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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...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030096
EISBN: 978-1-62708-282-2
... compositions to inhibit certain precipitation reactions Shielding molten and hot metal surfaces from reactive gases in the weld environment Removing chromium-enriched oxides and chromium-depleted base metal from thermally discolored (heat tinted) surfaces Choosing the proper welding parameters ( Ref 1...
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 November 2007
DOI: 10.31399/asm.tb.htcma.t52080335
EISBN: 978-1-62708-304-1
.... The temperature at which carbon steel suffered accelerated corrosion attack was found to coincide with the melting point of the boiler tube deposits. The data strongly suggest that accelerated corrosion attack in the WTE boiler combustion environment was caused by the formation of molten phases in the tube...
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
.... Lack of shielding can lead to oxygen combining with chromium and other elements, creating slag and depleting the alloy of needed elements. Thus, oxygen-free gas mixtures are used to exclude the ambient atmosphere from the molten pool during electric arc welding. Inert gases provide the barrier, while...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480265
EISBN: 978-1-62708-318-8
... seam welding operations, special shielding is not required. In resistance welds, the molten and heated titanium is surrounded by solid metal, and the closeness of the surfaces being joined, the short welding cycles, and the electrodes pressed tightly against the sheets cut down contamination...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290165
EISBN: 978-1-62708-306-5
... Abstract Brazing and soldering processes use a molten filler metal to wet the mating surfaces of a joint, with or without the aid of a fluxing agent, leading to the formation of a metallurgical bond between the filler and the respective components. This chapter discusses the characteristics...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2001
DOI: 10.31399/asm.tb.secwr.9781627083157
EISBN: 978-1-62708-315-7
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.cw.t51820001
EISBN: 978-1-62708-339-3
... compositions to inhibit certain precipitation reactions, by shielding molten and hot metal surfaces from reactive gases in the weld environment, by removing chromium-enriched oxides and chromium-depleted base metal from thermally discolored (heat tinted) surfaces, and by choosing the proper welding parameters...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030112
EISBN: 978-1-62708-282-2
... elements from the molten weld pool Contamination of the solidifying weld pool Corrosion resistance can usually be maintained in the welded condition by balancing alloy compositions to inhibit certain precipitation reactions, by shielding molten and hot metal surfaces from reactive gases...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.bcp.t52230401
EISBN: 978-1-62708-298-3
..., the shim can be spot welded to the workpiece. Alternatively, the filler metal can be vapor deposited onto the part. Helium and argon gases are used to shield the molten and solidifying weld metal from the atmosphere. Weld metal porosity is lower with helium than it is with argon. However, some argon...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280149
EISBN: 978-1-62708-267-9
... contamination by a gaseous shield obtained from the combustion and decomposition of the electrode covering. Additional shielding is provided for the molten metal in the weld pool by a covering of molten flux or slag. Filler metal is supplied by the core of the consumable electrode and from metal powder mixed...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.cw.t51820169
EISBN: 978-1-62708-339-3
.... The most popular arc welding processes for joining dissimilar metals are shielded metal arc welding (SMAW), gas metal arc welding (GMAW), and gas tungsten arc welding (GTAW). References 1. Metals Dissimilar , Welding Handbook: Metals and Their Weldability , Vol 4 , 7th ed...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.9781627082617
EISBN: 978-1-62708-261-7
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 1999
DOI: 10.31399/asm.tb.lmcs.t66560309
EISBN: 978-1-62708-291-4
..., [1] the molten alloy is made to wet the surfaces of the workpieces and allowed to solidify so as to fill the gap between them. Brazing and braze welding processes differ. In brazing, the filler metal is distributed between closely fitting surfaces of the joint by capillary action; in braze...
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
..., military hardware, color television sets, radios, and cell phones. Tantalum is the refractory metal that is most resistant to corrosion. The only media that can affect it are fluorine, hydrofluoric acid, sulfur trioxide, fuming sulfuric acid, concentrated strong alkalis, and certain molten salts...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060117
EISBN: 978-1-62708-261-7
... and brazing also rely on interdiffusion with joining by primary (e.g., metallic) bonds. Unlike welding, however, brazing and soldering do not require or cause any melting (or solid-state mixing of atoms) between the base materials. Rather, bond formation occurs between molten filler and the substrates...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720411
EISBN: 978-1-62708-305-8
... contact with the molten weld pool Letting the filler metal come in contact with the hot tip of the electrode Using an excessive electrode extension Inadequate gas shielding or excessive wind drafts, which results in oxidation Using improper shielding gases such as argon-oxygen or argon-CO 2...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290099
EISBN: 978-1-62708-306-5
... contact with the molten weld pool Using an excessive electrode extension Inadequate gas shielding or excessive wind drafts that result in oxidation Using improper shielding gases such as argon-oxygen or argon-CO 2 mixtures, which are used for gas metal arc welding Tungsten inclusions...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290079
EISBN: 978-1-62708-306-5
... in the shielded metal arc welding process. The second type uses power discharged from a capacitor storage bank. The process based on a dc power source is known as stud arc welding, whereas the process that uses capacitors is known as capacitor discharge stud welding. Both the stud arc welding and capacitor...