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gas stream heating sources

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Book Chapter

Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001483
EISBN: 978-1-62708-173-3
... of cutting processes that use controlled chemical reactions to remove preheated metal by rapid oxidation in a stream of pure oxygen. A fuel gas/oxygen flame heats the workpiece to ignition temperature, and a stream of pure oxygen feeds the cutting (oxidizing) action. The OFC process, which is also...
Book Chapter

Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0005175
EISBN: 978-1-62708-186-3
... reactions to remove preheated metal by rapid oxidation in a stream of pure oxygen. A fuel gas/oxygen flame heats the workpiece to ignition temperature, and a stream of pure oxygen feeds the cutting (oxidizing) action. The OFC process, which is also referred to as burning or flame cutting, can cut carbon and...
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
... (10 mbar, or 7.5 torr), evacuated again to 1 Pa (0.01 mbar, or 0.0075 torr), and backfilled to operating pressure. This procedure dilutes residual gas impurities by a factor of 1000. Plasma furnace equipment is of great interest when selecting a suitable heat source for melting, remelting, casting...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005529
EISBN: 978-1-62708-197-9
... walls; and Q loss is the loss taken by the cooling source and exhausted out of the furnace. From the point of view of physics, all modes of heat transfer must be considered during the heating process, that is, conduction within parts or accessories, convection of the gas medium, and the radiation...
Series: ASM Handbook
Volume: 4C
Publisher: ASM International
Published: 09 June 2014
DOI: 10.31399/asm.hb.v04c.a0005840
EISBN: 978-1-62708-167-2
... result in arcing to the product being heated—between the turns of the coil winding and/or to the buss work connecting the coil windings. Induction power sources often feature ground fault detection that will signal a failure of the high-dielectric coil insulation. In general, there ay be several water...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001335
EISBN: 978-1-62708-173-3
... denotes region in which spray and streaming transfer modes occur; globular transfer occurs at lower electrode speeds, and electrode contacts the weld pool at higher electrode speeds. Source: Ref 1 The issues described in this article include the: Total heat transferred to the base metal...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005621
EISBN: 978-1-62708-174-0
... temperatures of approximately 2600 K (4220 °F) ( Ref 2 ). This explains why the droplets transport one-half of the total heat transferred to the base metal. Fig. 11 Droplet velocities for spray transfer in gas metal arc welding of steel at three different open-circuit voltages. Source: Ref 6 A...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003041
EISBN: 978-1-62708-200-6
... functions of an autoclave system, including pressure vessel, gas stream heating and circulation sources, gas stream pressurizing systems, vacuum systems, control systems, and loading systems. The article includes information about modified autoclaves for specialized applications and safety practices in...
Book Chapter

Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003412
EISBN: 978-1-62708-195-5
.... It presents a discussion on the major elements of an autoclave system, namely, pressure vessel, gas stream heating and circulation sources, gas stream pressurizing systems, loading systems, and vacuum systems. The article describes a computerized approach to the simultaneous control of materials...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001354
EISBN: 978-1-62708-173-3
... Abstract Gas-metal arc welding (GMAW) is an arc welding process that joins metals together by heating them with an electric arc that is established between a consumable electrode (wire) and a workpiece. This article discusses the advantages and limitations, operating principle, metal transfer...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005590
EISBN: 978-1-62708-174-0
... heat and remain on the metal surface, restricting wetting, which, in turn, contributes to poor weld appearance. Fig. 9 Characteristics of current types for gas tungsten arc welding. DCEN, direct current electrode negative; DCEP, direct current electrode positive; ac, alternating current. Source...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001372
EISBN: 978-1-62708-173-3
... are caused to flow together and solidify without the application of pressure to the parts being joined. The most important source of heat for OFW is the oxyacetylene welding (OAW) torch. The simplest and most frequently used OFW system consists of compressed gas cylinders, gas pressure regulators...
Series: ASM Handbook
Volume: 4A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v04a.a0005799
EISBN: 978-1-62708-165-8
... distortion gas carburizing CARBURIZING is a case-hardening process in which steel parts (usually low-carbon steel) are heated to an austenitizing temperature and exposed to a carbon-rich atmosphere. Carbon is absorbed at the surface and diffuses down the chemical potential gradient to create a carbon...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005572
EISBN: 978-1-62708-174-0
... weld penetration, bead shape, arc stability, productivity, and overall weld quality. These include welding consumables, equipment settings, and gun manipulation. The major components of a GMAW installation such as a welding gun, shielding gas supply, electrode feed unit, power source, and associated...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005598
EISBN: 978-1-62708-174-0
... welding torch. A new configuration of hybrid plasma-GMAW is available, with in-line rather than concentric configuration of the two heat sources, and is also described briefly in the article Gas Metal Arc Welding . Fig. 1 Schematic of plasma gas metal arc welding equipment. Source: Ref 1...
Series: ASM Handbook Archive
Volume: 10
Publisher: ASM International
Published: 01 January 1986
DOI: 10.31399/asm.hb.v10.a0001747
EISBN: 978-1-62708-178-8
... Fig. 6 Typical thermal-conductive detection cell. Fine filament wires called thermistors sense the change in heat transfer. The thermistors are mounted in a cell body having porting for two flow streams, one for carrier gas only and the other for carrier gas and the gases from the separation...
Book Chapter

By Volker Heuer
Series: ASM Handbook
Volume: 4A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v04a.a0005770
EISBN: 978-1-62708-165-8
... the type of gas and the installed equipment, it takes between 4 and 20 s to reach the desired pressure level. Then, the gas stream is circulating through the load and extracting energy from the components, while the absorbed heat of the gas is released to an integrated heat exchanger. The amount of...
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.a0006663
EISBN: 978-1-62708-213-6
... a time-point in the process gas Provide the ability to transfer gas volumes from many different gas streams Reduce cross contamination with gas flushing and transfer line heating Because most applications of continuous gas monitoring are in industrial settings, robustness toward the...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001356
EISBN: 978-1-62708-173-3
.... Source: Ref 2 Gas-tungsten arc welding is used extensively for welding stainless steel, aluminum, magnesium, copper, and reactive materials (for example, titanium and tantalum). The process can also be used to join carbon and alloy steels. In carbon steels, it is primarily used for...
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.a0006659
EISBN: 978-1-62708-213-6
... (toxic substances that were used widely as heat-transfer fluids). The ECD uses a radioactive energy source to charge, or ionize, the carrier gas. The radioactive energy source is a β-emitter. (β-rays or particles are electrons.) The emitted electrons ionize the carrier gas, generating a standard current...