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- Atomic_hydrogen_welding abstract "Atomic hydrogen welding (AHW) is an arc welding process that uses an arc between two metal tungsten electrodes in a shielding atmosphere of hydrogen. The process was invented by Irving Langmuir in the course of his studies of atomic hydrogen. The electric arc efficiently breaks up the hydrogen molecules, which later recombine with tremendous release of heat, reaching temperatures from 3400 to 4000 °C. Without the arc, an oxyhydrogen torch can only reach 2800 °C. This is the third hottest flame after dicyanoacetylene at 4987 °C and cyanogen at 4525 °C. An acetylene torch merely reaches 3300 °C. This device may be called an atomic hydrogen torch, nascent hydrogen torch or Langmuir torch. The process was also known as arc-atom welding.The heat produced by this torch is sufficient to weld tungsten (3422 °C), the most refractory metal. The presence of hydrogen also acts as a shielding gas, preventing oxidation and contamination by carbon, nitrogen, or oxygen, which can severely damage the properties of many metals. It eliminates the need of flux for this purpose.The arc is maintained independently of the workpiece or parts being welded. The hydrogen gas is normally diatomic (H2), but where the temperatures are over 600 °C (1100 °F) near the arc, the hydrogen breaks down into its atomic form, simultaneously absorbing a large amount of heat from the arc. When the hydrogen strikes a relatively cold surface (i.e., the weld zone), it recombines into its diatomic form releasing the energy associated with the formation of that bond. The energy in AHW can be varied easily by changing the distance between the arc stream and the workpiece surface. This process is being replaced by gas metal-arc welding, mainly because of the availability of inexpensive inert gases. In atomic hydrogen welding, filler metal may or may not be used. In this process, the arc is maintained entirely independent of the work or parts being welded. The work is a part of the electrical circuit only to the extent that a portion of the arc comes in contact with the work, at which time a voltage exists between the work and each electrode.".
- Atomic_hydrogen_welding thumbnail Atomic_Hydrogen_Arc_Welding_apparatus,_early_1930s,_United_Kingdom.jpg?width=300.
- Atomic_hydrogen_welding wikiPageExternalLink AHW.html.
- Atomic_hydrogen_welding wikiPageExternalLink atomicH.html.
- Atomic_hydrogen_welding wikiPageExternalLink atomic-hydrogen-welding.asp.
- Atomic_hydrogen_welding wikiPageID "3261380".
- Atomic_hydrogen_welding wikiPageLength "4085".
- Atomic_hydrogen_welding wikiPageOutDegree "25".
- Atomic_hydrogen_welding wikiPageRevisionID "689651291".
- Atomic_hydrogen_welding wikiPageWikiLink Acetylene.
- Atomic_hydrogen_welding wikiPageWikiLink Arc_welding.
- Atomic_hydrogen_welding wikiPageWikiLink Carbon.
- Atomic_hydrogen_welding wikiPageWikiLink Category:Arc_welding.
- Atomic_hydrogen_welding wikiPageWikiLink Category:Hydrogen_technologies.
- Atomic_hydrogen_welding wikiPageWikiLink Cyanogen.
- Atomic_hydrogen_welding wikiPageWikiLink Dicyanoacetylene.
- Atomic_hydrogen_welding wikiPageWikiLink Electric_arc.
- Atomic_hydrogen_welding wikiPageWikiLink Electrode.
- Atomic_hydrogen_welding wikiPageWikiLink Electronic_circuit.
- Atomic_hydrogen_welding wikiPageWikiLink File:Atomic_Hydrogen_Arc_Welding_apparatus,_early_1930s,_United_Kingdom.jpg.
- Atomic_hydrogen_welding wikiPageWikiLink Filler_metal.
- Atomic_hydrogen_welding wikiPageWikiLink Flux_(metallurgy).
- Atomic_hydrogen_welding wikiPageWikiLink Gas_metal_arc_welding.
- Atomic_hydrogen_welding wikiPageWikiLink Hydrogen.
- Atomic_hydrogen_welding wikiPageWikiLink Hydrogen_atom.
- Atomic_hydrogen_welding wikiPageWikiLink Irving_Langmuir.
- Atomic_hydrogen_welding wikiPageWikiLink Nitrogen.
- Atomic_hydrogen_welding wikiPageWikiLink Oxy-fuel_welding_and_cutting.
- Atomic_hydrogen_welding wikiPageWikiLink Oxygen.
- Atomic_hydrogen_welding wikiPageWikiLink Oxyhydrogen.
- Atomic_hydrogen_welding wikiPageWikiLink Refractory_metals.
- Atomic_hydrogen_welding wikiPageWikiLink Shielding_gas.
- Atomic_hydrogen_welding wikiPageWikiLink Tungsten.
- Atomic_hydrogen_welding wikiPageWikiLinkText "Atomic hydrogen welding".
- Atomic_hydrogen_welding wikiPageWikiLinkText "atomic hydrogen welding".
- Atomic_hydrogen_welding wikiPageWikiLinkText "hydrogen welding technique".
- Atomic_hydrogen_welding wikiPageUsesTemplate Template:Cite_encyclopedia.
- Atomic_hydrogen_welding wikiPageUsesTemplate Template:Cite_web.
- Atomic_hydrogen_welding wikiPageUsesTemplate Template:Metalworking_navbox.
- Atomic_hydrogen_welding wikiPageUsesTemplate Template:Reflist.
- Atomic_hydrogen_welding subject Category:Arc_welding.
- Atomic_hydrogen_welding subject Category:Hydrogen_technologies.
- Atomic_hydrogen_welding hypernym Process.
- Atomic_hydrogen_welding type Election.
- Atomic_hydrogen_welding type Technology.
- Atomic_hydrogen_welding comment "Atomic hydrogen welding (AHW) is an arc welding process that uses an arc between two metal tungsten electrodes in a shielding atmosphere of hydrogen. The process was invented by Irving Langmuir in the course of his studies of atomic hydrogen. The electric arc efficiently breaks up the hydrogen molecules, which later recombine with tremendous release of heat, reaching temperatures from 3400 to 4000 °C. Without the arc, an oxyhydrogen torch can only reach 2800 °C.".
- Atomic_hydrogen_welding label "Atomic hydrogen welding".
- Atomic_hydrogen_welding sameAs Q3290512.
- Atomic_hydrogen_welding sameAs Svařování_atomárním_vodíkem.
- Atomic_hydrogen_welding sameAs Soldadura_de_hidrógeno_atómico.
- Atomic_hydrogen_welding sameAs Atomair-waterstoflassen.
- Atomic_hydrogen_welding sameAs Soldagem_com_hidrogênio_atômico.
- Atomic_hydrogen_welding sameAs m.091z7j.
- Atomic_hydrogen_welding sameAs Atomické_zváranie.
- Atomic_hydrogen_welding sameAs Атомноводневе_зварювання.
- Atomic_hydrogen_welding sameAs Atom_vodorod_yordamida_payvandlash.
- Atomic_hydrogen_welding sameAs Q3290512.
- Atomic_hydrogen_welding wasDerivedFrom Atomic_hydrogen_welding?oldid=689651291.
- Atomic_hydrogen_welding depiction Atomic_Hydrogen_Arc_Welding_apparatus,_early_1930s,_United_Kingdom.jpg.
- Atomic_hydrogen_welding isPrimaryTopicOf Atomic_hydrogen_welding.