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plasma torch

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Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005205
EISBN: 978-1-62708-187-0
... Abstract Plasma melting is a material-processing technique in which the heat of a thermal plasma is used to melt a material. This article discusses the two typical design principles of plasma torches in the transferred mode: the tungsten tip design and the hollow copper electrode design. It...
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.a0006647
EISBN: 978-1-62708-213-6
... chamber), a plasma chamber containing a torch and argon gas supplies, a radio-frequency generator and the associated electronics, and the spectrometer involving the detectors for the optical system (i.e., polychromator and monochromator equipped with phototubes) ( Fig. 1 ). Fig. 1 Schematic diagram...
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.a0006641
EISBN: 978-1-62708-213-6
... inductively by radio-frequency (RF) energy in a stream of inert gas. It consists of an assembly of three concentric quartz tubes (plasma torch) surrounded by a copper induction coil connected to a free-running or crystal-controlled RF generator, typically operated at 27 or 40 MHz with an output power of 1 to...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001282
EISBN: 978-1-62708-170-2
... available from some manufacturers. Molds made in this way can duplicate extremely fine detail, such as the relief lettering on a printed page. A plasma spray torch is shown schematically in Fig. 5 . A gas, usually argon, but occasionally including nitrogen, hydrogen, or helium, is allowed to flow between...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003206
EISBN: 978-1-62708-199-3
... Abstract Arc welding methods can be classified into shielded metal arc welding, flux-cored arc welding, submerged arc welding, gas metal arc welding, gas tungsten arc welding, plasma arc welding, plasma-metal inert gas (MIG) welding, and electroslag and electrogas welding. This article provides...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003179
EISBN: 978-1-62708-199-3
.... PLASMA ARC CUTTING (PAC) employs an extremely high-temperature, high-velocity, constricted arc between an electrode contained within the torch and the piece to be cut. The arc is concentrated by a nozzle onto a small area of the workpiece. The metal is continuously melted by the intense heat of the arc...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005197
EISBN: 978-1-62708-187-0
... diameter cupola, a single 2 MW plasma torch was projected into the cupola at tuyere level, as shown in Fig. 8 . Fig. 8 Early version of an experimental plasma cupola used to confirm the concept of plasma heating as a melting technology In the water-cooled torch, an electric arc from a high...
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.a0006651
EISBN: 978-1-62708-213-6
... ionization source (components are not scaled in relation to each other). RF, radio frequency A typical ICP-MS instrument includes a peristaltic pump, nebulizer, spray chamber, torch/injector, RF coil, ion source (plasma), cones, and collision/reaction cells ( Fig. 3...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001225
EISBN: 978-1-62708-170-2
... Abstract Molten salt baths are anhydrous, fused chemical baths used at elevated temperatures for a variety of industrial cleaning applications. This article discusses their applications in paint stripping, polymer removal, casting cleaning, glass removal, and plasma/flame spray removal. It...
Series: ASM Handbook
Volume: 13B
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v13b.a0003817
EISBN: 978-1-62708-183-2
... environmental cracking resistance of the cobalt alloys. Three welding processes that are used for hardfacing with the high-carbon Co-Cr-W alloys, namely, oxyacetylene, gas tungsten arc, and plasma-transferred arc are also discussed. The article examines the effects of various modes of high-temperature corrosion...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.9781627081740
EISBN: 978-1-62708-174-0
Book Chapter

Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005199
EISBN: 978-1-62708-187-0
... section “Ladle Furnace and Vacuum Arc Degassing in this article). Depending on metal, ladle size, and expected heating rate, electrical power of up to several megawatts may be applied. Heating can be done by graphite electrodes, plasma torches, or induction coils. However, graphite electrodes cannot be...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.9781627081733
EISBN: 978-1-62708-173-3
Series: ASM Handbook
Volume: 5A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v05a.9781627081719
EISBN: 978-1-62708-171-9
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003205
EISBN: 978-1-62708-199-3
... Flux-cored arc welding Gas tungsten arc welding Plasma arc welding Electroslag welding Electrogas welding Resistance welding Flash welding Oxyfuel welding Diffusion welding Friction welding Electron beam welding Laser beam welding Torch brazing Furnace brazing Induction brazing...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001311
EISBN: 978-1-62708-170-2
.... Fig. 15 Results from lubricated Falex wear tests for untreated and plasma-processed Ti-6Al-4V; carbon steel jaws. Source: Ref 16 One very active area of surface engineering research, mentioned above in the discussion of ion implantation, is in the area of surgical implants, where mechanical...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005336
EISBN: 978-1-62708-187-0
... preferred solution is to supply heat to the ladle, maintaining the alloy at minimal superheat during refining. This can be accomplished by induction heating, or the transferred arc plasma torch, with the added benefit of enhanced refining reactions that aid in the production of clean metal with low levels...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003162
EISBN: 978-1-62708-199-3
... either iron-, nickel-, or cobalt-base. Several welding processes are used to apply the hardfacing materials. They range from the traditional (for example, oxyacetylene torch) to more recently developed processes like plasma-transferred arc. To accommodate these different overlay processes, the...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003054
EISBN: 978-1-62708-200-6
... the reaction among graphite, water vapor, and nitrogen at moderate temperatures to produce hydrogen cyanide (HCN), which is also toxic. A final consideration concerning inert gas is the possibility of plasma formation. Plasmas are favored by high temperature, high voltage, and intermediate pressures...
Book Chapter

Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005299
EISBN: 978-1-62708-187-0
..., in addition to requiring excessive energy expenditure, can contribute to the problem of dirty steel. The preferred solution is to supply heat to the ladle, maintaining the steel at minimal superheat during refining. This can be accomplished by the transferred arc plasma torch, with the added benefit...