducing or neutral atmosphere and one quenching operation by contact with a flow of cooling fluid and an apparatus for putting said method into practice.The flow rate and the temperature of the cooling fluid are adjusted so that the components undergo no transformation of their austenitic structure during hardening.Application to annealing and hardening armoured electric components with conductor cores, inorganic insulant coatings and outer sheaths made of austenitic steel.

Abstract: A method of annealing the flanges of double seamed end panels to obtain an effective seal and apparatus therefor.

Abstract: Apparatus for treating a metal charge comprises a box furnace and a container containing material for treating the charge. The box furnace is mounted on props whose length is sufficient to permit the container to be positioned under the furnace. The furnace has a shroud within which the charge is heated. Means are provided for introducing the charge into the furnace. The shroud and the container are provided with alignable openings through which the heated charge can be transferred, by charge-transfer means, from the furnace to the container. Pressurized gas is supplied to the interiors of the shroud and the container. The charge-transfer means comprises a carrier supported within the container by a support positioned outside the container. Vertical movement of the support relative to the container causes vertical movement of the carrier.

Abstract: A process for metallizing a copper film comprising the step of heat treating a copper film formed by an electroless plating process as opposing electrodes of a ceramic capacitor. The process comprises the steps of placing a ceramic body having a copper film formed on the surface thereof by an electroless plating process within a container sealing the same from the external atmosphere and maintaining constant the internal atmosphere, and heating the container maintaining the surrounding of the container in an inert atmosphere.

Abstract: Heat-treating device for prolonging the life of a pressure vessel formed of thermally resistant material subject to time-dependent structural changes due to neutron fluence includes a heating device positionable within a pressure vessel adjacent to a wall portion thereof which is to be heat-treated; a mounting support for the heating device including a substantially cylindrical, heat-insulating holding member insertable into and removable from the pressure vessel through an opening in the pressure vessel; supply lines for an energy carrier supplying the heat; insulating means for keeping the heat away from heat-sensitive parts of the pressure vessel which are not to be heat-treated and for reducing heat losses during the heat treatment; a hollow substantially cylindrical thermal shield disposed in the pressure vessel and, with the inner peripheral surface of the pressure vessel, defining an annular gap; and a reactor chamber wherein at least part of the pressure vessel is located, the reactor chamber being ot

Abstract: Carbonaceous combustion products (i.e., principally carbon dioxide) and water are removed from nitrogen generator gas by molecular sieve adsorption thereof. The molecular sieve material is regenerated by an initial extended purging with ambient air under vacuum followed by a short burst of pure nitrogen under vacuum to remove any entrapped oxygen.

Abstract: Apparatus for heat treatment of metal pieces such as billets, ingots, bars and the like, by pre-heating using hot gas impingement in a pre-heating furnace, and then transference into a holding furnace using forced hot air circulation where the metal pieces are held for the time required at the desired heat treatment temperature.

Abstract: An apparatus for the control of the carburizing of parts under vacuum in a acuum furnace, with which as a carbon carrier a hydrocarbon gas is introduced controlled in the furnace. A detector detects the occurrence of a soot mist formation. Upon the occurrence of the soot mist a feeder for the hydrocarbon addition is completely or partially interrupted. The detector cooperates with the feeder such that the hydrocarbon addition is again received when the soot mist formation has decayed.

Abstract: Disclosed is a continuous atmosphere controlled furnace for aluminum brazing and other purposes. A plurality of pots are suspended from a circular roof rotatable in a horizontal plane and arranged in a circle having a center on the axis of rotation of the roof. Each pot comprises a body having an open top and a cover capable of closing the open top of the body. The open top of each pot projects above the roof and that portion of each pot which contains the material to be heated extends downwardly below the roof. The material to be heated is supported on a hanger depending from the cover of each pot and the cover is lowered to place the material in the pot and close the pot. The furnace further includes an atmosphere gas distributor having its center on the axis of rotation of the roof and connected to the pots by gas supply and exhaust ducts. A method of supplying atmosphere gas through the pots is also described.

Abstract: A tunnel furnace comprises an elongate hollow structure inclined to have one end higher than the other and is reciprocable about an axis parallel to its length, heaters for heating material to be treated being incorporated in the structure.