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weld atmosphere

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930353
EISBN: 978-1-62708-359-1
... weldability of the refractory metals, the formation of brittle intermetallics makes it difficult to weld. Trailing shields help reduce atmospheric contamination due to oxidation. Fixturing devices also should not come in close contact with the weld joint. Tantalum melts at 3000 °C (5430 °F); consequently...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280149
EISBN: 978-1-62708-267-9
... information on brazing processes, atmospheres, filler metals, and surface preparation procedures. It also includes examples of nickel-base welded components for aerospace use. brazing fusion welding solid-state welding superalloys transient liquid phase bonding Introduction General Aspects...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120065
EISBN: 978-1-62708-269-3
..., and the need for contaminant-free surfaces and atmospheres. It describes common forms of fusion, arc, and solid-state welding along with the use of filler metals, shielding gases, and stress-relief treatments. It also discusses the practice of titanium brazing and the role of filler metals. arc welding...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.cw.t51820115
EISBN: 978-1-62708-339-3
... steels (>0.2 wt% C), this process should be applied as soon as possible after welding to avoid the possibility of hydrogen-induced cracking from atmospheric corrosion. The weld must be cooled to a sufficiently low temperature to induce the austenite-to-martensite transformation (in principle, below...
Image
Published: 01 December 1984
Figure 1-23 Macroetching used to reveal the influence of weld parameters on penetration depth and shape. Top example shows GMA (gas-metal arc) welds at a heat input of 45 kJ/in using atmospheres of 100% CO 2 , argon plus 25% CO 2 , and argon plus 2% O 2 (left to right). Bottom example shows More
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.pb.t51230001
EISBN: 978-1-62708-351-5
... as: Mechanical fastening Adhesive bonding Brazing and soldering Welding Solid state joining Other methods, such as glass/metal sealing, electrostatic welding, and so forth, are dealt with elsewhere [ Messler 1999 ; Nicholas 1998 ; O’Brien 1991 ; Bever 1986 ]. Schematics of these joining...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.pb.9781627083515
EISBN: 978-1-62708-351-5
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480265
EISBN: 978-1-62708-318-8
... ductility and toughness, as shown in Table 12.2 . These welds were made at a speed of 150 mm/min (6 in.) per minute with 0.25% air, oxygen, and nitrogen added to the helium shielding gas. Loss of ductility and toughness is less pronounced at higher welding speeds. Effects of impure welding atmospheres...
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
... oxidation. Shielding gases are used to protect the molten metal from atmospheric nitrogen and oxygen as the weld pool is being formed. The shielding gas also promotes a stable arc and uniform metal transfer. In gas metal arc welding (GMAW) and flux cored arc welding (FCAW), the gas used has...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2007
DOI: 10.31399/asm.tb.pmsspmp.t52000167
EISBN: 978-1-62708-312-6
... Abstract This chapter describes secondary processes employed in the production of powder-metal stainless steel parts, including various machining operations, welding, brazing, sinter bonding, resin impregnation, re-pressing and sizing, and surface finishing. It also discusses the factors...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290079
EISBN: 978-1-62708-306-5
... processes and often with greater economy. Pipe with wall thickness up to 4.8 mm (3/16 in.) can be welded in a single pass. Oxygen and acetylene are the principal gases used in oxyfuel gas welding. Oxygen supports combustion of the fuel gases. Acetylene supplies both the heat intensity and the atmosphere...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2004
DOI: 10.31399/asm.tb.ps.t62440001
EISBN: 978-1-62708-352-2
... Abstract Soldering and brazing represent one of several types of methods for joining solid materials. These methods may be classified as mechanical fastening, adhesive bonding, soldering and brazing, welding, and solid-state joining. This chapter summarizes the principal characteristics...
Image
Published: 01 January 2000
accumulate if the vessel is open to the atmosphere. (b) Structural members should be designed to avoid retention of liquids; L-shaped sections should be used with the open side down, and exposed seams should be avoided. (c) Incorrect trimming or poor design of seals and gaskets can create crevice sites. (d More
Image
Published: 01 December 2015
accumulate if the vessel is open to the atmosphere. (b) Structural members should be designed to avoid retention of liquids; L-shaped sections should be used with open side down, and exposed seams should be avoided. (c) Incorrect trimming or poor design of seals and gaskets can create crevice sites. (d More
Image
Published: 01 August 1999
can accumulate if the vessel is open to the atmosphere. (b) Structural members should be designed to avoid retention of liquids; L-shaped sections should be used with open side down, and exposed seams should be avoided. (c) Incorrect trimming or poor design of seals and gaskets can create crevice More
Image
Published: 01 August 1999
can accumulate if the vessel is open to the atmosphere. (b) Structural members should be designed to avoid retention of liquids; L-shaped sections should be used with open side down, and exposed seams should be avoided. (c) Incorrect trimming or poor design of seals and gaskets can create crevice More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240395
EISBN: 978-1-62708-251-8
... of small parts. 21.3.3 Gas Carburizing The vast majority of carburized parts are processed by gas carburizing, using either natural gas, propane, or butane. The part is heated to approximately 900 °C (1650 °F) for 3 to 4 h in a carbon-rich atmosphere, usually a mixture of carbon monoxide and water...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.bcp.t52230401
EISBN: 978-1-62708-298-3
... and nitrides, considerable care must be taken on heating the metal to protect it from the ambient atmosphere. Both the strongly adherent oxide film and the nitrided surface inhibit wetting, flow, and coalescence during welding or brazing. In addition, beryllium cannot be fusion welded by any process that uses...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2004
DOI: 10.31399/asm.tb.ps.9781627083522
EISBN: 978-1-62708-352-2
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290137
EISBN: 978-1-62708-306-5
... employing oxyacetylene torches, a slightly reducing flame affords some atmospheric protection. Vacuum, inert, and reducing atmospheres have also been used. The normal welding sequence is to: (1) apply sufficient pressure to firmly seat the faying surfaces against one another, (2) heat the joint...