Intermediate pressure electron beam furnace
In the representative embodiment described in the specification, an electron beam furnace has an evacuation system which maintains the interior of the furnace at a pressure in the range from about 50 microns Hg to 300 microns Hg. The relatively high pressure reduces degassing time from a cold start,...
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| creator | HARKER HOWARD R |
| description | In the representative embodiment described in the specification, an electron beam furnace has an evacuation system which maintains the interior of the furnace at a pressure in the range from about 50 microns Hg to 300 microns Hg. The relatively high pressure reduces degassing time from a cold start, suppresses volatilization of constituents of metal being refined, and causes volatilized metal to condense in powder form on a condensing screen. A vibrator assists in removing the powder from the condensing screen. The electron beam gun has a series of compartments which are individually evacuated to maintain the pressure in the compartment containing the cathode at a level less than about 1 micron Hg. |
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The relatively high pressure reduces degassing time from a cold start, suppresses volatilization of constituents of metal being refined, and causes volatilized metal to condense in powder form on a condensing screen. A vibrator assists in removing the powder from the condensing screen. The electron beam gun has a series of compartments which are individually evacuated to maintain the pressure in the compartment containing the cathode at a level less than about 1 micron Hg.</description><language>eng</language><subject>CASTING ; CASTING OF METALS ; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES ; CHEMISTRY ; FERROUS OR NON-FERROUS ALLOYS ; METALLURGY ; PERFORMING OPERATIONS ; POWDER METALLURGY ; PRETREATMENT OF RAW MATERIALS ; PRODUCTION AND REFINING OF METALS ; TRANSPORTING ; TREATMENT OF ALLOYS OR NON-FERROUS METALS</subject><creationdate>1993</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=19930629&DB=EPODOC&CC=US&NR=5222547A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25562,76317</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19930629&DB=EPODOC&CC=US&NR=5222547A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>HARKER; HOWARD R</creatorcontrib><title>Intermediate pressure electron beam furnace</title><description>In the representative embodiment described in the specification, an electron beam furnace has an evacuation system which maintains the interior of the furnace at a pressure in the range from about 50 microns Hg to 300 microns Hg. The relatively high pressure reduces degassing time from a cold start, suppresses volatilization of constituents of metal being refined, and causes volatilized metal to condense in powder form on a condensing screen. A vibrator assists in removing the powder from the condensing screen. The electron beam gun has a series of compartments which are individually evacuated to maintain the pressure in the compartment containing the cathode at a level less than about 1 micron Hg.</description><subject>CASTING</subject><subject>CASTING OF METALS</subject><subject>CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES</subject><subject>CHEMISTRY</subject><subject>FERROUS OR NON-FERROUS ALLOYS</subject><subject>METALLURGY</subject><subject>PERFORMING OPERATIONS</subject><subject>POWDER METALLURGY</subject><subject>PRETREATMENT OF RAW MATERIALS</subject><subject>PRODUCTION AND REFINING OF METALS</subject><subject>TRANSPORTING</subject><subject>TREATMENT OF ALLOYS OR NON-FERROUS METALS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1993</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZND2zCtJLcpNTclMLElVKChKLS4uLUpVSM1JTS4pys9TSEpNzFVIKy3KS0xO5WFgTUvMKU7lhdLcDPJuriHOHrqpBfnxqcUFQCV5qSXxocGmRkZGpibmjsaEVQAA8BEpGw</recordid><startdate>19930629</startdate><enddate>19930629</enddate><creator>HARKER; HOWARD R</creator><scope>EVB</scope></search><sort><creationdate>19930629</creationdate><title>Intermediate pressure electron beam furnace</title><author>HARKER; HOWARD R</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_US5222547A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>1993</creationdate><topic>CASTING</topic><topic>CASTING OF METALS</topic><topic>CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES</topic><topic>CHEMISTRY</topic><topic>FERROUS OR NON-FERROUS ALLOYS</topic><topic>METALLURGY</topic><topic>PERFORMING OPERATIONS</topic><topic>POWDER METALLURGY</topic><topic>PRETREATMENT OF RAW MATERIALS</topic><topic>PRODUCTION AND REFINING OF METALS</topic><topic>TRANSPORTING</topic><topic>TREATMENT OF ALLOYS OR NON-FERROUS METALS</topic><toplevel>online_resources</toplevel><creatorcontrib>HARKER; HOWARD R</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>HARKER; HOWARD R</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Intermediate pressure electron beam furnace</title><date>1993-06-29</date><risdate>1993</risdate><abstract>In the representative embodiment described in the specification, an electron beam furnace has an evacuation system which maintains the interior of the furnace at a pressure in the range from about 50 microns Hg to 300 microns Hg. The relatively high pressure reduces degassing time from a cold start, suppresses volatilization of constituents of metal being refined, and causes volatilized metal to condense in powder form on a condensing screen. A vibrator assists in removing the powder from the condensing screen. The electron beam gun has a series of compartments which are individually evacuated to maintain the pressure in the compartment containing the cathode at a level less than about 1 micron Hg.</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | CASTING CASTING OF METALS CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES CHEMISTRY FERROUS OR NON-FERROUS ALLOYS METALLURGY PERFORMING OPERATIONS POWDER METALLURGY PRETREATMENT OF RAW MATERIALS PRODUCTION AND REFINING OF METALS TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS |
| title | Intermediate pressure electron beam furnace |
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