Abstract: The invention relates to a method for generating an atmosphere for heat treating metal parts in a furnace, which includes inserting, in at least one phase of the treatment cycle or at least one area of the heat treatment furnace, a mixture comprising gaseous CO2 and ethanol in the form of fine droplets or vapor, so as to carry out the reaction between the CO2 and the ethanol inside the furnace to form a mixture of hydrogen and CO according to the reaction: CO2+C2H5OH?3 CO+3 H2, characterized in that the injection is performed in a phase of the treatment cycle or in an area of the heat treatment furnace in which the temperature is higher than 750° C., while CO2 alone or optionally mixed with nitrogen is injected in the phase or phases of the treatment cycle or in the area or areas of the furnace in which the temperature is lower than 750° C.

Abstract: The invention concerns in particular a method for purifying an input mixture comprising carbon dioxide (CO<SUB>2</SUB>) and carbon monoxide (CO), to eliminate the carbon monoxide contained in said mixture, which consists in contacting, at a temperature higher than room temperature, the input mixture with a purifying material comprising at least one metal oxide, so as to bring about the reduction of the purifying material by the input mixture, leading to oxidization of at least part of the CO of the input mixture into CO<SUB>2</SUB>. The invention also concerns a gaseous chilling method and installation integrating such a purifying operation.

Abstract: The invention relates to a method for generating an atmosphere for heat treating metal parts in a furnace, which includes inserting, in at least one phase of the treatment cycle or at least one area of the heat treatment furnace, a mixture comprising gaseous CO2 and ethanol in the form of fine droplets or vapor, so as to carry out the reaction between the CO2 and the ethanol inside the furnace to form a mixture of hydrogen and CO according to the reaction: CO2+C2H5OH—?3 CO+3 H2, characterized in that the injection is performed in a phase of the treatment cycle or in an area of the heat treatment furnace in which the temperature is higher than 750° C., while CO2 alone or optionally mixed with nitrogen is injected in the phase or phases of the treatment cycle or in the area or areas of the furnace in which the temperature is lower than 750° C.

Abstract: The invention relates to a gas quenching method of the type that makes use of (i) a quenching cell (V1) which is intended to receive objects to be quenched with a quenching gas and (ii) a buffer capacity (V2) which is designed to contain the quenching gas.

Abstract: The invention concerns in particular a method for purifying an input mixture comprising carbon dioxide (CO<SUB>2</SUB>) and carbon monoxide (CO), to eliminate the carbon monoxide contained in said mixture, which consists in contacting, at a temperature higher than room temperature, the input mixture with a purifying material comprising at least one metal oxide, so as to bring about the reduction of the purifying material by the input mixture, leading to oxidization of at least part of the CO of the input mixture into CO<SUB>2</SUB>. The invention also concerns a gaseous chilling method and installation integrating such a purifying operation.

Abstract: The invention relates to a gas quenching method of the type that makes use of (i) a quenching cell (V1) which is intended to receive objects to be quenched with a quenching gas and (ii) a buffer capacity (V2) which is designed to contain the quenching gas.

Abstract: A rapid cooling method for metal parts, using a pressurized cooling gas, characterized in that the cooling gas comprises one (or several) principal gas(es) absorbing infra-red radiation, selected in such a way as to improve thermal transfer to the part by combining radiative and convective transfer pheonomena in order to optimize the convective transfer coefficient.