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tungsten electrode

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480161
EISBN: 978-1-62708-318-8
... invented by Werner von Bolton for melting tantalum. This small furnace had three particularly important features: a water-cooled copper hearth, a consumable electrode, and a vacuum system. Kroll modified the furnace to use a nonconsumable thoriated-tungsten electrode. He also replaced the hearth with a...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290023
EISBN: 978-1-62708-306-5
... an electrode. The electrode will be either a consumable wire or rod or a nonconsumable carbon or tungsten rod that carries the welding current. The electrode is manually or mechanically moved along the joint, or it remains stationary while the workpiece is moved. When a nonconsumable electrode is...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030096
EISBN: 978-1-62708-282-2
... austenitic stainless steels as well as several forms of corrosion associated with welding. The effects of gas-tungsten arc weld shielding gas composition and heat-tint oxides on corrosion resistance are then covered. Microbiological corrosion of butt welds in water tanks is also illustrated. In addition, the...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240583
EISBN: 978-1-62708-251-8
... tube electrodes, and various types of heating elements. Silicide coatings and noble metal claddings, such as platinum-gold alloys, are effective oxidation-resistant coatings. Powder metallurgy is used to produce most tungsten parts. Whether formed into ingots or bars for further processing or into...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060001
EISBN: 978-1-62708-261-7
... Abstract This chapter describes some of the technological milestones of the early 20th century, including the invention of tungsten carbide tool steel, the use of age-hardening aluminum in the Wright Flyer , the development of a new heat treating process for aluminum alloys, and Ford’s...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.mgppis.t60400109
EISBN: 978-1-62708-258-7
... aberration. Metallurgical microscope features such as apochromatic objectives, hyperplane oculars, vertical illuminators, counting reticles, widefield oculars, polarization filters, field diaphragms, interferometers, and tungsten-halogen lamps are explained. The optical system, nosepiece, types of objectives...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.spsp2.t54410621
EISBN: 978-1-62708-265-5
... Tools steels are defined by their wear resistance, hardness, and durability which, in large part, is achieve by the presence of carbide-forming alloys such as chromium, molybdenum, tungsten, and vanadium. This chapter describes the alloying principles employed in various tool steels, including...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2001
DOI: 10.31399/asm.tb.aub.t61170308
EISBN: 978-1-62708-297-6
... Abstract This article discusses the role of alloying in the production and use of common refractory metals, including molybdenum, tungsten, niobium, tantalum, and rhenium. It provides an overview of each metal and its alloys, describing the compositions, properties, and processing...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120065
EISBN: 978-1-62708-269-3
... cleaning of the workpiece and consumable and adequate gas shielding to prevent atmospheric contamination. Titanium and most titanium alloys can be welded by the following fusion welding techniques: Gas-tungsten arc welding (GTAW) Gas-metal arc welding (GMAW) Plasma arc welding (PAW...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910427
EISBN: 978-1-62708-250-1
... corroding equipment. Wide range of analytical tools available. Specific ion electrodes readily used. Moderate Analytical pH of process stream Commonly used in effluents. Standard equipment available through robust pH responsive electrodes, such as antimony, platinum, or tungsten, can be preferable to...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.tb.ssde.t52310201
EISBN: 978-1-62708-286-0
... phase composition shown in Fig. 1 . This diagram has an arbitrary cooling rate resembling that of tungsten inert gas (TIG; described in a separate section of this chapter) welds. Faster or slower cooling will change the relative amounts of ferrite and austenite because of the need for diffusion to...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.9781627082822
EISBN: 978-1-62708-282-2
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040277
EISBN: 978-1-62708-300-3
... steels O Air-hardening, medium-alloy cold work tool steel A High-carbon, high-chromium cold work tool steels D Mold steels P Hot work tool steels, chromium, tungsten, and molybdenum H Tungsten high-speed tool steels T Molybdenum high-speed tool steels M Table 21.2...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120047
EISBN: 978-1-62708-269-3
... is the elimination of tungsten inclusions, which in the REP method are produced by the tungsten electrode heat source. Both processes have a cleanliness advantage over GA, where inclusions can be produced from any ceramic used in the container nozzle. For PA powders, a number of processes have...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720411
EISBN: 978-1-62708-305-8
... solidification Overlap: The protrusion of weld metal beyond the toe or root of the weld Tungsten inclusions: Particles from tungsten electrodes embedded in the weld metal that result from improper gas tungsten arc welding procedures Backing piece left on: Failure to remove material placed at the...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030112
EISBN: 978-1-62708-282-2
... 7039-T651 base metal with alloy 5183 filler; 2-pass tungsten inert gas weld. SCE, saturated calomel electrode. Source: Ref 4 Fig. 3 Welded assemblies of aluminum alloy 7005 with alloy 5356 filler metal after a 1 year exposure to seawater. (a) As-welded assembly shows severe localized...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.t68350125
EISBN: 978-1-62708-315-7
... tools, tools and dies for ceramic and plastic processing, components used in the chemical and general processing industries, and machine elements. Commonly employed carbides include titanium carbide (TiC), silicon carbide (SiC), tungsten carbide (WC), chromium carbide (Cr 3 C 2 ), and boron carbide (B 4...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280117
EISBN: 978-1-62708-267-9
... positive electrode, which is rotated at high speed, is melted by a direct current electric arc between the consumable electrode and a stationary tungsten negative electrode ( Fig. 7.5 ). Centrifugal force causes spherical molten droplets to fly off the rotating electrode. These droplets freeze and are...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ems.t53730129
EISBN: 978-1-62708-283-9
... /ρ M ] is too high, the compressive stresses in the oxide may cause it to spall off. This is the case for Fe 2 O 3 . Another necessary condition for a protective oxide is that it must be solid. Tungsten and molybdenum oxidize very rapidly at high temperatures because their oxides are volatile...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280149
EISBN: 978-1-62708-267-9
.... Postweld heat treatment of precipitation-hardened alloys generally includes a re-solution treatment and an aging treatment. Superalloys can be welded by the following fusion welding techniques: Gas tungsten arc welding (GTAW) Gas metal arc welding (GMAW) Shielded metal arc welding (SMAW...