Abstract: Device for individual quenching of gears, pinions, bearing rings and other similar components of technical devices, operating in a vacuum furnace installation, whereby the quenching chamber of the installation is fitted with tightly-sealed doors for workpiece loading and unloading. The following elements are fitted inside the quenching chamber: removable table on which an individual workpiece is placed, along with a surrounding set of removable nozzles; the inlet of the quenching chamber features an attached tank supplying the cooling medium to the nozzles—preferably air or nitrogen, or argon or helium, or hydrogen or carbon dioxide, or mixtures thereof—while the outlet of the quenching chamber is connected to the inlet of a tank receiving expanded cooling medium from the chamber; moreover, there is a compressor connected in between the two tanks, ensuring closed-loop flow of the cooling medium.

Abstract: Multi-chamber furnace for vacuum carburizing and quenching of gears, shafts, rings and similar components has at least two process chambers connected in parallel, with a continuous feeding mechanism for individual workpieces. Those chambers—the first one being a heating chamber, the second being a carburizing chamber and the third one diffusion chamber—are configured in a vertical arrangement, placed in a shared vacuum space with gas-tight division, whereas at the ends of each chamber there are incorporated heating chambers with thermal insulation, with a graphite heating system and stepping feeding mechanism incorporated in the core for the purpose of continuous feeding of individual workpieces.

Abstract: Multi-chamber furnace for vacuum carburizing and quenching of gears, shafts, rings and similar components has at least two process chambers connected in parallel, with a continuous feeding mechanism for individual workpieces. Those chambers—the first one being a heating chamber, the second being a carburizing chamber and the third one diffusion chamber—are configured in a vertical arrangement, placed in a shared vacuum space with gas-tight division, whereas at the ends of each chamber there are incorporated heating chambers with thermal insulation, with a graphite heating system and stepping feeding mechanism incorporated in the core for the purpose of continuous feeding of individual workpieces.

Abstract: Device for individual quenching of gears, pinions, bearing rings and other similar components of technical devices, operating in a vacuum furnace installation, whereby the quenching chamber of the installation is fitted with tightly-sealed doors for workpiece loading and unloading. The following elements are fitted inside the quenching chamber: removable table on which an individual workpiece is placed, along with a surrounding set of removable nozzles; the inlet of the quenching chamber features an attached tank supplying the cooling medium to the nozzles—preferably air or nitrogen, or argon or helium, or hydrogen or carbon dioxide, or mixtures thereof—while the outlet of the quenching chamber is connected to the inlet of a tank receiving expanded cooling medium from the chamber; moreover, there is a compressor connected in between the two tanks, ensuring closed-loop flow of the cooling medium.

Abstract: A retort furnace for heat and/or thermochemical treatment designed for technological process in protective gas atmosphere, process gas atmosphere or in vacuum, and used inter alia for annealing pipes made of austenitic alloys, having among other things: a cylindrical outer body with a lid equipped with an active thermal barrier, a cylindrical retort, thermal insulation, a heating system located in the thermal insulation, a cooling system of the furnace. The active thermal barrier constitutes the radiation screens, in the form of at least two metal boards, installed on brackets located at the lid inside the retort. Additionally, radiation caulking rings are located in the extreme areas of the brackets and, circumferential sealing rings are permanently fixed in the casing of the retort.

Abstract: The blower designed particularly for fitting in a chamber furnace has the hub of the rotor wheel in the shape of a solid of revolution with its slant height described by n degree polynomial and its Dp2 outlet diameter greater than Dp1 inlet diameter and the outward diameter of the axial and radial rotor wheel with spatially shaped blades monotonically increasing towards the flow from D1z inlet diameter to D2z outlet diameter.

Abstract: A method and measurement system for the control of an active charge surface in a low pressure carburizing process can avoid formation of by-products and achieve regular carburized layers. This can be achieved through sampling of outlet gas at a specified time and comparison with experimentally set model characteristics.

Abstract: A retort furnace designed for heat and heat and chemical treatment in protective gas atmosphere, process gas atmosphere or in vacuum, equipped with a retort with a lid, made of steel or heat-resisting or creep-resisting alloys, separating the process atmosphere from the ambient atmosphere, with heating elements and thermal insulation outside the retort and with a cooling system. The radiation screens, in the form of at least two metal boards, are installed at supports located at the lid inside the retort; the heating elements are located behind the radiation screens, on the retort side and are separated with the metal screen. A few radiation sealing rings are placed in the extreme area of the brackets. The radiation screens and sealing rings, as well as the circumferential sealing rings permanently fixed in the casing of retort make up the system of reducing heat losses through radiation at the wall of the retort.

Abstract: The subject of this invention relates to method carburizing of steel products, mainly parts of machines, vehicles and every mechanical apparatus, in vacuum furnaces under reduced pressure and elevated temperature. The method of under-pressure carburizing of steel workpieces according to present invention relates to introduction of active nitrogen carrier during heating up of the load. Introduction of the active nitrogen carrier is terminated when the load reaches temperature required to start carburizing process; from this temperature the carbon carrier is added. Pressure in the furnace chamber during continuous or pulse introduction of the active nitrogen carrier should be maintained within the ranges from 1 to 500 mbar.

Abstract: The subject of present invention relates to mixture for carburizing of steel products, mainly parts of machines, vehicles and every mechanical apparatus, used in vacuum furnaces. Present invention relates to mixture for under-pressure carburizing containing the carbon carrier comprising two unsaturated hydrocarbons, likely ethylene and acetylene, in volume ratio from 0.1 to 2.00. The carbon carrier can be further mixed with hydrogen or ammonia.

Abstract: A method and measurement system for the control of an active charge surface in a low pressure carburizing process can avoid formation of by-products and achieve regular carburized layers. This can be achieved through sampling of outlet gas at a specified time and comparison with experimentally set model characteristics.

Abstract: A hydrogen closed-cycle hardening unit is disclosed that consisting of a vacuum oven with an internal quenching and circulation system, adjusted to operate under a pressure of 2 MPa, fitted with conduits and valves for feeding and discharging of quenching atmosphere. The oven, fitted with a hydrogen and/or nitrogen inlet line and an operating gas outlet line, is connected to two conduits, between the conduits' valves, and, through these conduits, to a unit of two containers. The first container, which is connected to an external hydrogen source, contains a metal alloy absorbing hydrogen as a high-pressure hydride, while second container contains a metal alloy absorbing hydrogen as a low-pressure hydride. Both containers are connected by another conduit.

Abstract: A hydrogen closed-cycle hardening unit is disclosed that consisting of a vacuum oven with an internal quenching and circulation system, adjusted to operate under a pressure of 2 MPa, fitted with conduits and valves for feeding and discharging of quenching atmosphere. The oven, fitted with a hydrogen and/or nitrogen inlet line and an operating gas outlet line, is connected to two conduits, between the conduits' valves, and, through these conduits, to a unit of two containers. The first container, which is connected to an external hydrogen source, contains a metal alloy absorbing hydrogen as a high-pressure hydride, while second container contains a metal alloy absorbing hydrogen as a low-pressure hydride. Both containers are connected by another conduit.

Abstract: The subject of present invention relates to mixture for casburizing of steel products, mainly parts of machines, vehicles and every mechanical apparatus, used in vacuum furnaces. Present invention relates to mixture for under-pressure carburizing containing the carbon carrier comprising two unsaturated hydrocarbons, likely ethylene and acetylene, in volume ratio from 0.1 to 2.00. The carbon carrier can be further mixed with hydrogen or ammonia.

Abstract: The subject of this invention relates to method carburizing of steel products, mainly parts of machines, vehicles and every mechanical apparatus, in vacuum furnaces under reduced pressure and elevated temperature. The method of under-pressure carburizing of steel workpieces according to present invention relates to introduction of active nitrogen carrier during heating up of the load. Introduction of the active nitrogen carrier is terminated when the load reaches temperature required to start carburizing process; from this temperature the carbon carrier is added. Pressure in the furnace chamber during continuous or pulse introduction of the active nitrogen carrier should be maintained within the ranges from 1 to 500 mbar.