27:
142:), but where the temperatures are over 6,000 °C (10,800 °F) near the arc, the hydrogen breaks down into its atomic form, 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.
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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
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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
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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.
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The arc is maintained independently of the workpiece or parts being welded. The hydrogen gas is normally diatomic (H
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Welding
Handbook Vol. 2 Library of Congress number 90-085465 copyright 1991 by American Welding Society
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131:, which can severely damage the properties of many metals. It eliminates the need of
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Norton science encyclopedia 1st and 6th edition copyright 1921–1950 and 1976
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textbook Fifth edition. Upper Saddle River: Pearson
Education, Inc., 2006
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torch can only reach 2800 °C. This is the third-hottest flame after
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torch merely reaches 3300 °C. This device may be called an
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The Inside of Atomic
Hydrogen Arc Welding, Part 2 - 1943
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The Inside of Atomic
Hydrogen Arc Welding, Part 1 - 1943
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The heat produced by this torch is sufficient to weld
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253:Van Nostrand's Encyclopedia of Science (Pg. 1311)
295:Odhams Practical & Technical Encyclopaedia
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228:"Lateral Science - Atomic Hydrogen Blowtorch"
8:
119:, preventing oxidation and contamination by
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115:. The presence of hydrogen also acts as a
19:"AHW" redirects here. For other uses, see
16:Arc welding process under an H2 atmosphere
261:Manufacturing Engineering and Technology
259:Kalpkjian, Serope and Steven R. Schmid.
30:An atomic hydrogen blowpipe, circa 1930.
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190:Oxy-fuel welding and cutting#Hydrogen
49:process that uses an arc between two
7:
156:This process is being replaced by
14:
210:"ERW Steel Pipe - Specification"
100:. The process was also known as
64:in the course of his studies of
456:Shielded metal (Stick/MMA/SMAW)
446:Gas tungsten (Heliarc/TIG/GTAW)
441:Gas metal (Microwire/MIG/GMAW)
60:. The process was invented by
1:
56:in a shielding atmosphere of
421:Atomic hydrogen (Athydo/AHW)
145:In atomic hydrogen welding,
314:"Atomic Hydrogen Blowtorch"
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18:
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479:Electric resistance (ERW)
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291:"Atomic-Hydrogen Welding"
268:"Atomic Hydrogen Welding"
111:(3422 °C), the most
214:Grand Metal Corporation
35:Atomic hydrogen welding
297:. 1947. Archived from
94:nascent hydrogen torch
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704:Hydrogen technologies
673:Tools and terminology
158:gas metal-arc welding
90:atomic hydrogen torch
84:at 4525 °C. An
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80:at 4987 °C and
21:AHW (disambiguation)
509:Friction stir (FSW)
484:Electron-beam (EBW)
164:Video documentation
606:Heat-affected zone
534:Oxyacetylene (OAW)
324:on 11 January 2008
301:on 11 January 2008
135:for this purpose.
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489:Electroslag (ESW)
436:Flux-cored (FCAW)
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519:Laser beam (LBW)
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274:. Archived from
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230:. Archived from
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113:refractory metal
102:arc-atom welding
78:dicyanoacetylene
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580:Power supply
570:Filler metal
524:Laser-hybrid
451:Plasma (PAW)
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367:Metalworking
326:. Retrieved
322:the original
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299:the original
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280:. Retrieved
276:the original
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147:filler metal
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70:electric arc
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699:Arc welding
643:Fabrication
621:Weldability
413:Arc welding
74:oxyhydrogen
47:arc welding
693:Categories
663:Metallurgy
544:Ultrasonic
539:Spot (RSW)
494:Exothermic
328:2008-01-26
305:2008-01-26
282:2008-01-26
238:2008-01-26
196:References
54:electrodes
658:Machining
653:Jewellery
565:Electrode
558:Equipment
86:acetylene
668:Smithing
504:Friction
184:See also
125:nitrogen
109:tungsten
82:cyanogen
58:hydrogen
51:tungsten
45:) is an
678:Welding
648:Forming
638:Casting
405:Welding
151:circuit
575:Helmet
129:oxygen
121:carbon
68:. The
43:Athydo
585:Robot
549:Upset
499:Forge
431:Flash
133:flux
127:or
96:or
41:or
39:AHW
695::
316:.
293:.
270:.
212:.
123:,
104:.
92:,
397:e
390:t
383:v
359:e
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140:2
37:(
23:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
