PROCESS FOR PRODUCING A HEAT TREATMENT ATMOSPHERE BY SEPARATION OF AIR BY PERMEATION
The invention relates to a process for creating an atmosphere for the heat treatment of metals, the atmosphere being produced by introducing a stream of gaseous nitrogen, according to which there is first formed, by air separation by means of selective permeation, a crude gaseous nitrogen stream hav...
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| creator | PHILIPPE QUEILLE ERIC DUCHATEAU |
| description | The invention relates to a process for creating an atmosphere for the heat treatment of metals, the atmosphere being produced by introducing a stream of gaseous nitrogen, according to which there is first formed, by air separation by means of selective permeation, a crude gaseous nitrogen stream having a residual oxygen content, to which is added a stream of hydrogen which is at least sufficient to remove most of the residual oxygen by catalytic reaction to form water vapour, characterised by the combined implementation of the following measures: a) the air separation by selective permeation is carried out in such a way that the gaseous nitrogen stream has a residual oxygen content of between 0.5% and 3%; b) the catalytic reaction to form water vapour is brought about exclusively with catalysts which are used without external application of heat, and c) the catalytic reaction to form water vapour is carried out in such a way that the residual oxygen content is less than 30 vpm, with a water vapour content of between 1% and 6%, relative to the nitrogen stream, being created. Exclusive application to the annealing or brazing of copper, the decarburising and nitriding annealing of steels, and the sintering of copper, nickel and copper-nickel alloys where appropriate with lead, and copper-zinc alloys. |
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Exclusive application to the annealing or brazing of copper, the decarburising and nitriding annealing of steels, and the sintering of copper, nickel and copper-nickel alloys where appropriate with lead, and copper-zinc alloys.</description><edition>5</edition><language>eng</language><subject>ALLOYS ; CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS ; CHEMISTRY ; CLADDING OR PLATING BY SOLDERING OR WELDING ; COMPOUNDS THEREOF ; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING ; FERROUS OR NON-FERROUS ALLOYS ; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS ; INORGANIC CHEMISTRY ; MACHINE TOOLS ; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS ; METAL-WORKING NOT OTHERWISE PROVIDED FOR ; METALLURGY ; METALLURGY OF IRON ; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS ; NON-METALLIC ELEMENTS ; PERFORMING OPERATIONS ; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL ; SEPARATION ; SOLDERING OR UNSOLDERING ; TRANSPORTING ; TREATMENT OF ALLOYS OR NON-FERROUS METALS ; WELDING ; WORKING BY LASER BEAM</subject><creationdate>1990</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19900926&DB=EPODOC&CC=ZA&NR=898876B$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,778,883,25547,76298</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19900926&DB=EPODOC&CC=ZA&NR=898876B$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>PHILIPPE QUEILLE</creatorcontrib><creatorcontrib>ERIC DUCHATEAU</creatorcontrib><title>PROCESS FOR PRODUCING A HEAT TREATMENT ATMOSPHERE BY SEPARATION OF AIR BY PERMEATION</title><description>The invention relates to a process for creating an atmosphere for the heat treatment of metals, the atmosphere being produced by introducing a stream of gaseous nitrogen, according to which there is first formed, by air separation by means of selective permeation, a crude gaseous nitrogen stream having a residual oxygen content, to which is added a stream of hydrogen which is at least sufficient to remove most of the residual oxygen by catalytic reaction to form water vapour, characterised by the combined implementation of the following measures: a) the air separation by selective permeation is carried out in such a way that the gaseous nitrogen stream has a residual oxygen content of between 0.5% and 3%; b) the catalytic reaction to form water vapour is brought about exclusively with catalysts which are used without external application of heat, and c) the catalytic reaction to form water vapour is carried out in such a way that the residual oxygen content is less than 30 vpm, with a water vapour content of between 1% and 6%, relative to the nitrogen stream, being created. Exclusive application to the annealing or brazing of copper, the decarburising and nitriding annealing of steels, and the sintering of copper, nickel and copper-nickel alloys where appropriate with lead, and copper-zinc alloys.</description><subject>ALLOYS</subject><subject>CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS</subject><subject>CHEMISTRY</subject><subject>CLADDING OR PLATING BY SOLDERING OR WELDING</subject><subject>COMPOUNDS THEREOF</subject><subject>CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING</subject><subject>FERROUS OR NON-FERROUS ALLOYS</subject><subject>GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS</subject><subject>INORGANIC CHEMISTRY</subject><subject>MACHINE TOOLS</subject><subject>MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS</subject><subject>METAL-WORKING NOT OTHERWISE PROVIDED FOR</subject><subject>METALLURGY</subject><subject>METALLURGY OF IRON</subject><subject>MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS</subject><subject>NON-METALLIC ELEMENTS</subject><subject>PERFORMING OPERATIONS</subject><subject>PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL</subject><subject>SEPARATION</subject><subject>SOLDERING OR UNSOLDERING</subject><subject>TRANSPORTING</subject><subject>TREATMENT OF ALLOYS OR NON-FERROUS METALS</subject><subject>WELDING</subject><subject>WORKING BY LASER BEAM</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1990</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZAgJCPJ3dg0OVnDzD1IAsl1CnT393BUcFTxcHUMUQoKApK-rX4gCkPIPDvBwDXJVcIpUCHYNcAxyDPH091Pwd1Nw9AwCCQa4Bvm6ggV5GFjTEnOKU3mhNDeDnJtriLOHbmpBfnxqcUFicmpeakl8lKOFpYWFuZmTMUEFABkNLxg</recordid><startdate>19900926</startdate><enddate>19900926</enddate><creator>PHILIPPE QUEILLE</creator><creator>ERIC DUCHATEAU</creator><scope>EVB</scope></search><sort><creationdate>19900926</creationdate><title>PROCESS FOR PRODUCING A HEAT TREATMENT ATMOSPHERE BY SEPARATION OF AIR BY PERMEATION</title><author>PHILIPPE QUEILLE ; ERIC DUCHATEAU</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_ZA898876B3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>1990</creationdate><topic>ALLOYS</topic><topic>CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS</topic><topic>CHEMISTRY</topic><topic>CLADDING OR PLATING BY SOLDERING OR WELDING</topic><topic>COMPOUNDS THEREOF</topic><topic>CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING</topic><topic>FERROUS OR NON-FERROUS ALLOYS</topic><topic>GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS</topic><topic>INORGANIC CHEMISTRY</topic><topic>MACHINE TOOLS</topic><topic>MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS</topic><topic>METAL-WORKING NOT OTHERWISE PROVIDED FOR</topic><topic>METALLURGY</topic><topic>METALLURGY OF IRON</topic><topic>MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS</topic><topic>NON-METALLIC ELEMENTS</topic><topic>PERFORMING OPERATIONS</topic><topic>PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL</topic><topic>SEPARATION</topic><topic>SOLDERING OR UNSOLDERING</topic><topic>TRANSPORTING</topic><topic>TREATMENT OF ALLOYS OR NON-FERROUS METALS</topic><topic>WELDING</topic><topic>WORKING BY LASER BEAM</topic><toplevel>online_resources</toplevel><creatorcontrib>PHILIPPE QUEILLE</creatorcontrib><creatorcontrib>ERIC DUCHATEAU</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>PHILIPPE QUEILLE</au><au>ERIC DUCHATEAU</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>PROCESS FOR PRODUCING A HEAT TREATMENT ATMOSPHERE BY SEPARATION OF AIR BY PERMEATION</title><date>1990-09-26</date><risdate>1990</risdate><abstract>The invention relates to a process for creating an atmosphere for the heat treatment of metals, the atmosphere being produced by introducing a stream of gaseous nitrogen, according to which there is first formed, by air separation by means of selective permeation, a crude gaseous nitrogen stream having a residual oxygen content, to which is added a stream of hydrogen which is at least sufficient to remove most of the residual oxygen by catalytic reaction to form water vapour, characterised by the combined implementation of the following measures: a) the air separation by selective permeation is carried out in such a way that the gaseous nitrogen stream has a residual oxygen content of between 0.5% and 3%; b) the catalytic reaction to form water vapour is brought about exclusively with catalysts which are used without external application of heat, and c) the catalytic reaction to form water vapour is carried out in such a way that the residual oxygen content is less than 30 vpm, with a water vapour content of between 1% and 6%, relative to the nitrogen stream, being created. Exclusive application to the annealing or brazing of copper, the decarburising and nitriding annealing of steels, and the sintering of copper, nickel and copper-nickel alloys where appropriate with lead, and copper-zinc alloys.</abstract><edition>5</edition><oa>free_for_read</oa></addata></record> |
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| subjects | ALLOYS CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS CHEMISTRY CLADDING OR PLATING BY SOLDERING OR WELDING COMPOUNDS THEREOF CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING FERROUS OR NON-FERROUS ALLOYS GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS INORGANIC CHEMISTRY MACHINE TOOLS MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS METAL-WORKING NOT OTHERWISE PROVIDED FOR METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS NON-METALLIC ELEMENTS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION SOLDERING OR UNSOLDERING TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS WELDING WORKING BY LASER BEAM |
| title | PROCESS FOR PRODUCING A HEAT TREATMENT ATMOSPHERE BY SEPARATION OF AIR BY PERMEATION |
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